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nsuRD CORRESPONDENCE                    g                    ]
nsuRD CORRESPONDENCE                    g                    ]
pg PUBLIC DUcUMENT ROOM                            SEP 131979 # y b    CN
pg PUBLIC DUcUMENT ROOM                            SEP 131979 # y b    CN d * *#
                                                                    "
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                                                                     ' "j 4l*"
UNITED STATES OF AMERICA            %/
UNITED STATES OF AMERICA            %/
NUCLEAR REGULATORY COMMISSION                'N'    C'
NUCLEAR REGULATORY COMMISSION                'N'    C' BEFORE THE ATOMIC SAFETY AND LICENSING APPEAL BOARD In the Matter of                    )
                                                                                  '
BEFORE THE ATOMIC SAFETY AND LICENSING APPEAL BOARD In the Matter of                    )
                                           )
                                           )
PUGET SOUND POWER & LIGHT            )      DOCKET NOS.      STN 50-522 COMPANY, et al.,                      )                              50-523
PUGET SOUND POWER & LIGHT            )      DOCKET NOS.      STN 50-522 COMPANY, et al.,                      )                              50-523
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(Skagit Nuclear Power Project, )              f5 ppd- l9          ,    1979 Units 1 and 2)                        )            1
(Skagit Nuclear Power Project, )              f5 ppd- l9          ,    1979 Units 1 and 2)                        )            1
                                           )
                                           )
        --
                                           )
                                           )
INTERVENOR SCANP ' S INTERROGATORIES AND REQUESTS FOR PRODUCTION TO APPLICANT TO:    APPLICANT PUGET SOUND POWER & LIGHT AND ITS ATTORNEYS In accordance with 10 CFR S2.740(b) and 10 CFR S2.741, please
INTERVENOR SCANP ' S INTERROGATORIES AND REQUESTS FOR PRODUCTION TO APPLICANT TO:    APPLICANT PUGET SOUND POWER & LIGHT AND ITS ATTORNEYS In accordance with 10 CFR S2.740(b) and 10 CFR S2.741, please
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t 7'9110 5 0 $"/ O 1269 084 (p.
t 7'9110 5 0 $"/ O 1269 084 (p.


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  .
                                                                    .
notes of telephone conversations, notes of meetings or other conve rs a tions , and all other records.
notes of telephone conversations, notes of meetings or other conve rs a tions , and all other records.
DATED this      day of                , 1979.
DATED this      day of                , 1979.
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k2b
k2b


. I
. I INTERROGATORY NO. 2:  Please indicate by overlays or index maps the sources of data for each pcrtion of Appendix A. A map similar to Figure 1-3 is requested. Please identify each area on the map as to the name of the author, the date of the pub-lication (or if the map is not part of a thesis, dissertation or other publication, the date of field work) and the scale of the au thor 's map. "Do not include within the authoriship of the Ap-li cants ' employees or consultants areas that were mapped by others, but merely field checked by the Applicants' employees or consultants.
  .
INTERROGATORY NO. 2:  Please indicate by overlays or index maps the sources of data for each pcrtion of Appendix A. A map similar to Figure 1-3 is requested. Please identify each area on the map as to the name of the author, the date of the pub-lication (or if the map is not part of a thesis, dissertation or other publication, the date of field work) and the scale of the au thor 's map. "Do not include within the authoriship of the Ap-li cants ' employees or consultants areas that were mapped by others, but merely field checked by the Applicants' employees or consultants.
ANSWER:
ANSWER:
1269 086
1269 086
 
. 7 REQ UEST FOR PRODUCTION NO. 1:  Please provide the field notes, Zield maps, and compilation maps of each area mapped since May  1,  1978 by the Applicants' employees or consultants.
. 7
  .
REQ UEST FOR PRODUCTION NO. 1:  Please provide the field notes, Zield maps, and compilation maps of each area mapped since May  1,  1978 by the Applicants' employees or consultants.
INTERROG ATORY NO. 3: Please provide names and prof essional qualifications of all geological and geophysical consultants to the appliccants that are/were not employees or consultants to Bechtel Corp.
INTERROG ATORY NO. 3: Please provide names and prof essional qualifications of all geological and geophysical consultants to the appliccants that are/were not employees or consultants to Bechtel Corp.
ANSWER:
ANSWER:
                      .
REQUEST FOR PRODUCTION NO. 2:    Please provide all field notes, field maps, compilation maps and other documents produced by the consultants (listed in the answer to interrogatory No. 3) or by the applicants in relation to said consultants.
REQUEST FOR PRODUCTION NO. 2:    Please provide all field notes, field maps, compilation maps and other documents produced by the consultants (listed in the answer to interrogatory No. 3) or by the applicants in relation to said consultants.
INTERROG ATORY NO. 4: Please identify the person or persons who described each thin section in Appendix r..
INTERROG ATORY NO. 4: Please identify the person or persons who described each thin section in Appendix r..
ANShT R:
ANShT R:
          .
1269 087 s
1269 087
 
s
.  .
  .
INTERROGATORY NO. 5:    Please indicate each thin section in Appendix E that was examined by Dr. Misch or by Dr. Gerald Miller and indicate each description in Appendix E that has been explicitly approved by either Dr.      Misch ' or D r. Miller.
INTERROGATORY NO. 5:    Please indicate each thin section in Appendix E that was examined by Dr. Misch or by Dr. Gerald Miller and indicate each description in Appendix E that has been explicitly approved by either Dr.      Misch ' or D r. Miller.
ANSWER:
ANSWER:
                                                .
                    .
INTERROGATORY NO. 6:  Please submit the professional qual-ifications and experience of the following persons:
INTERROGATORY NO. 6:  Please submit the professional qual-ifications and experience of the following persons:
Mr. Jorge Martinez D r. Robert L. Rose, San Jose State University Dr. Terry Davis, Los Angeles State University ANSWER:
Mr. Jorge Martinez D r. Robert L. Rose, San Jose State University Dr. Terry Davis, Los Angeles State University ANSWER:
1269 088
1269 088 s
 
s
.  .
  .
INTERROGATORY NO. 7:    Three high resolution seismic re-flection surveys are shown on Figure 3.4.1-7.      Please provide the f ollowing information:
INTERROGATORY NO. 7:    Three high resolution seismic re-flection surveys are shown on Figure 3.4.1-7.      Please provide the f ollowing information:
(a)    those portions (give S.P. numbers or other inter-c ep ts for each portion) in which penetration unequivocally was down to or below the bedrock surface, (b)  the depth (both as two way travel time and as feet) at which bedrock was penetrated, (c)  the location of these bedrock intercepts on Figure 3.4.1-7, (d)  the age in years of each prominent reflector above each bedrock intercept, (e)  Give the depth (both as two way travel time and as feet) for each'of these prominent reflectors in (d ) .
(a)    those portions (give S.P. numbers or other inter-c ep ts for each portion) in which penetration unequivocally was down to or below the bedrock surface, (b)  the depth (both as two way travel time and as feet) at which bedrock was penetrated, (c)  the location of these bedrock intercepts on Figure 3.4.1-7, (d)  the age in years of each prominent reflector above each bedrock intercept, (e)  Give the depth (both as two way travel time and as feet) for each'of these prominent reflectors in (d ) .
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(b)  It migh t also be noted that the bedrock surface is fairly eas ily identifiable on the lower frequency reflection lines run by MOBIL, thus if some doubt exists as to whether bedrock was penetrat9d on one of the high frequency lines, the depth to bedrock on nearby MO BIL lines could be checked for comparison.
(b)  It migh t also be noted that the bedrock surface is fairly eas ily identifiable on the lower frequency reflection lines run by MOBIL, thus if some doubt exists as to whether bedrock was penetrat9d on one of the high frequency lines, the depth to bedrock on nearby MO BIL lines could be checked for comparison.
ANSWER:
ANSWER:
1269 089
1269 089 INTERROGATORY NO. 8:    Several of the maps in Section 3 have a scale o~f approximately 1:24,000 and overlap to provide continuous coverage (Figures 3.2-2, 3.1-15, 3.1-16 3.1-17, 3.2-10, and 3.4.3-1). Furthermore, Figure 3.1-14 is within 1/2 mile of the edge of Figure 3.2-2, and the edge of PSAR Figure 2.5-26b is only 2 miles from the edge of Figure 3.2-2.
 
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.  .
  .
                                          .
INTERROGATORY NO. 8:    Several of the maps in Section 3 have a scale o~f approximately 1:24,000 and overlap to provide continuous coverage (Figures 3.2-2, 3.1-15, 3.1-16 3.1-17, 3.2-10, and 3.4.3-1). Furthermore, Figure 3.1-14 is within 1/2 mile of the edge of Figure 3.2-2, and the edge of PSAR Figure 2.5-26b is only 2 miles from the edge of Figure 3.2-2.
In some cases the geology shown on one map is different than that shown for the same area on an overlapping map (for example see Interrogatory # 41) . In another case the geological units shown on one figure do not show on another (compare Figure 3.2-2 with Figure 3.1-5).      Additionally, geological information critical to interpreting the maps commonly occu rs on one map but not in the area of ove rla p of another map 1269 090
In some cases the geology shown on one map is different than that shown for the same area on an overlapping map (for example see Interrogatory # 41) . In another case the geological units shown on one figure do not show on another (compare Figure 3.2-2 with Figure 3.1-5).      Additionally, geological information critical to interpreting the maps commonly occu rs on one map but not in the area of ove rla p of another map 1269 090


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                               ~
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  .
(compare Figure 3.2-2 and 3.2-10 with Figure 3.1-15) . Discre-pancies also occur between these maps at a scale of 1:24,000 and Appendix H (for example see Interrogatory #23).
(compare Figure 3.2-2 and 3.2-10 with Figure 3.1-15) . Discre-pancies also occur between these maps at a scale of 1:24,000 and Appendix H (for example see Interrogatory #23).
In order to f acilitate and clarify review of these volumes this interrogatory requests the following compilations and uni-formi ty in scale (at 1:24,000):
In order to f acilitate and clarify review of these volumes this interrogatory requests the following compilations and uni-formi ty in scale (at 1:24,000):
(a)  that two geological maps at a scale of 1:24,000 be prepared and that these maps include all of the 1:24,000 geological maps noted above, (b)  that one of the requested maps show the bedrock geo-logy, the other the glacial geology, (c)  that geological discrepancies between these maps, between them and Appendix H, and between the compilation maps on a scale of 1:24,000 and Appendix H be resolved.
(a)  that two geological maps at a scale of 1:24,000 be prepared and that these maps include all of the 1:24,000 geological maps noted above, (b)  that one of the requested maps show the bedrock geo-logy, the other the glacial geology, (c)  that geological discrepancies between these maps, between them and Appendix H, and between the compilation maps on a scale of 1:24,000 and Appendix H be resolved.
(d)  that all geological cross sections that have been prepared at various scales larger than 1:24,000.(for example Figure 3.1-13) for areas within the requested compilation maps also be redrafted to 1:24,000, (e)  that all aeromagnetic coverage within the area of the compilation map of a scale of 1:24,000 also be presented at a scale of 1:24,000 (Appendix A, page 7, notes that the data wer.e originally presented ona scale of 1:24,000) and that this map be prepared as an overlay to the geological maps (see Interro-ga tory No. 98).
(d)  that all geological cross sections that have been prepared at various scales larger than 1:24,000.(for example Figure 3.1-13) for areas within the requested compilation maps also be redrafted to 1:24,000, (e)  that all aeromagnetic coverage within the area of the compilation map of a scale of 1:24,000 also be presented at a scale of 1:24,000 (Appendix A, page 7, notes that the data wer.e originally presented ona scale of 1:24,000) and that this map be prepared as an overlay to the geological maps (see Interro-ga tory No. 98).
(f)  that all gravimetric coverage within the area of the compilation map of a scale of 1:24,000 also be presented at a
(f)  that all gravimetric coverage within the area of the compilation map of a scale of 1:24,000 also be presented at a 1269 091
                                                    ,
1269 091


.  .
  .
a sc'le of 1:24,000, and that this map be prepared as an overlay to the geological maps, (g)  that all ground magnetic traverses and aeromagnetic flight lines within the area of the compilation geological maps of a scale of 1:24,000 also be plosted at a scale of 1:24,000 and that the location of these traverses also be prepared as an overlay to the geological maps, (h)  that an index map be presented showing which geolo-gists mapped which portion of the requested 1:24,000 scale geological maps (see Interrogatories #2 and 36).
a sc'le of 1:24,000, and that this map be prepared as an overlay to the geological maps, (g)  that all ground magnetic traverses and aeromagnetic flight lines within the area of the compilation geological maps of a scale of 1:24,000 also be plosted at a scale of 1:24,000 and that the location of these traverses also be prepared as an overlay to the geological maps, (h)  that an index map be presented showing which geolo-gists mapped which portion of the requested 1:24,000 scale geological maps (see Interrogatories #2 and 36).
The following suggestions are made in hopes of producing geological maps of the highest possible quality:
The following suggestions are made in hopes of producing geological maps of the highest possible quality:
(a) that the mapped units be in color as they are for Figu res 3.1-12, 3.1-14, 3.1-15, 3.1-16, 3.1-17, etc., and the PSAR Figu res 2.5-4b, 2.5-7s, etc.,
(a) that the mapped units be in color as they are for Figu res 3.1-12, 3.1-14, 3.1-15, 3.1-16, 3.1-17, etc., and the PSAR Figu res 2.5-4b, 2.5-7s, etc.,
                    ,
(b)  that in addition to colors, individual strike and dip symbols be shown as they are in Figure 3.2-2 and 3.2-10 rather than the barely legible style used in Figure 3.4.31, (PSAR Figure 2.5-7ab is a possible model),
(b)  that in addition to colors, individual strike and dip symbols be shown as they are in Figure 3.2-2 and 3.2-10 rather than the barely legible style used in Figure 3.4.31, (PSAR Figure 2.5-7ab is a possible model),
(c) that contacts (observed, cove red, or inferred) be shown for mappable units (which might be defined as two or more nearby outcroos of similar lithologies) be shown so as to ind,icate the structural and stratigr- 'i c features of the area, (d) that by using techniques (a), (b ), and (c), noto-tions on the maps can be considerably reduced, thereby en-hancing clarity of concept and of presentation, (e) that the Applicant be encouraged to expand the area of the compilation maps here requested if he has available additional mapping at a scale of 1:24,000 or greater, and (f)  that if the compilation maps become so large as to be cumbersome, the Applicant consider preparing two or more adjoining maps (as Federal and State geological surveys com-monly do for adjoining quadrangles).
(c) that contacts (observed, cove red, or inferred) be shown for mappable units (which might be defined as two or more nearby outcroos of similar lithologies) be shown so as to ind,icate the structural and stratigr- 'i c features of the area, (d) that by using techniques (a), (b ), and (c), noto-tions on the maps can be considerably reduced, thereby en-hancing clarity of concept and of presentation, (e) that the Applicant be encouraged to expand the area of the compilation maps here requested if he has available additional mapping at a scale of 1:24,000 or greater, and (f)  that if the compilation maps become so large as to be cumbersome, the Applicant consider preparing two or more adjoining maps (as Federal and State geological surveys com-monly do for adjoining quadrangles).
1269 092
1269 092


.  .
  .
ANSWER:
ANSWER:
                        .
Many of the interrogatories that follow are requests for additional information, clarification of geological or geophy-s i c,c'a l da ta, and requests for a common data base of 1:24,000 within the area for which this interrogatory rquests a compila-tion at a unificd scale of 1:24,000.      Thus some of the following interrogatories duplicate the request made here.        If the Applicant meets the requests made herein and believes that in doing so he has answered individual interrogatories that follow, he should so indicate for each interrogatory.
Many of the interrogatories that follow are requests for additional information, clarification of geological or geophy-s i c,c'a l da ta, and requests for a common data base of 1:24,000 within the area for which this interrogatory rquests a compila-tion at a unificd scale of 1:24,000.      Thus some of the following interrogatories duplicate the request made here.        If the Applicant meets the requests made herein and believes that in doing so he has answered individual interrogatories that follow, he should so indicate for each interrogatory.
1269 093
1269 093


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INTERROGATORY NO. 9:  Page 3.4.1-16 s tates that strandlines occur in Everson drif t on either side of the "B&B" (and by implication the BB-LC) fault. Please provide the.following information:                                              ,
INTERROGATORY NO. 9:  Page 3.4.1-16 s tates that strandlines occur in Everson drif t on either side of the "B&B" (and by implication the BB-LC) fault. Please provide the.following information:                                              ,
(a)  a geological map of the Everson drift in the areas in-dicated on Figure 3.4.1-3 at a scale of 1:24,000 or greater.
(a)  a geological map of the Everson drift in the areas in-dicated on Figure 3.4.1-3 at a scale of 1:24,000 or greater.
Line 142: Line 94:
(b)  the location of strandlines across the B&B fault that are known to be correlative, (c) the evidence for the absolute age of these correlative strandlines, (d)  the methods f~or determining the altitudes of these strandlines within 10 feet (see Interrogatory No. 57), and (e)  because this map will be at a scale of 1:24,000, please include it as part of Interrogatory #8, including aeromagnetic data at the same scale.
(b)  the location of strandlines across the B&B fault that are known to be correlative, (c) the evidence for the absolute age of these correlative strandlines, (d)  the methods f~or determining the altitudes of these strandlines within 10 feet (see Interrogatory No. 57), and (e)  because this map will be at a scale of 1:24,000, please include it as part of Interrogatory #8, including aeromagnetic data at the same scale.
ANSWER:
ANSWER:
1269 094
1269 094 INTERROGATORY NO. 10:    Page 3.1-24 states that the rocks of the Church Mountain plate give " rise to a high-intensity magne-tic background with high amplitude, short wave length magnetic anamolies characterizing the magnetic signature of the plate."
                                                                        .
 
.  .
  .
                                                                      .
INTERROGATORY NO. 10:    Page 3.1-24 states that the rocks of the Church Mountain plate give " rise to a high-intensity magne-tic background with high amplitude, short wave length magnetic anamolies characterizing the magnetic signature of the plate."
Please provide an aeromagnetic map of any major portion of the type area of the Church Mountain plate from the Canadian border to the Sauk River that shows its characteristic magnetic signature. For ease in comparison, please provide this map at the same scale and with the same contour interval of gammas as was used in Appendix I (or whatever map best characterizes the magnetic signature of the Church Mountain plate in the vicinity of the plant site; as indicated in Interrogatory No. 8, the best scale would be 1:24,000). Please evaluate or model the ef fects that differences in the (1) spacing of flight lines and (2) ground clearance of the aircraf t in the two areas might have in making the magnetic signatures appear to be different.
Please provide an aeromagnetic map of any major portion of the type area of the Church Mountain plate from the Canadian border to the Sauk River that shows its characteristic magnetic signature. For ease in comparison, please provide this map at the same scale and with the same contour interval of gammas as was used in Appendix I (or whatever map best characterizes the magnetic signature of the Church Mountain plate in the vicinity of the plant site; as indicated in Interrogatory No. 8, the best scale would be 1:24,000). Please evaluate or model the ef fects that differences in the (1) spacing of flight lines and (2) ground clearance of the aircraf t in the two areas might have in making the magnetic signatures appear to be different.
AN SWE R:
AN SWE R:
1269 095      3
1269 095      3 INTERROGATORY NO. 11:  Please provide an aeromagnetic map of the San Juan Islands (from San Juan Island on the west to Interstate 5 on the east) showing the characteristic magnetic signature of these rocks. For ease in comparison, please provide this map at the same scale and with the same contour interval of gammas as was used in Appendix I (or whatever scale
 
.  '.
  .
INTERROGATORY NO. 11:  Please provide an aeromagnetic map of the San Juan Islands (from San Juan Island on the west to Interstate 5 on the east) showing the characteristic magnetic signature of these rocks. For ease in comparison, please provide this map at the same scale and with the same contour interval of gammas as was used in Appendix I (or whatever scale
[such as 1:24,000] best characterizes the magnetic signature of the alleged Church Mountain plate in the vicinity of the plant site). Please evaluate or model the ef fects that dif ferences in the (1) spacing of flight lines and (2) ground clearance of the aircraft in the two areas might have in making the magnetic signatures appear to be different.
[such as 1:24,000] best characterizes the magnetic signature of the alleged Church Mountain plate in the vicinity of the plant site). Please evaluate or model the ef fects that dif ferences in the (1) spacing of flight lines and (2) ground clearance of the aircraft in the two areas might have in making the magnetic signatures appear to be different.
ANSWER:
ANSWER:
1269 096        ,
1269 096        ,
                    ,                                                    .
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    .
.
REQUEST FOR PRODUCTION NG. 3:  Please provide the field notes, field maps, and compilation maps of the geological map-ping mentioned on page 3.4.1-5 of Pleistoc?ne sediments done for the 1978-1979 s tudy. Please name all persons involved in this mapping.
REQUEST FOR PRODUCTION NG. 3:  Please provide the field notes, field maps, and compilation maps of the geological map-ping mentioned on page 3.4.1-5 of Pleistoc?ne sediments done for the 1978-1979 s tudy. Please name all persons involved in this mapping.
If this mapping is available on a scale of 1:24,000, please include it as part cf Interrogatory No. 8.
If this mapping is available on a scale of 1:24,000, please include it as part cf Interrogatory No. 8.
Line 169: Line 106:
criteria can be used to distinguish ehe Shuksan thrust from other faults that may have juxtaposed rocks of the Shuksan plate agians fthe alleged " Church Mountain" plate.
criteria can be used to distinguish ehe Shuksan thrust from other faults that may have juxtaposed rocks of the Shuksan plate agians fthe alleged " Church Mountain" plate.
ANSWER:
ANSWER:
                                                                      .
1269 097 INTERROGATORY No. 13:  Figure 3.1-11 shows the alternative interpretations for a thrust plate south of the Skagit River.
1269 097
                                                                        .
 
  .
,
INTERROGATORY No. 13:  Figure 3.1-11 shows the alternative interpretations for a thrust plate south of the Skagit River.
In Appendix E, pages E-6 and E-19 s tate that Vance belicves that the rocks beneath the Shuksan thrust plate in the study area are correlative with some rocks of the San Juan terrane.
In Appendix E, pages E-6 and E-19 s tate that Vance belicves that the rocks beneath the Shuksan thrust plate in the study area are correlative with some rocks of the San Juan terrane.
Please list the reasons why Vance believes that these rocks are part of the " San Juan terrane" and the criteria he uses to distinguish " San Juan" rocks from rocks of the Church Mountain thrust plate.
Please list the reasons why Vance believes that these rocks are part of the " San Juan terrane" and the criteria he uses to distinguish " San Juan" rocks from rocks of the Church Mountain thrust plate.
ANSWER:
ANSWER:
                  .
INTERROG ATORY NO. 14:  Please list the criteria that Bech-tel and its consultants (especially Miller) use to distinguish
INTERROG ATORY NO. 14:  Please list the criteria that Bech-tel and its consultants (especially Miller) use to distinguish
     " San J tan" rocks from rocks of the Church Mountain thrust plate.
     " San J tan" rocks from rocks of the Church Mountain thrust plate.
ANSWER:
ANSWER:
                                                                      .
1269 098        '
1269 098        '
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INTERROGATORY NO. 15:  Page E-19 s tates that greenschists have been recognized' on the west side of upper Day Creek.
INTERROGATORY NO. 15:  Page E-19 s tates that greenschists have been recognized' on the west side of upper Day Creek.
Please indicate which of these samples are described in Table E-2 as implied on page E-19.
Please indicate which of these samples are described in Table E-2 as implied on page E-19.
ANSWER:
ANSWER:
                    .
INTERROGATORY NO. 16:  Page 3.1-29 s tates that the Shuksan thrust is a zone. However, Figure 3.4.3-1 appears to be the only figure that shows even a portion of this zone as a separate map-able unit. Therefore, please show this zone on the 1:24,000 compilation map requested in Interrogatory No. 8 or the revised maps requested in Interrogatories No. 19 and 22) and on Appendix H (if this zone is wide enough to show at 1:62,500).
INTERROGATORY NO. 16:  Page 3.1-29 s tates that the Shuksan thrust is a zone. However, Figure 3.4.3-1 appears to be the only figure that shows even a portion of this zone as a separate map-able unit. Therefore, please show this zone on the 1:24,000 compilation map requested in Interrogatory No. 8 or the revised maps requested in Interrogatories No. 19 and 22) and on Appendix H (if this zone is wide enough to show at 1:62,500).
Wherever possible, please show the following within the thrust zone:
Wherever possible, please show the following within the thrust zone:
(a)  the extent of exotic slices of serpentinite, silica carbonate rock, and other rock types, 1~269  099
(a)  the extent of exotic slices of serpentinite, silica carbonate rock, and other rock types, 1~269  099


. '.
4  i (b)  foliations within (a),
4  i (b)  foliations within (a),
(c)  shear zones, catalas tic zones, and mylonitic zone, and (d)  any other features that are distinctive of this thrust zone.
(c)  shear zones, catalas tic zones, and mylonitic zone, and (d)  any other features that are distinctive of this thrust zone.
Line 207: Line 131:
INTERROGATORY NO. 17:  Page 3.1-29 s tates that the Dar-rington phyllite on Cultus Mountain has prominent and pervasive kink bands, crenulations, and quartz veins and pods. Please show the location and orientation of the king bands of discordant quartz veins on Appendix H, Figure 3.1-12, or Figure 3.1-14.
INTERROGATORY NO. 17:  Page 3.1-29 s tates that the Dar-rington phyllite on Cultus Mountain has prominent and pervasive kink bands, crenulations, and quartz veins and pods. Please show the location and orientation of the king bands of discordant quartz veins on Appendix H, Figure 3.1-12, or Figure 3.1-14.
AN SWER:
AN SWER:
1269 100
1269 100 INTERROG ATORY NO. 18: What other localities (other than the locality mentioned on p. 3.1-29) within the area of Appen-dix H have prominent kink bands and discordant quartz veins?
 
. .
        .
                                                  .
INTERROG ATORY NO. 18: What other localities (other than the locality mentioned on p. 3.1-29) within the area of Appen-dix H have prominent kink bands and discordant quartz veins?
Flease give the strike and dip of these features at each locality.
Flease give the strike and dip of these features at each locality.
ANSWER:
ANSWER:
                                            .
                  .
INTERROGATORY NO. 19:  Page 3.1-29 s tates that the Shuksan f ault as shown on Figure 3.1-12 and 3.1-14 is a zone marked by intensely sheared rock, serp ent inite, and altered serpentinite.
INTERROGATORY NO. 19:  Page 3.1-29 s tates that the Shuksan f ault as shown on Figure 3.1-12 and 3.1-14 is a zone marked by intensely sheared rock, serp ent inite, and altered serpentinite.
Please show the geographical extent of this zone on Figures 3.1-12 and 3.1-14 and the strike and dips measured on rocks within this zone.
Please show the geographical extent of this zone on Figures 3.1-12 and 3.1-14 and the strike and dips measured on rocks within this zone.
ANSWE R:
ANSWE R:
1269 101
1269 101 INTERROGATORY NO. 20:  Cross section A-A of Figure 3.1-13 shows structures and lithologies in the Shuksan plate that do not appear on Appendix H (which, according to Note #1 is the source of the data for Figure 3.1-13) . Please explain the source of the data for the following:
 
.
INTERROGATORY NO. 20:  Cross section A-A of Figure 3.1-13 shows structures and lithologies in the Shuksan plate that do not appear on Appendix H (which, according to Note #1 is the source of the data for Figure 3.1-13) . Please explain the source of the data for the following:
a)  the antiform and synform shown in the Shuksan rocks underlying the Cultus mountain, b)  the stippled unit shown in the Shuksan rocks under-lying Cultus Mountain, c)  what this stippled unit is, and d)  the synform shown in Shuksan rocks in the valley of Day Creek.
a)  the antiform and synform shown in the Shuksan rocks underlying the Cultus mountain, b)  the stippled unit shown in the Shuksan rocks under-lying Cultus Mountain, c)  what this stippled unit is, and d)  the synform shown in Shuksan rocks in the valley of Day Creek.
ANSWE R:
ANSWE R:
                  .
INTERROGATORY NO. 21:  To draw the eastward dipping zone of the Shuksan thrust fault shown on Profile A-A of Figure 3.1-14, marker units must have been recognized in adjacent holes (or in all three holes). Please describe these units, give their intercepts in each hole, and shown them on a cross section through the holes.
INTERROGATORY NO. 21:  To draw the eastward dipping zone of the Shuksan thrust fault shown on Profile A-A of Figure 3.1-14, marker units must have been recognized in adjacent holes (or in all three holes). Please describe these units, give their intercepts in each hole, and shown them on a cross section through the holes.
ANSWER:
ANSWER:
                                                      -.
1269 102
1269 102


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INTERROG ATORY NO. 22: Please show on Figures 3.1-15 and 3.1-16 the features that are discussed on pages 3.1-34 to 3.1-36:
INTERROG ATORY NO. 22: Please show on Figures 3.1-15 and 3.1-16 the features that are discussed on pages 3.1-34 to 3.1-36:
a)  the strike and dip of quartz stringers, highly crenu-lated foliation planes, and zones of contortion of the Darrington phyllite, b)  the geographic extent, and the strike and dip of the contacts of tectonic inclusions within the Shuksan thrust plate within the alldged Church Mountair. plate in the southern half of sections 5, 8, and most of the western half of section 9, T34N, R6E, c)  the geographic extent, contacts, and strike and dip of the rocks of the prominent greenstone ridge that extends from Little Haystack Mountain through the west side of section 9 nearly to Rocky Creek, d)  all of the several folds mapped in the metasediments in the southwest quarter of section 5 north of Little Haystack Moun-tain, e)  the geographic extent, contacts, and the strike and dip of the contacts and of rocks in the several tectonic blocks that are well exposed in the SW/4 section 9, 1269 103
a)  the strike and dip of quartz stringers, highly crenu-lated foliation planes, and zones of contortion of the Darrington phyllite, b)  the geographic extent, and the strike and dip of the contacts of tectonic inclusions within the Shuksan thrust plate within the alldged Church Mountair. plate in the southern half of sections 5, 8, and most of the western half of section 9, T34N, R6E, c)  the geographic extent, contacts, and strike and dip of the rocks of the prominent greenstone ridge that extends from Little Haystack Mountain through the west side of section 9 nearly to Rocky Creek, d)  all of the several folds mapped in the metasediments in the southwest quarter of section 5 north of Little Haystack Moun-tain, e)  the geographic extent, contacts, and the strike and dip of the contacts and of rocks in the several tectonic blocks that are well exposed in the SW/4 section 9, 1269 103 f)  the strike and dip of the contact between the Shuksan plate and the serpentinite that is clearly f aulted f rom Rocky Creek to the gap between Little Haystack Mountain and Talc Mountain, especially in Section 9, and g)  the geographic extent, contacts, and strike and dips of any other units or outcrops in the areas of Figure 3.1-15 and Figure 3.1-16 that are not shown on Appendix H.    (One example might be the zone of intensely sheared rock at the base of Shuksan thrust as mentioned on pages 3.1-29 for other areas and as requested in Interrogatory No. 16).
 
.
f)  the strike and dip of the contact between the Shuksan plate and the serpentinite that is clearly f aulted f rom Rocky Creek to the gap between Little Haystack Mountain and Talc Mountain, especially in Section 9, and g)  the geographic extent, contacts, and strike and dips of any other units or outcrops in the areas of Figure 3.1-15 and Figure 3.1-16 that are not shown on Appendix H.    (One example might be the zone of intensely sheared rock at the base of Shuksan thrust as mentioned on pages 3.1-29 for other areas and as requested in Interrogatory No. 16).
ANSWER:
ANSWER:
    .
                .
INTERROGATORY NO. 23:  Please explain the reasons for the difference in the mapped location of the northern part of the major serpentinite belt in Figure 3.1-15 and in Appendix H.
INTERROGATORY NO. 23:  Please explain the reasons for the difference in the mapped location of the northern part of the major serpentinite belt in Figure 3.1-15 and in Appendix H.
If the strike and dip of the contacts and of the rocks ad-jacent to and within the serpentinite belt are available but are not shown on Appendix H,  please showp" them on Figure 3.1-15 or the map requested in Interrogatory # 8.
If the strike and dip of the contacts and of the rocks ad-jacent to and within the serpentinite belt are available but are not shown on Appendix H,  please showp" them on Figure 3.1-15 or the map requested in Interrogatory # 8.
ANSWER:
ANSWER:
1269 104
1269 104 INTERROGATORY NO. 24:  Profile A-A of figure 3.1-16 indi-cates that TH-3C and TH-3B penetrated two bodies of serpentinite within the Shuksan thrust plate. Please indicate where these units are describeed in the core logs of Appendix G.
 
_ ......__ _ _
,
INTERROGATORY NO. 24:  Profile A-A of figure 3.1-16 indi-cates that TH-3C and TH-3B penetrated two bodies of serpentinite within the Shuksan thrust plate. Please indicate where these units are describeed in the core logs of Appendix G.
ANSWER:
ANSWER:
s
s 7,    +n 1, ' .
                        .
                                                                                .
                                                                          .
7,    +n
                                                                  ,
                                                                        ., $
1, ' .
INTERROG ATORY NO. 25: Page 3.1-37 and Appendix G indicat            ;'
INTERROG ATORY NO. 25: Page 3.1-37 and Appendix G indicat            ;'
                                                                    ,.
                                                                      '
that hole TH-3C penetrated more than 90 feet of serpentinite.
that hole TH-3C penetrated more than 90 feet of serpentinite.
                                                                    '
Please explain how this serpentinite is known to be the sam.
Please explain how this serpentinite is known to be the sam.
one that is shown on the map on Figure 3.1-16.                          fi ANSWER:
one that is shown on the map on Figure 3.1-16.                          fi ANSWER:
                                                                                  '
1..
1..
1269 115
1269 115 REQUEST POR PRODUCTION NO. 5:  The Applicants ' geological interpretation of South Chucaknut Mountain remains substantially different than Schmidt 's  (1972). EDCON's interpretation of the aeromagnetic pattern over South Chuckanut Mount (Appendix A,    Fi-gure 23A to 23D) is presented at a scale of 1:24,000. Please sub-mit a ggeological map with a scale of 1:24,000 (or larger) that shows the Applicant's interpretation of the geology and which was used as the geological base for EDCON's 1:24,000 study. Because part of the aeromagnetic pattern extends f rom Dogfish point on the northwest to Whitehall Creek on the south, a geological map at a scale of 1:24,000 (or larger) of all T36N/R3E is requested.
 
,
REQUEST POR PRODUCTION NO. 5:  The Applicants ' geological interpretation of South Chucaknut Mountain remains substantially different than Schmidt 's  (1972). EDCON's interpretation of the aeromagnetic pattern over South Chuckanut Mount (Appendix A,    Fi-gure 23A to 23D) is presented at a scale of 1:24,000. Please sub-mit a ggeological map with a scale of 1:24,000 (or larger) that shows the Applicant's interpretation of the geology and which was used as the geological base for EDCON's 1:24,000 study. Because part of the aeromagnetic pattern extends f rom Dogfish point on the northwest to Whitehall Creek on the south, a geological map at a scale of 1:24,000 (or larger) of all T36N/R3E is requested.
INTERROG ATORY NO. 26:  EDCON's interpretation that Goat Mountain is a body of ultraf amic rock that dips southwesterly 60 to 70* (Appendix A, p. 44) is different than the interpretation of Thompson (1973), Christensen (1971), and Thompson and Robinson (1975) that the much larger Twin sisters body immediately to the north is essentially a flat lying slab only a kilome ter- or two thick. Please explain the reason that EDCON came to such a different conclusion.
INTERROG ATORY NO. 26:  EDCON's interpretation that Goat Mountain is a body of ultraf amic rock that dips southwesterly 60 to 70* (Appendix A, p. 44) is different than the interpretation of Thompson (1973), Christensen (1971), and Thompson and Robinson (1975) that the much larger Twin sisters body immediately to the north is essentially a flat lying slab only a kilome ter- or two thick. Please explain the reason that EDCON came to such a different conclusion.
Also please submit any geological map on a scale of 1:62,500 (other than Appendices H and I) or larger that the Applicant may have that supports EDCON's interpretation of the aeromagnetic data. This map should delineate the zones cf serpentinization as these will drastically af fect the magnetic signature of the body and the interpretations based thereon.
Also please submit any geological map on a scale of 1:62,500 (other than Appendices H and I) or larger that the Applicant may have that supports EDCON's interpretation of the aeromagnetic data. This map should delineate the zones cf serpentinization as these will drastically af fect the magnetic signature of the body and the interpretations based thereon.
1269 106 ANSWER:
1269 106 ANSWER:
.  .
  .
INTERROGATORY NO. 27. Please submit a geological map with a scale larger than 1:62,500 covering the area on Lyman Hill with a one mile radius beyond the mapped po'rtion of the greenstone in Section 24, T36N, RSE that is shown in Appendix H.
INTERROGATORY NO. 27. Please submit a geological map with a scale larger than 1:62,500 covering the area on Lyman Hill with a one mile radius beyond the mapped po'rtion of the greenstone in Section 24, T36N, RSE that is shown in Appendix H.
Secondly in addition to Figure 22B and 22C of Appendix A, please indicate the best possible fit of a calculated magnetic response to the observed response of the body in Section 25 that can be generated by varing (a) the thickness of the body from 250 to 500 feet, (b) the length of the body in a northwesterly direction from 0.5 to 1.25 miles, and (c) the width of the body from 0.25 to 0.5 miles in a northeasterly direct. Assume during this modeling that the body is roughtly tabular and that it dips no more than 20* in any direction.
Secondly in addition to Figure 22B and 22C of Appendix A, please indicate the best possible fit of a calculated magnetic response to the observed response of the body in Section 25 that can be generated by varing (a) the thickness of the body from 250 to 500 feet, (b) the length of the body in a northwesterly direction from 0.5 to 1.25 miles, and (c) the width of the body from 0.25 to 0.5 miles in a northeasterly direct. Assume during this modeling that the body is roughtly tabular and that it dips no more than 20* in any direction.
ANSWE R:
ANSWE R:
                                                          ,
1269 107 INTERROGATORY NO. 28:  Please provide the best two alterna-tive 2 dimensional models to explain aeromagnetic high in sec-tions 11, 12, 14 and 14, T 35N, R 4E and the adjacent aeromagnetic low to the northwest.
1269 107
 
INTERROGATORY NO. 28:  Please provide the best two alterna-tive 2 dimensional models to explain aeromagnetic high in sec-tions 11, 12, 14 and 14, T 35N, R 4E and the adjacent aeromagnetic low to the northwest.
ANSWER:
ANSWER:
INTERROGATORY NO. 29:  Please explain what criteria the applicants used to distinguish Darrington phyllite from the pelitic rocks of the San Juan Islands. That is, if both rocks occurred within the same area, what criteria could be used to tell them apart?
INTERROGATORY NO. 29:  Please explain what criteria the applicants used to distinguish Darrington phyllite from the pelitic rocks of the San Juan Islands. That is, if both rocks occurred within the same area, what criteria could be used to tell them apart?
ANSWER:
ANSWER:
1269 108
1269 108 INTERROGATORY NO. 30:    Please explain the basis for the state-ment on page 3.2-3 that if a normal f ault were parallel to Gilli-gan Creek, it "would require a minimum of 1500 ft. of down-on-the eas t displacement".
 
. .
INTERROGATORY NO. 30:    Please explain the basis for the state-ment on page 3.2-3 that if a normal f ault were parallel to Gilli-gan Creek, it "would require a minimum of 1500 ft. of down-on-the eas t displacement".
Please provide the nume rical value (or range of va.'ues) of the dips, amount of apparent offsets, and other data that were used to calculate the 1500 feet of displacement.
Please provide the nume rical value (or range of va.'ues) of the dips, amount of apparent offsets, and other data that were used to calculate the 1500 feet of displacement.
ANSWER:
ANSWER:
                  .
INTERROGATORY NO. 31:    Assuming that the Gilligan Creek fault does axist in the location shown by Whetten (Figure 3.1-11) but that the Shuksan thrust plate dips in the direction opposite to that shown by Whetten (that is, about as shown in the PSAR Interpretation and the Vance Interpretation of Figure 3.1-11),
INTERROGATORY NO. 31:    Assuming that the Gilligan Creek fault does axist in the location shown by Whetten (Figure 3.1-11) but that the Shuksan thrust plate dips in the direction opposite to that shown by Whetten (that is, about as shown in the PSAR Interpretation and the Vance Interpretation of Figure 3.1-11),
please calculate the maximum and minimum possible of fsets of the Gilligan Creek f ault for two possibilities:
please calculate the maximum and minimum possible of fsets of the Gilligan Creek f ault for two possibilities:
Line 300: Line 177:
l269 109
l269 109


.
  .
Thus, four calculated offsets are requested. Please provide the numerical valuec of the dips, amount of apparent offset, and other data used to make each of these four calculations.
Thus, four calculated offsets are requested. Please provide the numerical valuec of the dips, amount of apparent offset, and other data used to make each of these four calculations.
ANSWER:
ANSWER:
                    .
INTERROGATORY NO. 32:  Please draw a non-diagramma tic (i. e.
INTERROGATORY NO. 32:  Please draw a non-diagramma tic (i. e.
actual) cross section along A-A of Figure 3.1-12 (to replace A-A of Figure 3.1-13 ) . Please extend this cross ection to the same depths as shown in cross section A-A of Figure 3.1-13.      Because this cross section is within the area of the compilation map reques ted in Interroga tory No. 8, please present this cross section at a scale of 1:24,000.
actual) cross section along A-A of Figure 3.1-12 (to replace A-A of Figure 3.1-13 ) . Please extend this cross ection to the same depths as shown in cross section A-A of Figure 3.1-13.      Because this cross section is within the area of the compilation map reques ted in Interroga tory No. 8, please present this cross section at a scale of 1:24,000.
Line 310: Line 184:
1269 110 da
1269 110 da


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INTERROGATORY NO. 33:  Please provide a geological map of the glacial sediments referred to en pages 3.2-5, 3.2-8,  and 3.2-12.
INTERROGATORY NO. 33:  Please provide a geological map of the glacial sediments referred to en pages 3.2-5, 3.2-8,  and 3.2-12.
The scale of this map should be the same as Figures 3.2-2 and 3.2-3.
The scale of this map should be the same as Figures 3.2-2 and 3.2-3.
Line 319: Line 190:
a) the kink banding and isoclinal folding of intervals of Darrington phyllitementioned on p. 3.2-2, b)  the deformed glacial clays shown in the NW/4 section 35, at the mouth of Gilligan Creek; c)  serpentinites in Section 13 adjacent to Gilligan Creek that are shown on Appendix H, d) belts of greenschist or other lithologies within the Darrington phyllite.
a) the kink banding and isoclinal folding of intervals of Darrington phyllitementioned on p. 3.2-2, b)  the deformed glacial clays shown in the NW/4 section 35, at the mouth of Gilligan Creek; c)  serpentinites in Section 13 adjacent to Gilligan Creek that are shown on Appendix H, d) belts of greenschist or other lithologies within the Darrington phyllite.
ANSWER:
ANSWER:
1269 111
1269 111 INTERROGATORY NO. 36:    Please indicate which geologists mapped which op' rtions of the area of Figure 3.2-2 and when each mapping project was conducted.
 
. .
INTERROGATORY NO. 36:    Please indicate which geologists mapped which op' rtions of the area of Figure 3.2-2 and when each mapping project was conducted.
ANSWER:
ANSWER:
1269 112
1269 112 INTERROGATORY NO. 36:  A comparison of Figure 3.2-2 and 3.2-5 indicates that the lineation labled 4 in Section 31 (in the upper Bear Creek drainage) is not coincident with the edge off the Bear Creek slide as stated in the Explanatiion to Figure 3.2-5. Please provide another explanation for this lineation.
 
,  .
  .
INTERROGATORY NO. 36:  A comparison of Figure 3.2-2 and 3.2-5 indicates that the lineation labled 4 in Section 31 (in the upper Bear Creek drainage) is not coincident with the edge off the Bear Creek slide as stated in the Explanatiion to Figure 3.2-5. Please provide another explanation for this lineation.
ANSWER:
ANSWER:
INTERROG ATORY NO. 37:  Please present all figures ia Appendix B (which show ground magnetic lines) at the same scale.as the geological maps with which they are to be used. For example, Figures B-5 and B-6 should be presented at the same scale as Figures 3.2-2 and 3.2-5, Figure B-4 should be at the same scale as Figu re 3.2-10, etc.
INTERROG ATORY NO. 37:  Please present all figures ia Appendix B (which show ground magnetic lines) at the same scale.as the geological maps with which they are to be used. For example, Figures B-5 and B-6 should be presented at the same scale as Figures 3.2-2 and 3.2-5, Figure B-4 should be at the same scale as Figu re 3.2-10, etc.
ANSWER:
ANSWER:
1269    ii3
1269    ii3 INTERROGATORY NO. 38:  With regard to the ground magnetic survey discussed on page 3.2-14, please explain what type of magnetic anomaly was anticipated near the mouth of Gilligan Creek where Darrington phyllite would be f aulted agains t Dar-rington phyllite according to the Whetten Interpretation of Figu re 3.1-11.
 
.
INTERROGATORY NO. 38:  With regard to the ground magnetic survey discussed on page 3.2-14, please explain what type of magnetic anomaly was anticipated near the mouth of Gilligan Creek where Darrington phyllite would be f aulted agains t Dar-rington phyllite according to the Whetten Interpretation of Figu re 3.1-11.
With regard 'to the anomalies detected near the mouth of Gilligan Creek, they are reported to be related to terrain effects or other near surface features (pages 3.2-14 and B-7).
With regard 'to the anomalies detected near the mouth of Gilligan Creek, they are reported to be related to terrain effects or other near surface features (pages 3.2-14 and B-7).
Please explain what these other near-surface features are and where they are on specific traverses.
Please explain what these other near-surface features are and where they are on specific traverses.
ANSWER:
ANSWER:
                  .
INTERROGATORY NO. 39:  With regard to the gravity survey across the mouth of Gilligan Creek mentioned on page 3.2-14, please indicate the depth to bedrock beneath isogals 32 and 29 (at the edge of the Skagit River) and calculate the maximum 1269 114
INTERROGATORY NO. 39:  With regard to the gravity survey across the mouth of Gilligan Creek mentioned on page 3.2-14, please indicate the depth to bedrock beneath isogals 32 and 29 (at the edge of the Skagit River) and calculate the maximum 1269 114


  .
,
offset that could occur in the bedrock at those depths that would remain undetected by the gravity survey.
offset that could occur in the bedrock at those depths that would remain undetected by the gravity survey.
ANSWER:
ANSWER:
                  .
INTERROGATORY NO. 40:  Figu res 3.2-10, 3.1-17 andk 3.4.3-1 are almos t identical in scale and show the same geological units, but within their area of overlap they differf somewhat.
INTERROGATORY NO. 40:  Figu res 3.2-10, 3.1-17 andk 3.4.3-1 are almos t identical in scale and show the same geological units, but within their area of overlap they differf somewhat.
Please combine these three maps into a single map a.t a scale of approximately 1:24,000 and indicate which of the three current maps is pref erred and why.
Please combine these three maps into a single map a.t a scale of approximately 1:24,000 and indicate which of the three current maps is pref erred and why.
AN SWE R:
AN SWE R:
1269  i15
1269  i15 INTERROGATORY NO. 41:  With regard to the shear zone men-tioned at the bottom of page 3.2-17, where in figure 3.2-10 are the overlying Chuckanut strata along the strike of this shear that the shear allegedly does not cut?
 
.
  ,
INTERROGATORY NO. 41:  With regard to the shear zone men-tioned at the bottom of page 3.2-17, where in figure 3.2-10 are the overlying Chuckanut strata along the strike of this shear that the shear allegedly does not cut?
If these strata are beyond the limits of Figure 3.2-10, please enlarge the areal extent of Figure 3.2-10 to include the Chuckanut strata.
If these strata are beyond the limits of Figure 3.2-10, please enlarge the areal extent of Figure 3.2-10 to include the Chuckanut strata.
ANSWER:
ANSWER:
                  .
INTERROGATORY NO. 42:  With regard to the ground magnetic survey discussed in section 3.2.5.4 on page 3.2-18, please ex-plain what type of magnetic anomaly was anticipated near the mouth of Day Creek where Darrington phyllite would be faulted against Darrington phyllite.
INTERROGATORY NO. 42:  With regard to the ground magnetic survey discussed in section 3.2.5.4 on page 3.2-18, please ex-plain what type of magnetic anomaly was anticipated near the mouth of Day Creek where Darrington phyllite would be faulted against Darrington phyllite.
ANSWER:
ANSWER:
1269 116
1269 116 INTERROGATORY NO. 43:  Please indicate the thickness of unconsolidated sediments over bedrock along the traverse shown in Figure B-4 and evaluate the ef fect of this variable thickness on the profiles shown.
 
.
INTERROGATORY NO. 43:  Please indicate the thickness of unconsolidated sediments over bedrock along the traverse shown in Figure B-4 and evaluate the ef fect of this variable thickness on the profiles shown.
ANSWER:
ANSWER:
INTERROG4 TORY NO. 44:  Please indicate on the map compiled f com Figures 3,1-17, 3.2-10, and 3.4.3-1 (as requested in In-terrogatories No. 8 and 40 15), or on an overlay at the same scale, the location of the flight lines of the LKB aeromagnetic survey that are shown in Figure 17 of Appendix A.
INTERROG4 TORY NO. 44:  Please indicate on the map compiled f com Figures 3,1-17, 3.2-10, and 3.4.3-1 (as requested in In-terrogatories No. 8 and 40 15), or on an overlay at the same scale, the location of the flight lines of the LKB aeromagnetic survey that are shown in Figure 17 of Appendix A.
In addition, please show on the map compiled from the above figures (or on an overlay at the same scale) the location of the ground magnetic surveys shown in Figare B-1.
In addition, please show on the map compiled from the above figures (or on an overlay at the same scale) the location of the ground magnetic surveys shown in Figare B-1.
ANSWER:
ANSWER:
                                                   \269  \\7
                                                   \269  \\7 INTERROGATORY NO. 45:  Please provide all of the ground mag-netic profiles indicated on Figure B-1 that are not currently included in Appendix B. Please draf t these profiles at the same scale as the larges t scale geological maps available (or as overlays for these maps).
 
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INTERROGATORY NO. 45:  Please provide all of the ground mag-netic profiles indicated on Figure B-1 that are not currently included in Appendix B. Please draf t these profiles at the same scale as the larges t scale geological maps available (or as overlays for these maps).
ANSWER:
ANSWER:
INTERROG ATORY NO. 46:  In the gravity survey mentioned on page 3.2-18, please indicate the depth to bedrock beneath isogals 28 to 34 where they cross Day Creek and calculate the maximum offset in the bedrock at those deptb- -hat would remain undetec-ted by the gravity survey.
INTERROG ATORY NO. 46:  In the gravity survey mentioned on page 3.2-18, please indicate the depth to bedrock beneath isogals 28 to 34 where they cross Day Creek and calculate the maximum offset in the bedrock at those deptb- -hat would remain undetec-ted by the gravity survey.
ANSWER:
ANSWER:
1269 118
1269 118 INTERROGATORY NO. 47:  Please provide the following infor-mation on each of the aeromagnetic highs (except Butter Hill and South Chuckanu t Mountain) with more than 100 gammas of closure on that part of Appendix I southwest of a northwesterly line drawn through the southwestern part of the town of Sedro Woolley:
 
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INTERROGATORY NO. 47:  Please provide the following infor-mation on each of the aeromagnetic highs (except Butter Hill and South Chuckanu t Mountain) with more than 100 gammas of closure on that part of Appendix I southwest of a northwesterly line drawn through the southwestern part of the town of Sedro Woolley:
a) the composition, depth, and orientation of alternative models for the causitive bodies, b)  maps similar to 22B, 22C, 23B, 23C, 23D of appendix A for the observed high and for the alternative models of each high.
a) the composition, depth, and orientation of alternative models for the causitive bodies, b)  maps similar to 22B, 22C, 23B, 23C, 23D of appendix A for the observed high and for the alternative models of each high.
NNSWER:
NNSWER:
                  .
REQUEST DDR PRODUCTION NO. 6:  On page 3.4.1-2 and on Figure 3.1-4 personal communications are attributed to Peter Misch.
REQUEST DDR PRODUCTION NO. 6:  On page 3.4.1-2 and on Figure 3.1-4 personal communications are attributed to Peter Misch.
Please provide the follow information:
Please provide the follow information:
a)  the person to whom each personal communication was addressed, b)  the date of each personal communication, c)  the text of this communication if it was written, and d)  if the text of the communication was not written, please have Peter Micch write an appropriate text that also includes the evidence fc  his conclusions.
a)  the person to whom each personal communication was addressed, b)  the date of each personal communication, c)  the text of this communication if it was written, and d)  if the text of the communication was not written, please have Peter Micch write an appropriate text that also includes the evidence fc  his conclusions.
I269 119
I269 119 ANSWER:
 
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ANSWER:
INTERROGATORY NO. 48:  Please show on Figures 3.4.1-1, 3.4-2, or 3.4.1-3 the linear features that are discussed on page 3.4.1-3.
INTERROGATORY NO. 48:  Please show on Figures 3.4.1-1, 3.4-2, or 3.4.1-3 the linear features that are discussed on page 3.4.1-3.
ANSWER:
ANSWER:
                .
e 1269 120 REQUEST FOR PRODUCTION NO. 7:  Please provide the field notes, field maps, and compilation of maps of the geological mapping mentioned on page 3.4.13 as having been done for the 1978-1979 s tudy. Please name all of the persons who conducted this mapping.
e 1269 120
 
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REQUEST FOR PRODUCTION NO. 7:  Please provide the field notes, field maps, and compilation of maps of the geological mapping mentioned on page 3.4.13 as having been done for the 1978-1979 s tudy. Please name all of the persons who conducted this mapping.
REQUEST FOR PRODUCTION NO. 8:  Please provide the log of the telephone call of April, 1978 to Dr. Peter Ward (see pages 2.4.1-5 to 3.4.1-6).
REQUEST FOR PRODUCTION NO. 8:  Please provide the log of the telephone call of April, 1978 to Dr. Peter Ward (see pages 2.4.1-5 to 3.4.1-6).
INTERROGATORY NO. 49:  With regard to the geology of the No Name Creek area depicted in Appendix H and Figure 3.4.3-1, please describe the following:
INTERROGATORY NO. 49:  With regard to the geology of the No Name Creek area depicted in Appendix H and Figure 3.4.3-1, please describe the following:
Line 405: Line 236:
(d)  any faults other than the Shuksan thrust were recog-nized, and (e)  whether any attempt was made to trace any of the fea-tures described in (a), (b), (c), or (d) along strike away f rom No Name Creek.
(d)  any faults other than the Shuksan thrust were recog-nized, and (e)  whether any attempt was made to trace any of the fea-tures described in (a), (b), (c), or (d) along strike away f rom No Name Creek.
AN SWER:
AN SWER:
                                                             }2bh
                                                             }2bh INTERROGATORY NO. 50:    Page 3.4.2-4 states that " Surface sediments have been incorporated into the flow complicating the internal structure. . . No shearing or slikensides were found in the andesite dike-rock which constitutes the bulk of the knob, in which the sheared flow rock occurs."
 
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INTERROGATORY NO. 50:    Page 3.4.2-4 states that " Surface sediments have been incorporated into the flow complicating the internal structure. . . No shearing or slikensides were found in the andesite dike-rock which constitutes the bulk of the knob, in which the sheared flow rock occurs."
Does this description include the nob of volcanic rock la-beled "Ev" shown near the center of Section 14, T 33N, RSE?      If not, please identify the location of the knob described above.
Does this description include the nob of volcanic rock la-beled "Ev" shown near the center of Section 14, T 33N, RSE?      If not, please identify the location of the knob described above.
ANSWER:
ANSWER:
                      .
INTERROGATORY NO. 51:    Please explain the significance of the following features that occur in the knob of volcanic rock in Section 14, T 33N, RSE:
INTERROGATORY NO. 51:    Please explain the significance of the following features that occur in the knob of volcanic rock in Section 14, T 33N, RSE:
(a)  the large slickensided joint that strikes approximately N30*W and dips approximately 70*NE near the top of the quarry, (b)  the tectonic lens of volcanic rock bounded by sheared argillite near the top of the talus in the western part of the quarry (the shear bounding the upper part of the lens strikes about N3 0*W and dips about 3 0* NE, (c)  the shear that strikes about N20* E and dips about 50' NE across the eastern part of the quarry, and
(a)  the large slickensided joint that strikes approximately N30*W and dips approximately 70*NE near the top of the quarry, (b)  the tectonic lens of volcanic rock bounded by sheared argillite near the top of the talus in the western part of the quarry (the shear bounding the upper part of the lens strikes about N3 0*W and dips about 3 0* NE, (c)  the shear that strikes about N20* E and dips about 50' NE across the eastern part of the quarry, and
                                                       }2b9
                                                       }2b9


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                                    .
(d)  the pervasive fracturing and local hydrothermal altera-tion of the rocks in the quarry.
(d)  the pervasive fracturing and local hydrothermal altera-tion of the rocks in the quarry.
AN SWER:
AN SWER:
Line 429: Line 251:
N4 SWE R:
N4 SWE R:
                                                               }}{g  }}}
                                                               }}{g  }}}
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INTERROGATORY NO. 53:  Page 3.4.1-9 s tates that Bechtel con-ducted mapping in the San Juan Islands. Please provide the fol-lcring:
INTERROGATORY NO. 53:  Page 3.4.1-9 s tates that Bechtel con-ducted mapping in the San Juan Islands. Please provide the fol-lcring:
a)  the names of all geologists (including paleontologists) involved in the mapping, b)  the paleontological and lithological criteria for iden-tifying each of the formations that were mapped or studied, and c)  the names of any paleontologists that advised the Appl-cant in any way.
a)  the names of all geologists (including paleontologists) involved in the mapping, b)  the paleontological and lithological criteria for iden-tifying each of the formations that were mapped or studied, and c)  the names of any paleontologists that advised the Appl-cant in any way.
Line 437: Line 257:
INTERROGATORY NO. 54:  On pages 3.4.1-8 to 3.4 1-10 and on Figure 3.4.1-5 a number of authorities are cited on the a 'naimo strata and the Chuckanu t formation. These include the Bechtel n
INTERROGATORY NO. 54:  On pages 3.4.1-8 to 3.4 1-10 and on Figure 3.4.1-5 a number of authorities are cited on the a 'naimo strata and the Chuckanu t formation. These include the Bechtel n


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employees to be named in the foregoing interrogatory and the following consultants to the Applicants:  Miller, Misch, Vance, and Easterbrook.
employees to be named in the foregoing interrogatory and the following consultants to the Applicants:  Miller, Misch, Vance, and Easterbrook.
Plea 3e have each of these authorities provide in writing:
Plea 3e have each of these authorities provide in writing:
(a) both the paleontological and the lithological cri-teria that they use for correlating the Chuckanut forma-
(a) both the paleontological and the lithological cri-teria that they use for correlating the Chuckanut forma-tion with any part of the Nanaimo group, (b) Their reasons for disputing any of the correlations attributed to Ward in Section 3.4.1.3 or made by him in his letter of 5 December 1977, or in his 1978 article, and (c) their evaluation of Ward's assertion in his letter 5 December 1977 that "... there has never been any discovery of Nanaimo fossils on. the mainland of British Columbia or in Washignton S tate. The report of Mathews (1958 of Inoversamus schmidti from Mt. Garibaldi was a misidenti-fication..."
    ,
tion with any part of the Nanaimo group, (b) Their reasons for disputing any of the correlations attributed to Ward in Section 3.4.1.3 or made by him in his letter of 5 December 1977, or in his 1978 article, and (c) their evaluation of Ward's assertion in his letter 5 December 1977 that "... there has never been any discovery of Nanaimo fossils on. the mainland of British Columbia or in Washignton S tate. The report of Mathews (1958 of Inoversamus schmidti from Mt. Garibaldi was a misidenti-fication..."
ANSWER:
ANSWER:
                    .
1269 125 tLU    6L f
1269 125 tLU    6L f


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INTERROGATORY NO. 55:  Pages 3.4.1-10 and 3.4.1-11 and Fi-gu re 3.4.1-4 imply that the Chuckanut formation is coeval and on strike with the Gabriola formation. Please discuss all possible structural implications .of these relationships, especially if these formations are correlative (coeval) but not equivalent.
INTERROGATORY NO. 55:  Pages 3.4.1-10 and 3.4.1-11 and Fi-gu re 3.4.1-4 imply that the Chuckanut formation is coeval and on strike with the Gabriola formation. Please discuss all possible structural implications .of these relationships, especially if these formations are correlative (coeval) but not equivalent.
ANSWER:
ANSWER:
                            .
INTERROGATORY NO. 56:  Please describe any instrumental methods that were used to determine the altitudes of any corre-lative strandlines (see page 3.4.1-15). Please provide the names of the persons who performed these instrumental determin-ations.
INTERROGATORY NO. 56:  Please describe any instrumental methods that were used to determine the altitudes of any corre-
                    '
lative strandlines (see page 3.4.1-15). Please provide the names of the persons who performed these instrumental determin-ations.
Please provide references to any publication or report that cites any instance in which the altitudes of correlative strandlines have been ins trumentally determined within an error less than 10 feet.
Please provide references to any publication or report that cites any instance in which the altitudes of correlative strandlines have been ins trumentally determined within an error less than 10 feet.
ANSWER:
ANSWER:
1269 126
1269 126 INTERROGATORY NO. 57:    With regard to Appendix H, please explain the following:
 
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INTERROGATORY NO. 57:    With regard to Appendix H, please
-
explain the following:
a) the criteria for including the Tertiary units in T 33 N west of Interstate 5 within the Chuckanut formation, b)    the reason for reversing the barbs on the thrust fault shown by Schmidt (1972) on south Chuckanut Mountain, especially as the photograph he labels Figure 20 shows Yellow Aster complex over phyllite, c)    the location of unit Mn (which is listed under "Geo-logic Units" on the explanation to Appendix H) .
a) the criteria for including the Tertiary units in T 33 N west of Interstate 5 within the Chuckanut formation, b)    the reason for reversing the barbs on the thrust fault shown by Schmidt (1972) on south Chuckanut Mountain, especially as the photograph he labels Figure 20 shows Yellow Aster complex over phyllite, c)    the location of unit Mn (which is listed under "Geo-logic Units" on the explanation to Appendix H) .
d)    the reason for the omission of the fault that trends southeasterly from Chuckanut Bay through Chuckanut strata and which is shown on Figure 3.1-3, Figure 2 of Miller and Misch (1963), and Figure 2.5-4b of Amendment No. 19 of the PSAR).
d)    the reason for the omission of the fault that trends southeasterly from Chuckanut Bay through Chuckanut strata and which is shown on Figure 3.1-3, Figure 2 of Miller and Misch (1963), and Figure 2.5-4b of Amendment No. 19 of the PSAR).
e)  why the areas of outcrop of the Chilliwack group rocks north of the confluence of Rocky and Day creeks and of Chuckanut strata north of Day Lake that are shown in Figure 3.1-3 are not shown, f)  why the ridge to southwest of the upper portion of Day Creek (near Day Lake) is shown as Church Mountain thrust plate but is shown as being underlain by rocks of the Shuksan plate in Figure 3.1-3, g)  why the outline of the alleged Shuksan thrust near Table Mountain is substantially different than as shown on Figu re 3.1-3.
e)  why the areas of outcrop of the Chilliwack group rocks north of the confluence of Rocky and Day creeks and of Chuckanut strata north of Day Lake that are shown in Figure 3.1-3 are not shown, f)  why the ridge to southwest of the upper portion of Day Creek (near Day Lake) is shown as Church Mountain thrust plate but is shown as being underlain by rocks of the Shuksan plate in Figure 3.1-3, g)  why the outline of the alleged Shuksan thrust near Table Mountain is substantially different than as shown on Figu re 3.1-3.
h)  why in the vicinity of Devils Mountain map unit Ev appears to be in contact with (and presumably overlies) the Chuck anu t forma tion; whereas on Figure 3.1-3 what appears to the the same " Eocene silicic volcanic and sedimentary rocks" are in contact with rocks of the Chuch Mountain plate, i)  why the contact between rocks of the Shuksan Plate and Chuckanut strata is shown as a depositional one in section 17, T 33 N, R 7 E; whereas in Figure 3.1-3 the same contact is shown as a fault, j)  why the rocks in the NW corner of Section 18, T 33 N, R 7 E are thought to be Tertiary grantic rocks; wht eas in Figu re 3.1-3 these are shown as rocks of the Church Moun-tain plate, 1269 127
h)  why in the vicinity of Devils Mountain map unit Ev appears to be in contact with (and presumably overlies) the Chuck anu t forma tion; whereas on Figure 3.1-3 what appears to the the same " Eocene silicic volcanic and sedimentary rocks" are in contact with rocks of the Chuch Mountain plate, i)  why the contact between rocks of the Shuksan Plate and Chuckanut strata is shown as a depositional one in section 17, T 33 N, R 7 E; whereas in Figure 3.1-3 the same contact is shown as a fault, j)  why the rocks in the NW corner of Section 18, T 33 N, R 7 E are thought to be Tertiary grantic rocks; wht eas in Figu re 3.1-3 these are shown as rocks of the Church Moun-tain plate, 1269 127 k)  the distinctive nature of the descriptions of the cutt-ings at a depth of 700 feet in the well i.n section 32, T 36 N, R4E that permit the rocks to be identified as Darrington phyllite rather than pelitic rocks within the Chilliwack group or within the San Juan rocks,
 
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k)  the distinctive nature of the descriptions of the cutt-ings at a depth of 700 feet in the well i.n section 32, T 36 N, R4E that permit the rocks to be identified as Darrington phyllite rather than pelitic rocks within the Chilliwack group or within the San Juan rocks,
: 1) why the area of outcrop of greens tones anc' serpentin-ites on the northwestern side of Lyman Mountain and at Mt.
: 1) why the area of outcrop of greens tones anc' serpentin-ites on the northwestern side of Lyman Mountain and at Mt.
Josephine are so much smaller than as shown in Figure 3.1-3, and m)  the tectonic significance of serpentinite mapped within the Chuckanut formation.
Josephine are so much smaller than as shown in Figure 3.1-3, and m)  the tectonic significance of serpentinite mapped within the Chuckanut formation.
Line 482: Line 278:
Rather than submitting a written answer to some portions of this interrogatory, it may be si;npler to revise Appendix H (as is also suggested in Interrogatory No. 58) and then to note that the answers to specific parts of this inter-rogatory can be found on the revised map.
Rather than submitting a written answer to some portions of this interrogatory, it may be si;npler to revise Appendix H (as is also suggested in Interrogatory No. 58) and then to note that the answers to specific parts of this inter-rogatory can be found on the revised map.
ANSWER:
ANSWER:
                    .
1269 128 INTERROGATORY NO. 58:  With respect to Appendix H, please show or provide the following:
1269 128
 
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INTERROGATORY NO. 58:  With respect to Appendix H, please show or provide the following:
a)  formational labels for the following outcrops or units:
a)  formational labels for the following outcrops or units:
Portion of                          Township        Range Section              Section        North            East
Portion of                          Township        Range Section              Section        North            East
Line 521: Line 312:
: 29.                      9& 10          32              5
: 29.                      9& 10          32              5
: 30.                    28 & 33          33              5
: 30.                    28 & 33          33              5
: 31. NW SW                10            33              7 b) how the queried contacts in S~ections 19 and 30 of T 33 Range 8 E continue to the east, c) resolutions of discrepancies between the present ver-sion of Appendix H and other geological maps in the 1978-1979 report,
: 31. NW SW                10            33              7 b) how the queried contacts in S~ections 19 and 30 of T 33 Range 8 E continue to the east, c) resolutions of discrepancies between the present ver-sion of Appendix H and other geological maps in the 1978-1979 report, d)  delineation of the Darrington phyllite from the Shuksan greenschist within the Shuksan thrust plate. Note that pages 3.1-25 to 3.1-26 state that the greenschist "is mapped generally in the southeast part of the map area (see the geologic map in appendix H)". Note also that the greenschist is shown on the smaller scale map of Figure 3.1-3 (Sheet 1) and also is shown by Morrison .(1977) and Wilson (1978).
 
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d)  delineation of the Darrington phyllite from the Shuksan greenschist within the Shuksan thrust plate. Note that pages 3.1-25 to 3.1-26 state that the greenschist "is mapped generally in the southeast part of the map area (see the geologic map in appendix H)". Note also that the greenschist is shown on the smaller scale map of Figure 3.1-3 (Sheet 1) and also is shown by Morrison .(1977) and Wilson (1978).
Thus, this information must be available. This portion of this inte rroga tory , therefore, also applies to the 1:24,000 Map of the bedrock requested in previous interrogatories).
Thus, this information must be available. This portion of this inte rroga tory , therefore, also applies to the 1:24,000 Map of the bedrock requested in previous interrogatories).
e)  delineation of the Chilliwack group roe'cs from Mesozoic rocks, especially Mesozoic rocks of San Juan af finities, in the alleged Church Mountain thrust plate (this portion of this interrogatory probably also applies to the 1:24,000 map of the bedrock requested in previous interrogatories) f)  delineation of " Tectonic slices of metaplutonic rocks, Pre-Dev. - Mesozoic (?)" from other rocks of the alleged Church Mountain thrust ~ plate as is done in the smaller scale map of Figure 3.1-3 and by Miller (1979, in, press).
e)  delineation of the Chilliwack group roe'cs from Mesozoic rocks, especially Mesozoic rocks of San Juan af finities, in the alleged Church Mountain thrust plate (this portion of this interrogatory probably also applies to the 1:24,000 map of the bedrock requested in previous interrogatories) f)  delineation of " Tectonic slices of metaplutonic rocks, Pre-Dev. - Mesozoic (?)" from other rocks of the alleged Church Mountain thrust ~ plate as is done in the smaller scale map of Figure 3.1-3 and by Miller (1979, in, press).
g)  the position of the greenschist belt which page E-19 States that " Field observations indicate that the belt is probably bounded by tectonic contacts. . . Geologic Map, Appendix H) . "
g)  the position of the greenschist belt which page E-19 States that " Field observations indicate that the belt is probably bounded by tectonic contacts. . . Geologic Map, Appendix H) . "
ANSWER i269 130
ANSWER i269 130 T    1 4
 
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T    1 4
INTERROGATORY NO. 59:  In Appendix D Miller states that "All of the structures can be related to either the mid-Cretaceous or Eocene orogenies...", but in the preprint of his paper entitled
INTERROGATORY NO. 59:  In Appendix D Miller states that "All of the structures can be related to either the mid-Cretaceous or Eocene orogenies...", but in the preprint of his paper entitled
         " Western extent of the Shuksan and Church Mountain Thrust Plates" he states (p. 3) clastic deposition "was followed by mild folding and f aulting of probable Miocene and younger age. "
         " Western extent of the Shuksan and Church Mountain Thrust Plates" he states (p. 3) clastic deposition "was followed by mild folding and f aulting of probable Miocene and younger age. "
Please explain what appears to be a contradiction in these two statements.
Please explain what appears to be a contradiction in these two statements.
ANSWER:
ANSWER:
                      .
INTERROGATORY NO. 60:  Please explain the following apparent anomalies on Figure 3.1-3 and make any corrections to Appendix H that may be required by these explanations:
INTERROGATORY NO. 60:  Please explain the following apparent anomalies on Figure 3.1-3 and make any corrections to Appendix H that may be required by these explanations:
a)  the apparent thrusting of the Church Mountain plate over the Shuksan greenschist in the area adjacent to the north-eastern border of Sheet 2, b) the repetition of the Shuksan thrust east of Deer Creek on Sheet 2 1269 131
a)  the apparent thrusting of the Church Mountain plate over the Shuksan greenschist in the area adjacent to the north-eastern border of Sheet 2, b) the repetition of the Shuksan thrust east of Deer Creek on Sheet 2 1269 131


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c)  the curved traces of the f aults that bound the Church Mountain rocks at Mt. Josephine (such a configuration would seem to preclude a hors t, and barbs are needed if these faults are imbric~ ate thrusts).
c)  the curved traces of the f aults that bound the Church Mountain rocks at Mt. Josephine (such a configuration would seem to preclude a hors t, and barbs are needed if these faults are imbric~ ate thrusts).
ANSWER:
ANSWER:
                                                        .
INTERROGATORY NO. 61:    Page 3.4.2-3 states that geologic mapping has be~en done by Bechtel geologists in Walker Valley since April 1978. Please name all persons who conducted this mapping and describe their geographic and geological areas of responsibility.
INTERROGATORY NO. 61:    Page 3.4.2-3 states that geologic mapping has be~en done by Bechtel geologists in Walker Valley since April 1978. Please name all persons who conducted this mapping and describe their geographic and geological areas of responsibility.
ANSWER:
ANSWER:
REQUEST P3R PRODUCTION NO. 10:    Please provide the field notes, field maps, compilation maps and other documents pro-1269 132
REQUEST P3R PRODUCTION NO. 10:    Please provide the field notes, field maps, compilation maps and other documents pro-1269 132 4
 
4
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duced during the geologic mapping ntoed in Interrogatory 1;o. 61.
duced during the geologic mapping ntoed in Interrogatory 1;o. 61.
INTERROG ATORY NO. 62:  Please submit a sufficiently de-tailed geological map on a scale of 1:24,000 or greater that will verify the following statements:
INTERROG ATORY NO. 62:  Please submit a sufficiently de-tailed geological map on a scale of 1:24,000 or greater that will verify the following statements:
Line 568: Line 344:
In addition, Aero Service Aeromagnetic Sheet 1 (proprietary Figure 8 of Appendix A) with the location of the flight lines indicated upon it is requested as an overlay to the geological 1269 133
In addition, Aero Service Aeromagnetic Sheet 1 (proprietary Figure 8 of Appendix A) with the location of the flight lines indicated upon it is requested as an overlay to the geological 1269 133


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map of this area in order to verify the discussion of the fol-lowing on p. 3.4.2-5:
map of this area in order to verify the discussion of the fol-lowing on p. 3.4.2-5:
h)  the coincidence of a sinuous aeromagnetic gradient with Lovseth 's N 3 0*  fault, and i)  the coincidence of Lovseth and Jenkin's N 70* W fault with the strong N 60 to 70* W gradient (The discus-sion of the aeromagnetic patterns mentioned in (h) and (i) should include calculated models to evaluate the depth, composition, and orientation of the causitive bodies, including the possibility that the N 70* fault is not as steep as Lovseth inferred),
h)  the coincidence of a sinuous aeromagnetic gradient with Lovseth 's N 3 0*  fault, and i)  the coincidence of Lovseth and Jenkin's N 70* W fault with the strong N 60 to 70* W gradient (The discus-sion of the aeromagnetic patterns mentioned in (h) and (i) should include calculated models to evaluate the depth, composition, and orientation of the causitive bodies, including the possibility that the N 70* fault is not as steep as Lovseth inferred),
j)  the lack of any interruption of the isogammas along the Devil's Mountain f ault on striike with the N 30' W trend In addition, Amendment No. 19 of the PSAR includes a report by Harding-Lawson Associates on ground-based gravity and magnetic surveys in this area.      This information should be discussed, the location of traverses shown on the overlay requested above, and the profiles o'f Harding and Lawson should be presented at a sale of 1:24,000.
j)  the lack of any interruption of the isogammas along the Devil's Mountain f ault on striike with the N 30' W trend In addition, Amendment No. 19 of the PSAR includes a report by Harding-Lawson Associates on ground-based gravity and magnetic surveys in this area.      This information should be discussed, the location of traverses shown on the overlay requested above, and the profiles o'f Harding and Lawson should be presented at a sale of 1:24,000.
AN SWER:
AN SWER:
1269 134
1269 134 INTERROGATORY NO. 63:  Please show Figure 3.4.3-2 at the same scale as the map and cross sections requested in Interroga-tory No. 8. Do not make any portion of the cross section diagramtic. Show the Darrington phyllite and the Shuksan greenschist as separate units. Show any other units that the respons es to . Interrogatories No. 8 and 57(e) indicate to be present.
                            .
 
    -
.    .
  .
INTERROGATORY NO. 63:  Please show Figure 3.4.3-2 at the same scale as the map and cross sections requested in Interroga-tory No. 8. Do not make any portion of the cross section diagramtic. Show the Darrington phyllite and the Shuksan greenschist as separate units. Show any other units that the respons es to . Interrogatories No. 8 and 57(e) indicate to be present.
ANSWER:
ANSWER:
                      .
INTERROGATORY NO. 64:  Page 3.4.3-7 points ou t that the PSAR concludes that the " anti-slope scarps" or "sackung" f eatures along the S traight Creek f ault are not of tectonic origin.
INTERROGATORY NO. 64:  Page 3.4.3-7 points ou t that the PSAR concludes that the " anti-slope scarps" or "sackung" f eatures along the S traight Creek f ault are not of tectonic origin.
Howeve r, McClearly, Dohrenwend, Cluff, and Hanson (1978, Straight Creek Fault study zone, a report prepared by Woodward-Clyde Consultants for United Engineers and Cons tructors, INc., as part ,
Howeve r, McClearly, Dohrenwend, Cluff, and Hanson (1978, Straight Creek Fault study zone, a report prepared by Woodward-Clyde Consultants for United Engineers and Cons tructors, INc., as part ,
of the WPPSS study of the 1872 earthquake, 72 p.) tentatively came to the opposite conclusion. Please evaluate each piece of 1269 135
of the WPPSS study of the 1872 earthquake, 72 p.) tentatively came to the opposite conclusion. Please evaluate each piece of 1269 135


    .
.    .
  .
evidence that McClearly, et al. tentatively advance in favor of a.
evidence that McClearly, et al. tentatively advance in favor of a.
                                                                           ~
                                                                           ~
tectonic origin, and document where Bechtel's evidence is more extensive and more definitive that than of McClearly, et al.
tectonic origin, and document where Bechtel's evidence is more extensive and more definitive that than of McClearly, et al.
AN SWER:
AN SWER:
                      .
INTERROGATORY NO. 65:  Assuming for the moment that the "sackung" features described in section 3.4.3 are tectonically induced, to what known or hypothesized f aults could they be related?
INTERROGATORY NO. 65:  Assuming for the moment that the "sackung" features described in section 3.4.3 are tectonically induced, to what known or hypothesized f aults could they be related?
ANSWER:
ANSWER:
1269 136
1269 136 s
 
s
.    .
  .
INTERROGATORY NO. 66:  According to page 3.5-4 and page 52 of Appendix A, Anomaly #5 is caused by a 15 to 20 foot thick ferruginous schist (hereinafter referred to as a banded iron formation or BIF) at or ner the surface, and Anomaly #3 is caused by a similar body. Please explain the following:
INTERROGATORY NO. 66:  According to page 3.5-4 and page 52 of Appendix A, Anomaly #5 is caused by a 15 to 20 foot thick ferruginous schist (hereinafter referred to as a banded iron formation or BIF) at or ner the surface, and Anomaly #3 is caused by a similar body. Please explain the following:
a) where EDCON's report states that the causitive body of Anomaly # 3 plunges from 500 feet to 4000 feet below the surface (see page 3.4-4),
a) where EDCON's report states that the causitive body of Anomaly # 3 plunges from 500 feet to 4000 feet below the surface (see page 3.4-4),
Line 608: Line 367:
Because Shedd (1922) and Morrison (1977) indicate that the BIFs are close to the contact between the Darrington phyllite and the Shuksan greenschist, this contact must be mapped to evaluate the hypothesis that a BIF is the causative body. Thus, the area surrounding ths anomaly as well as the contact else-where should be included in the area to be mapped at 1:24,000.
Because Shedd (1922) and Morrison (1977) indicate that the BIFs are close to the contact between the Darrington phyllite and the Shuksan greenschist, this contact must be mapped to evaluate the hypothesis that a BIF is the causative body. Thus, the area surrounding ths anomaly as well as the contact else-where should be included in the area to be mapped at 1:24,000.
AN SWER:
AN SWER:
1269 137
1269 137 INTERROGATORY NO. 67:  If the Devil's Mountain f ault is a southward dipping normal fault as stated on page 3.5-5, how ca.n the "aut.achthonous" rocks below the alleged Church Mountain plate occur at the surf ace on the south side of the f ault; that is, how can structurally lower rocks occur at the surface on the downthrown side of the fault?
 
  .
    .
.
                            .
INTERROGATORY NO. 67:  If the Devil's Mountain f ault is a southward dipping normal fault as stated on page 3.5-5, how ca.n the "aut.achthonous" rocks below the alleged Church Mountain plate occur at the surf ace on the south side of the f ault; that is, how can structurally lower rocks occur at the surface on the downthrown side of the fault?
ANSWER:
ANSWER:
1269 138
1269 138 INTERROGATORY NO. 68:            Please provide an explantion for the following relative to the Devils Mountain f ault:
 
  .
    .
.
INTERROGATORY NO. 68:            Please provide an explantion for the following relative to the Devils Mountain f ault:
a)    why the aeromagnetic anomalies bend southeastward as they approach the fault from the north (see Appendix I) b)    why lineations bend southeastward as they approach the fault from the north (see Figure 3.2-6) and c) why the " autochthonous" rocks south of the fault bend northwestward as they approach the f ault from the sou th ( s ee F igu re 3 .1-3 ) .
a)    why the aeromagnetic anomalies bend southeastward as they approach the fault from the north (see Appendix I) b)    why lineations bend southeastward as they approach the fault from the north (see Figure 3.2-6) and c) why the " autochthonous" rocks south of the fault bend northwestward as they approach the f ault from the sou th ( s ee F igu re 3 .1-3 ) .
ANSWER:
ANSWER:
                        .
INTERROGATORY NO. 69:            Please explain the ways in which the gravity survey described in Appendix C is superior to the one conducted by Smith and Foxhall (1976, Appendix 2M, Amendment No. 11 of the PSAR), and, conve rs ely , the aspects of the survey by Smith and Foxhall that are superior.
INTERROGATORY NO. 69:            Please explain the ways in which the gravity survey described in Appendix C is superior to the one conducted by Smith and Foxhall (1976, Appendix 2M, Amendment No. 11 of the PSAR), and, conve rs ely , the aspects of the survey by Smith and Foxhall that are superior.
Explain whether it is practical or not to combine the re-sults of these two surveys into a single map.
Explain whether it is practical or not to combine the re-sults of these two surveys into a single map.
ANSWER:
ANSWER:
1269 139
1269 139 INTERROGATORY NO. 70:  Please include the results of Easter-brook's study of 3 April 1979 in Appendix D on the previously re-questei 1:24,000 map of glacial sediments.
 
    .
.    .
  .
INTERROGATORY NO. 70:  Please include the results of Easter-brook's study of 3 April 1979 in Appendix D on the previously re-questei 1:24,000 map of glacial sediments.
AN3WER:
AN3WER:
                      .
INTERROGATORY No. 71:  The following pertain to the report of Easterbrook in Appendix D dated 3 April 1979. Please explain or provide the following:
INTERROGATORY No. 71:  The following pertain to the report of Easterbrook in Appendix D dated 3 April 1979. Please explain or provide the following:
a) the location on Figure 1 (or other appropriate figures) of the several outcrops that were used to compile the com-posite section shown in Figure 3 (this information could be supplied on the 1:24,000 map of glacial sediments) b) how cuttings from auger holes can be used to determine whether sediments have been overriden by ice.
a) the location on Figure 1 (or other appropriate figures) of the several outcrops that were used to compile the com-posite section shown in Figure 3 (this information could be supplied on the 1:24,000 map of glacial sediments) b) how cuttings from auger holes can be used to determine whether sediments have been overriden by ice.
c)  a discussion of the discrepancies, if any, and the rea-sons for theae discrepancies, between the logs of adjacent USGS and Bechtel auger holes 1269 140
c)  a discussion of the discrepancies, if any, and the rea-sons for theae discrepancies, between the logs of adjacent USGS and Bechtel auger holes 1269 140


    .
.    .
4 d)  the altitude of the collar of each auger hole, e)  Dr. Easterbrook's logs of each hole, f)  the following additions to Figure 4,
4 d)  the altitude of the collar of each auger hole, e)  Dr. Easterbrook's logs of each hole, f)  the following additions to Figure 4,
: 1) an explanation describing the patterns used to describe the various types of sediments in each hole,
: 1) an explanation describing the patterns used to describe the various types of sediments in each hole,
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n) a geological map showing the extent and orientation of the units shown in the composite section (Figure 3) and in Figure 4, o)  Dr. Easterbrook's geological cross section drawn through the drill holes, and any other cross sections he drew through the area of the geological map requested in (n) above, 1269 141
n) a geological map showing the extent and orientation of the units shown in the composite section (Figure 3) and in Figure 4, o)  Dr. Easterbrook's geological cross section drawn through the drill holes, and any other cross sections he drew through the area of the geological map requested in (n) above, 1269 141


    .
.    .
  .
p)  the thickness of the till penetrated in holes 21, 22, 23, and 25 compared to the thickness of the upper till penetrated in holes 1 to 20, q)  the lithological criteria that can be used to dis-tinguish the till encountered in holes 21, 22, 23, and 25 from the till encountered at about 20 feet in holes 1 to 20, and r) a correlation of the sediments below the till penetrated by holes 21, 22, 23, and 25 with the sediments below the till encountered at about 20 feet in holes 1 to 20.
p)  the thickness of the till penetrated in holes 21, 22, 23, and 25 compared to the thickness of the upper till penetrated in holes 1 to 20, q)  the lithological criteria that can be used to dis-tinguish the till encountered in holes 21, 22, 23, and 25 from the till encountered at about 20 feet in holes 1 to 20, and r) a correlation of the sediments below the till penetrated by holes 21, 22, 23, and 25 with the sediments below the till encountered at about 20 feet in holes 1 to 20.
ANSWER:
ANSWER:
                .
1269 142
1269 142


        .
  ,.
<  .
INTERROGATORY NO. 72:    Table F-1 and Figure F-1 do not ade-quately locate the rocks that have been dated.      For example, sample 2 6 reputedly was collected f rom Section 2, T3 3 N, R 7E:
INTERROGATORY NO. 72:    Table F-1 and Figure F-1 do not ade-quately locate the rocks that have been dated.      For example, sample 2 6 reputedly was collected f rom Section 2, T3 3 N, R 7E:
yet no outcrop symbol for a grantic rock occurs in that section on appendix H; so it is difficult to evaluate the significance of the sample and impossible to collect a duplicate sample.
yet no outcrop symbol for a grantic rock occurs in that section on appendix H; so it is difficult to evaluate the significance of the sample and impossible to collect a duplicate sample.
Thus, this interrogatory requests that dated samples be identi-fied on the detailed maps requested in earlier interrogatories.
Thus, this interrogatory requests that dated samples be identi-fied on the detailed maps requested in earlier interrogatories.
ANSWER:
ANSWER:
                    .
INTERROGATORY NO. 73:    Page F 2 states that a search for radiolaria was unsuccessful. Please  indicate which outcrops were investigated, the methods used to search for radiolaria and the names of the persons who collected, processed, and examined the specimens. Please provide the professional qualifications of these persons.
INTERROGATORY NO. 73:    Page F 2 states that a search for radiolaria was unsuccessful. Please  indicate which outcrops were investigated, the methods used to search for radiolaria and the names of the persons who collected, processed, and examined the specimens. Please provide the professional qualifications of these persons.
AN SWER:
AN SWER:
1269 143
1269 143 INTERROGATORY NO. 74 :  With regard to petrographic ex-aminations of the thin sections of dated rocks please provide the following:
 
  '.
.
                  .
INTERROGATORY NO. 74 :  With regard to petrographic ex-aminations of the thin sections of dated rocks please provide the following:
a)  the name of the persons who examined the thin sections, b)  the prof essional qualifications of these persons, c)  the petrographic descriptions of the thin sections.
a)  the name of the persons who examined the thin sections, b)  the prof essional qualifications of these persons, c)  the petrographic descriptions of the thin sections.
The sample numbers of the thin sections range from 1 to 33.
The sample numbers of the thin sections range from 1 to 33.
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                                                 \


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.  -
INTERROGATORY NO. 75:  Please provide the names of the formations f rom which the samples were collected for dating.
INTERROGATORY NO. 75:  Please provide the names of the formations f rom which the samples were collected for dating.
This is done for a few samples in the text, but needs to be done for all samples in Table F-1 and Figure F-2 (or in a single table that includes the formational names, petrographic descriptions, and the information r.aw appearing separately in
This is done for a few samples in the text, but needs to be done for all samples in Table F-1 and Figure F-2 (or in a single table that includes the formational names, petrographic descriptions, and the information r.aw appearing separately in Table F-1 and Figure F-2) .
    .
Table F-1 and Figure F-2) .
ANSWER:
ANSWER:
                      .
                                                                      .
INTERROGATORY NO. 76:  Which of the three samples dis-cussed in Section 4.1.2 is deuterically altered?
INTERROGATORY NO. 76:  Which of the three samples dis-cussed in Section 4.1.2 is deuterically altered?
ANSWER:
ANSWER:
1269 145
1269 145 INTERROGATORY NO. 77:  What are the Eocene volcanic rocks on the San Juan Islands that are referred to on the bottom of page F-9?
 
.
    ',
  .
INTERROGATORY NO. 77:  What are the Eocene volcanic rocks on the San Juan Islands that are referred to on the bottom of page F-9?
                    .
INTERROGATORY NO. 78:  Which of the pre-Tertiary igneous rocks listed in Table F-1 retain enough of their original mineralogy and texture to suggest that K-Ar age may approximate the true age of the rock?  Note that this interrogatory might be satisf actorily answered by a satisf actory response to Interrogatory No. 74-ANSWER:
INTERROGATORY NO. 78:  Which of the pre-Tertiary igneous rocks listed in Table F-1 retain enough of their original mineralogy and texture to suggest that K-Ar age may approximate the true age of the rock?  Note that this interrogatory might be satisf actorily answered by a satisf actory response to Interrogatory No. 74-ANSWER:
1269 146
1269 146 INTERROGATORY NO. 79:  Which of the pre ~1ertiary rocks listed in Table F-1 have been dated by other means by other authors?  If the results of Table 1 and the other authors yield concordant dates, what is the significance of these concordant dates ?
 
    '
,    ,
  .
INTERROGATORY NO. 79:  Which of the pre ~1ertiary rocks listed in Table F-1 have been dated by other means by other authors?  If the results of Table 1 and the other authors yield concordant dates, what is the significance of these concordant dates ?
ANSWER:
ANSWER:
.
INTERROGAITORY NO. 80: With regard to the lithological logs of the drill holes accompanying Appendix G, please supply the following:
INTERROGAITORY NO. 80: With regard to the lithological logs of the drill holes accompanying Appendix G, please supply the following:
a) the names and professional qualfications of the persons who logged each hole (or parts of a hole),
a) the names and professional qualfications of the persons who logged each hole (or parts of a hole),
Line 713: Line 421:
c) so that no uncertainty can arise about which lith-ologies have ben assigned to which formation or mappabla unit, logs of each hole are needed that state the inter-cepts of each formation and mappable unit and of all shear zones, mylonitic zones, or faults of sufficient importance to be shown on Figures in the PSAR or the 1978-1979 Report.
c) so that no uncertainty can arise about which lith-ologies have ben assigned to which formation or mappabla unit, logs of each hole are needed that state the inter-cepts of each formation and mappable unit and of all shear zones, mylonitic zones, or faults of sufficient importance to be shown on Figures in the PSAR or the 1978-1979 Report.
ANSWER:
ANSWER:
1269 i47
1269 i47 INTERROGATORY NO. 81:  As a result of the gravimetric survey of Appendix C, it must be possible to revise a portion of the State Bouguer Gravity Map (Bonini, Hughes and Danes, 1974, Wash. Div. Geology and Earth Resources, Geologic Map GM-12),
 
. .
            .
INTERROGATORY NO. 81:  As a result of the gravimetric survey of Appendix C, it must be possible to revise a portion of the State Bouguer Gravity Map (Bonini, Hughes and Danes, 1974, Wash. Div. Geology and Earth Resources, Geologic Map GM-12),
and thereby improve the gravimetric evidence for the absence oc presence of structures of regional importance. Therefore, please provide at a scale of 1:500,000 a revision of Bonini et al. between 121* 50 ' and 122*15' West Longitude and between 48'25' and 48*35' North Latitude. A minimum of the following gravity base stations from Plate 1 should be shown:    COKBAS, 57, 75, 22, 681, 36, 80, 610, 57, 21, 564, and 67.
and thereby improve the gravimetric evidence for the absence oc presence of structures of regional importance. Therefore, please provide at a scale of 1:500,000 a revision of Bonini et al. between 121* 50 ' and 122*15' West Longitude and between 48'25' and 48*35' North Latitude. A minimum of the following gravity base stations from Plate 1 should be shown:    COKBAS, 57, 75, 22, 681, 36, 80, 610, 57, 21, 564, and 67.
ANSWER:
ANSWER:
1269 148
1269 148 INTERROGATORY NO. 81:  As a. result of the gravimetric survey of Appendix C, it must be possible to revise a portion of the State Bouguer Gravity Map (Bonini, Hughes and Danes, 1974, Wash. Div. Geology and Earth Resou rces, Geologic Map GM-12),
 
and thereby improve the gravimetric evidence for the absence or presence of structures of regional importance. Therefore, please provide at a scale of 1:500,000 a revision of Bonini et al. between 121'50' and ,122'15' West Longitude and between 48*25' and 48'35' North Latitude. A minimum of the following gravity base stations from Plate 1 should be shown:    COKBAS, 57, 75, 22, 681, 36, 80, 610, 57, 21, 564, and 67.
      '
.      .
                                                    .
  .
INTERROGATORY NO. 81:  As a. result of the gravimetric survey of Appendix C, it must be possible to revise a portion of the State Bouguer Gravity Map (Bonini, Hughes and Danes, 1974, Wash. Div. Geology and Earth Resou rces, Geologic Map GM-12),
and thereby improve the gravimetric evidence for the absence or presence of structures of regional importance. Therefore, please provide at a scale of 1:500,000 a revision of Bonini et
          "
al. between 121'50' and ,122'15' West Longitude and between 48*25' and 48'35' North Latitude. A minimum of the following gravity base stations from Plate 1 should be shown:    COKBAS, 57, 75, 22, 681, 36, 80, 610, 57, 21, 564, and 67.
ANSWER:
ANSWER:
1269 149
1269 149 b
                                                                                                      ,
b


                                                                        .
.  '.
  .
INTERROGATORY NO. 82:  Page E-20 makes much of the alleged widespread occurrence of titaniferous augite. Please explain why the trace element composition of the host rocks might not p rove to be more diagnostic of originally similar (or different) protoliths than the presence of titaniferous augite.
INTERROGATORY NO. 82:  Page E-20 makes much of the alleged widespread occurrence of titaniferous augite. Please explain why the trace element composition of the host rocks might not p rove to be more diagnostic of originally similar (or different) protoliths than the presence of titaniferous augite.
ANSWER:
ANSWER:
                               ~1269    150
                               ~1269    150 INTERROGATORY NO. 83:  With regard to the petrographic des-criptions of Appendix E, please provide the metamorphic facies of each rock (specify index minerals) or the reasons why a metamor-phic f acies cannot be assigned to the specimen.
              .
 
                                                                        ''
.
  ',
.
INTERROGATORY NO. 83:  With regard to the petrographic des-criptions of Appendix E, please provide the metamorphic facies of each rock (specify index minerals) or the reasons why a metamor-phic f acies cannot be assigned to the specimen.
Please also include this information in the description re-quested in Interrogatory #74(c).
Please also include this information in the description re-quested in Interrogatory #74(c).
AN SWER:
AN SWER:
                    .
INTERROGATORY NO. 84:  If Interrogatory # 83 is not answered, please provide the thin sections of all of the metavolvanic rocks, greenschists, greenstones, and ultramatic rocks described in Tables E-1 and E-2 and rocks of these types that are incleded in Interrogatory # 74(c) .
INTERROGATORY NO. 84:  If Interrogatory # 83 is not answered, please provide the thin sections of all of the metavolvanic rocks, greenschists, greenstones, and ultramatic rocks described in Tables E-1 and E-2 and rocks of these types that are incleded in Interrogatory # 74(c) .
AN SWER:
AN SWER:
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                                     -6'-
                                     -6'-


                                                                          '
.  '.
  .
INTERROG ATORY NO. 85:  Please provide the following infor-mation with regard to thin section 760-16 described on page E-9 and in Table E-2:
INTERROG ATORY NO. 85:  Please provide the following infor-mation with regard to thin section 760-16 described on page E-9 and in Table E-2:
a)  which of the characteristics described in Table E-2 can be used to identify this rock as Shuksan greenschist, b) the extent (including contacts on the mtp requested in Interrogatory #8) of this biotic rock type, and c)  the tectonic significance of this rock type at this locality.
a)  which of the characteristics described in Table E-2 can be used to identify this rock as Shuksan greenschist, b) the extent (including contacts on the mtp requested in Interrogatory #8) of this biotic rock type, and c)  the tectonic significance of this rock type at this locality.
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1269 152
1269 152


                                                                        .
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.
  .
INTERROGATORY NO. 87:  Where the answer to any part of Inter-rogatory #86 is yes, please cite an an example of such a record as a Figure published in a well known scientific journal (such as AAPG Bull.) or a textbook.
INTERROGATORY NO. 87:  Where the answer to any part of Inter-rogatory #86 is yes, please cite an an example of such a record as a Figure published in a well known scientific journal (such as AAPG Bull.) or a textbook.
ANSWER:
ANSWER:
                    .
INTERPOGATORY NO. 88:  Have the Applicants obtained any age determinations on the sediments penetrated by the high frequency seismic reflection surveys shown in Figure 3.4.1-7 or by the high frequenc, surveys between Wh! bey and Lopez Islands?
INTERPOGATORY NO. 88:  Have the Applicants obtained any age determinations on the sediments penetrated by the high frequency seismic reflection surveys shown in Figure 3.4.1-7 or by the high frequenc, surveys between Wh! bey and Lopez Islands?
ANSWER:
ANSWER:
1269 153
1269 153 INTERROGATORY NO. 89:  Figure 3.4.1-7 shows the intersection of the inferred " Ward f ault" with MOBIL seismic line 70-9. Dobrin's letter of 15 May in Appendix D implies that near this intersection "the trend of events leads to the identification of the reflections just above  "bs .ement" on W-70-9 as Miocene. "
 
  .                                                                        .
,
INTERROGATORY NO. 89:  Figure 3.4.1-7 shows the intersection of the inferred " Ward f ault" with MOBIL seismic line 70-9. Dobrin's letter of 15 May in Appendix D implies that near this intersection "the trend of events leads to the identification of the reflections just above  "bs .ement" on W-70-9 as Miocene. "
Please describe in detail how this identification of Miocene was made on that part of W-70-9 and southwest of the " Ward fault."
Please describe in detail how this identification of Miocene was made on that part of W-70-9 and southwest of the " Ward fault."
In answering this interrogatory please include traces of the relevant parts of lines W-70-4, and the entire length of W-70-9, marking the' contact between the middle Eocene and the Miocene in blue and the contact between the Miccene and the Pleistocene in green.
In answering this interrogatory please include traces of the relevant parts of lines W-70-4, and the entire length of W-70-9, marking the' contact between the middle Eocene and the Miocene in blue and the contact between the Miccene and the Pleistocene in green.
ANSWER:
ANSWER:
                      .
INTERROGATORY NO. 90:    Referring to Figure 3.4.1-7, in your professional opinion, what is the reason that MOBIL did not run its low frequency seismic reflection lines east of 122' W longitude?
INTERROGATORY NO. 90:    Referring to Figure 3.4.1-7, in your professional opinion, what is the reason that MOBIL did not run its low frequency seismic reflection lines east of 122' W longitude?
ANSWER:
ANSWER:
1269 154
1269 154 INTERROGATORY NO. 91:  If the last paragraph of page 2 of Dobrin's letter of 15 May 1979 in Appendix D is considered to be a substantive argument, please describe the traces of the following faults:
 
                                                                          .
    .
.    .
                                                              .
  .
INTERROGATORY NO. 91:  If the last paragraph of page 2 of Dobrin's letter of 15 May 1979 in Appendix D is considered to be a substantive argument, please describe the traces of the following faults:
a)  Devil's Mountain (Whetten, 1978) b)  San Andreas south Latitude 36' N c)  Denali of Alaska d)  Hosgri and related faults of California e)  Fraser - Ross Lake of British Columbia and Washington f) Fairweather on Land in Alaska g)  San Andreas north of 39' N h)  Garlock fault of California i) Big Pine of California j)  Atacama of Chile k)  Tintina - Kaltay f ault of Alaska
a)  Devil's Mountain (Whetten, 1978) b)  San Andreas south Latitude 36' N c)  Denali of Alaska d)  Hosgri and related faults of California e)  Fraser - Ross Lake of British Columbia and Washington f) Fairweather on Land in Alaska g)  San Andreas north of 39' N h)  Garlock fault of California i) Big Pine of California j)  Atacama of Chile k)  Tintina - Kaltay f ault of Alaska
: 1)  North Anatolian f ault of Turkey m)  Median tectonic line of Japan n)  Phillipine fault on northern Luzon Island o)  Motagua fault, G uatemala ANSWER:
: 1)  North Anatolian f ault of Turkey m)  Median tectonic line of Japan n)  Phillipine fault on northern Luzon Island o)  Motagua fault, G uatemala ANSWER:
                        .
                                                                     \
                                                                     \
l269 155
l269 155 INTERROGATORY NO. 92:    Please clarify the following (from Page 33 of Appendix A):
 
. ',                                                                      -
INTERROGATORY NO. 92:    Please clarify the following (from Page 33 of Appendix A):
a)  what a " geological inhomogeneity" is, and b)  what combinations of rock types might gause a susceptibility contrast of 500 x 10-cgs units.
a)  what a " geological inhomogeneity" is, and b)  what combinations of rock types might gause a susceptibility contrast of 500 x 10-cgs units.
ANSWE R:
ANSWE R:
Line 815: Line 474:
c)  the name of petrographer who did the petrographic descriptions, d)  which of the samples at site 9 are serpentine, e)  whether any of the susceptibility values listed for site 9 are typical of serpentinite, f)  which rocks at site 10 are metasedimentary and which are metavolcanic, g)  whether any of the susceptibility values listed for site 12 are typical of serpentine, h)  whether any information is available since October 1978 that causes a reidentification of the rock types at site 12, or at any other site, i)  which thin sections (if any) in Table E-2 that correspond to each of the samples BCH-101 to BCH-116.
c)  the name of petrographer who did the petrographic descriptions, d)  which of the samples at site 9 are serpentine, e)  whether any of the susceptibility values listed for site 9 are typical of serpentinite, f)  which rocks at site 10 are metasedimentary and which are metavolcanic, g)  whether any of the susceptibility values listed for site 12 are typical of serpentine, h)  whether any information is available since October 1978 that causes a reidentification of the rock types at site 12, or at any other site, i)  which thin sections (if any) in Table E-2 that correspond to each of the samples BCH-101 to BCH-116.
ANSWE R:
ANSWE R:
1269 i56
1269 i56 INTERROGATORY NO. 94:  Please explain why most of the meta-volcanic rocks described in the upper 800 feet of Test Hole 1 A (see Table E-1) are inferred to have been derived from basic, or andesitic protoliths despite the fact that these rocks have more than 10%
 
    '                                                                      '
.    .
  .
INTERROGATORY NO. 94:  Please explain why most of the meta-volcanic rocks described in the upper 800 feet of Test Hole 1 A (see Table E-1) are inferred to have been derived from basic, or andesitic protoliths despite the fact that these rocks have more than 10%
quartz.
quartz.
ANSWER:
ANSWER:
Line 830: Line 484:
                                         ~73-
                                         ~73-


  .                                                                      .
,
INTERROGATORY NO. 96:    The lack of geographic features on the aeromagnetic maps of Appendix A that are considered proprietary makes it extremely difficult to evaluate the aeromagnetic data.
INTERROGATORY NO. 96:    The lack of geographic features on the aeromagnetic maps of Appendix A that are considered proprietary makes it extremely difficult to evaluate the aeromagnetic data.
In addition, the maps that have been reduced f rom 1:24,000 to 1:62,500 are virtually illegible.      Furthermore, the data-reduction techniques used by LKB (see page A-9) that any potential similar-ity in the aeromagnetic patterns in the areas of the two surveys is obs cured.
In addition, the maps that have been reduced f rom 1:24,000 to 1:62,500 are virtually illegible.      Furthermore, the data-reduction techniques used by LKB (see page A-9) that any potential similar-ity in the aeromagnetic patterns in the areas of the two surveys is obs cured.
Line 842: Line 494:
g)  that all aeromagnetic maps show the flight lines and that these lines be given their appropriate number so that the same flight line on two or more figures can be readily identified, h)  that all aeromagnetic maps, including Figures 1-4, 1-12, and 3.1-18, have identifiable fiducial marks (crosses) at each intersection of 7.5' of longitude and latitude.
g)  that all aeromagnetic maps show the flight lines and that these lines be given their appropriate number so that the same flight line on two or more figures can be readily identified, h)  that all aeromagnetic maps, including Figures 1-4, 1-12, and 3.1-18, have identifiable fiducial marks (crosses) at each intersection of 7.5' of longitude and latitude.
ANSWER:
ANSWER:
1269 158
1269 158 INTERROGATORY NO. 97:    In the interest of clarity a single map at a scale of 1:62, 500 is requested that incorporates all of the features of Interrogatory No. 96 (except possibly 96(g) and combines the following:
 
  ,                                                                      .
,
INTERROGATORY NO. 97:    In the interest of clarity a single map at a scale of 1:62, 500 is requested that incorporates all of the features of Interrogatory No. 96 (except possibly 96(g) and combines the following:
a)  the magnetic trends of Figure 14 b)  the magnetic contact positions of Figure 16 c)  the lines of the profiles shown on Figures 19, 21A, and any other lines of profiles on other maps, d)  the anomalies plotted on Figure 24 e)  the position of the hypothetical "B and B" fault of Figure 25.
a)  the magnetic trends of Figure 14 b)  the magnetic contact positions of Figure 16 c)  the lines of the profiles shown on Figures 19, 21A, and any other lines of profiles on other maps, d)  the anomalies plotted on Figure 24 e)  the position of the hypothetical "B and B" fault of Figure 25.
Unless the plotting of features mentioned in (a) to (e) be-comes too confusing on a single map, this single map could replace Figures 14,  16', 24, and 25 of Appendix A.
Unless the plotting of features mentioned in (a) to (e) be-comes too confusing on a single map, this single map could replace Figures 14,  16', 24, and 25 of Appendix A.
ANSWER:
ANSWER:
                                                                          .
INTERROGATORY NO. 98:    In the interests of clarity, the ano-malies and areas that are plotted on Figure 24 are requested to be shown on Figures 1-12, 3.1-18, and 3.3-3 (wherever these figures overlap with Figure 24) .
INTERROGATORY NO. 98:    In the interests of clarity, the ano-malies and areas that are plotted on Figure 24 are requested to be shown on Figures 1-12, 3.1-18, and 3.3-3 (wherever these figures overlap with Figure 24) .
ANSWER:
ANSWER:
1269 i59
1269 i59 INTERROG ATORY NO. 99:  Page 15 of Appendix A states that Bechtel geol'ogists chose the outcrops for Dr. Beck to sample.
 
  '                                                                      -
.  .
INTERROG ATORY NO. 99:  Page 15 of Appendix A states that Bechtel geol'ogists chose the outcrops for Dr. Beck to sample.
Please provide the following:
Please provide the following:
(a)  the names of geologists who selected the outcrops, and (b) the exerptise these geologists have in designing and evaluating aeromagnetic surveys.
(a)  the names of geologists who selected the outcrops, and (b) the exerptise these geologists have in designing and evaluating aeromagnetic surveys.
ANSWER:
ANSWER:
                        .
INTERROGATORY NO. 100:    Please explain why magnetic sus-
INTERROGATORY NO. 100:    Please explain why magnetic sus-
       .ceptibilities of greater than 4000 x 10-6 were routeinely used to test or describe anomalies in Figures 20A, 20F, 20G, 22B, 22C, 23C, 24, etc.; whereas, with the single exception of sample BCH-087, the susceptibilities of all rocks in Appendix 1 of Appendix are less than 4000 x 10-6, ANSWER:
       .ceptibilities of greater than 4000 x 10-6 were routeinely used to test or describe anomalies in Figures 20A, 20F, 20G, 22B, 22C, 23C, 24, etc.; whereas, with the single exception of sample BCH-087, the susceptibilities of all rocks in Appendix 1 of Appendix are less than 4000 x 10-6, ANSWER:
1269 160
1269 160 INTERROGATORY NO. 101:    Page A-7 s tates that flight line profiles were presented at a scale of 1:24,000.      Please have these profiles available for inspection at the of ficos of Perkins, Cole, S tone, Olsen & Williams , attorneys for the Applicants.
 
. '.                                  .
* INTERROGATORY NO. 101:    Page A-7 s tates that flight line profiles were presented at a scale of 1:24,000.      Please have these profiles available for inspection at the of ficos of Perkins, Cole, S tone, Olsen & Williams , attorneys for the Applicants.
AN SWE R:
AN SWE R:
INTERROGATORY NO. 102:    Please explain whether any aeromagnetic lineaments or anomalies within the areas of Figures 8 and 15 of Appendix A      are known to be caused by the following:
INTERROGATORY NO. 102:    Please explain whether any aeromagnetic lineaments or anomalies within the areas of Figures 8 and 15 of Appendix A      are known to be caused by the following:
a)  cultural features, including pipelines and transmi.ssion lines, and b)  survey specifications such as those mentioned on page A-24.
a)  cultural features, including pipelines and transmi.ssion lines, and b)  survey specifications such as those mentioned on page A-24.
ANSWER:
ANSWER:
1269 161
1269 161 INTERROGATORY NO. 103: With regard to the aeromagnetic anomaly on Little Haystack Moutain that is described on page 35 and successive pages, please explain the following:
 
      '                                                                        *
.      .
  .
* INTERROGATORY NO. 103: With regard to the aeromagnetic anomaly on Little Haystack Moutain that is described on page 35 and successive pages, please explain the following:
a)  why Figure 6 with E-W flight lines and variable ground clearance instead of Figures 3 or 5 was chosen to represent this northwesterly trending anomaly, b)    the differences that could be expected in the profiles of Figure 20A to 20G if the observed magnetic profile were taken from Figures 3, 5, or 19 which show different shapes of the anomaly than Figure 6 does, c)  why a different location and azimuth were chosen for.the magnetic cross section through Little Haystack Mountain than for the geological cross section through the same mountain shown in Figure 3.1-15, d)  why the width of the serpentine body is not shown on Figure 19, e)  why lower susceptibilities than those modeled in Figures 20E and 20G might not show a better fit between the height and width of the calculated fields than the susceptibilities that were assumed, and f)  what data preclude the possiblity that the Little Haystack anomaly is caused by a serpentinite body that dips approxima tely 4 5* SW, has a susceptibility similar to one of the four values listed for site 1 in Appendix A, and which is confined to the northeastern part of the cutcrop belt (with smaller discrete bodies making up the southwestern portion of the belt, as might be inferred from the surface geology shown on Profile A-A of Figura 3.1-15) .
a)  why Figure 6 with E-W flight lines and variable ground clearance instead of Figures 3 or 5 was chosen to represent this northwesterly trending anomaly, b)    the differences that could be expected in the profiles of Figure 20A to 20G if the observed magnetic profile were taken from Figures 3, 5, or 19 which show different shapes of the anomaly than Figure 6 does, c)  why a different location and azimuth were chosen for.the magnetic cross section through Little Haystack Mountain than for the geological cross section through the same mountain shown in Figure 3.1-15, d)  why the width of the serpentine body is not shown on Figure 19, e)  why lower susceptibilities than those modeled in Figures 20E and 20G might not show a better fit between the height and width of the calculated fields than the susceptibilities that were assumed, and f)  what data preclude the possiblity that the Little Haystack anomaly is caused by a serpentinite body that dips approxima tely 4 5* SW, has a susceptibility similar to one of the four values listed for site 1 in Appendix A, and which is confined to the northeastern part of the cutcrop belt (with smaller discrete bodies making up the southwestern portion of the belt, as might be inferred from the surface geology shown on Profile A-A of Figura 3.1-15) .
                                                          .
AN SWER:
AN SWER:
1269 162
1269 162 INTERROGATORY NO.104:    The 'first paragraph of page A-25 discused the evaluation of magnetic linears and concludes with the following s tateme nt:
 
  '                                                                          *
.    ,
_
INTERROGATORY NO.104:    The 'first paragraph of page A-25 discused the evaluation of magnetic linears and concludes with the following s tateme nt:
However, EDCON would not assign a f ault-related origin to these (northwest trending magnetic) lineaments without other evidence in addition to the magnetic expression above.
However, EDCON would not assign a f ault-related origin to these (northwest trending magnetic) lineaments without other evidence in addition to the magnetic expression above.
Please explain, in light of this exemplary statement, whether strongly negative conclusions A, B,      and E of pages A-54 and A-55 should be modified.
Please explain, in light of this exemplary statement, whether strongly negative conclusions A, B,      and E of pages A-54 and A-55 should be modified.
ANSWER:
ANSWER:
                          .
INTERROGATORY NO.105 :  Although no LKB data sheets have been submitted that include the area of the Devil's Mountain f ault, Page 25 notes that the magnetic lineament as continuous, straight, and undisturbed as the Devil's Mountain f ault shown on the Aero Service survey (Figure 8) do not occur on the LKB data sheets.
INTERROGATORY NO.105 :  Although no LKB data sheets have been submitted that include the area of the Devil's Mountain f ault, Page 25 notes that the magnetic lineament as continuous, straight, and undisturbed as the Devil's Mountain f ault shown on the Aero Service survey (Figure 8) do not occur on the LKB data sheets.
ANSWER:
ANSWER:
    ,                                                                    .
,
  .
INTERROG ATORY NO. 106: Section iii of Page A-31 appears to use the terms " areas" and " provinces" interchangeably. Is this the intent, or -does " province" have a dif ferent connotation than
INTERROG ATORY NO. 106: Section iii of Page A-31 appears to use the terms " areas" and " provinces" interchangeably. Is this the intent, or -does " province" have a dif ferent connotation than
       " Area"?
       " Area"?
AN SWER:
AN SWER:
                    .
INTERROGATORY NO. 107:  Section 111 of Page A-31 alleges that the two different magnetic provinces or areas on Figures 14, 15, and 16 correspond to the Church Mountain /Decatur Plate and to the Shuksan Plate. Please explain how this correlation can be seen without the contact between the two plates being shown on ''igures 14, 15, 16 or on a transparent overlay.
INTERROGATORY NO. 107:  Section 111 of Page A-31 alleges that the two different magnetic provinces or areas on Figures 14, 15, and 16 correspond to the Church Mountain /Decatur Plate and to the Shuksan Plate. Please explain how this correlation can be seen without the contact between the two plates being shown on ''igures 14, 15, 16 or on a transparent overlay.
ANSWER:
ANSWER:
1269 164
1269 164 INTERROGATORY NO. 108:    In order to determine the location of the anomalies shown on Figure 17 please provide the following:
 
                                                                          .
.  .
.
INTERROGATORY NO. 108:    In order to determine the location of the anomalies shown on Figure 17 please provide the following:
a)  the fiducial marks on the ends of each profile and at the ends of the segments of each profile shown on Figure 17, b)  the position of the flight lines on Figures 5, 6, and 7 as is done on Figu res 2, 3, and 4, and ANSWER:
a)  the fiducial marks on the ends of each profile and at the ends of the segments of each profile shown on Figure 17, b)  the position of the flight lines on Figures 5, 6, and 7 as is done on Figu res 2, 3, and 4, and ANSWER:
                                                                    .
INTERROG ATORY NO. 109: Please explain the cause of the following anomalies on Figure 17:
INTERROG ATORY NO. 109: Please explain the cause of the following anomalies on Figure 17:
i)  the 20 to 30 gamma anomaly approximately 1/2 mile east of Gilligan Creek on flight line 124, and b)  all other anomalies with a contrast of more than 50 gammas above background (the traces of many of which are discontinuous on Figure 17 between Day and Gilligan Creeks).
i)  the 20 to 30 gamma anomaly approximately 1/2 mile east of Gilligan Creek on flight line 124, and b)  all other anomalies with a contrast of more than 50 gammas above background (the traces of many of which are discontinuous on Figure 17 between Day and Gilligan Creeks).
ANSWER:
ANSWER:
1269 165
1269 165 INTERROGATORY NO. 110: Page 32 states that "No evidence can be seen of any through-going magnetic response that is associated with the location.or direction of either Giligan or Day Creek."
 
                                                                        .
.  ..
%
INTERROGATORY NO. 110: Page 32 states that "No evidence can be seen of any through-going magnetic response that is associated with the location.or direction of either Giligan or Day Creek."
Please define "through-going," taking into consideration that if f aults do exist along Gilligan and Day Creeks, Darrington phyllite is f aulted against Darrington phyllite along the southern side of the Skagit Valley.                                  .
Please define "through-going," taking into consideration that if f aults do exist along Gilligan and Day Creeks, Darrington phyllite is f aulted against Darrington phyllite along the southern side of the Skagit Valley.                                  .
ANSWER:
ANSWER:
                      .
1269 166
1269 166
                                                                        .


.                                                                        .
    .
,
INTERROG ATORY NO. 111:  One method of determining whether the lineaments along Day Creek and Gilligan Creek are faults or not would be to compare the magnetic patterns on each side of the lineation to see if similar magnetic patterns have been offset.
INTERROG ATORY NO. 111:  One method of determining whether the lineaments along Day Creek and Gilligan Creek are faults or not would be to compare the magnetic patterns on each side of the lineation to see if similar magnetic patterns have been offset.
This is not done in Volume #2, therefore, explain the evidence for the dissimilarity (or similarity) of the following:
This is not done in Volume #2, therefore, explain the evidence for the dissimilarity (or similarity) of the following:
Line 934: Line 540:
Decatur Plate southeast of the Gilligan Creek lineament with that on the northeastern side, and (b)  the same for the Day Creek lineament.
Decatur Plate southeast of the Gilligan Creek lineament with that on the northeastern side, and (b)  the same for the Day Creek lineament.
ANSWER:
ANSWER:
                          .
9 1269 167 INTERROGATORY NO.112:    Figu res 3, 5, and 6 of Appendix A show essentially the same area. Please ' explain the following:
9 1269 167
  .
 
  .                                                                      .
.
%
INTERROGATORY NO.112:    Figu res 3, 5, and 6 of Appendix A show essentially the same area. Please ' explain the following:
a)  which of these three maps best displays the magnetic anomalies of the area, and b)  what characteristics of the chosen map make it superior to the other two.
a)  which of these three maps best displays the magnetic anomalies of the area, and b)  what characteristics of the chosen map make it superior to the other two.
ANSWER:
ANSWER:
I INTERROGATORY NO. 113:  Page 34 of Appendix A states that there is no evidence for a fault between Butler Hill and anomaly A. Please explain what party or authority sugguested that a f ault existed in this location.
I INTERROGATORY NO. 113:  Page 34 of Appendix A states that there is no evidence for a fault between Butler Hill and anomaly A. Please explain what party or authority sugguested that a f ault existed in this location.
AN SWE R:
AN SWE R:
1269 168
1269 168 INTERROGATORY NO. 114: Page 34 states that no evidence of an easterly trending fault exists south of anomaly A.        Please explain the aeromagnetic evidence that precludes the possibility of a fault striking approximately N 70* E passing south of anomaly A.
 
.  ..                                                                          .
  .
INTERROGATORY NO. 114: Page 34 states that no evidence of an easterly trending fault exists south of anomaly A.        Please explain the aeromagnetic evidence that precludes the possibility of a fault striking approximately N 70* E passing south of anomaly A.
ANSWER:
ANSWER:
INTERROG ATORY NO .115 :  Page 37 states that a three dimensional
INTERROG ATORY NO .115 :  Page 37 states that a three dimensional
Line 957: Line 552:
1269 169 c35-
1269 169 c35-


                                          '
. t.                                                                    .
. t.                                                                    .
  ,
INTERROGATORY NO. 116:    With regard to the modeling of the thrust plane on Cultus Mountain in Figures 21 A and 21B, please exnlain the following:
INTERROGATORY NO. 116:    With regard to the modeling of the thrust plane on Cultus Mountain in Figures 21 A and 21B, please exnlain the following:
a)  why on Figure 21 A the " Inferred Location of the Thrust from Bechtel Geologic Map" appears to be different than the location of the. thrust on Appendix H, b)  why the " Inferred Position of Main Thrust from Magnetic Data on Figure 21 is shown only for profile C-C' and not for A-A' and B-B',
a)  why on Figure 21 A the " Inferred Location of the Thrust from Bechtel Geologic Map" appears to be different than the location of the. thrust on Appendix H, b)  why the " Inferred Position of Main Thrust from Magnetic Data on Figure 21 is shown only for profile C-C' and not for A-A' and B-B',
Line 966: Line 559:
ANSWER:
ANSWER:
1269 170
1269 170
                                                                                                                  .


       ^                                                                  .
       ^                                                                  .
.      .
  .'
%
INTERROGATORY NO. 117:    With regard to Figure 24, please explain - the following:
INTERROGATORY NO. 117:    With regard to Figure 24, please explain - the following:
a)  whether the " determined dip of the body" (shown in the legend and on the map) is a geological measurement or a geophysical inference,
a)  whether the " determined dip of the body" (shown in the legend and on the map) is a geological measurement or a geophysical inference,
Line 979: Line 568:
a)  the basis for EDCON's interpretation, b)  the significance that the different shape of the anomaly as measured by Thompson (1973) and by LKB has in the geological interpretation of the shape, orientation, and composition of the causitive body, c)  where the profile data and limited modeling (page 43) would place the inferred position of the contact of the ultramatic body, and d)  how (c) above coincides with the mapped location of the ultramatic body on Appendix H.
a)  the basis for EDCON's interpretation, b)  the significance that the different shape of the anomaly as measured by Thompson (1973) and by LKB has in the geological interpretation of the shape, orientation, and composition of the causitive body, c)  where the profile data and limited modeling (page 43) would place the inferred position of the contact of the ultramatic body, and d)  how (c) above coincides with the mapped location of the ultramatic body on Appendix H.
ANSWER:
ANSWER:
                                            .
                                                               ~1269  171 a      .
                                                               ~1269  171
 
                                                                            -
a      .
  - ;%
INTERROGATORY NO. 119:    With regard to the modeling of the South Chuckanut Mountain aeromagnetic anomaly discussed on page A-44 to A-48 and shown on Figures 23B to 23D please show the best two alternative calculated models for a two part body consis ting of the following:
INTERROGATORY NO. 119:    With regard to the modeling of the South Chuckanut Mountain aeromagnetic anomaly discussed on page A-44 to A-48 and shown on Figures 23B to 23D please show the best two alternative calculated models for a two part body consis ting of the following:
a)  an east-west striking portion similar to that shown in Appendix A, Figure 23B, and b)  a steeply dipping portion of similar composition that strikes about l' 30' W, is tangent to the southwestern corner of the portion describsd in (a), and has a K value of less than <4000 x 10-6, ANSWER:
a)  an east-west striking portion similar to that shown in Appendix A, Figure 23B, and b)  a steeply dipping portion of similar composition that strikes about l' 30' W, is tangent to the southwestern corner of the portion describsd in (a), and has a K value of less than <4000 x 10-6, ANSWER:
                          .
INTERROGATORY NO.120:      With regard to the discussion of Anomaly 2 on page 51, please explain the following:
INTERROGATORY NO.120:      With regard to the discussion of Anomaly 2 on page 51, please explain the following:
a)  does the Applicant concur with EDCON's interpre-tation that Anomaly 2 may represent the average position of the Shuksan thrust, b)  if so, please explain why the position of the thrust is shown farther to the northeast on Appendix H.
a)  does the Applicant concur with EDCON's interpre-tation that Anomaly 2 may represent the average position of the Shuksan thrust, b)  if so, please explain why the position of the thrust is shown farther to the northeast on Appendix H.
ANSWER:
ANSWER:
1269 172
1269 172 s
 
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* RELATED CORRESPONDE UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING APPEAL BOARD In the Matter of                    )
* RELATED CORRESPONDE UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING APPEAL BOARD In the Matter of                    )
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14 dated September -}A,1979 have been served on the following by depositing the same in the United States mail, postage H IM) prepaid, on this L6th day of S eptember, 1979.
14 dated September -}A,1979 have been served on the following by depositing the same in the United States mail, postage H IM) prepaid, on this L6th day of S eptember, 1979.
Valentine B. Deale, Esq., Chairman          Docketing and Service Section Atomic Safety and Licensing Board          Office of the Secretary U.S. Nuclear Regulatory                    U.S. Nuclear Regulatory Commission                                Commission 1001 Connecticut Avenue N.W.                Washington, D.C.      20555 Washington, D.C. 20036 Richard L. Black, Esq.
Valentine B. Deale, Esq., Chairman          Docketing and Service Section Atomic Safety and Licensing Board          Office of the Secretary U.S. Nuclear Regulatory                    U.S. Nuclear Regulatory Commission                                Commission 1001 Connecticut Avenue N.W.                Washington, D.C.      20555 Washington, D.C. 20036 Richard L. Black, Esq.
Dr. Frank F. Hooper, Member                Couns ?l for NRC S taf f Atomic Safety and Licensing Board          U.S. Nuclear Regulatory School of Natural Resources                    Commission University of Michigan                    Office of the Executive Legal Ann Arbor, MI. 48104                      Director Washington, D, C.        20555 Gustave A. Linenberger, Member Atomic Safety and Licensing Board          Nicholas D. Lewis, Chairman U.S. Nuclear Regulatory                    Energy Facility Site Evaluation Commission                                Council Washington, D.C.      20555                820 East Fif th Avenue Olympia, Washington 98504 Certificate - 1
Dr. Frank F. Hooper, Member                Couns ?l for NRC S taf f Atomic Safety and Licensing Board          U.S. Nuclear Regulatory School of Natural Resources                    Commission University of Michigan                    Office of the Executive Legal Ann Arbor, MI. 48104                      Director Washington, D, C.        20555 Gustave A. Linenberger, Member Atomic Safety and Licensing Board          Nicholas D. Lewis, Chairman U.S. Nuclear Regulatory                    Energy Facility Site Evaluation Commission                                Council Washington, D.C.      20555                820 East Fif th Avenue Olympia, Washington 98504 Certificate - 1 I269 173
                                                            .
I269 173
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                                                                      '
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Richard M. Sandvik, Esq.,      Russel W. Busch Assistant Attorney General      Evergreen Legal Services Department of Justice          520 Smith Tower 500 Pacific Building            Seattle, Washington      98104 520 S. W. Y amhill Portland, Oregon    97204      Thbmas Moser Deputy Prosecuting Attorney Robe rt Lowens tein, Esq.      Skagit County Courthouse Lowenstein, Newman, Reis &      M t. Vernon, Washington 98273 Axelrad 1025 Connecticut Avenue, N.W. Warren Hastings Washington, D.C. 20036          Portland General Electric Co.
Richard M. Sandvik, Esq.,      Russel W. Busch Assistant Attorney General      Evergreen Legal Services Department of Justice          520 Smith Tower 500 Pacific Building            Seattle, Washington      98104 520 S. W. Y amhill Portland, Oregon    97204      Thbmas Moser Deputy Prosecuting Attorney Robe rt Lowens tein, Esq.      Skagit County Courthouse Lowenstein, Newman, Reis &      M t. Vernon, Washington 98273 Axelrad 1025 Connecticut Avenue, N.W. Warren Hastings Washington, D.C. 20036          Portland General Electric Co.
121 S.W. Salmon Street James W. Durham, Esq.          TB 13 Portland General Electric Co. Portland, Oregon    97204 121 S.W. Salmon Street TB 17 Portland, Oregon 97204 CFSP and FOB E. Stachon & L. Marbet 19142 S. Bakers Ferry Road Boring, Oregon 97009 Canadian Consulate General Peter A. van Brakel Vice-Consul 412 Plaza 600 ~
121 S.W. Salmon Street James W. Durham, Esq.          TB 13 Portland General Electric Co. Portland, Oregon    97204 121 S.W. Salmon Street TB 17 Portland, Oregon 97204 CFSP and FOB E. Stachon & L. Marbet 19142 S. Bakers Ferry Road Boring, Oregon 97009 Canadian Consulate General Peter A. van Brakel Vice-Consul 412 Plaza 600 ~
Line 1,025: Line 598:
           & Williams 1900 Washington Building Seattle, Washington 98101 Alan P. O' Kelly Pain'e, Lowe, Coffin, Herman
           & Williams 1900 Washington Building Seattle, Washington 98101 Alan P. O' Kelly Pain'e, Lowe, Coffin, Herman
           & O' Kelly 1400 Washington Trust Financial Center Spokane, Washington      99204 DATED:    .
           & O' Kelly 1400 Washington Trust Financial Center Spokane, Washington      99204 DATED:    .
                                                    .
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ROGER    . LEED By    l-w a    I-    AN' Certificate - 2
ROGER    . LEED By    l-w a    I-    AN' Certificate - 2
                                             ,  \269 \14}}
                                             ,  \269 \14}}

Latest revision as of 08:33, 22 February 2020

Interrogatories & Requests for Production of Documents, Directed to Applicant Re Bechtel Rept of Geological Investigations in 1978-79. Documents Should Be Delivered on 791001.Certificate of Svc Encl
ML19254F056
Person / Time
Site: Skagit
Issue date: 09/14/1979
From: Leed R
SKAGITONIANS CONCERNED ABOUT NUCLEAR POWER (SCANP)
To:
PUGET SOUND POWER & LIGHT CO.
References
NUDOCS 7911050510
Download: ML19254F056 (90)
v • d • e


Text

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nsuRD CORRESPONDENCE g ]

pg PUBLIC DUcUMENT ROOM SEP 131979 # y b CN d * *#

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UNITED STATES OF AMERICA  %/

NUCLEAR REGULATORY COMMISSION 'N' C' BEFORE THE ATOMIC SAFETY AND LICENSING APPEAL BOARD In the Matter of )

)

PUGET SOUND POWER & LIGHT ) DOCKET NOS. STN 50-522 COMPANY, et al., ) 50-523

)

)

(Skagit Nuclear Power Project, ) f5 ppd- l9 , 1979 Units 1 and 2) ) 1

)

)

INTERVENOR SCANP ' S INTERROGATORIES AND REQUESTS FOR PRODUCTION TO APPLICANT TO: APPLICANT PUGET SOUND POWER & LIGHT AND ITS ATTORNEYS In accordance with 10 CFR S2.740(b) and 10 CFR S2.741, please

~

answer the following Interrogatories and respond to the accompany-ing Requests for Production.

Documents to be produced should be presented at the offices of undersigned counsel at $5 ' Ot_ j . m. ()(qh l , 1979, or at such other time and place as may be agreed upon.

As used herein, the term " document" means all writinge and records of every type in the possession or control o' Applicant or its directors, officers, members, employ ees , attorneys, con-su]tants, agents or representativec, including, but not limited to, memoranda, correspondence, reports, survevs, charts, books, photographs, maps, notes, studies, drawings, writings, mi nu tes ,

t 7'9110 5 0 $"/ O 1269 084 (p.

notes of telephone conversations, notes of meetings or other conve rs a tions , and all other records.

DATED this day of , 1979.

ROGER M. LEED The following interrogatories are in regard to the three volume submitted entitled " Report of Geological Investigations in 1978-1979" f or Puget Sound Power & Light Company by Bech'tel Incorporated.

INTERROGATORY NO. 1: For Appendix H and for each geolo-gical and geophysical map in Section 3 (volume 2) please speci-fy the following:

(a) the name of the geologist or geophysicist who did the field work, (b) whether this person is a Bechtel consultant or em-ployee.

(c) the professional qualifications and experience of each employee of Bechtel named in (a) above, (d) in the event that more than one person conducted the field work, indicate which portion of each map each per-son is responsible for, and (e) the dates when each person named in (a) or (d) con-ducted the field work.

ANSWER:

k2b

. I INTERROGATORY NO. 2: Please indicate by overlays or index maps the sources of data for each pcrtion of Appendix A. A map similar to Figure 1-3 is requested. Please identify each area on the map as to the name of the author, the date of the pub-lication (or if the map is not part of a thesis, dissertation or other publication, the date of field work) and the scale of the au thor 's map. "Do not include within the authoriship of the Ap-li cants ' employees or consultants areas that were mapped by others, but merely field checked by the Applicants' employees or consultants.

ANSWER:

1269 086

. 7 REQ UEST FOR PRODUCTION NO. 1: Please provide the field notes, Zield maps, and compilation maps of each area mapped since May 1, 1978 by the Applicants' employees or consultants.

INTERROG ATORY NO. 3: Please provide names and prof essional qualifications of all geological and geophysical consultants to the appliccants that are/were not employees or consultants to Bechtel Corp.

ANSWER:

REQUEST FOR PRODUCTION NO. 2: Please provide all field notes, field maps, compilation maps and other documents produced by the consultants (listed in the answer to interrogatory No. 3) or by the applicants in relation to said consultants.

INTERROG ATORY NO. 4: Please identify the person or persons who described each thin section in Appendix r..

ANShT R:

1269 087 s

INTERROGATORY NO. 5: Please indicate each thin section in Appendix E that was examined by Dr. Misch or by Dr. Gerald Miller and indicate each description in Appendix E that has been explicitly approved by either Dr. Misch ' or D r. Miller.

ANSWER:

INTERROGATORY NO. 6: Please submit the professional qual-ifications and experience of the following persons:

Mr. Jorge Martinez D r. Robert L. Rose, San Jose State University Dr. Terry Davis, Los Angeles State University ANSWER:

1269 088 s

INTERROGATORY NO. 7: Three high resolution seismic re-flection surveys are shown on Figure 3.4.1-7. Please provide the f ollowing information:

(a) those portions (give S.P. numbers or other inter-c ep ts for each portion) in which penetration unequivocally was down to or below the bedrock surface, (b) the depth (both as two way travel time and as feet) at which bedrock was penetrated, (c) the location of these bedrock intercepts on Figure 3.4.1-7, (d) the age in years of each prominent reflector above each bedrock intercept, (e) Give the depth (both as two way travel time and as feet) for each'of these prominent reflectors in (d ) .

The following suggestions are offered to facilitate res-ponding to this interrogatory:

(a) Instead of compiling lists of the data requested in (a), (b), (c), (d) and (e) each portion of a seismic reflection line that does penetrate bedrock could be X e ro xe d , S.P.

numbers (or other intercepts) and the scale for two way travel times written on Xerox where necessary, bedrock marked in green, and prominent reflectors (above the bedrock) and their age marked in some other color.

(b) It migh t also be noted that the bedrock surface is fairly eas ily identifiable on the lower frequency reflection lines run by MOBIL, thus if some doubt exists as to whether bedrock was penetrat9d on one of the high frequency lines, the depth to bedrock on nearby MO BIL lines could be checked for comparison.

ANSWER:

1269 089 INTERROGATORY NO. 8: Several of the maps in Section 3 have a scale o~f approximately 1:24,000 and overlap to provide continuous coverage (Figures 3.2-2, 3.1-15, 3.1-16 3.1-17, 3.2-10, and 3.4.3-1). Furthermore, Figure 3.1-14 is within 1/2 mile of the edge of Figure 3.2-2, and the edge of PSAR Figure 2.5-26b is only 2 miles from the edge of Figure 3.2-2.

In some cases the geology shown on one map is different than that shown for the same area on an overlapping map (for example see Interrogatory # 41) . In another case the geological units shown on one figure do not show on another (compare Figure 3.2-2 with Figure 3.1-5). Additionally, geological information critical to interpreting the maps commonly occu rs on one map but not in the area of ove rla p of another map 1269 090

~

(compare Figure 3.2-2 and 3.2-10 with Figure 3.1-15) . Discre-pancies also occur between these maps at a scale of 1:24,000 and Appendix H (for example see Interrogatory #23).

In order to f acilitate and clarify review of these volumes this interrogatory requests the following compilations and uni-formi ty in scale (at 1:24,000):

(a) that two geological maps at a scale of 1:24,000 be prepared and that these maps include all of the 1:24,000 geological maps noted above, (b) that one of the requested maps show the bedrock geo-logy, the other the glacial geology, (c) that geological discrepancies between these maps, between them and Appendix H, and between the compilation maps on a scale of 1:24,000 and Appendix H be resolved.

(d) that all geological cross sections that have been prepared at various scales larger than 1:24,000.(for example Figure 3.1-13) for areas within the requested compilation maps also be redrafted to 1:24,000, (e) that all aeromagnetic coverage within the area of the compilation map of a scale of 1:24,000 also be presented at a scale of 1:24,000 (Appendix A, page 7, notes that the data wer.e originally presented ona scale of 1:24,000) and that this map be prepared as an overlay to the geological maps (see Interro-ga tory No. 98).

(f) that all gravimetric coverage within the area of the compilation map of a scale of 1:24,000 also be presented at a 1269 091

a sc'le of 1:24,000, and that this map be prepared as an overlay to the geological maps, (g) that all ground magnetic traverses and aeromagnetic flight lines within the area of the compilation geological maps of a scale of 1:24,000 also be plosted at a scale of 1:24,000 and that the location of these traverses also be prepared as an overlay to the geological maps, (h) that an index map be presented showing which geolo-gists mapped which portion of the requested 1:24,000 scale geological maps (see Interrogatories #2 and 36).

The following suggestions are made in hopes of producing geological maps of the highest possible quality:

(a) that the mapped units be in color as they are for Figu res 3.1-12, 3.1-14, 3.1-15, 3.1-16, 3.1-17, etc., and the PSAR Figu res 2.5-4b, 2.5-7s, etc.,

(b) that in addition to colors, individual strike and dip symbols be shown as they are in Figure 3.2-2 and 3.2-10 rather than the barely legible style used in Figure 3.4.31, (PSAR Figure 2.5-7ab is a possible model),

(c) that contacts (observed, cove red, or inferred) be shown for mappable units (which might be defined as two or more nearby outcroos of similar lithologies) be shown so as to ind,icate the structural and stratigr- 'i c features of the area, (d) that by using techniques (a), (b ), and (c), noto-tions on the maps can be considerably reduced, thereby en-hancing clarity of concept and of presentation, (e) that the Applicant be encouraged to expand the area of the compilation maps here requested if he has available additional mapping at a scale of 1:24,000 or greater, and (f) that if the compilation maps become so large as to be cumbersome, the Applicant consider preparing two or more adjoining maps (as Federal and State geological surveys com-monly do for adjoining quadrangles).

1269 092

ANSWER:

Many of the interrogatories that follow are requests for additional information, clarification of geological or geophy-s i c,c'a l da ta, and requests for a common data base of 1:24,000 within the area for which this interrogatory rquests a compila-tion at a unificd scale of 1:24,000. Thus some of the following interrogatories duplicate the request made here. If the Applicant meets the requests made herein and believes that in doing so he has answered individual interrogatories that follow, he should so indicate for each interrogatory.

1269 093

INTERROGATORY NO. 9: Page 3.4.1-16 s tates that strandlines occur in Everson drif t on either side of the "B&B" (and by implication the BB-LC) fault. Please provide the.following information: ,

(a) a geological map of the Everson drift in the areas in-dicated on Figure 3.4.1-3 at a scale of 1:24,000 or greater.

This map should depict the stratigraphy of the Everson in at least as much detail as the " Description of Map Units" given by Easterbrook (1976, USGS Map I-854-B) and by Siegf ried (1978, M.S. AT WWU),

(b) the location of strandlines across the B&B fault that are known to be correlative, (c) the evidence for the absolute age of these correlative strandlines, (d) the methods f~or determining the altitudes of these strandlines within 10 feet (see Interrogatory No. 57), and (e) because this map will be at a scale of 1:24,000, please include it as part of Interrogatory #8, including aeromagnetic data at the same scale.

ANSWER:

1269 094 INTERROGATORY NO. 10: Page 3.1-24 states that the rocks of the Church Mountain plate give " rise to a high-intensity magne-tic background with high amplitude, short wave length magnetic anamolies characterizing the magnetic signature of the plate."

Please provide an aeromagnetic map of any major portion of the type area of the Church Mountain plate from the Canadian border to the Sauk River that shows its characteristic magnetic signature. For ease in comparison, please provide this map at the same scale and with the same contour interval of gammas as was used in Appendix I (or whatever map best characterizes the magnetic signature of the Church Mountain plate in the vicinity of the plant site; as indicated in Interrogatory No. 8, the best scale would be 1:24,000). Please evaluate or model the ef fects that differences in the (1) spacing of flight lines and (2) ground clearance of the aircraf t in the two areas might have in making the magnetic signatures appear to be different.

AN SWE R:

1269 095 3 INTERROGATORY NO. 11: Please provide an aeromagnetic map of the San Juan Islands (from San Juan Island on the west to Interstate 5 on the east) showing the characteristic magnetic signature of these rocks. For ease in comparison, please provide this map at the same scale and with the same contour interval of gammas as was used in Appendix I (or whatever scale

[such as 1:24,000] best characterizes the magnetic signature of the alleged Church Mountain plate in the vicinity of the plant site). Please evaluate or model the ef fects that dif ferences in the (1) spacing of flight lines and (2) ground clearance of the aircraft in the two areas might have in making the magnetic signatures appear to be different.

ANSWER:

1269 096 ,

REQUEST FOR PRODUCTION NG. 3: Please provide the field notes, field maps, and compilation maps of the geological map-ping mentioned on page 3.4.1-5 of Pleistoc?ne sediments done for the 1978-1979 s tudy. Please name all persons involved in this mapping.

If this mapping is available on a scale of 1:24,000, please include it as part cf Interrogatory No. 8.

INTERROG ATORY NO. 12: Please explain what lithologica.

criteria can be used to distinguish ehe Shuksan thrust from other faults that may have juxtaposed rocks of the Shuksan plate agians fthe alleged " Church Mountain" plate.

ANSWER:

1269 097 INTERROGATORY No. 13: Figure 3.1-11 shows the alternative interpretations for a thrust plate south of the Skagit River.

In Appendix E, pages E-6 and E-19 s tate that Vance belicves that the rocks beneath the Shuksan thrust plate in the study area are correlative with some rocks of the San Juan terrane.

Please list the reasons why Vance believes that these rocks are part of the " San Juan terrane" and the criteria he uses to distinguish " San Juan" rocks from rocks of the Church Mountain thrust plate.

ANSWER:

INTERROG ATORY NO. 14: Please list the criteria that Bech-tel and its consultants (especially Miller) use to distinguish

" San J tan" rocks from rocks of the Church Mountain thrust plate.

ANSWER:

1269 098 '

INTERROGATORY NO. 15: Page E-19 s tates that greenschists have been recognized' on the west side of upper Day Creek.

Please indicate which of these samples are described in Table E-2 as implied on page E-19.

ANSWER:

INTERROGATORY NO. 16: Page 3.1-29 s tates that the Shuksan thrust is a zone. However, Figure 3.4.3-1 appears to be the only figure that shows even a portion of this zone as a separate map-able unit. Therefore, please show this zone on the 1:24,000 compilation map requested in Interrogatory No. 8 or the revised maps requested in Interrogatories No. 19 and 22) and on Appendix H (if this zone is wide enough to show at 1:62,500).

Wherever possible, please show the following within the thrust zone:

(a) the extent of exotic slices of serpentinite, silica carbonate rock, and other rock types, 1~269 099

4 i (b) foliations within (a),

(c) shear zones, catalas tic zones, and mylonitic zone, and (d) any other features that are distinctive of this thrust zone.

ANSWER:

REQUEST DDR PRODUCTION NO. 4: If all of the evidence is not shown on Appendix H or described in Appendix G, please provide the maps and field. notes that show and describe the evidence upon which each of the following geological maps is based:

1) 3.1-14,
2) 3.1-15,
3) 3.1-16, and
4) 3.1-17.

INTERROGATORY NO. 17: Page 3.1-29 s tates that the Dar-rington phyllite on Cultus Mountain has prominent and pervasive kink bands, crenulations, and quartz veins and pods. Please show the location and orientation of the king bands of discordant quartz veins on Appendix H, Figure 3.1-12, or Figure 3.1-14.

AN SWER:

1269 100 INTERROG ATORY NO. 18: What other localities (other than the locality mentioned on p. 3.1-29) within the area of Appen-dix H have prominent kink bands and discordant quartz veins?

Flease give the strike and dip of these features at each locality.

ANSWER:

INTERROGATORY NO. 19: Page 3.1-29 s tates that the Shuksan f ault as shown on Figure 3.1-12 and 3.1-14 is a zone marked by intensely sheared rock, serp ent inite, and altered serpentinite.

Please show the geographical extent of this zone on Figures 3.1-12 and 3.1-14 and the strike and dips measured on rocks within this zone.

ANSWE R:

1269 101 INTERROGATORY NO. 20: Cross section A-A of Figure 3.1-13 shows structures and lithologies in the Shuksan plate that do not appear on Appendix H (which, according to Note #1 is the source of the data for Figure 3.1-13) . Please explain the source of the data for the following:

a) the antiform and synform shown in the Shuksan rocks underlying the Cultus mountain, b) the stippled unit shown in the Shuksan rocks under-lying Cultus Mountain, c) what this stippled unit is, and d) the synform shown in Shuksan rocks in the valley of Day Creek.

ANSWE R:

INTERROGATORY NO. 21: To draw the eastward dipping zone of the Shuksan thrust fault shown on Profile A-A of Figure 3.1-14, marker units must have been recognized in adjacent holes (or in all three holes). Please describe these units, give their intercepts in each hole, and shown them on a cross section through the holes.

ANSWER:

1269 102

INTERROG ATORY NO. 22: Please show on Figures 3.1-15 and 3.1-16 the features that are discussed on pages 3.1-34 to 3.1-36:

a) the strike and dip of quartz stringers, highly crenu-lated foliation planes, and zones of contortion of the Darrington phyllite, b) the geographic extent, and the strike and dip of the contacts of tectonic inclusions within the Shuksan thrust plate within the alldged Church Mountair. plate in the southern half of sections 5, 8, and most of the western half of section 9, T34N, R6E, c) the geographic extent, contacts, and strike and dip of the rocks of the prominent greenstone ridge that extends from Little Haystack Mountain through the west side of section 9 nearly to Rocky Creek, d) all of the several folds mapped in the metasediments in the southwest quarter of section 5 north of Little Haystack Moun-tain, e) the geographic extent, contacts, and the strike and dip of the contacts and of rocks in the several tectonic blocks that are well exposed in the SW/4 section 9, 1269 103 f) the strike and dip of the contact between the Shuksan plate and the serpentinite that is clearly f aulted f rom Rocky Creek to the gap between Little Haystack Mountain and Talc Mountain, especially in Section 9, and g) the geographic extent, contacts, and strike and dips of any other units or outcrops in the areas of Figure 3.1-15 and Figure 3.1-16 that are not shown on Appendix H. (One example might be the zone of intensely sheared rock at the base of Shuksan thrust as mentioned on pages 3.1-29 for other areas and as requested in Interrogatory No. 16).

ANSWER:

INTERROGATORY NO. 23: Please explain the reasons for the difference in the mapped location of the northern part of the major serpentinite belt in Figure 3.1-15 and in Appendix H.

If the strike and dip of the contacts and of the rocks ad-jacent to and within the serpentinite belt are available but are not shown on Appendix H, please showp" them on Figure 3.1-15 or the map requested in Interrogatory # 8.

ANSWER:

1269 104 INTERROGATORY NO. 24: Profile A-A of figure 3.1-16 indi-cates that TH-3C and TH-3B penetrated two bodies of serpentinite within the Shuksan thrust plate. Please indicate where these units are describeed in the core logs of Appendix G.

ANSWER:

s 7, +n 1, ' .

INTERROG ATORY NO. 25: Page 3.1-37 and Appendix G indicat  ;'

that hole TH-3C penetrated more than 90 feet of serpentinite.

Please explain how this serpentinite is known to be the sam.

one that is shown on the map on Figure 3.1-16. fi ANSWER:

1..

1269 115 REQUEST POR PRODUCTION NO. 5: The Applicants ' geological interpretation of South Chucaknut Mountain remains substantially different than Schmidt 's (1972). EDCON's interpretation of the aeromagnetic pattern over South Chuckanut Mount (Appendix A, Fi-gure 23A to 23D) is presented at a scale of 1:24,000. Please sub-mit a ggeological map with a scale of 1:24,000 (or larger) that shows the Applicant's interpretation of the geology and which was used as the geological base for EDCON's 1:24,000 study. Because part of the aeromagnetic pattern extends f rom Dogfish point on the northwest to Whitehall Creek on the south, a geological map at a scale of 1:24,000 (or larger) of all T36N/R3E is requested.

INTERROG ATORY NO. 26: EDCON's interpretation that Goat Mountain is a body of ultraf amic rock that dips southwesterly 60 to 70* (Appendix A, p. 44) is different than the interpretation of Thompson (1973), Christensen (1971), and Thompson and Robinson (1975) that the much larger Twin sisters body immediately to the north is essentially a flat lying slab only a kilome ter- or two thick. Please explain the reason that EDCON came to such a different conclusion.

Also please submit any geological map on a scale of 1:62,500 (other than Appendices H and I) or larger that the Applicant may have that supports EDCON's interpretation of the aeromagnetic data. This map should delineate the zones cf serpentinization as these will drastically af fect the magnetic signature of the body and the interpretations based thereon.

1269 106 ANSWER:

INTERROGATORY NO. 27. Please submit a geological map with a scale larger than 1:62,500 covering the area on Lyman Hill with a one mile radius beyond the mapped po'rtion of the greenstone in Section 24, T36N, RSE that is shown in Appendix H.

Secondly in addition to Figure 22B and 22C of Appendix A, please indicate the best possible fit of a calculated magnetic response to the observed response of the body in Section 25 that can be generated by varing (a) the thickness of the body from 250 to 500 feet, (b) the length of the body in a northwesterly direction from 0.5 to 1.25 miles, and (c) the width of the body from 0.25 to 0.5 miles in a northeasterly direct. Assume during this modeling that the body is roughtly tabular and that it dips no more than 20* in any direction.

ANSWE R:

1269 107 INTERROGATORY NO. 28: Please provide the best two alterna-tive 2 dimensional models to explain aeromagnetic high in sec-tions 11, 12, 14 and 14, T 35N, R 4E and the adjacent aeromagnetic low to the northwest.

ANSWER:

INTERROGATORY NO. 29: Please explain what criteria the applicants used to distinguish Darrington phyllite from the pelitic rocks of the San Juan Islands. That is, if both rocks occurred within the same area, what criteria could be used to tell them apart?

ANSWER:

1269 108 INTERROGATORY NO. 30: Please explain the basis for the state-ment on page 3.2-3 that if a normal f ault were parallel to Gilli-gan Creek, it "would require a minimum of 1500 ft. of down-on-the eas t displacement".

Please provide the nume rical value (or range of va.'ues) of the dips, amount of apparent offsets, and other data that were used to calculate the 1500 feet of displacement.

ANSWER:

INTERROGATORY NO. 31: Assuming that the Gilligan Creek fault does axist in the location shown by Whetten (Figure 3.1-11) but that the Shuksan thrust plate dips in the direction opposite to that shown by Whetten (that is, about as shown in the PSAR Interpretation and the Vance Interpretation of Figure 3.1-11),

please calculate the maximum and minimum possible of fsets of the Gilligan Creek f ault for two possibilities:

a) if it were a high angle (predominantly dip-slip) f ault; b) if it were a strike-slip f ault.

l269 109

Thus, four calculated offsets are requested. Please provide the numerical valuec of the dips, amount of apparent offset, and other data used to make each of these four calculations.

ANSWER:

INTERROGATORY NO. 32: Please draw a non-diagramma tic (i. e.

actual) cross section along A-A of Figure 3.1-12 (to replace A-A of Figure 3.1-13 ) . Please extend this cross ection to the same depths as shown in cross section A-A of Figure 3.1-13. Because this cross section is within the area of the compilation map reques ted in Interroga tory No. 8, please present this cross section at a scale of 1:24,000.

ANSWER:

1269 110 da

INTERROGATORY NO. 33: Please provide a geological map of the glacial sediments referred to en pages 3.2-5, 3.2-8, and 3.2-12.

The scale of this map should be the same as Figures 3.2-2 and 3.2-3.

ANSWER:

INTERROGATORY NO. 34 : Please indicate the location and ori-entation (strike and dip symbols) of the following on Figure 3.2-2:

a) the kink banding and isoclinal folding of intervals of Darrington phyllitementioned on p. 3.2-2, b) the deformed glacial clays shown in the NW/4 section 35, at the mouth of Gilligan Creek; c) serpentinites in Section 13 adjacent to Gilligan Creek that are shown on Appendix H, d) belts of greenschist or other lithologies within the Darrington phyllite.

ANSWER:

1269 111 INTERROGATORY NO. 36: Please indicate which geologists mapped which op' rtions of the area of Figure 3.2-2 and when each mapping project was conducted.

ANSWER:

1269 112 INTERROGATORY NO. 36: A comparison of Figure 3.2-2 and 3.2-5 indicates that the lineation labled 4 in Section 31 (in the upper Bear Creek drainage) is not coincident with the edge off the Bear Creek slide as stated in the Explanatiion to Figure 3.2-5. Please provide another explanation for this lineation.

ANSWER:

INTERROG ATORY NO. 37: Please present all figures ia Appendix B (which show ground magnetic lines) at the same scale.as the geological maps with which they are to be used. For example, Figures B-5 and B-6 should be presented at the same scale as Figures 3.2-2 and 3.2-5, Figure B-4 should be at the same scale as Figu re 3.2-10, etc.

ANSWER:

1269 ii3 INTERROGATORY NO. 38: With regard to the ground magnetic survey discussed on page 3.2-14, please explain what type of magnetic anomaly was anticipated near the mouth of Gilligan Creek where Darrington phyllite would be f aulted agains t Dar-rington phyllite according to the Whetten Interpretation of Figu re 3.1-11.

With regard 'to the anomalies detected near the mouth of Gilligan Creek, they are reported to be related to terrain effects or other near surface features (pages 3.2-14 and B-7).

Please explain what these other near-surface features are and where they are on specific traverses.

ANSWER:

INTERROGATORY NO. 39: With regard to the gravity survey across the mouth of Gilligan Creek mentioned on page 3.2-14, please indicate the depth to bedrock beneath isogals 32 and 29 (at the edge of the Skagit River) and calculate the maximum 1269 114

offset that could occur in the bedrock at those depths that would remain undetected by the gravity survey.

ANSWER:

INTERROGATORY NO. 40: Figu res 3.2-10, 3.1-17 andk 3.4.3-1 are almos t identical in scale and show the same geological units, but within their area of overlap they differf somewhat.

Please combine these three maps into a single map a.t a scale of approximately 1:24,000 and indicate which of the three current maps is pref erred and why.

AN SWE R:

1269 i15 INTERROGATORY NO. 41: With regard to the shear zone men-tioned at the bottom of page 3.2-17, where in figure 3.2-10 are the overlying Chuckanut strata along the strike of this shear that the shear allegedly does not cut?

If these strata are beyond the limits of Figure 3.2-10, please enlarge the areal extent of Figure 3.2-10 to include the Chuckanut strata.

ANSWER:

INTERROGATORY NO. 42: With regard to the ground magnetic survey discussed in section 3.2.5.4 on page 3.2-18, please ex-plain what type of magnetic anomaly was anticipated near the mouth of Day Creek where Darrington phyllite would be faulted against Darrington phyllite.

ANSWER:

1269 116 INTERROGATORY NO. 43: Please indicate the thickness of unconsolidated sediments over bedrock along the traverse shown in Figure B-4 and evaluate the ef fect of this variable thickness on the profiles shown.

ANSWER:

INTERROG4 TORY NO. 44: Please indicate on the map compiled f com Figures 3,1-17, 3.2-10, and 3.4.3-1 (as requested in In-terrogatories No. 8 and 40 15), or on an overlay at the same scale, the location of the flight lines of the LKB aeromagnetic survey that are shown in Figure 17 of Appendix A.

In addition, please show on the map compiled from the above figures (or on an overlay at the same scale) the location of the ground magnetic surveys shown in Figare B-1.

ANSWER:

\269 \\7 INTERROGATORY NO. 45: Please provide all of the ground mag-netic profiles indicated on Figure B-1 that are not currently included in Appendix B. Please draf t these profiles at the same scale as the larges t scale geological maps available (or as overlays for these maps).

ANSWER:

INTERROG ATORY NO. 46: In the gravity survey mentioned on page 3.2-18, please indicate the depth to bedrock beneath isogals 28 to 34 where they cross Day Creek and calculate the maximum offset in the bedrock at those deptb- -hat would remain undetec-ted by the gravity survey.

ANSWER:

1269 118 INTERROGATORY NO. 47: Please provide the following infor-mation on each of the aeromagnetic highs (except Butter Hill and South Chuckanu t Mountain) with more than 100 gammas of closure on that part of Appendix I southwest of a northwesterly line drawn through the southwestern part of the town of Sedro Woolley:

a) the composition, depth, and orientation of alternative models for the causitive bodies, b) maps similar to 22B, 22C, 23B, 23C, 23D of appendix A for the observed high and for the alternative models of each high.

NNSWER:

REQUEST DDR PRODUCTION NO. 6: On page 3.4.1-2 and on Figure 3.1-4 personal communications are attributed to Peter Misch.

Please provide the follow information:

a) the person to whom each personal communication was addressed, b) the date of each personal communication, c) the text of this communication if it was written, and d) if the text of the communication was not written, please have Peter Micch write an appropriate text that also includes the evidence fc his conclusions.

I269 119 ANSWER:

INTERROGATORY NO. 48: Please show on Figures 3.4.1-1, 3.4-2, or 3.4.1-3 the linear features that are discussed on page 3.4.1-3.

ANSWER:

e 1269 120 REQUEST FOR PRODUCTION NO. 7: Please provide the field notes, field maps, and compilation of maps of the geological mapping mentioned on page 3.4.13 as having been done for the 1978-1979 s tudy. Please name all of the persons who conducted this mapping.

REQUEST FOR PRODUCTION NO. 8: Please provide the log of the telephone call of April, 1978 to Dr. Peter Ward (see pages 2.4.1-5 to 3.4.1-6).

INTERROGATORY NO. 49: With regard to the geology of the No Name Creek area depicted in Appendix H and Figure 3.4.3-1, please describe the following:

(a) any mappable units that were recognized within the Chuckanu t formation, (b) any mappable units that were recognized within the Chuck anu t formation, (c) any mappable units that were recognized in the al-leged " church Mountain plate",

(d) any faults other than the Shuksan thrust were recog-nized, and (e) whether any attempt was made to trace any of the fea-tures described in (a), (b), (c), or (d) along strike away f rom No Name Creek.

AN SWER:

}2bh INTERROGATORY NO. 50: Page 3.4.2-4 states that " Surface sediments have been incorporated into the flow complicating the internal structure. . . No shearing or slikensides were found in the andesite dike-rock which constitutes the bulk of the knob, in which the sheared flow rock occurs."

Does this description include the nob of volcanic rock la-beled "Ev" shown near the center of Section 14, T 33N, RSE? If not, please identify the location of the knob described above.

ANSWER:

INTERROGATORY NO. 51: Please explain the significance of the following features that occur in the knob of volcanic rock in Section 14, T 33N, RSE:

(a) the large slickensided joint that strikes approximately N30*W and dips approximately 70*NE near the top of the quarry, (b) the tectonic lens of volcanic rock bounded by sheared argillite near the top of the talus in the western part of the quarry (the shear bounding the upper part of the lens strikes about N3 0*W and dips about 3 0* NE, (c) the shear that strikes about N20* E and dips about 50' NE across the eastern part of the quarry, and

}2b9

(d) the pervasive fracturing and local hydrothermal altera-tion of the rocks in the quarry.

AN SWER:

INTERROGATORY NO. 52: In the discussion of the age of the Chuck anu t formation starting on page 3.4.1-6 reference is made to the Comox formation and to Ward 's stratigraphy, neither of which are included on Figure 3.4.1-5 entitled " Stratigraphic Relationships Nanaimo and Chuckanut. " In order to evaluate the age of the Chugkanut, please include the following on Figure 3.4.1-5:

a) Comox formation, b) Ward 's stratigraphy (1978) including his concept of the relative age of the Chuckanut formation and the Ex-tension formation, c) the relationship to the faunal stages of che Upper Cretaceous or the Paleogene that each author assigns to the formation shown, d) the relationship of the DeCoursey formation to the Chuck anu t forma tion (page 3.4.1.9 ) ,

e) which formations in the table are continental-deltaic deposits (page 3.4.1-10 states that Table 3.4.1-5 shows which deposits are continental-deltaic deposits, but this is not shown on the table).

f) the constraints on the age of the Chuckanut formation imposed by sample 26 of Table F-1.

N4 SWE R:{g }}} INTERROGATORY NO. 53: Page 3.4.1-9 s tates that Bechtel con-ducted mapping in the San Juan Islands. Please provide the fol-lcring: a) the names of all geologists (including paleontologists) involved in the mapping, b) the paleontological and lithological criteria for iden-tifying each of the formations that were mapped or studied, and c) the names of any paleontologists that advised the Appl-cant in any way. ANSWER: REQUEST FOR PRODUCTION NO. 9: Please provide all field notes, field maps, and compilation maps, and all other documents produced by the geologists (including paleontologists) named in the response to Interrogatory No. 53. INTERROGATORY NO. 54: On pages 3.4.1-8 to 3.4 1-10 and on Figure 3.4.1-5 a number of authorities are cited on the a 'naimo strata and the Chuckanu t formation. These include the Bechtel n

employees to be named in the foregoing interrogatory and the following consultants to the Applicants: Miller, Misch, Vance, and Easterbrook. Plea 3e have each of these authorities provide in writing: (a) both the paleontological and the lithological cri-teria that they use for correlating the Chuckanut forma-tion with any part of the Nanaimo group, (b) Their reasons for disputing any of the correlations attributed to Ward in Section 3.4.1.3 or made by him in his letter of 5 December 1977, or in his 1978 article, and (c) their evaluation of Ward's assertion in his letter 5 December 1977 that "... there has never been any discovery of Nanaimo fossils on. the mainland of British Columbia or in Washignton S tate. The report of Mathews (1958 of Inoversamus schmidti from Mt. Garibaldi was a misidenti-fication..." ANSWER: 1269 125 tLU 6L f

INTERROGATORY NO. 55: Pages 3.4.1-10 and 3.4.1-11 and Fi-gu re 3.4.1-4 imply that the Chuckanut formation is coeval and on strike with the Gabriola formation. Please discuss all possible structural implications .of these relationships, especially if these formations are correlative (coeval) but not equivalent. ANSWER: INTERROGATORY NO. 56: Please describe any instrumental methods that were used to determine the altitudes of any corre-lative strandlines (see page 3.4.1-15). Please provide the names of the persons who performed these instrumental determin-ations. Please provide references to any publication or report that cites any instance in which the altitudes of correlative strandlines have been ins trumentally determined within an error less than 10 feet. ANSWER: 1269 126 INTERROGATORY NO. 57: With regard to Appendix H, please explain the following: a) the criteria for including the Tertiary units in T 33 N west of Interstate 5 within the Chuckanut formation, b) the reason for reversing the barbs on the thrust fault shown by Schmidt (1972) on south Chuckanut Mountain, especially as the photograph he labels Figure 20 shows Yellow Aster complex over phyllite, c) the location of unit Mn (which is listed under "Geo-logic Units" on the explanation to Appendix H) . d) the reason for the omission of the fault that trends southeasterly from Chuckanut Bay through Chuckanut strata and which is shown on Figure 3.1-3, Figure 2 of Miller and Misch (1963), and Figure 2.5-4b of Amendment No. 19 of the PSAR). e) why the areas of outcrop of the Chilliwack group rocks north of the confluence of Rocky and Day creeks and of Chuckanut strata north of Day Lake that are shown in Figure 3.1-3 are not shown, f) why the ridge to southwest of the upper portion of Day Creek (near Day Lake) is shown as Church Mountain thrust plate but is shown as being underlain by rocks of the Shuksan plate in Figure 3.1-3, g) why the outline of the alleged Shuksan thrust near Table Mountain is substantially different than as shown on Figu re 3.1-3. h) why in the vicinity of Devils Mountain map unit Ev appears to be in contact with (and presumably overlies) the Chuck anu t forma tion; whereas on Figure 3.1-3 what appears to the the same " Eocene silicic volcanic and sedimentary rocks" are in contact with rocks of the Chuch Mountain plate, i) why the contact between rocks of the Shuksan Plate and Chuckanut strata is shown as a depositional one in section 17, T 33 N, R 7 E; whereas in Figure 3.1-3 the same contact is shown as a fault, j) why the rocks in the NW corner of Section 18, T 33 N, R 7 E are thought to be Tertiary grantic rocks; wht eas in Figu re 3.1-3 these are shown as rocks of the Church Moun-tain plate, 1269 127 k) the distinctive nature of the descriptions of the cutt-ings at a depth of 700 feet in the well i.n section 32, T 36 N, R4E that permit the rocks to be identified as Darrington phyllite rather than pelitic rocks within the Chilliwack group or within the San Juan rocks,

1) why the area of outcrop of greens tones anc' serpentin-ites on the northwestern side of Lyman Mountain and at Mt.

Josephine are so much smaller than as shown in Figure 3.1-3, and m) the tectonic significance of serpentinite mapped within the Chuckanut formation. The following suggestion is made as an aid in responding to this interrogatory: Rather than submitting a written answer to some portions of this interrogatory, it may be si;npler to revise Appendix H (as is also suggested in Interrogatory No. 58) and then to note that the answers to specific parts of this inter-rogatory can be found on the revised map. ANSWER: 1269 128 INTERROGATORY NO. 58: With respect to Appendix H, please show or provide the following: a) formational labels for the following outcrops or units: Portion of Township Range Section Section North East

1. NE NW 4 33 5
2. E half 14 34 6
3. SW NE 29 34 5
4. units en south edge of map 7& 8
5. center 7 33 6
6. SW 31 33 7
7. NE 32 33 7
8. SE 12 33 6
5. SW 7 33 7
10. 54 3 36 3
11. S edge 29 35 5
12. center 22 33 7
13. NE SW 19 35 8
14. 28 35 8
15. NW 7 35 8
16. NW 13 36 6
17. SW -

12 36 6

18. SW 18 36 6
19. NE 26 36 6
20. SW 24 36 6
21. NE 13 36 3
22. NE 20 34 7
23. center NE 13 33 4
24. SW 6 33 3
25. SE 36 34 2
26. SE NE 23 33 7
27. NW 33 37 6
28. SE SW 7 36 6
29. 9& 10 32 5
30. 28 & 33 33 5
31. NW SW 10 33 7 b) how the queried contacts in S~ections 19 and 30 of T 33 Range 8 E continue to the east, c) resolutions of discrepancies between the present ver-sion of Appendix H and other geological maps in the 1978-1979 report, d) delineation of the Darrington phyllite from the Shuksan greenschist within the Shuksan thrust plate. Note that pages 3.1-25 to 3.1-26 state that the greenschist "is mapped generally in the southeast part of the map area (see the geologic map in appendix H)". Note also that the greenschist is shown on the smaller scale map of Figure 3.1-3 (Sheet 1) and also is shown by Morrison .(1977) and Wilson (1978).

Thus, this information must be available. This portion of this inte rroga tory , therefore, also applies to the 1:24,000 Map of the bedrock requested in previous interrogatories). e) delineation of the Chilliwack group roe'cs from Mesozoic rocks, especially Mesozoic rocks of San Juan af finities, in the alleged Church Mountain thrust plate (this portion of this interrogatory probably also applies to the 1:24,000 map of the bedrock requested in previous interrogatories) f) delineation of " Tectonic slices of metaplutonic rocks, Pre-Dev. - Mesozoic (?)" from other rocks of the alleged Church Mountain thrust ~ plate as is done in the smaller scale map of Figure 3.1-3 and by Miller (1979, in, press). g) the position of the greenschist belt which page E-19 States that " Field observations indicate that the belt is probably bounded by tectonic contacts. . . Geologic Map, Appendix H) . " ANSWER i269 130 T 1 4 INTERROGATORY NO. 59: In Appendix D Miller states that "All of the structures can be related to either the mid-Cretaceous or Eocene orogenies...", but in the preprint of his paper entitled 

       " Western extent of the Shuksan and Church Mountain Thrust Plates" he states (p. 3) clastic deposition "was followed by mild folding and f aulting of probable Miocene and younger age. "

Please explain what appears to be a contradiction in these two statements. ANSWER: INTERROGATORY NO. 60: Please explain the following apparent anomalies on Figure 3.1-3 and make any corrections to Appendix H that may be required by these explanations: a) the apparent thrusting of the Church Mountain plate over the Shuksan greenschist in the area adjacent to the north-eastern border of Sheet 2, b) the repetition of the Shuksan thrust east of Deer Creek on Sheet 2 1269 131

c) the curved traces of the f aults that bound the Church Mountain rocks at Mt. Josephine (such a configuration would seem to preclude a hors t, and barbs are needed if these faults are imbric~ ate thrusts). ANSWER: INTERROGATORY NO. 61: Page 3.4.2-3 states that geologic mapping has be~en done by Bechtel geologists in Walker Valley since April 1978. Please name all persons who conducted this mapping and describe their geographic and geological areas of responsibility. ANSWER: REQUEST P3R PRODUCTION NO. 10: Please provide the field notes, field maps, compilation maps and other documents pro-1269 132 4 duced during the geologic mapping ntoed in Interrogatory 1;o. 61. INTERROG ATORY NO. 62: Please submit a sufficiently de-tailed geological map on a scale of 1:24,000 or greater that will verify the following statements: a) w ith regard to the N 7 0* W fault mapped by Lovseth (1975) and Jenkins (1924) "nearly continuous, unfaulted exposures of Chuckanut sandstones and minor siltstones cross this projection without evidence of f ault of fset" (p. 3.4.2-3), b) with regard to Lovseth 's N 3 0* W linear segment, " map-ping demons trates that the contact is not as linear as Loveseth indicated; rather it curves in a repeated S-shaped pattern..." (p. 3.4.2-4), c) with regard to the N 30' W contact "that similar vol-canics... locally cover or interrupt the contact, without apparent offset" (p. 3.4.2-4), d) with regard to Lovseth's N 30' W fault segment "The Devils Mountain f ault zone crosses this projection. . .with-out offset" (p. 3.42-5)., and e) with regard to Oligoncene conglomerates on Frailey Mountain on strike with Lovseth's N 30' W fault segment, "they are not disrupted by northwest-trending faulting" (p. 3.4.2-5). In addition, this map should have sufficient detail to refute the following: f) "All lineations associated with the [ Devils Mountain] fault zone are interrupted and discontinuous including the most prominent feature... The lineation is clearly inter = rupted on the imagery for about one mile. The eas ternmos t segment of this lineatior.... terminates against ridges, found by field mapping to be formed by conglomerate." (PSAR Amendment No. 11, p. 2.5-10c), g) with regard to the Tertiary volcanic rocks, Lovs e th 's statement (see Cheney, 1978, p. 22) that these rocks are cut by northwesterly trending shears. In addition, Aero Service Aeromagnetic Sheet 1 (proprietary Figure 8 of Appendix A) with the location of the flight lines indicated upon it is requested as an overlay to the geological 1269 133

map of this area in order to verify the discussion of the fol-lowing on p. 3.4.2-5: h) the coincidence of a sinuous aeromagnetic gradient with Lovseth 's N 3 0* fault, and i) the coincidence of Lovseth and Jenkin's N 70* W fault with the strong N 60 to 70* W gradient (The discus-sion of the aeromagnetic patterns mentioned in (h) and (i) should include calculated models to evaluate the depth, composition, and orientation of the causitive bodies, including the possibility that the N 70* fault is not as steep as Lovseth inferred), j) the lack of any interruption of the isogammas along the Devil's Mountain f ault on striike with the N 30' W trend In addition, Amendment No. 19 of the PSAR includes a report by Harding-Lawson Associates on ground-based gravity and magnetic surveys in this area. This information should be discussed, the location of traverses shown on the overlay requested above, and the profiles o'f Harding and Lawson should be presented at a sale of 1:24,000. AN SWER: 1269 134 INTERROGATORY NO. 63: Please show Figure 3.4.3-2 at the same scale as the map and cross sections requested in Interroga-tory No. 8. Do not make any portion of the cross section diagramtic. Show the Darrington phyllite and the Shuksan greenschist as separate units. Show any other units that the respons es to . Interrogatories No. 8 and 57(e) indicate to be present. ANSWER: INTERROGATORY NO. 64: Page 3.4.3-7 points ou t that the PSAR concludes that the " anti-slope scarps" or "sackung" f eatures along the S traight Creek f ault are not of tectonic origin. Howeve r, McClearly, Dohrenwend, Cluff, and Hanson (1978, Straight Creek Fault study zone, a report prepared by Woodward-Clyde Consultants for United Engineers and Cons tructors, INc., as part , of the WPPSS study of the 1872 earthquake, 72 p.) tentatively came to the opposite conclusion. Please evaluate each piece of 1269 135

evidence that McClearly, et al. tentatively advance in favor of a. 

                                                                          ~

tectonic origin, and document where Bechtel's evidence is more extensive and more definitive that than of McClearly, et al. AN SWER: INTERROGATORY NO. 65: Assuming for the moment that the "sackung" features described in section 3.4.3 are tectonically induced, to what known or hypothesized f aults could they be related? ANSWER: 1269 136 s INTERROGATORY NO. 66: According to page 3.5-4 and page 52 of Appendix A, Anomaly #5 is caused by a 15 to 20 foot thick ferruginous schist (hereinafter referred to as a banded iron formation or BIF) at or ner the surface, and Anomaly #3 is caused by a similar body. Please explain the following: a) where EDCON's report states that the causitive body of Anomaly # 3 plunges from 500 feet to 4000 feet below the surface (see page 3.4-4), b) how such a thin, discontinuous, impure BIF at such great depth could create an anomaly as large as #3; whereas bodies closer to the surface in the Finney Creek area (described by Morrison, 1977) do not' generate such a big anomaly on appendix I, c) how thick and how long a BIF would be required at depths of 500 to 4000 feet to generate Anomaly # 3, d) the evidence that the Chuckanut rocks at the plant site are in a northwestward plunging syncline (see page 3.5-4), , e) why the magnetic body had to be emplaced prior to folding of the Chuckanut; for example, why can't the anomaly be a mafic or ultramafic rock emplaced along a fault. Because Shedd (1922) and Morrison (1977) indicate that the BIFs are close to the contact between the Darrington phyllite and the Shuksan greenschist, this contact must be mapped to evaluate the hypothesis that a BIF is the causative body. Thus, the area surrounding ths anomaly as well as the contact else-where should be included in the area to be mapped at 1:24,000. AN SWER: 1269 137 INTERROGATORY NO. 67: If the Devil's Mountain f ault is a southward dipping normal fault as stated on page 3.5-5, how ca.n the "aut.achthonous" rocks below the alleged Church Mountain plate occur at the surf ace on the south side of the f ault; that is, how can structurally lower rocks occur at the surface on the downthrown side of the fault? ANSWER: 1269 138 INTERROGATORY NO. 68: Please provide an explantion for the following relative to the Devils Mountain f ault: a) why the aeromagnetic anomalies bend southeastward as they approach the fault from the north (see Appendix I) b) why lineations bend southeastward as they approach the fault from the north (see Figure 3.2-6) and c) why the " autochthonous" rocks south of the fault bend northwestward as they approach the f ault from the sou th ( s ee F igu re 3 .1-3 ) . ANSWER: INTERROGATORY NO. 69: Please explain the ways in which the gravity survey described in Appendix C is superior to the one conducted by Smith and Foxhall (1976, Appendix 2M, Amendment No. 11 of the PSAR), and, conve rs ely , the aspects of the survey by Smith and Foxhall that are superior. Explain whether it is practical or not to combine the re-sults of these two surveys into a single map. ANSWER: 1269 139 INTERROGATORY NO. 70: Please include the results of Easter-brook's study of 3 April 1979 in Appendix D on the previously re-questei 1:24,000 map of glacial sediments. AN3WER: INTERROGATORY No. 71: The following pertain to the report of Easterbrook in Appendix D dated 3 April 1979. Please explain or provide the following: a) the location on Figure 1 (or other appropriate figures) of the several outcrops that were used to compile the com-posite section shown in Figure 3 (this information could be supplied on the 1:24,000 map of glacial sediments) b) how cuttings from auger holes can be used to determine whether sediments have been overriden by ice. c) a discussion of the discrepancies, if any, and the rea-sons for theae discrepancies, between the logs of adjacent USGS and Bechtel auger holes 1269 140

4 d) the altitude of the collar of each auger hole, e) Dr. Easterbrook's logs of each hole, f) the following additions to Figure 4,

1) an explanation describing the patterns used to describe the various types of sediments in each hole,
2) the hole number for each log shown, and
3) a datum of 895 feet showing the altitude of the collar of each hole, g) the location, extent, and thickness of the morainal ridge that is reported to be 1/2 mile west of the auger holes h) a description of the processes that commonly are thought to generate " flow tills, "

i) the units that unequivocally correlate from hole No. 20 through 21, 22, and 23 below a depth of 25 feet, thereby indicating lack of offset, j) depiction of the synclinally folded units on Figura 4, k) the evidence (including 14 C ages and detailed stratigraphic studies) that the basal till encountered in the auger holes is Vason as assumed on page 7.

1) the maximum of fset that could occur in the basal till (but not the overlying sediments) that could escape detec-tion between holes 1 to 20, between 25 and 1, and between 20 to 23, m) the orientation, location (both on the requested 1:24,000 map and on Figure 4) and origin of the fractures described as having 1 to 4 feet of displacement.

n) a geological map showing the extent and orientation of the units shown in the composite section (Figure 3) and in Figure 4, o) Dr. Easterbrook's geological cross section drawn through the drill holes, and any other cross sections he drew through the area of the geological map requested in (n) above, 1269 141

p) the thickness of the till penetrated in holes 21, 22, 23, and 25 compared to the thickness of the upper till penetrated in holes 1 to 20, q) the lithological criteria that can be used to dis-tinguish the till encountered in holes 21, 22, 23, and 25 from the till encountered at about 20 feet in holes 1 to 20, and r) a correlation of the sediments below the till penetrated by holes 21, 22, 23, and 25 with the sediments below the till encountered at about 20 feet in holes 1 to 20. ANSWER: 1269 142

INTERROGATORY NO. 72: Table F-1 and Figure F-1 do not ade-quately locate the rocks that have been dated. For example, sample 2 6 reputedly was collected f rom Section 2, T3 3 N, R 7E: yet no outcrop symbol for a grantic rock occurs in that section on appendix H; so it is difficult to evaluate the significance of the sample and impossible to collect a duplicate sample. Thus, this interrogatory requests that dated samples be identi-fied on the detailed maps requested in earlier interrogatories. ANSWER: INTERROGATORY NO. 73: Page F 2 states that a search for radiolaria was unsuccessful. Please indicate which outcrops were investigated, the methods used to search for radiolaria and the names of the persons who collected, processed, and examined the specimens. Please provide the professional qualifications of these persons. AN SWER: 1269 143 INTERROGATORY NO. 74 : With regard to petrographic ex-aminations of the thin sections of dated rocks please provide the following: a) the name of the persons who examined the thin sections, b) the prof essional qualifications of these persons, c) the petrographic descriptions of the thin sections. The sample numbers of the thin sections range from 1 to 33. Few such numbers appear to be present in Table E-2. If this is not the case, please indicate which samples in E-2 were dated. O the rwis e, the simplest way of responding to this interrogatory might be to include the dated samples in Table E-2. ANSWER: 

                                                \

INTERROGATORY NO. 75: Please provide the names of the formations f rom which the samples were collected for dating. This is done for a few samples in the text, but needs to be done for all samples in Table F-1 and Figure F-2 (or in a single table that includes the formational names, petrographic descriptions, and the information r.aw appearing separately in Table F-1 and Figure F-2) . ANSWER: INTERROGATORY NO. 76: Which of the three samples dis-cussed in Section 4.1.2 is deuterically altered? ANSWER: 1269 145 INTERROGATORY NO. 77: What are the Eocene volcanic rocks on the San Juan Islands that are referred to on the bottom of page F-9? INTERROGATORY NO. 78: Which of the pre-Tertiary igneous rocks listed in Table F-1 retain enough of their original mineralogy and texture to suggest that K-Ar age may approximate the true age of the rock? Note that this interrogatory might be satisf actorily answered by a satisf actory response to Interrogatory No. 74-ANSWER: 1269 146 INTERROGATORY NO. 79: Which of the pre ~1ertiary rocks listed in Table F-1 have been dated by other means by other authors? If the results of Table 1 and the other authors yield concordant dates, what is the significance of these concordant dates ? ANSWER: INTERROGAITORY NO. 80: With regard to the lithological logs of the drill holes accompanying Appendix G, please supply the following: a) the names and professional qualfications of the persons who logged each hole (or parts of a hole), b) the names and professional qualifications of the persons who assigned formational names to the litho-logies described in the logs (The formational names do not occur on the logs but had to be assigned for such Figures as 3.1-14, 3.1-15,, 3.1-16, 3.1-17, etc.), c) so that no uncertainty can arise about which lith-ologies have ben assigned to which formation or mappabla unit, logs of each hole are needed that state the inter-cepts of each formation and mappable unit and of all shear zones, mylonitic zones, or faults of sufficient importance to be shown on Figures in the PSAR or the 1978-1979 Report. ANSWER: 1269 i47 INTERROGATORY NO. 81: As a result of the gravimetric survey of Appendix C, it must be possible to revise a portion of the State Bouguer Gravity Map (Bonini, Hughes and Danes, 1974, Wash. Div. Geology and Earth Resources, Geologic Map GM-12), and thereby improve the gravimetric evidence for the absence oc presence of structures of regional importance. Therefore, please provide at a scale of 1:500,000 a revision of Bonini et al. between 121* 50 ' and 122*15' West Longitude and between 48'25' and 48*35' North Latitude. A minimum of the following gravity base stations from Plate 1 should be shown: COKBAS, 57, 75, 22, 681, 36, 80, 610, 57, 21, 564, and 67. ANSWER: 1269 148 INTERROGATORY NO. 81: As a. result of the gravimetric survey of Appendix C, it must be possible to revise a portion of the State Bouguer Gravity Map (Bonini, Hughes and Danes, 1974, Wash. Div. Geology and Earth Resou rces, Geologic Map GM-12), and thereby improve the gravimetric evidence for the absence or presence of structures of regional importance. Therefore, please provide at a scale of 1:500,000 a revision of Bonini et al. between 121'50' and ,122'15' West Longitude and between 48*25' and 48'35' North Latitude. A minimum of the following gravity base stations from Plate 1 should be shown: COKBAS, 57, 75, 22, 681, 36, 80, 610, 57, 21, 564, and 67. ANSWER: 1269 149 b

INTERROGATORY NO. 82: Page E-20 makes much of the alleged widespread occurrence of titaniferous augite. Please explain why the trace element composition of the host rocks might not p rove to be more diagnostic of originally similar (or different) protoliths than the presence of titaniferous augite. ANSWER: 

                             ~1269    150 INTERROGATORY NO. 83:   With regard to the petrographic des-criptions of Appendix E, please provide the metamorphic facies of each rock (specify index minerals) or the reasons why a metamor-phic f acies cannot be assigned to the specimen.

Please also include this information in the description re-quested in Interrogatory #74(c). AN SWER: INTERROGATORY NO. 84: If Interrogatory # 83 is not answered, please provide the thin sections of all of the metavolvanic rocks, greenschists, greenstones, and ultramatic rocks described in Tables E-1 and E-2 and rocks of these types that are incleded in Interrogatory # 74(c) . AN SWER: 1269 151 

                                    -6'-

INTERROG ATORY NO. 85: Please provide the following infor-mation with regard to thin section 760-16 described on page E-9 and in Table E-2: a) which of the characteristics described in Table E-2 can be used to identify this rock as Shuksan greenschist, b) the extent (including contacts on the mtp requested in Interrogatory #8) of this biotic rock type, and c) the tectonic significance of this rock type at this locality. ANSWER: INTERROG ATORY NO. 86: With regard to the type of low fre- 

                     ~

quency seismic reflections lines run by MOBIL in the Strait of Georgia and shown on Figure 3.4.1-7 please indicate whether such surveys can routinely recognize faults within the following: a) plutonic igneous rocks and metamorphic rocks, b) metamorphic rocks, including phillites, and c) clastic sedimentary rccks with dips in excess of 40*, In addition please indicate whether such surveys can recognize f aults that juxtapose the following: d) plutonic igenous and metaigneous rocks against meta-morphic rocks (including phillites), e) plutonic igneous and metaigenous rocks against clastic sedimentary rocks with dips in excess of 40*, and f) metamorphic rocks (including phyllites ) agains t clastic sedimentary rocks with dips in excess of 40*. ANSWER: 1269 152

INTERROGATORY NO. 87: Where the answer to any part of Inter-rogatory #86 is yes, please cite an an example of such a record as a Figure published in a well known scientific journal (such as AAPG Bull.) or a textbook. ANSWER: INTERPOGATORY NO. 88: Have the Applicants obtained any age determinations on the sediments penetrated by the high frequency seismic reflection surveys shown in Figure 3.4.1-7 or by the high frequenc, surveys between Wh! bey and Lopez Islands? ANSWER: 1269 153 INTERROGATORY NO. 89: Figure 3.4.1-7 shows the intersection of the inferred " Ward f ault" with MOBIL seismic line 70-9. Dobrin's letter of 15 May in Appendix D implies that near this intersection "the trend of events leads to the identification of the reflections just above "bs .ement" on W-70-9 as Miocene. " Please describe in detail how this identification of Miocene was made on that part of W-70-9 and southwest of the " Ward fault." In answering this interrogatory please include traces of the relevant parts of lines W-70-4, and the entire length of W-70-9, marking the' contact between the middle Eocene and the Miocene in blue and the contact between the Miccene and the Pleistocene in green. ANSWER: INTERROGATORY NO. 90: Referring to Figure 3.4.1-7, in your professional opinion, what is the reason that MOBIL did not run its low frequency seismic reflection lines east of 122' W longitude? ANSWER: 1269 154 INTERROGATORY NO. 91: If the last paragraph of page 2 of Dobrin's letter of 15 May 1979 in Appendix D is considered to be a substantive argument, please describe the traces of the following faults: a) Devil's Mountain (Whetten, 1978) b) San Andreas south Latitude 36' N c) Denali of Alaska d) Hosgri and related faults of California e) Fraser - Ross Lake of British Columbia and Washington f) Fairweather on Land in Alaska g) San Andreas north of 39' N h) Garlock fault of California i) Big Pine of California j) Atacama of Chile k) Tintina - Kaltay f ault of Alaska

1) North Anatolian f ault of Turkey m) Median tectonic line of Japan n) Phillipine fault on northern Luzon Island o) Motagua fault, G uatemala ANSWER:
                                                                    \

l269 155 INTERROGATORY NO. 92: Please clarify the following (from Page 33 of Appendix A): a) what a " geological inhomogeneity" is, and b) what combinations of rock types might gause a susceptibility contrast of 500 x 10-cgs units. ANSWE R: INTERROG ATORY NO. 93: With regard to the samples listed in Appendix 1 of Appendix A, please provide the following information: a) the megascopic difference between samples labeled either "me tavolvanic" or "me taplutonic" and those labeled "greenstone." b) any petrographic descriptions that have been made of thin sections of any-of the samples of sites 1 to 25. c) the name of petrographer who did the petrographic descriptions, d) which of the samples at site 9 are serpentine, e) whether any of the susceptibility values listed for site 9 are typical of serpentinite, f) which rocks at site 10 are metasedimentary and which are metavolcanic, g) whether any of the susceptibility values listed for site 12 are typical of serpentine, h) whether any information is available since October 1978 that causes a reidentification of the rock types at site 12, or at any other site, i) which thin sections (if any) in Table E-2 that correspond to each of the samples BCH-101 to BCH-116. ANSWE R: 1269 i56 INTERROGATORY NO. 94: Please explain why most of the meta-volcanic rocks described in the upper 800 feet of Test Hole 1 A (see Table E-1) are inferred to have been derived from basic, or andesitic protoliths despite the fact that these rocks have more than 10% quartz. ANSWER: INTERROGATOR? NO. 95: The aeromagnetic figures of Appendix A that have been generated by the Applicants are considered to be proprietary for commercial reasons. a) Please explain the specific commercial potential of the area within each aeromagnetic figure that is considered to be proprietary. b) Please provide the name and qualifications of the economic or other geologist or geophysicist who provided the input for (a) above. ANSWER: 1269 157 

                                        ~73-

INTERROGATORY NO. 96: The lack of geographic features on the aeromagnetic maps of Appendix A that are considered proprietary makes it extremely difficult to evaluate the aeromagnetic data. In addition, the maps that have been reduced f rom 1:24,000 to 1:62,500 are virtually illegible. Furthermore, the data-reduction techniques used by LKB (see page A-9) that any potential similar-ity in the aeromagnetic patterns in the areas of the two surveys is obs cured. Thus, in the interest of presenting the aeromagnetic patterns in the areas, the following are requested: a) that clear, transparent copies of all aeromagnetic maps be printed so that they can be used as overlays on geo-logical and other maps b) aeromagnetic overlays be prepared on two scales: 1.- 1:24,000 for the areas of Figure 2, 3, 4, and 8 in order to comply with Interrogatory No. 8, and

2. 1-62,500 in order to recognize regional aeromagnetic features, c) that all aeromagnetic maps be drafted with a contour interval of 10 gammas, with darker isopleths at 50 gamma inte rva ls ,

d) that the 10 gammas isopleths from the Aero Services survey (Figure 8) be plotted without shading so that the resul-tant patterns are more nearly similar to those of the LKB survey. e) that all figures be draf ted with suf ficiently large letter-ing that reductions to 1:62,500 are clearly legible f) that a single transparent overlay be draf ted at a scale of 1: B2,500 to the above standards for the areas currently covered by Figures 2, 3, 4, and 8 ( this map would replace Figures 2, 3, 4, 8 and 15), g) that all aeromagnetic maps show the flight lines and that these lines be given their appropriate number so that the same flight line on two or more figures can be readily identified, h) that all aeromagnetic maps, including Figures 1-4, 1-12, and 3.1-18, have identifiable fiducial marks (crosses) at each intersection of 7.5' of longitude and latitude. ANSWER: 1269 158 INTERROGATORY NO. 97: In the interest of clarity a single map at a scale of 1:62, 500 is requested that incorporates all of the features of Interrogatory No. 96 (except possibly 96(g) and combines the following: a) the magnetic trends of Figure 14 b) the magnetic contact positions of Figure 16 c) the lines of the profiles shown on Figures 19, 21A, and any other lines of profiles on other maps, d) the anomalies plotted on Figure 24 e) the position of the hypothetical "B and B" fault of Figure 25. Unless the plotting of features mentioned in (a) to (e) be-comes too confusing on a single map, this single map could replace Figures 14, 16', 24, and 25 of Appendix A. ANSWER: INTERROGATORY NO. 98: In the interests of clarity, the ano-malies and areas that are plotted on Figure 24 are requested to be shown on Figures 1-12, 3.1-18, and 3.3-3 (wherever these figures overlap with Figure 24) . ANSWER: 1269 i59 INTERROG ATORY NO. 99: Page 15 of Appendix A states that Bechtel geol'ogists chose the outcrops for Dr. Beck to sample. Please provide the following: (a) the names of geologists who selected the outcrops, and (b) the exerptise these geologists have in designing and evaluating aeromagnetic surveys. ANSWER: INTERROGATORY NO. 100: Please explain why magnetic sus- 

     .ceptibilities of greater than 4000 x 10-6 were routeinely used to test or describe anomalies in Figures 20A, 20F, 20G, 22B, 22C, 23C, 24, etc.; whereas, with the single exception of sample BCH-087, the susceptibilities of all rocks in Appendix 1 of Appendix are less than 4000 x 10-6, ANSWER:

1269 160 INTERROGATORY NO. 101: Page A-7 s tates that flight line profiles were presented at a scale of 1:24,000. Please have these profiles available for inspection at the of ficos of Perkins, Cole, S tone, Olsen & Williams , attorneys for the Applicants. AN SWE R: INTERROGATORY NO. 102: Please explain whether any aeromagnetic lineaments or anomalies within the areas of Figures 8 and 15 of Appendix A are known to be caused by the following: a) cultural features, including pipelines and transmi.ssion lines, and b) survey specifications such as those mentioned on page A-24. ANSWER: 1269 161 INTERROGATORY NO. 103: With regard to the aeromagnetic anomaly on Little Haystack Moutain that is described on page 35 and successive pages, please explain the following: a) why Figure 6 with E-W flight lines and variable ground clearance instead of Figures 3 or 5 was chosen to represent this northwesterly trending anomaly, b) the differences that could be expected in the profiles of Figure 20A to 20G if the observed magnetic profile were taken from Figures 3, 5, or 19 which show different shapes of the anomaly than Figure 6 does, c) why a different location and azimuth were chosen for.the magnetic cross section through Little Haystack Mountain than for the geological cross section through the same mountain shown in Figure 3.1-15, d) why the width of the serpentine body is not shown on Figure 19, e) why lower susceptibilities than those modeled in Figures 20E and 20G might not show a better fit between the height and width of the calculated fields than the susceptibilities that were assumed, and f) what data preclude the possiblity that the Little Haystack anomaly is caused by a serpentinite body that dips approxima tely 4 5* SW, has a susceptibility similar to one of the four values listed for site 1 in Appendix A, and which is confined to the northeastern part of the cutcrop belt (with smaller discrete bodies making up the southwestern portion of the belt, as might be inferred from the surface geology shown on Profile A-A of Figura 3.1-15) . AN SWER: 1269 162 INTERROGATORY NO.104: The 'first paragraph of page A-25 discused the evaluation of magnetic linears and concludes with the following s tateme nt: However, EDCON would not assign a f ault-related origin to these (northwest trending magnetic) lineaments without other evidence in addition to the magnetic expression above. Please explain, in light of this exemplary statement, whether strongly negative conclusions A, B, and E of pages A-54 and A-55 should be modified. ANSWER: INTERROGATORY NO.105 : Although no LKB data sheets have been submitted that include the area of the Devil's Mountain f ault, Page 25 notes that the magnetic lineament as continuous, straight, and undisturbed as the Devil's Mountain f ault shown on the Aero Service survey (Figure 8) do not occur on the LKB data sheets. ANSWER: INTERROG ATORY NO. 106: Section iii of Page A-31 appears to use the terms " areas" and " provinces" interchangeably. Is this the intent, or -does " province" have a dif ferent connotation than 

     " Area"?

AN SWER: INTERROGATORY NO. 107: Section 111 of Page A-31 alleges that the two different magnetic provinces or areas on Figures 14, 15, and 16 correspond to the Church Mountain /Decatur Plate and to the Shuksan Plate. Please explain how this correlation can be seen without the contact between the two plates being shown on igures 14, 15, 16 or on a transparent overlay. ANSWER: 1269 164 INTERROGATORY NO. 108: In order to determine the location of the anomalies shown on Figure 17 please provide the following: a) the fiducial marks on the ends of each profile and at the ends of the segments of each profile shown on Figure 17, b) the position of the flight lines on Figures 5, 6, and 7 as is done on Figu res 2, 3, and 4, and ANSWER: INTERROG ATORY NO. 109: Please explain the cause of the following anomalies on Figure 17: i) the 20 to 30 gamma anomaly approximately 1/2 mile east of Gilligan Creek on flight line 124, and b) all other anomalies with a contrast of more than 50 gammas above background (the traces of many of which are discontinuous on Figure 17 between Day and Gilligan Creeks). ANSWER: 1269 165 INTERROGATORY NO. 110: Page 32 states that "No evidence can be seen of any through-going magnetic response that is associated with the location.or direction of either Giligan or Day Creek." Please define "through-going," taking into consideration that if f aults do exist along Gilligan and Day Creeks, Darrington phyllite is f aulted against Darrington phyllite along the southern side of the Skagit Valley. . ANSWER: 1269 166

INTERROG ATORY NO. 111: One method of determining whether the lineaments along Day Creek and Gilligan Creek are faults or not would be to compare the magnetic patterns on each side of the lineation to see if similar magnetic patterns have been offset. This is not done in Volume #2, therefore, explain the evidence for the dissimilarity (or similarity) of the following: (a) The magnetic patterns of the alleged Church Mountain / Decatur Plate southeast of the Gilligan Creek lineament with that on the northeastern side, and (b) the same for the Day Creek lineament. ANSWER: 9 1269 167 INTERROGATORY NO.112: Figu res 3, 5, and 6 of Appendix A show essentially the same area. Please ' explain the following: a) which of these three maps best displays the magnetic anomalies of the area, and b) what characteristics of the chosen map make it superior to the other two. ANSWER: I INTERROGATORY NO. 113: Page 34 of Appendix A states that there is no evidence for a fault between Butler Hill and anomaly A. Please explain what party or authority sugguested that a f ault existed in this location. AN SWE R: 1269 168 INTERROGATORY NO. 114: Page 34 states that no evidence of an easterly trending fault exists south of anomaly A. Please explain the aeromagnetic evidence that precludes the possibility of a fault striking approximately N 70* E passing south of anomaly A. ANSWER: INTERROG ATORY NO .115 : Page 37 states that a three dimensional 

          'el is availabl,e for the Little Haystack Mountain aeromagnetic a.Sma'y.l    Please provide this model and the specific limitations and n     .neters upon which it is based.

ANSWER: 1269 169 c35-

. t. . INTERROGATORY NO. 116: With regard to the modeling of the thrust plane on Cultus Mountain in Figures 21 A and 21B, please exnlain the following: a) why on Figure 21 A the " Inferred Location of the Thrust from Bechtel Geologic Map" appears to be different than the location of the. thrust on Appendix H, b) why the " Inferred Position of Main Thrust from Magnetic Data on Figure 21 is shown only for profile C-C' and not for A-A' and B-B', c) whether the location' of any of the magnetic profiles of Figure 21A are coincident with the geological cross sections depicted in Figure 3.1-13 and 3.1-14, and if not, wny not, d) why the Applicants prefer either the geophysically determined position of the main thrust on profile C-C' of Figure 21 A or the geologically determined determined position shown in Appendix H, e) the basis for stating on page 39 that a comparison of the modeled profiles should be based primarily upon the northeastern parts of the profiles, rather than including the strong positive anomalies on the southwest was omitted f rom Figure 21, f) what could cause the strong positive anomalies on the southwestern portions of, A-A' and B-B', g) why a model of a southwestward dipping thrust shallower than Model A and incorporating the strong positive ~ anomalies on the southwes t was omitted from Figure 21, h) why the model of a gently northeasterly dipping thrust is accepted even though none of the observed profiles in Figure 21B match the calculated pro-files, and i) why some combinations of a shallow southwesterly dipping thrust fault and a higher angle fault in the general vicinity of the "B & B" fault was not modeled. ANSWER: 1269 170 

     ^                                                                  .

INTERROGATORY NO. 117: With regard to Figure 24, please explain - the following: a) whether the " determined dip of the body" (shown in the legend and on the map) is a geological measurement or a geophysical inference, 

            .b)   if (a) above is a geophysical inferrence, pleke explain this determination c)   the lithological equivalents of typical ranges of k values used, d)   whether the dip of the body (as mentioned on page 43) refers to its geological dip or could be caused by differential erosion of the upper portion of the original body (so that present body is a tapering prism)

ANSWER: INTERROGATORY NO.118 : With respect to the Goat Moutain anomaly discussed on pages 43 and 44, please explain the following: a) the basis for EDCON's interpretation, b) the significance that the different shape of the anomaly as measured by Thompson (1973) and by LKB has in the geological interpretation of the shape, orientation, and composition of the causitive body, c) where the profile data and limited modeling (page 43) would place the inferred position of the contact of the ultramatic body, and d) how (c) above coincides with the mapped location of the ultramatic body on Appendix H. ANSWER: 

                                                             ~1269  171 a      .

INTERROGATORY NO. 119: With regard to the modeling of the South Chuckanut Mountain aeromagnetic anomaly discussed on page A-44 to A-48 and shown on Figures 23B to 23D please show the best two alternative calculated models for a two part body consis ting of the following: a) an east-west striking portion similar to that shown in Appendix A, Figure 23B, and b) a steeply dipping portion of similar composition that strikes about l' 30' W, is tangent to the southwestern corner of the portion describsd in (a), and has a K value of less than <4000 x 10-6, ANSWER: INTERROGATORY NO.120: With regard to the discussion of Anomaly 2 on page 51, please explain the following: a) does the Applicant concur with EDCON's interpre-tation that Anomaly 2 may represent the average position of the Shuksan thrust, b) if so, please explain why the position of the thrust is shown farther to the northeast on Appendix H. ANSWER: 1269 172 s

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SEP 181979 > 2 CERTIFICATE OF SERVICE [y ,,

es**., a s-s I hereby certify that copies of: *** ' g INTERVENOR SCANP'S INTERROGATORIES AND REQUESTS DDR o' PRODUCTION TO APPLICANT - 14 dated September -}A,1979 have been served on the following by depositing the same in the United States mail, postage H IM) prepaid, on this L6th day of S eptember, 1979. Valentine B. Deale, Esq., Chairman Docketing and Service Section Atomic Safety and Licensing Board Office of the Secretary U.S. Nuclear Regulatory U.S. Nuclear Regulatory Commission Commission 1001 Connecticut Avenue N.W. Washington, D.C. 20555 Washington, D.C. 20036 Richard L. Black, Esq. Dr. Frank F. Hooper, Member Couns ?l for NRC S taf f Atomic Safety and Licensing Board U.S. Nuclear Regulatory School of Natural Resources Commission University of Michigan Office of the Executive Legal Ann Arbor, MI. 48104 Director Washington, D, C. 20555 Gustave A. Linenberger, Member Atomic Safety and Licensing Board Nicholas D. Lewis, Chairman U.S. Nuclear Regulatory Energy Facility Site Evaluation Commission Council Washington, D.C. 20555 820 East Fif th Avenue Olympia, Washington 98504 Certificate - 1 I269 173

Richard M. Sandvik, Esq., Russel W. Busch Assistant Attorney General Evergreen Legal Services Department of Justice 520 Smith Tower 500 Pacific Building Seattle, Washington 98104 520 S. W. Y amhill Portland, Oregon 97204 Thbmas Moser Deputy Prosecuting Attorney Robe rt Lowens tein, Esq. Skagit County Courthouse Lowenstein, Newman, Reis & M t. Vernon, Washington 98273 Axelrad 1025 Connecticut Avenue, N.W. Warren Hastings Washington, D.C. 20036 Portland General Electric Co. 121 S.W. Salmon Street James W. Durham, Esq. TB 13 Portland General Electric Co. Portland, Oregon 97204 121 S.W. Salmon Street TB 17 Portland, Oregon 97204 CFSP and FOB E. Stachon & L. Marbet 19142 S. Bakers Ferry Road Boring, Oregon 97009 Canadian Consulate General Peter A. van Brakel Vice-Consul 412 Plaza 600 ~ 6th and S tewart S treet Seattle, Washington 98101 F. Theodore Thomsen Perkins , Coie, Stone, Olsen 

         & Williams 1900 Washington Building Seattle, Washington 98101 Alan P. O' Kelly Pain'e, Lowe, Coffin, Herman
          & O' Kelly 1400 Washington Trust Financial Center Spokane, Washington      99204 DATED:    .

[w [ <f- / %[ / ROGER . LEED By l-w a I- AN' Certificate - 2 

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