Text

Forwards Formal Response to 820409 Request for Addl Info Re Geology & Seismology,Questions CS 230.1,2,4 & 5 & CS 231.1, 2 & 3.Response Will Be Incorporated Into PSAR Amend 69
	ML20054F134
Person / Time
Site:	Clinch River
Issue date:	06/08/1982
From:	Longenecker J; ENERGY, DEPT. OF
To:	Check P; Office of Nuclear Reactor Regulation
References
	HQ:S:82:045, HQ:S:82:45, NUDOCS 8206150243
	Download: ML20054F134 (75)
	v • d • e

{{#Wiki_filter:@ Department of Energy Washington, D.C. 20545 Dock ( No. 50-537 HQ:S:82:045 JUN 0 81982 Mr. Paul S. Check, Director CRBR Program Office Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Dear Mr. Check:

RESPONSES TO REQUEST FOR ADDITIONAL INFORMATION - GE0 LOGY AND SEISM 0 LOGY

Reference:

Letter, P.S. Check to J. R. Longenecker, "CRBRP Request for Additional Information," dated April 9,1982 This letter formally responds to your request for additional information contained in the referenced letter. Enclosed are responses to Questions CS 230.1, 2, 4, and 5 and CS 231.1, 2, and 3. These responses will also be incorporated into the PSAR Admendment 69, scheduled for submittal in June. Sincerely, Jofp R. Longene er Acting Director, Office of the Clinch River Breeder Reactor Plant Project Office of Nuclear Energy Enclosures cc: Service List Standard Distribution Licensing Distribution 0) R206150243 820608 PDR ADOCK 05000537 A PDR

Questfon 230.1 1 The last earthquake listed in both Table 2.5-2 and Table 2.5-3 of the PSAR is dated November 30, 1973. Update both of these seismicity lists to include all more recent pertinent events. Include in Table 2.5-3 all earthquakes of maximum Modified Mercalli intensity greater than IV or magnitude greater than 3 which have been reported in all tectonic provinces any parts of which are within 200 miles of the site. Where available, for each earthquake provide epicenter mordinates, depth of focus, origin flee, highest Intensity, magnitude, seismic moment, source mechanism, source dimensions, source rise r stress drop and any time, rupture velocity, total dislocation, fractione strong motion recordings; ref erences f rom which the 5;4cifled Information was AlI magnitude designations such as a ' M

M obtained shout d be Identif led.

etc. should be Identified. The epicenters of all earthquakes listed in Tabl5' b t 2.5-3 should be plotted on a map such as Figure 2.5-8. Provide a larger scale map showing earthqucke epicenters of all known events within 50 miles of the site. Resoonse INTRODUCTION The response to this question is In the form of a computer generated Iisting of pertinent data for earthquakes of maximum Modified Mercalli intensity greater than IV and/or magnitude eater an 3.0 within the geographic area i 29.0 N - 42.0N latitude and 69.0 - 94.0 longitude. This area includes all, tectonic provinces any part of which is within 200 miles of the CRBRP site. We have also prepared a computer generated listing of all reported earthquakes within 50 miles of the CRBRP site. The locations of the earthquakes in these listings have been plotted in a series of four figures. AvalIabt e Information concerning focal mechant sms for pertinent earthquakes has also been included. Other requested information has been provided where data is available. During the I!terature search conducted in response to this question, it came to our attention that an extensive listing of central United States l QCS230.1-1 Amend. 69 May 1982

~ " ~ ~ ~ ~ ~ ~ ~ ~ ~ " ~ '~~^~ PCge - 2 (82-d342] 368'~ ~ ~ " " " earthquakes has recently been mmpiled by Dr. O. W. Nuttil (PSAR Soc. 2.5 Ref. 164) nf St. Louis University. Some dif forence in the number of very early ' tensity (generally less than V >#4) and in the number ofmore events oi :y recent events s small magnitude (generally less than 3.5) detected by St. Louis University a o believed to exist between the listing presented herein and that complied by Dr. Nuttil. However, these dif f erences are not-considered to be major and would not Impact seismic design of the CRBRP. Consequently, they have not been included In this response. Historical Earthauake Listings See rev tsed PSAR Section 2.5.2.5, Tables 2.5-2 and 3, and Figure 2.5-18 for the requested Inf ormation. FOCAL EOiANISMS FOR PERTINENT EVENTS November 30. 1973. Marvville. Tennessee The magnitude 4.6 ms November 30, 1973 earthquake near Maryville, Tennessee is one of the few soutNeastern United States earthquakes for which focal mechanism solutions are available. Bol l inger et al., ( 1976) (PSAR Sec. 2.5 Ref.166) obtained two solutions, one showing normal f aulting on northeast or northwest striking nodal planes, the other def ining reverse f aulting with nodal planes striking northwest. Bollinger et al., (1976) f avored the reverse f aulting solution on a aorthwest striking f ault plane based on additional data (af tershock epicenters, vertical distribution of af tershock hypocenters and regional In-situ stress measurements). Herrmann (1979) (PSAR Sec. 2.5 Ref. 167) obtained a strike-slip mechanism with nodal planes striking either north-northeast or west-northwest, with steep dips. July 27. 1980. Sharosburg. Kentucky Mauk et al (1982) (PSAR Sec. 2.5 Ref.168) reported tha f of IowIng f avored b Jugy 27,1980 Shgrpsburg, Kentucky mechanism for the magnitude 5.1 m earthquake: f ault plane strlking N42 E, dipping 50 E wIth a siip vector 184 enst of strike. This Impiles rIght-Iateral strike-siip displacement wIth a small component of thrust. The other (unf avored) nodal plane strikes N135 E and dips 85 to the southwest. QCS230.1-2 Amend. 69 May 1982

Page - 3 [82-0'3'20] #69 Intensity estimates prw!de the basis for the epicentral locations of earthquakes prior to about 1960. Before 1800, much of the region was so sparsely populated that the epicentral locations were Identified with the scattered towns, possibly tens of miles from the actual epicenters. Since then, the greater populatloa density, better communications, and more seismograph stations have made It possible to locate areas of greatest intensity within a few miles. Within the past f ew years strong motion eelsmographs have been Installed at several nuclear power plants being constructed in the general region. Surf ace Intensities at the site have not been directly observed. The Intensities which occurred at the site have been estimated based on the epicentral intensity and distance f rom the (RBRP site (Ref.111). The site area has experienced numerous light to moderate es-thquakes. The maximum site Intensity associated with these earthquakes is VI-VII M. The site investigation has not produced any physical evidence which can be associated with any earthquakes. 2.5.2.4 EngInnerIng Procertles of MaterIais Underiving the SIto The engineering propertles of materials underlying the site are discussed in section 2.5.4.2. 2.5.2.5 Earthauake History Two historical earthquako listings are compiled. One listing, Table 2.5-2 inct des historical earthquakes ogcurring within the region between 29.0 N - 42.0 latliude and 69.0 W - 94.0W longitude. This list contains events with epicentral intensities exceeding IV W and/or assigned magnitudes greater than 3.0. The list also contains information on some significant early historical events for which neither magnitude nor lotensity data are available. A second listing, Table 2.M contains all earthquakes reported to have occurred within a 50 mile radius of the CRBRP site, regardless of intensity or magnitude estimates. l l 2.5-23 Amend. 69 May 1982

Pcge - 4 L82-0320J #69 --~ Figure 2.5-18 includes the data contalled in the two historical earthquake listings, Tables 2.5-2 and 3. -Figure 2.5-18, sheet 1 of 4 shows all earthquakes with maximum Intensities exceeding IV W and/or magnitudgs equ i to or greater pan %.0, reported 3 within the geographic region 30 -41.5 latitude; 73.5 -93 longitude. The open circles indicate all events with Intensities exceeding IV M. The X's represent those events (Magnitude greater than or equal to 3.0) which were either unf elt or had reported Intensities of IV M or less. The X's also include several significant early historical events with unrepccted magnitudes and Intensities. Figure 2.5-18, sheet 2 of 4 also shows all aarthquakes with maximum Intensity exceeding IV M and/or magnitups eq al to or greater than 3.0, reported latitude; 73.5 -93% longitude. The 0 within the geographic regin 30 -41.5 square symbols Indicate all events with magnitudes equal to or greater than 3.0. The X's represent those events (l>lV M) with unreported magnitude or magnitude less than 3.0. The X's also include several significant early historical events with unreported magnitudes and Intensities. 1 2.5-23a hnend. 69 May 1982

P ge - S Ltsz-0320J #69 Figure 2.5-18, sheet 3 of 4 Includes all historical earthquakes within 50 miles of the site. Maximum Modified Mercellt intensity is shown by open circl es. Unf elt events and events with unreported Intensity are shown by the X's. Figure 2.5-18, sheet 4 of 4 also includes all historical earthquakes within 50 miles of the site. Magnitude is shown by the square symbols. Events with unreported magnitude are shown by the X's. l l i 2.5-23b Amend. 69 May 1982 l

Page 2 (82-034tr L8,'22J n 3 '-~~~~~' (162) Gutenberg, B. (and Richter, C. F.) Magnitude and energy of 1956 earthquakes: Annal I di Geof Isica, Vol. 9, No.1, pp. 1-15. (163) Bath, Markus Earthquake energy and magnitude, in Physics and 1%6 Chemistry of the Earth, Vol. 7: Oxf ord and New York, Pergamon Press, pp. 115-165. (164) Nuttli, O. W. Seismic wave attenuation and magnitude relations f or 1973 eestern North America: Journ. Geophys. Res., Vol. 78, No. 5, pp. 876-885. (165) Richter, C. F. (and Freeman, W. H.) Elementary Seismology: 1958 San Francisco, California, p. 768. (166) Bollinger, G. A. (Langer, C. J. and Harding, S. T.) The eastern 1976 Tennessee earthquake sequence of October through December, 1973, Bul l. Sei sm. Soc. Am., Vol. 66, No. 2, pp. 525-547. (167) Herrmann, R. B. Surf ace wave focal mechentsms for eastern North 1979 Anerican earthquakes with tectonic Impf Ications, Journ. Geophys. Res., Vol. 84, pp. 3543-3552. (168) Mauk, F. J. (Christensen, D. and Henry S.) The Sharpsburg, 1982 Kentucky, earthquake July 27, 1980: main shock paraneters and Isoseismal maps, Bull. Seism. Soc. Am., Vol. 72, No. 1, pp. 221-236. 2.5-62c Amend. 69 May 1982 rsv sve

2. 5-Z.

t: T:bla 4- :: L... c. i e j ~---"---- LIRl'3ifrRET TN EHRONODJGIC AL URDER FRun Silt AI H 5/6/82 C R tlR P MG2200 se N. LAI. a 35.89, p. LowG, a e4.33 n en I SILLCILD HY RLGjg)NAL CHIILRIA nNLAL 4EUlON C== CONNEH CUU40.3 (LAl=LONG)... 42.00= 94.00e 42.00= 69,00, 29.00= 69.00, 29.00= 90.00, HISIHWIC AL S la 38 EE /Vo72'T M ch dF MdM)

COUNDS, INTENSITY HAG.

DEP!1 AREA DISI All= TEAN Md DA HW LAI. LHNG. H.H. R.F. (E{l (HT 5Q) (MI) NdlH RLF. RLNARMS 1731 12 18 2l:00 40.80 F4.00 7 656,3 55,8 i NEAR NLM YORK CITY i 1755-~4 2E 2fi35-3As94 76.50 4f4,9 62.0 1 ANNAPOLIS MD 1774 2 21 14s90 37.50 78.00 58000,0 3T0.6 10,6 1 EASTERN WIRGINIA (aC00RDS) 1776 1 5 05:00 59.50 82.co 6 281,4 26.9 10 NUSalNGUM R. UH10 (*COORDS-Dalt) IFF6 11 6 Onann 35.50 83.20 4=5 71.6 til.8 2 HEST N. CAROLINA (eC00RD$gflME, Dale) 1779 I i v&i15-3F;UO so,00 141.3 Bel 1 fell IN KLNI'CKY I (aDATE C00RDS) U 1191 e 1 01:00 38.00 84.00 14F.3 6,1 1 APRIL 04 MAY 1791 OR 1792 IN RENTUCKY ,g 1141 5 18 22:00 4i.50

12. F0 8

35000.0 741.9 55.2 1 LASI~HADDAM, CONN, ',o 1792 0 28 22:00 41.50 72,50 747.9 55.2 1 (AST H&DDAH, CONN. ' Fi773 q I Il 08:00 41.50

12. 53 147.9

$$ed i IASI H4DDAM CONN I 1744 3 6 14:00 41,50 72.50 747.9 $$.2 1 EAST H4DDAM. CONN, { !- - I l47-T- F~63400 34.00 89.00 317.1 311.7 1 MASKASilAe1LL. AND RY, (*C00RDS) E 1800 t IF 00:n0 39.80 75.20 $68.8 58,9 I PHILADSLPHIA, PA. I c) lRuu 11 27 E6io~0~ 3V.80 75,70 568.8 58.9 1 PHILADtLPHIA PA 1G04 M 24 19110 42.00 87.80 5=6 6 30000.0 460.3 337,5 7 FORT DEANBURN,ILLINOl$ (INT.=REF.7) Isob o 11 19 sue 41.50 12.50 741,9 55.2 1 EAST HADDAN CONN 1807 S 30 04:00 37.50 77,50 5 397.1 71,7 I RICHMOND, VA. (aDATL=MAY31) 16Tl 12 16 02Tio 36.60 89.60 12 7.2 2000000.0 294.8 281,1 1 NfM NADIRDe HU, (* MAG. T.2 MB) 1812 123 09 uo 36 60 89.60 12 7,1 294.8 28tel i NEW MADRID, HU. (* MAG. F.I MB) t 15I2 2 7 63ieS 36.60 d4.60 12 7.4 294.8 281.1 1 HLn MADRID, MO. (* MAG. F.4 MB) 18to 3 1 00:00 35,40 90.00 4=S 322.1 260.6 2 MISSISSIPPI YALLEY (*COURDS, DATE, IIME) 1820 Il 9 16:00 37.30 39.50 4-5 300.1 290.5 1 CAPL GIRARDEAU, MO. 182T 6 6 22: 30 38.30 85.80 6 183,9 335.3 i NEN ALHANY IND, 9 182 T-B 23 dei 30 48.4u 12770 4=5 F35.5 $5.5 i NLn LONDON, CONNa (allML) 1828 1 9 22:00 31.00 78,u0 5 218000,0 362,9 75.9 i PHODAHLY WIRGINIA (*COORDS) f!ME 22=2300 IRI) d 27 36800 37.04 18.00 5 52000.0 367.9 75.9 1 CtNIRAL vlRGINIA (eCOUNDSI 1854 11 20 its40 37,00 86.00 5 !!5,2 310,9 I NCaiMLRN KE NIUCKY (*COORDS) 1831 e 12 00390 48.10 F2.10 5 145.3 53.9 1 HARIFUND, CONN. (al!NE) 1848 6 9 0M:45 19.00 39.50 6 5.7 353.4 3n9,0 9 SOUTHLRN ILLINOIS (eMAG. 5 F MB) 4 1435 H F 17T30 41.50 12.3n 5 IS00.0 724.6 54.4 1 500lH CUNN)CllCUI 1840 11 Il Octon 39.Ho 75.20 S6n.8 58.9 I PHILADEl.PHIA, PA. (ellMt) IKiG TI 14 Uuso0 37sHO-75.20 Sha.o S8.9 1 PHILADLLPHIA, PA, t e!!Nf ) 4 1641 1 2S 00:00 e2.00 15.00 65h 9 47,2 1 NEW YORN IN IHL MORNING (

C ollRD S )

r 18TI 12 21 21:50 3h.e0 M9.20 5 dit.1 278.9 1 teL A N HlCMMAN. MY. (eCOUNDS) i 1803 I C 2480% 35.50 9f,50 8 400000.0 344,3 261,3 9 LASIERN ARMANSAJ (INI, 14=4

REF.2) 4 e

lAIE TI 2K Dis pF-34.00 6e.u0 6 22.7 70.3 i ANusv!LLL, ILNNLSSEk Ins 7 m M 10:o0 42,00 71.90 662.,5 832 SS,5 I SoulH HASSACHUSLTIS 182A 9 977 iso af.00 14.0u 9 $4,i i N.1,,CunN. N.J., AND PLNN.(eCOUNDS) S

LSi! Half

2.5-L Tcblo %(cont.) ~ e \\ ? e HISlHNIC AL S 39= 86 o se COOWDS. [HIENSITY MAG. Ot PL4 AREA U137-All= vf AN MU HA HW LAI. LIPaG. M.M. R.F. (MI) (M1 Sul (MI) HUlH REF. RLMAHMS te i i 1052 4 79 13:00 16.6n Mt.60 6 162000.0 162.6 71.6 11 vluGIN14 N.C.. AND TENN. 3MS5 5 / 09:20 3M.Ou 79.00 5 72000.0 331.0 62.3 1 vlHGINIA=nLSI VINGINIA (eCOURDS) lESS 2 2 01:00 17.no 78 60 5 9000.0 330 4 74.9 1 CHAR',ETTL COURT HOUSE. VA. t a 3A55 5 7 JiTil-It 0p 89.20 4-5 afi.s 287.4 2 CAIRU, IL, (eCOUNDS) 267.8 288.0 2 IL r MY., TN teC00RDSg_JjM[] 1856 11 9 00:00 47 00 69.00 45 i a jnD0 69.20 6 5.4 7500.0 328.3 307.1 9 ILLINUIS (2 SHUCKS) teMAG, 5.4 Me) 3 E57 fi--) c4 :00 1857 1/ 19 n9:04 12.90 nu 00 324.2 12M.3 1 CHARLESTON SUUId CAROLINA l 3353 6 50 22:4S 41.60 15.00 S 1000.0 735.2 S2.5 i NLp HAVLN CONN 0 362.9 75.9 1 PROBA8LY vlRGINIA (aCUORDS) tent 4 31 CSI/2 37 uo 78.00 6 30000_03 t IM65 6 il u9sou 36.00 A9.5u 7 24000.0 266.3 273.0 9.DVtR$8 URGE IN. Init to 9 09:40 19,70 F5.50 7 551.5 5A.8 I alLMINGinNe DELAnANE 1672 6 17 15:00 33.10 83.30 5 202.4 162.0 t HILLEDGLvlLLt GA 387/ 7 Il dss 25 40.90 F3.no 5 100.0 668.8 55.1 1 NESTCHE STER COUNTY N Y l 3E74 2 10 00:u0 SS.70 82.10 5 126.6 95.2 1 MCDumLLL CU., N.C. FEL1 LOCAL (SLRIES) 1H74 2 22 00:00 35.70 R2.10 7 128.6 95.2 2 HCDUwELL CD., N.C. IN P M, t 74 4 11 30 00 35.70 62.10 5 126.6 95.2 3 bCDunLLL, CU., N.C,e (eflM5) R 1674 12 to 2/125 40.90 73.80 6 5000.0 666.8 SS.F 1 NESTCHESilReN.Y. IF15 h 18 07:43 40.20 ed.00 F 40000.0 298.5 3.9 1 UNIO 1875 7 2R Coelo 41.80 73.20 5-2000.0 726.3 52.4 1 CONNECTICUT 3615 11 1 21155 33.8C 82.50 6 25000.0 179.6 143.0 1 NDHTH GEORGIA I 3 3_ 1_875 12 27 23:45 17,60 78 So 7 5000_0,0 346.4 68.3 i ARVONIA VA j ,) 3876 9 2S costs In.So 81.g i0 6 60000.0 256.6 315.6 1 EVANSVILLE, IND. = i 3 3 - 1877 9 to 09859 40,30' 74.90 4-5 300.0 598.5 $6.6 1 DELAWARE RIXER thil !! th 02:18 15.50 64.00 5000.0 34.5 141.3 1 PESILRN NORTH CAROLINA AND EASTERN IEMN h %P 1816 3 il 04:40 36.80 89.20 5 275.4 284.6 1 CULUMuuS, NY. (FELT LUCALLY) F IK70 lu 4 02:30 41.Su F4.00 5 600.0 680.2 52.1 1 HUDSON RlWER NV 1878 Il IP 73:52 36,70 90.40 6 150000.0 339.7 288.3 i SE, MISS_UUR[_11N1,_1{=vjf))R((i_g) iB 74-I T? 23 Fe5-29.50~~ia.00 6 25000.0 462.7 161.9 Nun 1H FLORIDA (2 SHUCKSe 10 MIN. APART) 3H19 5 /S 19:30 39,2n 75.S0 4-5 600.0 537.4 62.2 1 DELAMAHE R!vER 1674 T2 II 02:00 1s.20 80.e0 s 267.0 102.3 i CHIRULillIE, NURlH C ARDLINA 1MA2 2 9 14100 40.40 64.20 5 311.8 1.5 10 UH10 3Hn2 1 20 04:u0 38.00 90.00 $000.0 342.1 296.6 i SOUTHLRN ILLINUIS 1832 9 7F 04:20 $9 00 90.00 6 40000.0 375.6 306.6 i SOUTH ILLIN013 IBAP 1515 Loanu 14Y50 9 u700 5 40000.0 375.6 36s.6 i S. ILLINUIS (2 SHOCKS, 5 HMS. Araat) tHH2 in 22 16: 15 35 00 94.00 6-T 135000 0 S44 6 266.3 l' ARMANSAS .~~ g 80u56 D F3.5 2B7;4 i CITNU, IL. 3BRs 11 olTI2 37'.0079;2u 6 1HMS 2 #1 72330 41.50 71.50 S 794,4 56.9 1 NHUpt ISLAND IMHz 3 11 18157 59.50 76.40 4=5 5b2.4 57.9 1 HAN ff 0ND Cil, MD, (3 SHOCKS M/l 6 NRS.) l IHn3 a 12 02:30 37.00 M9.20 6-F 278.5 287,4 i CAIRU, IL. (FELT LUCALLY) l seR3 i 1 T U l ilii-3 7 ;h s-89 720 4;5 27E;5 lit.4 2~ t11RU, IL, tHMS It S u9:2n 36.30 91.60 5 415.0 276.1 1 IZARD CU,, AR, (PtLT LUCALLY) t hB4-T 14~GHinn-lE.36-7s.co 5 3 7 T~.1 10571 1-31Lhls5fDNI~N.C. IELT LOCALLT ~ tone S st 00 u0 4c.no 15.50 5 SMI.I 53.3 1 ALLENIUwN PA. FELT UNLY LOCALLY (eI]ME) IF T4f51 qu.65 14.vu i 10u00.0 650.0 S6.6 i NEAR NEk TUNM CllY I u inRu n i is tene 9 19 14: 14 go.Fn ne.10 6 125000,0 332.1 2.6 i COLUMouS UHlu n 18E5 I 2~21:16-~30.20" 71;59 5 3566 0 440.n 56.7 i MikifiED AND vlRGINIA s IHMS H 6 Chron 36./o MI.60 4-5 156.9 Al.1 1 >AIUGA Cil e N.C. FE(T LUCALLY (aT[nt)~~~ ~~ e IR AW 16~ 9 23835 1 7. 788~lM.Bu 6 20u00.0 334.? 66.3 1 v lE61YlT'g ~~ ~ 7 ~~~ e t SilM Alt e I e t

r.$ - 7. T.blo -((cont.) n.,. _.. U-s e ot Sloeil Al.3 87-13e e CtpsuoS. INTEhSITV NAC, OEPIH ANEA DISI AZI-se vt FHiT Ifa HH

t. A 7 L Mc,.

H.n, NJ. (HD (nl 50) (n!) HulH HEF. RLNA.4KS o IBMA 2 e 20:00 42,8n* 88.00 5 1600.0 296.9 225.1 1 ALADAMA es l H M e> < 33 00s00 3 2. t4 9 85.00 dv6.9 225.3 l A L A 6 A Pt A (ellME,1NI) 166h d 31 21:58 32.90 80.00 10 6,8 2000000,0 324.2 128.3 1 CH ARL E S T ON, 3,C, (eMAG, 6,6 M8) laarrTU72'I41W 32;95-EUiuo i 55555 5 32G2TJa.3 I CH A NLT510N, S.C. (2~5RUCnS tan 6 11 5 12:20 32.90 Mu.00 6 30000.0 320.2 128,3 2 CHARLESION S,C. IUR7-2 6 TETI5 1Q577.To 6 75055.0 258.9 319.5 I VIEENNES INo 18R7 M 2 12s36 37.00

9.20 5

278.5 287,4 i CAIRO, IL, (NIDESPREAD EFFECTS) IMA9 3 6 16seu ep.ou 14.0u 5 4000,C 537,5 55.6 1 PLNNSYLVANIA 1889 7 to 19: 52 35.20 90.00 6 319.e 263.1 1 NEMPHIS, TN, (INT V-VII, REF. 2) 3A91 i 2K 25i'2a U 3iF 57.59 6 221.3 369,e ! E 65VILLE e IN. In91 9 26 2/ 55 37.00 89.20 5 278.5 287.4 2 CAIRUe IL,_(*CUORDS) tBUT~ T O 50ilo so.60 7e.09 5 650.0 56.5 I NEAR NLu YURn Clif FELI LOCALLY t il95 9 1 06109 0p.70 74,80 6 35000,0 636,5 54.5 i NEa JERSET FtLT fu LAST AND NDHTHEAS7 1895 In ti u5:06 31.00 69.40 9 6.2 1000000.0 289,2 286.9 9 MISSuuM1 (aMAG. 6.2 MB) 1897 <a 3n 22:00 36.00 89.00 4-5 258,4 273.0 1 T[NNESSEL AND ILLINUIS (4C004D3) lHI 5 3 12 il t; 1730 85 TV 6 29000.0 221.0 66.7 i PULASK!, VA. (INI, 7-NLF, 2) M97 5 31 11:56 17.30 80 70 A 265000,0 226,3 65,4 6 GILES CU., VIRGINIA id47~I D I~22i7o 37.09 eT.*ou 5 23000.0 203.0 66.a a ovrntvlLLE VA IA9 7 12 In 1M:45 17.70 71.50 'i 7500.0 sco,T 69,8 1 ASHLAND, VA. 1896 / 5 15:00 37.00 60.70 6 34000,0 216.6 65.e i PULASKI,VA. I

= d IR9811 #5 15:00 36 90 M1.to 5

65000,0 195.4 68.1 1 NfiHEVILLE, VA. (eCUORDS) { 1 c 1894 / 13~04:3V-3 7.TC51.co 5 !!5000,0 203.0 66,8 I VINGINIA 0 3 ' 1899 4 29 2d:05 36.50 A7.00 6-7 40000,0 230.8 322 1 SUUINNES7 INDIANA AND SOUTHEAST ILLINil!S 3 409,8 j W,2 1 19Ub 10 3FITTiF3 pM I. 70 5 0 l JACKSONVILLE FLA. FLLI LUCALLY 7 vol ni !J oleno 39.30 82.50 5 7000.0 257,2 23,t 1 UH10 190< s de 04:46 38.60 9u.30 6 40000,0 375.4 301.7 1 elS$UuRI 1902 5 29 02130 35.10 65.30 5 75.1 223 1 1 CHATTAN00GA TENN #ELT LI) CAL (Y ~ t 19H< 10 IH~i7f W ~3 Q 4 7 5730 5 1500.0 80.3 220.3 1 SUOTHEAS[ IENN Ah0 NUT HNLSI GA 1993 1 23 20: 15 32,10 81.10 6 10000,0 322.3 143,4 1 CEURGIA AND SOUTH CARULINA 1W3-TE~l B f717 A;50 90.30 6 10b50.0-- 372.2 300.7 i SI LOUIS NU 1943 Il e 12:18 16.50 90.30 6-7 70000,0 372.2 300.7 i ST. LOUIS, H0, (2 SHUCR8 56 MIN. APART) 19p3 31 (I 05:20 36.54 69.50 5 70000.0 2Fa.4 279.9 I NLM MADNIO, MU, g904 5 e 19: 30 35.70 MS.50 5 5000,0 St.2 loe.6 I EAST it NN 19J5 4 Il~l'Uf 3u eQb 91749 5 5 5M. 0 442.2 311.4 1 nEunun IUmA 1995 8 ?! 23:0n 36.00 90.00 6 40000,0 318,3 273.0 1 MISSIS $1PPI VALLEY (*CUORDS) 1456 5 8 T2tEl SQ M S.'70 5 400.0 515.0 65.3 1 DI.LA>ANE 1906 5 ll 00: 15 38.50 67.20 5 800,0 237,8 320,2 1 PETENSHUNG, IN0e 19 4 e. 5 di 13:04 34,no H6.50 5 30d,6 312.9 i FLONA, ILL. 1906 6 21 losin et.s0 el.6c 5 400.0 409,2 20,7 1 FAlHPUNI, OHIU 190T 2 il Oiis72-'37 Te JA,eu 6 5h00.0 3$T.8 67.5 1 ANTONIA VA. 1901 e 19 03:30 32.90 NO.00 5 10000,0 324,2 128.3 I CHANLtSTUN 3.C. 1907 7 e C 5:00 .51.70 90.e0 4-5 '400.0 355.6 292.4 1 # ANNINt. ION, MU, 1946 / 5 033/o 42,00 7.$. q u 742.2 51.9 i HOUSAIONIC VALLEY CONN (eCOUNDS) Ja t906 5 al 12:42 ce.60 75.5n 6 561,1 53,3 l ALLLNIUWN, PA. fLLI LUCALLY Ja 19nH t1 #3 00: 30 31.50 71.90 5 1*iOO,0 375.9 70.9 i PUwHATAN, VA. Jo 19pb 9 /H TTiTe 36.So 89.5u 4-5 5000.0 eno.4 279.9 1 Nta NaoN:o, Nu, 19ne in is intar 31.99 89.<0 5 5000,0 ein,5 2el,e l CAINU. IL. ~ e 14W~E 7 0/i457;eii~~TF.Do 5-6 ds50.0 425.0 53,3 I wA > VA NO AND PA I 7 e e LSilpalt .e (

r3-L l Tablo 4b,(cont.) .n... .,. ) HislukIC At s 13s. In? e roombs. INTENS!!Y MAC. O{PlH AHt A DjSi AJ). se yl AN Pie bA HH LAI. LUuG. M.M. N.F. In!) Int su) (MI) MUTH N t. f. hEMARh3 88 1999 7 lb 22 Se eu.?u 90.00 7 40000.0 426.6 316.u I ILLINOIS sa - 1909 e 16 16:45 3e.30 90.20 ans.2 e99.e i SUulHHLSI ILLINU13 86 So S 4000.0 2(6,e_}29.7 1,_thdIU VAllty (a[jgt) ) 1909 9 22_00:00 In.Fo, 87,60 T 3000u 0 270.0 321,6 1 INDIANIA (2 SHUCKS, S MIN, APANI) l a 1909 9 47 03:45 39,on 1909 lu 4 05:0u 15,00 eS,00 4=$ 800,0 70.6_209.7 11 NUNTHEASI GLUNQlA j i 1909 to 23 01:10 37.00 89.$0 5 40000,0 244,6 206.6 1 HISSOUNI (INT, VeVI, NEF, 2) 1909 lu /1 01:47__39,00 87.70 S Sn00.0 281.6 320.7 i NUNINSUN. ILLINU13 1980 S h 10: 10 31,79 76,4h 5 4000.0 353,8 67.5 1 ARvuNIA VA 35 92,20 5 18000.0 466.1 254.2 I NISUNg AN. (2 SHUCMSg_{}_M,jN, APART) 1918 1 31 10:57 J5,60 62.70 S 600,0 105,9 libel 1 N,C,*S.C. HURDER (ellML) 20 1 11 4 26-'00s60 9 3912 1 2 10:28 41,50 86.50 6 40000.0 446.6 331.5. 1 ILLINU]S i 1912 6 12 05s36 31,00 8u.20 7 3S000,0 380,9 128,8 i SuMMLHVILLL 3 C 1912 6 d t. 00:00 32.00 88.00 5 331.4 -143 2 1 SAVANNAH, GA. (eitMt) 1 1913 I i 15:2h 34.70 88.70 7 43000.0 172.2 117,7 6 UNIUM COUNTY, S.C. 1913 3 /u 16:50 36 20 83.70 7 2700,0 43.7 60 S I E A S-T E N N ItNNESSLL g 3 1913 4 17 21Tlo 35.30 84720 5 350 F. 0 42.0 165,o 1 E. ILNN.(al!NE ll30)(INT. S=6 = NLF,2) 15i65-31,50 84'50 2131 198 2 1 EAST TENNESSEE FELT UNLY LUCALLT 1914 3 23 22:24 35 60 $0 5 3 83 6 50000.0 174.6 162.9 1 S.L. Ut AILANIAI GLUNGIA i7T4 3 5 1914 9 22 02:04 33.00 80,20 5 10000.0 310.9 128.8 i SuhMERVILLL, S.C. 1715 4 28 11:40 36.40 69.50 4=$ 200,0 287.7 276.5 i Ntp HADRID, MU. 3 1915 to 26 ut:40 36 70 88 60 5 241.4 284.6 i NAfFIELD, MY, (PELT LOCALLY) i g 19iF ID 29 03 co 35,,60 82.70 5 1200,0 94.4 93.3 1 hukIN CANULINA (e[lME) E i ~ {'915 Il - 7 12:40 3b,10 h9.10 5=6 60000.0 266.6 283.4 I NIAR MOUTH OF UH[U RIVER 3 l 91 6 2 21 ilil9 35.S0 82.50 6 200000.0 109,0 103.5 1 NURIN CANULINA (!NI. Fe NEF.) h 916 3 2 00:02 54.S0 _ 82.70 45 13S.I 134.8 11 A rad E R SON. S.Cg_j6 SHUCMS) ? 16 6 o 16: 35 41.00 73.60 4=5 674.1 55,1 1 NEAN HEN TUNK Clif F ELI IINLY LUCAL LY __j9to a 26 14:lb 16 00 81 00 5 3800.0 [89.4 86g1 I htSitRN NUNTH CAROLINA 1916 13 18 16iU4 31,,50 86I20 1 100000.0 194.8 232,5 l INUNDALL, AL, 276 4_281 6 1 ' HICMM ANg_El. (F ELI LUC ALLT) 42 36 69.30 6T 1916 12 18,21:52_,38,,6u 9'0.60 6 200000.0 375,s 295.s St. GENEVlfVE, MD, 3 3 19fi 4 9 14: fo 1987 6 29 20:23 32.70 81.50 5 283.3 219.8 i A L.18 A M A (FELT LDLALLI) lVio 1 16 10:45 36.u0 84.00 5 22.7 10.3 2 KNUavlLit, ILNN. (sLUURDS) 1916 4 9 21:09 18 1o 7a,40 6 60000.0 381,8 57 7 1 VINGINIA 3 9Id-5 21 25iV6-16,10 84.T0 5 3u00.0 2 i. 4 47,3 I LLkuiN Cliv, itnN. 1 i916 ID'[3 01:1U-lG.tld-91~,50 4S3 9 26l1 1916 to 4 05:28 34 70 92 5 9 I ARNANSAS 3}5f7274,2 l AHAA5SAS , IO 5 1916 to IS 23330 35 20 89,20 S 20000.0 275.0 261.4 I HEST itNNESSEL 2 1719 5 25 05i45~~36,50 87.50 5 16000,0 246,9 337,4 1 SUulH INDIANA 394.S $F I VINGINIA 364.1 2f5,5 9 S 21:46 3d,80 78 20 6 1919 919 I f-3-"lisiso-~16,24-96$46 3 3 ARNANSAS (FELI LUCALLT) 45 1 90 5 10000.0 381,9 300,0 t "iSSUURI 1920 S I u9stS Jn 1920 12 24~d2815' 36.,$0~ 85.,SO 15,4 282.6 3-tasi ItNNLSSEE FtLI LUCALLY 60 00 1921 1 26 16:40 40,00 FS 00 5 150.0 584.4 58.8 I AEN JENStV 3 142I-J~15 00:00 36,60 82.30 6 126.0 66.5 1 VINGINIA, FELI LOCALLY (ei!ML) 18 5 2800 0 356.1 66a5 1 VIN 9)NIA 1921 o 7 Ole 30 37 1 21 12 15 On i 26-~15,80- s,40 5005.0 11.7 243,0 2-TASIENN ILNN. (eLUUNDS) a a.s6 5 4 ,80 17,50 _es,oo S 25000.0 2S3.4_293g9 l SUUIH{NN_JLLjNO{S ( y OUND S g_2_S bOGg S ) __,__ _ 19221922-3 22 36sse 37,00 66,00 S 28$,2 291,9 1 mLSILNH MtNTUCny (eLOUgDS) 3 ~ 1Ss45 23 i a LSilnAft =- o

74-2. Tr.ble 1 g(cont.) O G.. a e ? NISTORICaLS 1A3 23d 9 COOuOS. 1841 t NS I T Y MAG. DLPI:1 AREA DIST All= VEAN ful DA Hk LAl. L O'4G. M.M. R.F. (nT) (Mt Sul an!) aulH MtP. RinAHn1 in ~ 1922 3 29 20:2n 35.0 0 ' A6.P0 5 109.9 236.4 2 CENTRAL 'ENNE SSE E (eC00RDSI is 1924 3 3d Ibs53 35.20 90.60 5 352.7 264.0 2 MISSIS 31FPI VALLLT 1922 11 26 21:31 17.00 90.50 5 345.5 28a,5 2 MI S$Qg VALLEY ( a CllO403) 8 921 IT2FTITIG 3'f.5 M F.lo 7 e0000.0 333.1 267.1 1 MlWt D Ih El e ANKANSAS 1923 Il 9 22:00 39 00 86.00 5 292,5 318.e 1 TALLULA lit (*CDURDS) 3 1723 IDeU7I2M5.D7u.40 6 J39.5 266.0 9 NIS8lSSIPPI WALLLT (*COUNDS) 1925 12 31 20 u6 14.80 n2.50 e-5 130.1 128,8 11 GREENVILLE SC 192) It 31 21 05 35.40 90.30 5 30000.0 333.9 265.9 1 ANKANSAS 1924' 3 2 05:16 in.90 69.10 5 15000.0 271,5 286.3 1 MLNIUCKY 1924~F20T 87 H 557 0 07.00 5 56T50.0 lli,7 121.0 i PIGG570uNTf a C 1924 12 25 23810 11.30 79.90 5 267.0 67,3 i HUANUKEe VA. 192577D2 io n 3 Go74. 00 5 250.3 a.i 10 a.m. un[o 19 5 0 24 02:56 41.60 70.60 5 1600.0 835.9 56.7 i SOUTHEAST NASSACHUSETf3 37 2) e 4h (2805 3H 00 51.50 5 100000,0 225.6 311.d I It4 DIANA 1925 5 13 06:00 36.10 88.60 5 3000.0 241.4 284.6 1 KENIUCKY s96 9 2 e5iS5 37.B0 ni.60 5-6 75555 D 21.5'35h 5 I HEN 0ERSONe Mr. 1925 Il le 0M:04 41.50 F2.50 6 850.0 747.9 55.2 i HARIFORD CONN 3926 5 11 2?Ild 40.90 T3.90 5 15G0 664.2 55.m i NEF OUCHELLE NT 1926 7 m nas50 35.90 82.10 6 127,8 89,0 I S. MITCHELL CU., N.C. (INT. 7 = REF. 2) 1920 11 5 b4853 59.10 nd.10 6-F 350.0 254,6 28.7 i SOUTHLASTENN UNIU I 130000.0 260,9 280.7 I HISSISSIPPI VALLEY 5 1927 5 1 02128 16.50 89.00 7 e,a 1927 6 1 07f20 7 5 3 F 74.00 7 3000.0 641.0 58.5 i NEw JLHSty C e 3 'g8 1927 6 to 02:16 JM 00' 79.0G S 2500,0 331.0 62.3 1 VIRGINIA

1927 h 16 07f60 3T 10 ch.00 5

2500.0 !?2.8 228.4 1 SCOIISBURU, AL, h 7 1927. n 13 t o On 36.00 89.50 5 287.7 278.5 2 HISSISSIPPI VALLtf (eC00RDS) P 1921 to Fussio

E.T3 a.5.Uh 5

FU.6 209.7 2 LHAllANUOGAeILMNi9COUND.s) r8 1928 9 9 15:00 41.50 82.00 5 1500,0 408.3 17.6 i LORalH AND CLEVELAND UNIO 3926 Il 4 23 iE 5 3b.00 82.hu 6 40000.0 100.0 85.1 1 MADISON Co., N.C. (INI, 7 = REF.2) 1929 3 3 00:06 40.a0 8a.20 5 5000.0 318.8 1.8 1 DELLtFONTAINE, UNIll IV297T 71 2 FiSF' 38~.~1MC50 6 358.T 63.1 1 C EIRAL VIR5 INIA 4e il e MO. (eC00RDS) TN 1950 6 29 n0:21 37.00 89.00 5 267.8 288.0 2 KTie 195u n 30 09s/s 3 % 99 es.qu 5 1.2 305.9 2 NEA M Nu RI e ENN. 193n 9 30 14840 40.10 84.30 7 304.8 0.8 1 OHIO 19107 MG M CQlM4.00 5 22.7 10.3 3 EASI ItNNESSLL 1910 to 19 Chil; 10.00 91.00 $=6 18000,0 559 1 225.2 6 DONALDSUNVILLE, l.A. 1931 1 5 40i51 59.u0 a7.00 5 500.0 2 4 27,9 3 tLLISION thD 1951 5 5 01:16 33.70 86.60 5 6500.0 196,8 220.4 3 CULLMAN, AL. (INT. V=V!, RtF. l) lVT1 9 20 11:05 eu.40 64.40 1 40000.0 311.6 1.5 3 ANNA OHjU 1931 12 16 11:16 lu,10 M9.60 6 65000,0 330.6 249.6 3 BAIESVILLEe MS. (INT. VI= Vile NtF. 1) IV33 1 24~2Fi40 4c.25 14.15 5 6D0.0 644.7 57.6 3 NEl~R7 TIE N ION e N.J. 1933 5 28 10810 15.70 n3.70 5 600.0 19F,8 10.7 1 HAYSWILLE KV 19 5 FIF9 0714075.a0 9072n 5 100.0 325.9 269.4 3 HANILA. AN. (INI. Via REF. 1) 1943 12 19 n9: 12 13.00 80,20 4-5 310.9 128.8 i SUMMENvlLLE, S.C. LOCAL (INT. 4=MEF.3) na 19111 8 19 landi 57,00 M9.40 6 26000.0 278.5 267.4 3 HUDNLt. MU. (INI. Vlle fll f. 1) is 1934 to 29 15:nF 42.00 no.20 5 478.1 26(1 3 ERIE PA FELT tlNLY LOCALLY e, IV3G L 12NR 5 41 50 90.50 5 508.7 328.5 3 NOCR ISLANue ILL. (I ta l. 6*RE F, 1) e 1945 1 1 bill 5 35.l0 83.60 5 1000,0 Fu.l 180.9 3 AURIH CANOLINA Gt0RGIA 80RDEN e 14.1571 i 03: 10 114. 9 0 79.4u 5-3 M,1 48.5 3 tLn!NS, atSt VIRGINIA '7 a LSilMAlt .e O m

2.S.2. T blo %(cont.) YJ-7 H1310kiCALS 23l= 270 Cu0RDS INitN3!!T MAG. OLPTM AktA U131 Alle yEAN MO DA~ ~EN o m f,'-~L U m, G, M, M, N,P, (MI) (HI 34) (HI) PUIN RtF, htMAHM3 se 6 e 1931 3 2 00:45 4u.40 84.20 67 70000,0 3tl.M l.B 3 ANNA, itH 10 flNT. 7.Rt f. 11 1957 3 3 03:$0 40 e.0 e4,20 S r (318,8 les 10 ANNA, OH30 (AFILM 3HOCR) D 1931 3 n_23:45 40 40 e4 20 7-n IS0000,0 3)). 8 1.6 i ANNA, OMID g 3 191?- S 16 18:50 36,10 90,60 4.S 25000,0 347,8 274,2 1 NORIHLA$ltRN ARRANSAS (INI, !!!, NtF Al 1911 11 17 18805 38 60 89 80 5 8000,0 319.9 301g2 3 CtNINALIA 1(L g 3 1938 7 IS 17845 40,40 76,20 S 100,0 45d,0 45,3 3 300!NLNH BL AIN Cis,e PA, (INI, O'NLF, II 1953 0 22 22:34 40.40 74.50 5 5000.0 611.2 50.0 3 CENTHAL N.J. IVIe 9 17 23:54 55,50 99,30 4-$ 90000,0 333,8 e67,1 1 NUNIHtA31tNN ANKAN343 (INI, IV, HEt, 3) 1919 5 4 21845 Il TO BS,80 S 171.4 208.4 3 ANN {3 ION ALA t 1739 6 19 15'ii3 14,10 93,10 S 505,$ 2$8,5 3 ARMADELPHIA, AR, (PELI LUCALLT) 1939 il 14 21:54 19 e3 75a20 6000.0 563.0 60.2 3 3ALEM COuNIY N J 3 1957 IT 2T 54TT5 38,20 90,10 S 150000,0 353,5 298,6 3 Gulcus ILL 1940 1 28 15tl2 41.60 10.H0 5 2000.0 830.2 57.5 I Bull 4RDS BAY, MASS. (INT. 4.REF. Il 194u 5 St 13:02 11.00 08,uo 4-S 1000,0 215.2 291.9 2 OHill RivtR (eC00HDS) 1940 11 25 15:15 38,20 90',80 to 6 353.3 298.6 3 h A f t @ LOO.. lLL__P EL T OVER A alDL_4Hta 14i5 T2 25 01:50 36,00 67 S 7000,0 88,8 84,6 2 EASI ItNN, AND nt3ILHN N.C. (*COURDS) seet il 16 21:09 55 SO ev 70 5-6 299,6_266.4 3 CovtNGTOy_13,_IttLJ_LOCALLI) u [442 f CDT50 41,,60 of,10 5 455,3 322,4 7 NtNHV COUNTY, ILLINUIS teilMt) 1945 5 o 21:26 41.60 81,30 4-S 40000.0 428.0 21,9 i LAKE ERIE (INT. 4=RtF. 31 1945 a 33 22i25 35,00 84,50 5 68,9 186,2 3 CLLvtLAND, IENN, E 1945 7 20 05:32 34,46-45i20 50 81 40 45 2S000.0 201,2_J22.2 i LAME MuRRAY, S.S. (INT. 4. R Lt4j l i = 1947-6 29 22i24 38, 6 IS000,0 364,2 300.2 i NLAN ST, LOUIS, MO, 3 1951 8 9 20:47 42,00 85 00 6 50000.0 423,5 355.7 3 40uTH CENINAL MICHIGAN 3 p 1947-4 25 15:30 3T,90- 47[10 4-5 S50,i 242,3 32 MINNFIELD, LA, E us 1947 12 15 21:27 35.S0 90,00 30000.0 316.3 266.s 2 htAN 03CtOLA, AN. (eCDORDS) b I ia 2 9 19:04 lb,00 84,50 5-6 10,0 319,2 2 HLAN LAFOLLETTEeIENN (*C00RDS) V F ", 1949 1 li 21:4S 36 40 89 S 7000.0 287,7 2Fb,S 2 NISSISSIPPI VA((LY (eCODND3) 3459-9 IT 62i30- 36,66-81,'50 20 4-5 98.0 46,0 2 PENNINGTON GAP VA, (eCOUNDS) W 1950 2 8 04: 57 37 92 40 5 4Sh e 28S,6 3_ LEBANON _M0 1951 3 29 i 2o~ i f,4 0,26-74,.To a t 3 5 S$00,0 665,2 53.4 3 HuCMLAND CUuNIV N f 1952 2 20 16: 15 36 40 89,SO S 287.7 278,5 3 TNg=MO. HUNDIN 1952 6 20 03ile i9I70 e2,20 6 10000,0 289,0 23,7 3 Sou1HL A S TENN UH10 [9St 1 11:46 10,20__89,60 6 l 1952 fu,166 10:40 41,70 74,60 S 687.5 St. 3 PouGHAELPSIE NY 292,2 275g7 3 D YE N S HUR G,_JN. 1952 11 19 04:00 32 80 00 S 324,2 128 3 3 CHARLt31oN,_3, C. tellML) 1 s~3-3~2? 61is6-ile,90f 5-7 3'50 5 654,1 $5,2 3 STAntuRD CuNN 9 t 19s3 9 11 12:2e 38,60 to 6 36s.9 302.5 3 Sou1Nat3r rLLINors 90[70 1954 1 1 21:25 36,60 8T 6 62,8 17,6 3 nioDt.t3nuRo nr 1954 i F.02:25 40 50 76 00 6 1 h T- ! ~22 6 6 i6 6 ~ 35,,3 6-83,,4 0 547,9 S37 3 SINNING SPRING PA 3 4 S 40,G iGi,4 3 AINENee IfMN, IN P.N, 1954 2 2'80:53 16 70 90 30 6 334 2 281 4 3 POPLAR BLuPF, mu. 3 4T,,26-7S,40 1 3 1954-2 21 15:00 7 S86,)' se,7 3 p!Lnts-SANNE, PA, PELI UNLY LOCALLY 1954 2 23 22:55 41,20 75,90 6 586.7 45.1 3 h!LME3=b4PHL, PA. a 1954 4 2u 20:07-~35,20 90,00 5 319,e 263.1 3 MtRPHIS, IN, s 1955 1 25 08824 35,00 90 30 6 50000.0 332.4 268.3 3 That_AR MO. C e i955-2 i 0.i45 50,40 a4iTo GULFPUN!,N3, 5 407,2 2l7,8 3 1955 3 29 41801 16 69 50 6 286 3 273 3 EINLEY* IN C 4 #didE-36,00 89,50 6 23000,0 335,a6 29s 0 1 a 1955 4 s ,10 ,7-3 nt3I UF SPARTA ILL 7 e a tSitMAIL GS 4 o

2. f= 1.

Tablo 4E fcont.) 3 ~__ ) JD97 t_ i- .. s e 7 gj s ti 41 Cat 3 279-126 e o C90d03 INIFN3ffy hag. OE P !.I AREA DIST All-

e yLAN Ho o A Hw tal.

LUNG. H.M. H.F. (MI) (N! 30) (MI) ru1H HLF. NLMARMS H 1955 S 26 12:09 41.59 61,70 5 413.7 19.6 3 CLEvtLAND OHl0 FELT ONLY LOCALLY '8 1955 6 Ph 19sth el.$o nl.10 5 413.7 19.6 3 CLLvtLAND UH10 FELI UNLY LUCALLT 1955 9 5 19:45 3h.00 69.50 5 286,3 273.0 3 FINLif, TN, 1955-9 24 E2i32-Th.69 81.I0 S 1700.0 173.6 73.2 11 VA-NC HUNDER (eC00RDS) 1955 12 11 01:41 36 00 99.50 5 286 3 273.0 3 DYER C0st IN. (ef!HL) 1 3 1955-17Ni OMO.40 64.25 S 3ft 8 leo 10 MLS M NTRAL UH10 1950 i FA 22:14 IS.63 89.00 6 11500.0 291.3 267.6 3 TN =AR. BURDER g 1956 9 1 udel6 55.50 84.00 6 8100.0 14,5 141,3 3 FAMitHN ILNN. 195h 9 7 eM 49 15.S0 84.00 S 3e.5 141,3 3 EA3 FERN ILNN (955~IT7N124~~~3 Gl o 89.90 5 28ii!8774.4 3 CIRu1 REY 5ildt, MU. i' 1936 11 25 22:13 37.10 90.60 6 21500.0 355,3 285.4 3 hAYNE Cn, MD. HEST CERI AAL NLu JEN3LY 1951 3 23 14i33-To.co 74T30 6 619.7 53.9 3 1957 3 2h 02:27 37.00 8n.40 5 236.1 290.1 3 PADUCAHe KY. (FELT LUCALLT) 1951 4 /3 bus 24 14.50 86.B0 6 !!500.0 ~166,9 235.6 3 BIRMINGHAN, AL. 1957 $ 11 t 9 JS 35.80 8/.00 6 8100.0 133.6 92.0 3 NESIERN NUNIH CAROLINA 1957 6 23 El sl4-15759 84.50 5 42.7 351,2 2 LASI CENTRAL TLNmL33EL 1957 7 7 04: 43 35.50 82.50 6 109.0 103,8 3 DE3fLRN NORTH CAROLINA 1951 Il de 15806 35.00 83,50 6 4100.0 79.1 140.8 3 NORTH CANULINA*ILNNL33tt 80ADER 1956 1 26 10:50 15,20 90,00 5 319.4 263,1 3 NEMPHIS, IN. (FELT LUCALL7) 1758 1 2T 23I57 31.00 89.00 S 300,0 267.8 288.0 3 IL.*nY =NU. HUNDER I 195M i 4 06:54 34.10 77.60 5 387,9 104,5 3 klLMINGION, N.C. (SENIL3 2/10 3/15) 5

N 195n 4 a I612e J E 26-~39;10 5

400.0 264.4 276.0 3 UdTUH CO., IN, G i iY 1958 e 2b 01: 40 16.40' 89.$0 5 287,1 277.2 3 LAME C0, TN. 3 3

, 195p 5

I IE 47-AI!50 31.10 5 413.7 19,6 3 CLEvtLAND, UNIU FELI LOCALLY h a 195n to 20 01:16 lu.50 82.30 5 131,2 136.6 3 ANDEN3DN, S.C. FELT LOCALLY r 1956 Il i Posd2 53.40 al.90 6 33000,0 260,0 312.V 3 ILL.=lND. HUNDER 4: 1956 11 19 12:15 19.30 91.10 5 547 8 227,1 3 BATUN ROUGL, LA. (FELT LOCALLY) 1959 2 11~U2T3 M 6 2 M V750 5 170.0 286 75.6 3 BUGUIA, IN. 1959 e 23 15:59 17.50 80.$0 6 1800.0 242.1 61.5 3 GILE 8 CO., VA 1959 n 3 U113M-~337U5-~1V750 6 45500.0 34e.4 124,3 3 CGI51 Ut 3 CIHuLINA 1959 6 32 14:06 55.00 87.00 6 2800.0 159.7 248.1 3 AL.=TN. HURDER tv5v zu <b /Isai 39.50 co.su 6 4U00.0 d49.1 til,4 3 NORIHLA3ILNN 3, LANULINA 1959 12 /3 10:25 36.00 89.50 5 400.0 286.3 273,0 3 FINLET, IN, 1950 I /K 1511R-16.00 av.5u 5 456.5 #73.0 3 DYtw CU., IN. [FLLI LOCALLV) e 1960 l il n7:48 11.00 79.00 5 3500.0 365.9 128,S 3' COAST OF $UUTH CANULINA 1960 4 IV LVTTE-35733-84.oo 1300.0 24.3 106.1 3 LAYTtHN TENN, (*COUkDS) 1960 = ?! 04:e5 16.40 69.50 5 287.1 277.2 3 LAME CU., TN (FLLI LUCALLf) g 1960 1 23 t eila 55,00 80.00 5 319.7 127.4 3 LHANLLSION, 3,C,FLL] LULALLY 1961 2 22 03:45 41.2p h3.40 5 370.7 7,V 3 NORTHWt3ftRN UNIU e 3961 9 TV 2illi 40.67-75,5u 5 586.4 52.5 3 LLHIGH WALLLY, PA. FLLI LUCALLV 1961 12 27 12toh 90.53 74.80 5 609 6 55.6 3 PA.=N,FHID, J, BUNDER 1954 / / 04107-16.50 64.60 o 15.0 35000.0 24 79.5 3 NLM MA MU. 4 19h2 a lo 19:29 17.70 83.50 5.S 2S9.9 300.0 1 SOUTHERN ILLINDIS (MAG. 5.5 M) 19hd i 25 00:05 56.10 69.60 6 11.0 303.2 274.3. 3 SculNLHN MIS $UuMI i 1965 5 l title 36.10 90.lu 6 4.S 100000.0 323 2 281.7 3 SOUTHEA3ftRN MISSUURI (MAG. 4,5 M) 3 a 1963 i n 17iS2 17750 99.50 5 4.1 15.0 3FK.5 28e.5 4 SE. MISSOURI (e!NI.) (MAGS 4.1 MH) e 19h3 " 2 1MllH 37.00 HM.HO 5 3,6 11.9 2Si,2 288.7 3 IL,=Kf, HURDER (MAGA 3*' "HI i 19s3 10 Pa 17i3g-J6.~7u-KI.00 5 1300.0 196.5 72,5 3 GALAA,v.A. (2 SHUCn3) e r 8

L 3 I li' A IL

(:

2.$.2. Table ((cont.) /? ? ? i -l 9 4 e e N13ldwir AL S 32/= 374 1 e ; COOWoS. INftN3ffv Mar.. OfPIM AHf4 DIST AZI= e vt AW MO DA MN Lal. LO'aG. M.M. R.F. (MI) (Mt SU) (MI) MulH Ntt, REMARKS M 1964 I la 23:10 16.80 89,50 6 4.5 11.0 291.6 2Ms.o 4 St. MISSOURI (e!NT.) (MAG. 4.5 MB) 'A l 390e d IM 64:31 14.60 95.S0 a.4 9.0 96.2 240.4 3 ALABAMA /GLUNGIA BON 0tR (MAG, 4,4 M8) 1 1964 % t/ 20:20 33 [~--~i464 e 20 luiuS 3a,20 83.40 5 4.4 24.0 400.0 19atl 163.0 l_ MACON, CEORGIA (MAG. 4.4 MB1 .co Nl.00 S 251,s 123,3 3 NLAR COLUMBIAe 3,C, (eCOURDS) I 1964 4 /3 19:21 31.50 93.5n 5 3.7 620 2 2a3.4 3 wES TE RN LOU [3{ AN A (MAG. St[_HS) l 1942 e 2E 0Ts 34 3f.60 93.60 5 3,7 616,5 244.0 3 mL3fLRN LOUISIANA (MAG, 3,7 MB) 4 2 l 3964 e 27 18:31 11.50 95.80 5 3.4 620.2 243.4 3 aESTERN LOUISIANA (MAG. 3.4 MB) /K TS:19 31.10 93.60 5 4.4 602.9 2a3.9 3 ht3IERN LOUISIANA (MAG, 4,4 M8) 196s a 1964 S 12 04845 86.20 76.50 6 4.S 20,0 521,8 52,8 3 SOUTHE ASTE RN PA, (MAG._4.5 MB) j 1964~~5~25 65326 35~. 5 0 99.00 5 4.$ 11,0 Sfi.0 279.3 4 SL, MISSOURI (alNT,) (MAG, 4,5 MB) t 1964 S /3 09:01 36.50 89.90 6 4 3 11.6 t 310 4 4 SE. MISSOURI _(e!NT.) (MAG, 4.3 MB) 2 2H 27~~3F.30 94.50 4 4.2 637,5 279 l 1954 o t g ,5 242,9 3 TA-La BoHOLR (MAG, 4,2 M8) C I 1964 8 16 05:36 31.40 93.60 623.8 242.9 3 MENPHILL, fr. 3964 Il 11 12:4M 41.20 13./0 683.3 54,3 3 ARNUNM,N.Y. l'865 / !n 21:40 36.40 89 70 6 4.6 11.0 295 8 278,3 4 SE, MISSOURI (e!NT.) (MAG. 4.6 MB) 9 i45S 3 a 15is9 31.HI-9 tit 7 3 S.3 39u,4291,7 3 MISSUuul (MAG.S.3 Me) 1965 M 15 21:46 11.20 89 lo 5.0 t 287 6 289,8 3 Swg!LLINUIS_jFili) (MAG,_5 0 M8) 1965~ M 14 O t il e 57.10 69.20 7 5.0 280,3 288,8 3 _SUUlHut3 TERN ILLINDIS (MAG, b,0 MB) C4 a 3 1965 M 15 00:07 37.40 89.50 5 5.1 302.2 291.7 3 SOUTMnFSI(RN {(LINUIS (MAG. 5.1 M8) 1965 M IS 22:19 31.40 89.47 5 9 9 300.7 291,a 3 30ulHwt3IERN ILLINDIS I 1965__4__1_23 3734,80.Mt.20 S 194.S_111,9 6 CMf31ER, S.C. (4 EVENT 3. 9/8 - 9/12) 5 146$ 09 af~~14,80 61.20 5 es 194.5 til,9 6 CMLSILHe 3. C. td 1905 9 10 02: 12 14,60 81 20 jf~l46S 12 11i25-14.no 8 t I20 S 144,5 111 9 6 CHESitRe S. C. 3 = 9 3 194.5~iin,9 6 CME 5lLN,3, C. hO e 19hS In /4 20:05 31.M0 91.00 e 5.2 160000,0 388.9 291.6 3 EASitRN MISSOURI (MAG. 5.2 MB) 19E5To de 1244S 41,30 70.10

I P

855.7 59,8 3 NANIbCKE T, M ASS, 1965 11 4 03:04 37,10 98,00 5 4.5 2.0 3F6 9 284.8 4 St MISSOURI (e!NT.)_(MAG. 4 $ MB) 1965 12 ~~7~72i ol-4177 6 ~~7 fi40 375,0 00E,,9 Sb,2 3 NIHRAGANSLIT 8AY, R,1, a 196S 12 19 16: 19 35.90 89.90 7 5.3 3.0 308,8 2Fl 7 4 NE, ARMANSAS (elNT,) (MAG. 5,'3 MH) 1966 2 II 22il2-~3$;90 ~ 4 6.~o 0 4 4.3 JI4.4 271.8 3 ARKAEIAS (MAG, 4,3 MB) ~ 3 196b / l.5 17:20 31.10 91.00 5 4.7 4.0 376.9 284.8 4 SE HISSOURI (AINT.) (MAG 4.7 MB) i96* < 26 Deslo 3i.20 91.00 5 5.8 20.0 3ru.e 285,8 4 St. Mf3suuw! (alNr.) (MAG. 3.5 M8 3966 S ll 01:19 17.60 78.00 5 3 1 28000.0 37d S__69 6 3 CENTRAL VIRGINIA,[NAGg_3,I_M8} %f 1967-2' 2~ Uni 40~~df.46-~7f!WO 5 2,4 350.0 196.2 57,5 3 MAHRAGAN3(il UAfe N.1, (MAG, 2.4 M) t 3 1967 e M 00:41 39.60 82.50 5 a,2 4000.0 276,2 21.3 3 CENTRAL UHl0 (MAG,_432 MB) 196i 6 4 l'a i Te-~3 F. h o 90.9n 6 3.8 2h000.0 402.3 2a8,'i 3 GRELNv!LLE, M3 (MAG. 3 B M8) 1961 6 29 01:5F 33.60 90.90 5 3,4 402.3 248.~1 3 GNEENVILLE, MS, (MAGg_J,4 M8) 1961 1 21 01:15 51.50 90.g4 6 3.9 3St.4 290,2 3 300lHEASIENN HISSOURI (MAG, 3,9 M8) 1961 10 #1 35,a0 80.70 S 3.8 270,9_128.4 3 CHARLt3'ON ARLA OF 3.C (MAGo_la8_MQ) __ 9 451 11~72, 0 a pia T7 lo 41.00 73;1o S 2 400.0 676.7 SS,3 3 at3ICMtsitR Co. N,T. 1963 2 9 19_35 36,50 89.90 3,8 310 5 279,4 3__31._M13Sguul_1 MAG,_3,8 MH) 196H 3 6 00818 31.00 84.50 4 .l. 9 3200.0 229.0 69.3 3 WINGINIA (MAG,.6,9 M) 3 (_ LLLI) 196M 1 22 thsel 14,00 41.50 3.T 400.0 209.1 12 F. 8 3 300 lH _ C_4 R(l(j N A (MAGA _ja7 MH) 19a8 ll 1 03514 41.00 1/.b0 FSb.4 $8.S 3 SOUIMLNN CONN, (eCOUROS) 196M ll 9 11342 59.on MM.50 7 S,3 $80000.0 2Fo t 303.9 3 3OUIHERN [((INOIS (MAGA _5 3 MB) 9 196M 12 10 04: 15 39.19 pa.09 5 2.5 $95,0 60.5 3 Hl n JEN3ff (MAG. 2,5 M) t 2 19 ty M le Il logno jn.co 6S 50 5 lj'u 3 3.ly d 3 NIAR_(HUjSVj(({, KY._(*CQORDS) 1969 1 i li'l* 3a.Mo 94.6o 6 4.2 23000.0 469,1 263.2 3 CtNIHAL ARKAN343 (MAG. 4.2 MH) t g . L31.u11

Z.$ = T Tcblo (cont.) s I)- -i e e T HISTHWIC AL 3 515. a22 e o se C04W03 INIENS11Y MAG. DE P f;l AWla DI3T &lla 88 VEAk 'Hf DA HR

LAI, LONG.

M.M. R,F. (MI) (Mt SQ) (ell ) MUln NLF. REFANNS 19n9 1 Il 16:51 16.10 - 85.70 5 3.5 2o000.0 40.6 69.0 3 EASitRN TENNESSEE (MAG. 3.5 M) 's 1969 18 19 2o:00 37.40 Mt.uu 6 4.3 100609.0 214.6 59.9 3 mE SI "!RGIN!A (MAG, 4,3 MB) 1969 12 11 18845 SF HO 77 40 5 3500.0 401 9 69.1 3 VIRGINIA, RICMMUND AREA j 3 1964 f2 Ti tis s 20 15.10 8 3~,. u 0 5 3500.0 95.0 124'7 3 WESILHN N, C. 39/0 3 26 /l:44 36,50 89 70 3.5 3.0 299,'5 279.7 3 SE. MISSOURI (MAG. 3.5 M) (FELT) t 1910 9 976841 46.10 HT.40 5 20.0 2000.0 167.4 84.2 3 NUNIMmESIENN N. Cg i 197n 11 In 20sta 35.90 M9.90 6 3.6 11.8 78000,0 308.8 271.7 3 ARKANSAS (MAG. 1.6 MB) 1919 12 /4 04stM 56.70 69.50 4 4.8 1.5 290.4 202.6 3 Nt M MADRIDe MU. (MAG 4.8 MH) 3911 3 la los2M 33.10 81.90 3.9 8.0 278.0 227.1 3 CARHULL10Ne AL. (MAG. 3.9 M) (FELT) IV7I 5 19 57i35~~TI!To nu.nu 5 3.4 15.0 274TK T28.i 3 URANGEBUNG, S.C ~TMAG. 3.4 MB) 1911 F 12 21891 3h.00 84.00 5 2000,0 22.7 70.3 3 EASitRN TENNESSEE (eCOURDS) 17 71 7 Il UJil5-33.57-32.15 6 2010.0 126.7 133.8 3 hEffLHN SUUIH CAHOLINA 1971 9 11 19:06 38,10 77.40 5 11.0 1900,0 414.4 66.3 3 SPOTSYLVANIA, VA. 1971 lu i 12:54 35.60 90.40 5 12.0 55000.0 337,0 269.3 3 HURIMEAS1ENN ARKANSAS 1971 In 9 itsen 35.90 83.50 5 3.4 11.0 49 4 89.0 3 EASTERN ftNNESSEE (MAG." 3.4 M8) 1972 1 3f 73f42 JE!1a 99.80 4.1 10.6 35F. 77.5 5 NEM. MADRID, MO. (MAG. 4.1 M8) 1972 2 3 18811 33.50 20.40 5 4.5 3.0 26000.0 280.1 125.0 3 CENTRAL SUUTH CAROLINA (MAG. 4.5 Me) 1977~ 174 14TJ4~ 36.20 09.60 5 3 '. 7 6.0 651T6.0 292.2 275.7 3 Ntw MADRID.MU. (MAG. 3.7 MB) 1972 6 les 23:46 37.00 A9,08 4 4.5 8.1 272,1 287.8 3 CAPE GIRAROFAU, MU. (MAG. 4.5 Me! 1912 M 14 10:45 35.0u 80.00 3 3.0 2500.0 319.7 127.4 3 Souln CAROLINA (MAG, 3.6 M) (eCOURD.) I 9 5 11:00 17.60 77.70 5 3.3 2300.0 388.3 70,3 3 RICHNUND, VA. (MAG._3.3 M) 5' fl 1972 "o 1972-9 13~25i?2 41.60 89.40 6 3.7 3.0 250000.0 418.1 327.1 3 LEE CU.e ILLIMUIS (MAG. 3.7 MB) 3. 3 3 ;- 1972 12 F 22:01 40.10 76.20 5 2.0 460.0 531.8 54.4 3 LANCASTER AND BENK5 CUS., PA. 8 1975 I TfEI56 31.40 a7.30 3.2 9.0 192.5 303.7 3 KENIUCKY (MAG. 3,2 M) h, 3: 1973 1 8 03:12 13.80 90.60 3.5 4.2 380.9 249.5 3 MISSISSIPPI (MAG. 3.5 M) r, 1973 1 12 05:57 51.90 90.50 4 3.2 12.0 '365.4 294.2 5 t'ASIERN MISSOURI (MAG. 3.2 M) 1973 2 3 12:35 42.00 11.00 5 832.5 55.5 3 R,1.--E MASS., NOT REP 7 SV SEIS. STNS. i 1973 / 2R HIF72-37.72 75.44 5 3.6 8.4 15440.0 554.9 58.6 3 NEn JERSEY (MAG. 3.8 M) 1975 5 25 01:12 13.M0 90.60 5 3.5 4.2 380.9 249.5 3 HISSISSIPPI (MAG. 3.5 M) i 1973 10 2 2 TITE ~ 35.VI 90.00 4 3.4 6.2 319.4 271,V 3 AHMANSAS (MAG. 3,4 MHLG) 1973 in 9 34815 36.53 R9.59 4 3.8 1.0 293.5 279.9 3 NEW MADRIDe MU. (MAG. 3.8 M8LG) 1973 19 to lil5M 35.15 69.00 5 1.4 20.5 2400.0 23.5 114.4 3 KNUK AND HLUUNI Cu IN. (MAG. 3,4 MMLG) ) 8973 11 30 02148 35.80 83.96 6 4.6 1.8 54300.0 24.5_104,6 3 MANYVILLE,iENN, (MAG._4.6 MS) l 1973~i? ?O 14:45-3o.16 89.58 3.4 6.2 291.0 275.2 3 AEM MATRID, MU. (MAG. 3.4 MSLG) l 1974 1 1 19: 13 36.20 89.39 5 4.3 1.0 280,6 275.5 3 1ENNESSEE (MAG. 4.3 MSLG) i l 177's e is IKr36 3T;D3 vs.i) e 3.5 1.0 5fT!2 758.1 3 ARKANSAS (MAG, 3.5 MULG) 1974 2 15 16:49 35.96 93.03 5 4.0 1.0 6600,0 501.5 257.3 3 ARKANSAS (MAG.G 0 MMLG) l 1914 / 24 93354 35.02 90.3n 3.2 3,1 315.9 269.1 3 ARAANSAS (MAG.3.2 MULG) ) t 1974 3 a 081/4 35.6R 90.35 3.0 3.1 334.8 269.3 3 ARKANSAS (MAG. J p MHLG) g 1974 3 9 #2 f3 4 ' 36.75-39.50 4-5 2.5

.0 dEEI7~275.5 5 N f. a M3DNIDe MU. 1*INI.)

i 1974 3 12 te6: 30 15.66 89.19 5.2 3.1 303.5 268.6 3 f t NNE SSEE (MAG 3.2 M8(G) ) inr4 3 27 isi n - 3n:s4 9a.i3 3 5.6 6.0 365.1 30i., 5 E AsirnN MU. (elMi.) (mig. 5,6 M8) 1914 4 5 17:ns 38.59 88.09 6 4.7 6.n 243000.0 216.4 313.6 3 SUUfMtHN ILLINUIS (MAG.4.7 M8LC) ) ea 1974 4 5 I t al 36.59 99.91 5 2.6 u.h 404.5 299.4 8 (ASIENN MU, (alNI.) 1974 5 8 3 un 52 16.11 89.39 6 4,1 1.0 284.5 283.0 3 nee MADMID, MU. (MAG, 4.1 MHLG) 1 74 5 54 IEI29 11.33 N 0. 38 2 5 3.h 5.0 2084.0 242.6 63.7 3 VINGINIA IMAG. 3.6 MHLG) i 9 e 19ta 6 4 19: 17 38.60 Mg.17 3.2 9,3 leM.5 353.6 3 heuturnv (MAG. 3,2 MSLG) i p i e 1974 6 5~F2i6h-JF;F2~ h4;14 5 3.6 6.8 359.1 303.3 3 SUUIMENN ILLINUl3 (MAG. 3.6 M8LG) t y a ESIIMalt l, I L

2. C

t.

Trble -lg(cont.) } r}ns;_' 1 ~ HIslalkital s 421= 470 e o COONH3 INItNSIIf MAG. DEPlH AWL A D131 Alla se (MI) (ni 30) (MI) MUin Ht t. - REMAwns n vt a H Mtl DA Hk i.AT. LuhG. M.M. R.F.

2.9 1.2 685.4 51.9 3 hta TOMK (MAG. 2.9 M) ea 1914 6

7 lel46 41.57 F3.94 6 1974 n 2 0'l852 33,87 82.49 5 4.9 1.0 14000.0 116.0 141.9 3 GiuliGIA (MAG. 4.9 MOLG) ) 1974 n Il 08: 30 3h92 91 17 5 3.6 2,0 38_4 0 282.7 3 FRtMUNT, MD. (MAG. 3.6 MHLG) 1914 d 22 16: 3 M 8.23 7 4IJ3 5 2.5 7.0 330.2 300.3 5 MAH1334 ILLINUIS (MAG 2.5 M) 36 2 3,0 1,0 175,8 8.2 3 UNIO (MAGA l.0 MWLG) 1914 9 28 21 26 41,24 83,59 1974 10 20 10:14 39.10 bl. 5 3.4 6.6 269.5 33.8 3 MLSI vikGINIA (MAG. 3.4 MeLG) 1914 11 22 00:26 32.90 80.15 6 4.7 11.2 50000.0 317.6 129.4 3 SUUIH CANULINA (MAG. 4.7 Md) 1974 12 to 00:02 31.35 67.47 5 3.0 6.2 36u.5 210.4 3 ALAUANA (MAG.S.O M8LG) 19F4 12 12 21 ue 14 6F 91,88 5 3.4 3.0 431.1 260.9 3 NUwlHEASILHN AkhANSA3 f.AG _3.4 MSLG) ) 3 1974 17 257 7i21 15.73 90.ul 3.0 6.1 315.3 269.7 8 ARIEANSAS (MAG. 3.0 ML) 1975 1 to u9838 Jo 20 91gol 3,2 3 9_1f ' 295g5 8 M133tlONI (MAG _3_a2 M8LG) a 975'~2 I3'I3535 7,52 89.56 5 3.3 1.1 291. F25Y.! 3 NLn MADRID. MU. (MAG. 3.3 MsLG) 1 1975-2 16 1d:22 39.05 ed e2 4 3.3 3.1 243.4 25.6 3 UMIO (MAG. 3.5 MHLG) g 1975 3 I c5:59 13.5s 87.99 4 3.2 11,2 261.0 232.8 3 ALAnAMA (MAG. 3.2 Mt:LG) 1975 5 7 07:45 17 32 80 48 2 3,0 3.1 23F.9 64,3 3 VIRGINIA (MAG d,0 ML) ) 2s76'i4M2h776 23 4 3.'O 3.1 77.0 3D.9 129.3 3 SUUIN CANDLINA (MAG 3.0 MULG) 1975 4 13 16:40 36 54 89 68 6 4.3 1.2 295.F 280.2 3 HEM MADRID Mu IMAGa 4 3 M0(GI 1975 6 a 1 24OSiT27Jh277,.64 4 4.5 6.2 246.9 233'.6 3 ALAoAMA Di AG. 4.5 Me) 3 1975 6 1975 7 6 02:48 36 19 89.49 4-5 2.9 3,0 286.1 275.7 5 Nth MADRID. MO. (MAG. 2.9 MH(G. e[NI.) 3 1975 6 20 03 14 36.56 89.60 4=5 2.9 3.0 30$.5 280,3 5 HEM MADRIDe MO. (MAG. 2.9 MbLG, alNT.) I lt 89 4=5 2.7 3o 372_C 2G6,3 5 7A37tRN M L330UR { (MAG d 7 Mb(gg,al & ) f, D _ 17,25_ 90.g90.58 45 2.0 3.0 312.2 286.3 $ LAsitRN M1330VH1 (MAG 2.8 MbLG, e!NI.) G 1975 d le s ess 975-e_2424 21:01 g a 23 1 3 1975 e 25 01:11 16 89,84 3,0 66 305,4 273.7 5 htW MADMIDs MU. (MAG. 3a0 M8Lg,_e] & ) j 975 5 28 22i23 33.,058276.60 6 4.4 3:1 10000.0 190.4 222.0 3 NowlMERN ALAMANA (MAG. 4.4 M8LG) I. 2 e0 1 '6' 1975 11 7 17:40 33 55 87.16 2 3.5 3.1 233.9 227.1 3 ALABAMA (MAG. 3.5 MdLG) t

1775 11 11 01: 11 37fl4 so.b4 6

3.2 9.3 216.2 64.4 3 3.m. V!NGINIA (MAG. 3.2 MdLG) 10: 17 34 82.96 4 3,2 31 106 7 130.9 3 NURIHut 3ILRN SC (MAG,,,,3a2 MULG) I 1975 11 252 2[iG M G,6754 B% 57 5 2.8 Jh 2 M D 80.4 3 NLn MADRID. MU. (MAG 2.8 M8LT,) 1975 T2 3 1976 1 16 l i g ae l !5 92 l2 5 3.2 e7 432.9 272,5 3 NDHTHENN ARKANSAS (NAG, 3.2 M8(G) 19 7irl-[9 018 21-15.,92 el.e2 6 4.0 3.0 75.2 24.4 3 meistuCar (MAG.4.0 Me) ~ t g e8 1976 I lo 13:59 39.68 Fe.17 4=5 2.8 9.0 428.4 50.5 5 mLST va. (MAG, 2.8 M8LG)(elNLT,) 1916 2 2 16:14 41.96 82.67 3.4 6.0 429.4 11.0

3. ONIARIO (MAG, 3.4 M8LG)(alNI,)

0 3.0 64,9 196,7 5 ILMNESSLE (MAG._S.0_M8LG) 1976 2 4 14:54 35 00 84.15 6 3,$ 1976 3 11 Glilo 41,56 7831 6 3 a09.7 57.1 1 RHUDE ISLAND (MAG.J.5 M8LG) 1976 3 11 16:07 40 96 74'37 6 2.4 2.5 644.7 54.1 3 NORIHLASIERN NEM Jt HSL Y { MAGA 30iiliit RN htW LNGLAND (MAGD.ds4 MdkGI 14 15if2 Ef,.i6 69.97 5 3.0 87f.2 58.4 5 0 MiLij ~ 1976 3 1 90,48 6 4.9 9.0 108000.0 342.5 268.3 3 ARNANSAS (MAG.4.9 MB) 1916 5 24 18:41 3[559 1976 3 24 19:00 61 90.48 2 4.1 9.3 342.4 268.5 3 NOHIHLASILHN ANAAN3AS (MAG. 4.1 M8) 1976 4 a 01:39 19,35 862 8 5 3.0 12 4 270 l 333.0 3 CLNTHA W DIANA (MA9 d se_MU(E) 2 1916 4 13 10:39 40.84 74.05 6 3.1 1.2 19.0 655.3 55.4 3 NONIG ASIENN NLA JLH3LY (MAG. 3.I MOLG) 1916 4 15 Ol_soe 37,40 8F 30 5 5, 3 9,0 192.5 30s,7 3 nLNIUCK_L(MA9 d.S MUL9I 3 1970 5 9 20: 14 41.54 11.01 5 2.F 888.6 'J t. 5 5 30 NEn LNGLAND (MAG. 2.7 MULG) 1976 5 22 01:41 th o4 89.H4 5 3.2 6,0 305.4 273.5 3 Nt M MADRID. MO._,iM AE a_Is iLMILG I g na 1970 6 19 00:54 37.16 nl.62 5 3.0 3.1 183.8 55.6 3 30ulHLHN nL3T v!NGINIA (MAG. 3.0 MSLG) si 1976 9 li 16:55 30 60 50.81 6 3s 3 3.1 6800.0 205,0 75,8 3 AHM Aii3AS (MAsd_.hj M8(G) IUAST M.C_ d MAG 176 9 2578iuf 35,.el 9%is 6MiU) 9 5 3.6 3.0 Jii.; 268.5 1 n I ts 22 15:48 32 20 ed F3 5 Igo 3.0 356,2 225,5 5 MISSISSIPPI (MAGA 3.0 M8Lg}1e_lhlal._ 1976 e 1976~12~ll Oli'65 16'.12 91'.07 4.2 3W.8 294.7 8 M13300H1 (MAG. 4,2 MU E o e i 7 i e a L381NAll C 0 C

2.$* ll Tabis +gcont.) S2 '? ",' t ~ HISTUNItsL3 47t _519 Cn0RDS. INTENSITY MAG. nLPIH ARLA DISF All-yLAH Mo 04 MN LAI. LUNG. M.M. N~. F. (n!) (Mt 30) (MI) NUTM RLF, NLMARR$ ~~ 1976 12 Il 02:36 3 T.8 0-90.24 5 1.5 3.0 3a9,7 293.9 3 E ASTE NN MISSOURI (MAG.3,5 Mu(C) IV76 12 21 01:57 32.22 82.46 5 3.7 3.1 276.4 156.o 3 Sou!MLA$lERN GLORGIA (MAG. J.F NBLG) 1917 1 3 16tST 37.55 89.74 6 3,4 3.1 320 1 292,6 3 LAPL GIRARDEAU, MO. (MAG,3.4 M8(G) 3977 1 16 13i29~ 13.67-85.20 4 3,0 3 71 3iT,7 128.1 3 SoufM CAROLINA (MAG. 3.0 M8LG) 1917 2 21 15:06 11.09 FM.h3 5 2,4 3,1 346.8 64,7 3 VIRGINIA (MAG. 2.4 M8LC) 19FT-3 30-~0ll28 3 2 ~. n M 66720 5 f.5 6.2 316.4 129.9 3 80UIM CANULINA (MAG. 1.5 ML) 1977 5 3 20:00 11.9M nM.a2 5 3.6 3,1 355.7 221.7 3 MISSISS!PPI (MAG. 3.6 M8LG) 177T 6 17 10:40 a0.11 d4.58 6 3.2 3.1 212.0 333,2 350.2 3 OHlu (MAG, 3.2 MBLG) 1917 f 27 17:05 35.42 M4.42 5 3.5 4.3 32 5 183,F 3 ItNNESSEE (MAG. 3,5 M8LC) 19 7 T 8~24 2112 57T.397.~E 9 4 3.1 6.2 27 8.4 3 SUUili C ANOLIN A (MAG, 3.1 M8LG) 19FF 11 e 05:21 13.83 89.2n a 3.4 3.1 312 0 2as,3 3 MISSISSIPPI (MAG, 3 4 "BlGI t 19 7T~ll 25 22i T8 la.'5272 96 4 3.1 371 . 44 61.4 3 AHnAN D5 (MAG. 3.1 MutG) 9917 12 IS 14: 17 32.92 80.22 5 3.0 5.6 313,7 129,7 3 ' SOUTH CAROLINA (MAG.3.0 M8LG) 1977 T7 70 12:aa 41.84 10.10 5 3.1 841.i 56.6 5 SouiMLHN wtM LNGLAND (MAG. 3.1 MeLG) 1978 I A 05: 14 32 76 89.24 3,0 3.1 308.5 226,6 8 AL-MS BORDER (MAG 3.0 MBLG) 1 g 1978 5 li 13f26 36.75 60.14 5 2.8 4.0 211.3 72.6 13 GALAke VA. (MAG. 2.8 MULG) 1978 4 3 06:24 36.62 90.00 3.1 3.1 311.0 280.8 8 MISSOURl_(MAG. 3.1 MBLG) i 1978-3 2h 14i35-19.7o FA724 3.1 9.0 426.2 50.0 6 MANTLAND (MAG, 3,1 M8LG) 197n 6 1 20:07 38.e2 88 e6 4 3.5 12.4 284.5 309.1 8 ILLINDIS (MAG. 3.5 MHLG) 1976 6 9 17: 15 32.09 8d.58 3,3 6.2 356,0 223el 8 M5=AL UONOLR (MAG,3,3 M8LG) Ti 1978 1 16 01:40 39.9) 76.34 5 3.0 3.5 519.4 55.1 15 PENNSYLVANIA (MAC 3.0 MULG) 1478-B 15 7 Tf2 so.4 F 71 T3 3.5 !6.8 784.o 62.e 5 ofF CoASI 0F NLMiil. ( Miii. 3.5 M8LG) l 3,* 19T8 6 30 18: 31 16.05 89.42 3.5 2.5 281.9 274.1 5 HEM MADRID, M0 (MAG. 3.5 M8LG) s 1978-4 25 0Ki?i-38.57 90.26 'l 3.0 1.2 313,5 301.5 5 MIS 30uMI (MAG. 3.0 nsLG) 66 1918 9 23 01:14 33.65 91.89 1_ 3.1 1.2 453.2 252.2 5 ARKANSAS (MAG. 3.1 M8LC) IV78 le 6 14:25 34.91 16.51 5 2.8 3.1 513.1 54.3 8 SUUlHLASIfNN PA. IMAG. 2.8 M8LG) 1918 12 4 19:48 18.62 8M.36 5 3.5 15,0 4400.0 288.8 312,0 8 Sou1HERN ILLINOIS (MAG _3 5 M8LG) 3 3 1978 12 t o 20157-3t!95-3B!a8 5 3.5 3.1 359.5 222.0 8 MIS $1SSIPPI (MAG. 3.5 M8LG) l 1979 8 30 11:11 40.32 74.23 5 3.5 3.1 2800.0 629,2 57.9 8 NEW J E R S L'Y (MAG. 3.5 MSLG) 1779 2 4 25tTF-35.84 97/d5 4 3.2 8.7 31V.0 268.9 8 AMMANSAS (MAG. 3.2 M8LG) 1979 2 2F 16:55 35.92 91.2a 5 3.1 5.6 383.7 272.3 8 ARKANSAS (MAG,3,8 MBLG) i 1919 3 9 21:50 40,12 14.50 5 3.1 1.9 630.7 55.5 8 hf M JLRSLT (MAG 3.1 M8LG) 1979 6 10 22:12 36.1F 89.65 4 3.8 7.5 298.9 275.3 8 NEM MADRID, NO. (MAG. 3.8 MHLG) 1917-E 25 II s il 3TI55 90.43 4 3.2 6.8 340.2 267.6 8 ARRANSAS (MAG. 3.2 MHLG) 1979 1 8 06: 35 16.A9 89.29 4 3.1 1.9 281.5 2SS.T 8 HISSUUNI (MAG, 3.1 MBLC) 1979 o I 14:12-14.22 61.30 3.0 1.2 209.1 122.6 15 SOUIH CAHOLINA TMAG. 3.0 ML) 1979 9 13 00: 19 35.24 84.38 5 3.7 3.1 44.9 180.0 8 30ulMEASTERN TN (MAG _ 3.T MSLG) 8979 6 25 /0:31 34.93 02.97 6 3.7 1.9 e=00.0 105.6 129.4 8-t hE55EL. SC -(M AG. 3.7 M8LG) 1979 9 12 cla2e 35.59 85.90 5 12 3.1 14.1 127.3 8_ LASI TN. (MAG, 3.2 MULG) 3 l 1979 11 9 l-slo 3F^. 4 2 e2.88 3.5 6.2 193.4 24.9 3 NL nLN1utny (MAG. 3.5 MHLG) 1979 12 30 09: 15 41.16 F3.11 4 3.0 2,5 661.5 Se,5 8 EE NEM YORM (MAG.3.0 MHLG) 1980 5 5 12:37 ao.17-75.16 4 3.5 3.1 562.8 56.6 n SE FLNN. (MAG. i.5 NHLG) 75.10 5 3.7 3.1 584.6 56.9 8 St PENN, (MAG. 3,7 M8LG) 1930 l il Olson 11 %.16 a0 u 19WL 5 iz 2o:23 I na.45 3.3 it.e 265.2 303.3 8 soul ME NN ILLluul5 (MAG. 3.3 MnLG) (MAC,_),! 3.(0 MfsLG) se 19n0 1 25 1683M 47.65 86.69 4 3.3 3,F 175,e 314,0 15 klNTUCKY 3 PE G;, 31 8950 5 d lilU2 ed.26-75.03 3.0 591.1 56.5 8 PENh3YLVANIA ~ (MAG p 1980 h to 16:41 15.45 8/.8n 3,0 89.7 109.4 15 h0 RIH CANOLINA (MAG.W LG) 3 0 MIILG) 3 o 1939 6 25 i1112-3V.78-bat 05 4 5.3 3.1 20.1 117.l a liNatsstt (MAG. 3.3 7__. e a ESIIMAIE s n

7 oe a * 's .;P Q*: ) G ) ) ) L)) G G 8G3 e ) ) L L) MLi

z. t LM M

M L gB O 8 G 85)) n 0.MDG G S. (o G L L O U c M 2 M 37, 8 S z 1 L1, M M ) ) ~ 3 5 5C3 G3 ,23 1-9 5, G ,0 5, G L ) L LG ))) 3LGG 3 ,8 ,G 8.3BI. GM GL MG MMG G3 L a . A A8 A ( A A 8S8 l G0 M M. .M MM G MlMM

0. (M h

A A ,( (G G (J( c M 11 M3D A A5 6,0 T V Y .( M ,S M M ( G I( (3 34 K gK3 , Y. ,G ,N D . CGC G O UA 0 gA N OA UE NA A, M I M 1G M MM A IN NGGG N( NA (N (EM LIIA AA ,L LM R DE LL LM MM O MY M( TE D ,A N IO O((( 3I E ETINI R R KR NS NY SS RNRN 4NA AS3. RD RRRK RA 0ETR l C N CIUI

TMEl D

AA LEEC EE R LEK S iN HN E MM HJMU JN M M l II T T T III E l IT i R m MpRN M0 =3PUVR A 0U U LR E M E OEUEE0 M. E A O M CS 5N NIAW I N NNNNN5 T S 5888 8 8 55 55 55 55 55 E ,8 F e L R 3,56,6, 09,39,3,6,9,953, 46 3 H g 3 l I 19T6s94 476681 88O2 l U8 S4a55 166560 09 7 31 12 22 A N2 33 2 2_2 7, 71,1 3, 6 7,1,48,3, 8,4,5 8l 8 a, T ) S I3 9765 66 2350 32 69 54 I M9 5344 878975 41 1816 D ( 2 16 11 562228 31 1232 0, 0,0, ) 0 0 0 0 A 3 0 0 0 L 6 8 8 R ) 1 a 9 A H 3 ( 2 6, 8,

0019, 8,1 2, 0 3,1 21 38 5

H g.. l73331 18 63 i1 4351 56 l P l 1 L M D ( 5 11116,2 8,0, 0. T.8, 0 55 6,0, . 1.. G 3 5333 33 33 32 33 33 34 A M f F, l i S H N E a 7 33 4 55 45 5 65 56 I N M. I M 8 152268 30 3297 33 l1 , 5, 9,967,46,1210 e0 7 d,1 91 G . N9 34 44 43 999172 2978 9 3 U8 H7 887F M851 58 68 n L 0 F 25978 5355 1 9 9 e. l 0 1 1 4,!. e,7 6,~

5. A. 4 3,8.G,

49 I D 89 0 ,6 1 5 C I 5 3 A6 n0779l 65715557 I4333a3374735333 5 L3 9 5 21 99 e14534I1 2634 1 5 52i4T3T542S1 2135

il 5

P :

:i: :

l si:

8 H232?16321Ra92 662S 011?25201Dc10 10hO 1222'53 S 28l 5 l9 59VF L A5 a O 2 23 I 2 C I u1 7 8 66 69 22 <4 ee 4h 68 w m 1 G I R0 000050011111 111 1 S A 88663484 888888988 ~ E99979999999999999 I H y1 1 1 3 1 13 1 11 1 1 1 11 1 1 n.r* ~ s l'I ,3

. 7 a t e&

ir' 3, r l ) ) J

~~ 'Page - I' (82-0354) #7I ' ~ ~ ~ ~ ~ T/6LE 2.5-2 NOTES in both Tables 2.5-2 and 3, the data are in chronological order. Portinent abbreviations are as follows: Year. month (mo). dav (da): Date of occurrence Hour (hr): Local time of occurrence, rounded to the nearest minute In either Central or Eastern Standard Time. Geoornohical Coordinates of Entcenter (COORDS): Latitude and longitude of epicenter In decimal degrees (north latitude; west longitude). Intens t tv (M.M. ) (R.F.): Maximum reported Modifled Mercalli (M.M.) or Rossi-Forrel (R.F.) Intensity. Magnitude (Mag.) (MB. MS. ELG. Mt. M) : Five distinctions concerning magnitude are made in the listings. Body wave magnitudes def ined by Gutenberg and Richter (1956) (Ref.162) are identif led as such in the remarks by the symbol E. Surf ace wave magnitudes as adopted by the International Association of Selenology and Physics of the Earth's Interior (I ASPEl; Bath,1%6, p.153) (Ref.164) are identifled by the symbol ELG. Local magnitudes calculated using f ormulae def ined by Richter (1958) (Ref.165) are identif led by the symbol M.. Reported values for magnitude which were not defined by type in the source ref erence re identified by the symbol M. Depth: Hypocentral depth in miles. Ataa: Felt area in square miles. 2.5-75 a Amend. 69 May 1982

Page - 2 (82-0354) #74 Distance from site (DIST): Calculated distance f rom epicenter to site in miles. Aximuth ( AXIMJTH): Aximuth In degrees measured east of north from site to opicenter. Jhmar.As: Brief description of geographical location, type of magnitude, and other pertinent Inf ormation. An asterisk (*) Indicates Information which is uncertain or taken f rom a source other than that identifled as a primary ref erence. l 2.5-75b Amend. 69 May 1982 ~ ~ ~ ~

SEISMIC 1TY REFERENCES (refer to historical listing) Ent. 'lio.

1) Cof fman, J. L. and Von Hake, C. A.,1973, Earthquake History of the United States, U.S. Department of Commerce, National Oceanic and Atmospheric Adninistration, No. 41-1 (through 1970).

2) Moneymaker, B. C.,1954, Sane early earthquakes in Tennessee and adjacent states 1699 to 1850: Tennessee Academy of Science Journal, v. 29, no. 3.

Moneymaker, B. C.,1955, Earthquakes in Tennessee and nearby portions of ..c!ghboring states 1851 to 1900: Tennessee Academy of Science Journal,

v. 30, no. 3.

Moneymaker, B. C.,1957, Earthquakes in Tennessee and nearby sections of neighboring states 1901 to 1914: Tennessee Academy of Science Journal,

v. 32, no. 2.

Moneymaker, B. C.,1958, Earthquakes in Tennessee and nearby sections of t neighboring states 1926 to 1950: Tennessee Academy of Science Journal,

v. 33, no. 3.

Moneymaker, B. C.,1972, Earthquakes in Tennessee and nearby sections of neighboring states, 1951-1970, Tennessee Academy of Science Journal, v. 47, no. 4.

3) United States Earthquakes 1928-1978, pubiIshed annually by the U.S.

Department of Commerce, coast and Geodetic Survey from 1928 through 1972 and jointly by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration and U.S. Department of Interior, Geological Survey from 1973 through 1978. 4) U.S. Department of Commerce, National Oceanic and Atmospheric Adninistration, Environmental Data and Information Service, earthquake data f 11 e: an unpublished Iisting of earthquake Iocations; Earthquake Data Services and Publications, Key to Geophysical Records Documentation No.15, U.S. Department of Commerce, National Oceanic and Atmospheric Adninistration, Environmental Data and information Service, Boulder, Col orado, 1981. 5) U.S. Department of Interior, Geological Survey, Preliminary Determination of Epcenters, monthly listing, January 1972 to September,1981.

6) Law Engineering Testing Company, Earthquake data f!les, unpublished data.

2.5-75c Amend. 69 May 1982

~ ' Page - d i82-0354) #74 ~~ ~~ ' ~~ ~' ~

7) Helgold, P. C.,1972, Notes on the earthquake of September 15,1W2, in northorn iIIInois, IIIInols Geological Survoy, Envf rofunental Geof ogy Notes, no. 59,13 p.

8) U.S. Department of interior, Geological Survey, Earthquekes in the United States, circulor published quarterly,1974 through 1980.

9) Nuttli, O. W.,1974, Magnitude-recurrence relation for contral Missi ssippi Val ley eer'thquakes, Bul l. Sel sm. Soc. Am., vol. 64, no. 4, pp. 1189-1207.

10) Bradley, E.

A., and Bennett, T. J.,1%5, Earthquake History of Ohio, Bul l. Sei sm. Soc. Am., v. 55, no. 5, pp. 745-752.

11) BoliInger, G. A.,1975, A catalog of southeastern United States earthquakes 1754 through 1974, Research Division Bul1. no.101, Virginia Polytechnic Institute and State Universliy, Blacksburg, Virginia, 68 p.

12) McClain, W. W., and Meyers, O. M.,1970, Seismic history and seismicity of the southeastern region of the United States, Oak Ridge National Laboratory, Oak Ridge, Tennessee, Union Carbide Corporation, for the U.S.

Atmic Energy Ccenmission p.1-43. 13) United States Department of the Interior, Geological Survey, Earthquake Inf ormation Bulletin, published bi-monthly 1%9 through 1981.

14) Docekal, J.,1970, Earthquakes of the stable Interior, with emphasis on the Midcontinent, unpublished Phd. dissertation, University of Nebraska.

15) BoliInger, G. A., and ElIen Mathena, Seismicity of the southeestern United States, Bulletins 1 through 8, April 1978 through November,1981, Virginia Polytechnic Institute, Blacksburg, Virginia.

16) Stover, C. W., Reagor, B. G., and S. T. Algermissen,1979, Seismicity map of the State of Tennessee, U.S. Department of Interior, Geological Survey, Miscellaneous Field Studies map MF1157.

17) Nuttli, O. W., and R. B. Herrmann,1978, Credible earthquakes for the central United States, state-of-the-art for assessing earthquake hazards in the United States, Report 12, prepared for the of fice, Chief of Engineers, U.S. Army, p.1-99. 2.5-75d Amend. 69 May 1982

Tablo f 2,g g 2 61... e T . I LARIHOUAKES IN CHRONOLOGICAL ORDER FNOM S!lt Al e 5/10/82 CRBHP MG2200 ee N,

LAI, 35.89, M. LONG. a 84,38 et a

ee SELECTED UT RADIAL CCllEH14 hMEHE 4 MAX. HADIUS h 50.0 M1, CT h)OM E Mg) Cf Mi$ W Z.$.2 CHORDS. INIENSIIT MAG. DEPIt: AREA DISI Alla YEAR MO DA HH LAT. LUNG. H,H. R.F, (MI) (HI SQ) (HI) NUTHRLFl6 REMARES 1777 11 16 02:UN-3576F-RE750 4 22.7 10.3 E. IN. (ADD. REF. 17) (ellME) 180s 11 26 01:n0 16,00 84.00 6 22.7 703) ! NNOXVILLE, TENNESSEE 1 75 lT T7 62soO 35.50 84.00 3 22.7 70.3 16 E. IN. (ADD. Alf. 2) 8 1817 5 25 00:00 16 00 80.00 3 22.7 70.3 16 E TN (ADD. REF. 2) (eTIME) 3 gg 1871 II 16 07:3K-~15.50 6e.00 5 5000.0 34.5 141.3 1 ht3ILRN NONTH CAROLINA AND EASTERN IENN 1884 8 25 19:45 36,00 84.00 4 22.F 70.3 16 E TN, (ADD. REF. 2) 191T-l 24 Tsi50 36.20 a3770 1 2700.0 43.7 60.5 1 LIlliREllNNESSEL 1915 4 IT 24: 10 35 30 84.20 5 3500.0 42 0 165.8 l E. TENN,(eTIME ll30)(INT. 5=6

REF,2) 3 3

3913 5 2 11T3 6-~35.50 e4.40 3 27.F I82.0 16 E. IN. (ADD. REF. 2) 1 1913 a 3 11:45 36.00 84.00 4 22.7 70.3 16 E. TN. (ADD, REF. 23 1914 1 23 27i74 35.60 84.50 5 21.1 198.2 i LASI TENNESSEE FLL1 UNLT LOCALLT I s t2,7 E, ii,LLEe(ADD. REF. 2) 5, 1911 3 e 21:07 36.00 84.00 3 22 F0.3 16 TN 1918 I IE 10i45-1ETW5-85.00 5 7 70.3 2 KN0 l ILNN. (*CDOROS) G s , a4 1918 6 21 20:00 36.10 84,10 5 3030.0 x21,4 47.3 i LENUIR CITY, TENN. A -9 192512 ?d 62T36-36.00 85 50 5 15.4 282.6 i LASI TENNESSEE FELT LOCALLY h' T 3921 12 15 08:20 35.80 84.60 5 5000.0 ,13.7 243,0 2 EASTERN TENN. (eCDCADS) P on 1930 a 30 04:48 35.90 84,40 5 1.2 305.9 2 NEAR RNOEvlLLE, IENN. o 1930 to 16 16:50 16.00 84.00 5 22 7 701 3 3 EAST TENNE 3SEE t s918 T11 BSiTd 15;60 e3.60 e 48.2 Tiii.3 16 tT IN. (ADD. REF. 12e2) 1941 3 e 01:15 36.00 83.90 3 28,0 74.1 16 E TN (ADD _REF. 17el2) y t t 1957-6 6 07iS5-lE;00 64I00 3 22.7 70.3 16 E. IN. (ADD. REF. 2) 1948 2 9 19:04 36.00 84.50 5-6 10 0 319.2 2 NEAR LAFDLLETTE,TENN (*COHRDS) 2 1950 6 le 23IT4-I5.8p 84.00 e 22.3 106.1 16 E. IN, (ADD. NLF. llel2) 1953 11 to 09:45 16.00 se.00 4 22 7 70.3 16 E. TN._(ADD _REF _2) t g g 1953 12-~5 68i45-15;65-83;10 4 22.7 70.'3 16. E. IN. (A6D REf. 12,2) 1954 I to 00:00 36.00 84.00 4 22,K T8T;4 7 70.3 16 E TN. (ADD, REr. 21 (ef8MF) AfAEs37l[NN. IN F.M. 195E-T 2T obien-15;15' 64su0 5 45 3 1955 1 12 01:25 35.80 84.00 e 22.3 IC6.1 16 E. IN. (ADD. REF._2,3) 3455-I 15 14: 14 36.00 M4.00 4 22.7 70.3 16 E. IN. (ADD. REF. 3) 1956 9 7 081Sh 35.50 84.00 6 8300.0 14 5 141.3 3 _E431LRN TENN. 3 14S6 7 ' esi'49' 15;56-8a.00 5 34.5 148.3-3 EISILRis TENN. 1957 6 /3 01: 14 56.50 84.50 5 22.g7 358.2 t&~ E. Is! TADD. REF. 2) 42 2 LAST CENTRAL TENNESSEE 1957 II-T 12ilS~-~16;do-84!05 4 T-70.3 195% 6 12 20:00 35,40 84.30 4 34 2 172,2 16 E. IN, (ADD. REF. 2,3) t 19iin-C15"D 5 i l F-15;B 6-8 %'U O 5 1300.0 22.5 106.1 3 EATTENN ((NN, (*COUNDS) 1964 1 28 00:00 46.00 64.30 3 89 31.3 16 E _I NIEd 1465.g_RE F. (ADD 3,2) (* TIME) t i954 tir 13 tiilo 16,66~ 84;co 3 22.,T-7073 16 E. utF. 372) i96h 8 /s 01:00 35.80 84.00 e 22 3_I_u6.1 16 __ E, IN. (ADD. REF. (1r,3) 3

ESTIMATE

y

e... o.oa r:s wennuA e e

s m O J K mm GS ^M J

i ws M

8 CQ mm ww a T a O EE e 8An E E.* J IV um

=

m O F m W4 E WWW OO E d e a m .E EEE Oc a q .O e. m mw wmm ge m J m e+ ww. _a o m. J am.Ja O O m 002 ww w J .J O. e N uwk 3G ER e E eNmeW g A E N @mmm mm.J J OE N m m 4 w mm w 4 m 'M M Mm p O. m 4 E N.e.mM. J J OE EE E E E W .w a w. qN g w w m b A w h* .bbbbk e.h. 4 S.. O.m. M m a wlw e m p wwwWW 2 E W EEEMC2 2EEE E NNSO .WN ON N W WWD 2 e O 4 2 22QW. E w E .E 2 3OO22J-OOODO GGwwpE WG wsp W O OlO w R .OCQQQ 4g ww Od 4M M> gwe> W4M4

J 4 ZR W

.e= KEWEk g www O Jw ww wwwwWF .Qwwww E2 222 J MZ E m.M 4E .E g g M. . em W m. EW 22 2WW >2 22 22 22 w E2 WE E W ww ww wwww 2p Em MMO E M 9 E W e 4 42 4. WQg0 .W e E W WW WW WE LW WW WW WW-WOWZW WW W M> W 44 4M MM 94 4444 44 9m me pp Se p W .M=== =

== == == m

== = = b 6 w E S. 3.m.4.m.O.N e. d. e. 4 A. w. k. w.e.e.9.N..h.m. 44 $ E e w t eO OOrw we we we . memo > em Ne> N d e> >Wom OO OO OOPhWmpN ad amm g E m mm mm mmNN wN m Nw wN N . h > h e.r e.m.A.m @ r.e.m pN m.e... w p e m.m H me . 9e ee n. e MMO SNNNWmMWWWNW W Newe bMOD N M EW WN NN WN NN NN NN W 9W em TNNM9 43

e.

O. O.O. m GO O S O .t MO O O O N O O W 9 K MO N N W 4 EN n w S. e.e. - O. m. O...P. O.. O.S. .z. o -Om em v... meg a 4 9m e E m =N w E O c. . ~,n. c. ~.N.. O.. O. a m em NNmN em NN oN N E W L. -= = 2 Ne em oc .N em em eN cc .c w 2 E. a C a C a c e.me.a a.n e e N .ekane.F O . o. m e - m m. . = N. P. P.. F.. - ~ ~ O. O. O. L. . O. .~ 3. . L. 7 m. . e.. .F. e o e e.. O s - aC O O O O O O O O O.O.O..O N@ NOWP Nd Ww a... O.. O.P. ~... P. e.. m.. w.e. m. N u 4 44 4 4 4 e b'.i M @ mmeAmom @Am e Jm emmmememem9memmmmmememe (mewC=mOcc .e m m@ emehre .NNh 4 ._ M O E @. E @_ G O r mp o_ p m. N O O N_ C N_ NabNM m @ wm z._ w r-w~N- -.~cO-om-w z w oo N am DC -dom mm -OOO -N -0 3 m 4W N PO DO 95 Nehe eN >mAM M .J e m. o N-m em NN -N-v~N W 2- ~~ =O vN vN oc ~~ .~ m o ze Per==m emememn@ % eye P o.p - - M p44eWhhh %>AhhhNmNNWh W P. PPDPPP.P_ @ P_ P. P. P. P P. P P_ P_ P_ P P_ _P P_ P_ m 2 w 230. I-21 _ _... _ nin a..~..c l

ien. l:!I !! J il i i:I!!n 8 i i !! lji II 9 !! :a E2 ( r ii i i i i i

1 un H

e. ii i i i il jii E! 1 8x I,

g: Es E"C

'I a s .s s i

t. 5; is
=

ia - 34 I w. i:oooo wi e t p 1 sso Cf _,_ x 4? ~~T j i i H!; ~ ..!_ _- l .D h[

1. [, o g I

i .i li s . __J l .i t o ' Qi i e4-7?d-/- ~ i 1l / .____. l._ _ L - A ! liO~4Ad j i __s N !e I s.L__g, -Cr i' s .h-l O &sL'-Q GG,& } l i --. ) - __. __.] lg p; -1 ,A =x i b O ;[ il CO. i 'q ~'l : -_O. 0 \\ x h.! i ? @4i ~l* g l t - - - - -. y -4 ~ lO 6*'~~' x _ O ll y-rdhi l ! N g glol g % 7 " : :. g il l ll VIgp~Tb....i.T n gy i l \\ .y. 23o. i-2 y

<1 s> f!:enl s c_ g \\ r=

.. Eg.

5 t + Il it'! O 5 ll!! C r T tig!!! m-

is I E e,

3 E I: J. g ff: # I.I,fr ii !! N sg 3., i I" is. :: oobb b g 4 ~ = - - ~,., _. O

S*W

, e I O g I t a g b a i,T . L __..- w j I a. .i I i j- ,"~~~~~ I f i i ~ ~ d.. l 3. ,s r. j l!L._.~ Q, p( K i.N.. !c !,_H _1 i7._- i, _N o i .1-p,a ' n i pU i % i (( l ph j a, f J." o- ; 1 = .c.. i,, 0. e .a

i.

(. i g l,g, - -- O/, s' -i. !,,",3 l., j,r. I =a .I ! p j (io l -o c b _[j $f'~ E' M i l I- - r.__ i ; o..s

W.r, \\--

h) g r -~ ~ ql .s 1 a ' D Q.. i o . i.i r s J l e. e; f N\\ l -y

-n er -

f ' ' !a '- l g ag a 'b., e j hl i i Il l. ; i l(l..l.o(??.%, I a ~ I. i I l ja s [ [ L I, 3 .;y 1j; f a spe, gg, me we Ne Nes me.

I) i\\ll ll jlj l I! 9 l ll R S O U D P I NE D 3 AZ 3 N A i EU R -{ M H E )Y U v. V Y Y Y Y A T L T T T T UI T Ti I I T I S s S QW MS 4 i. s 8s i t I N N N N N N HS E E E E E E TE 0 N f T T T T T T RK 5 E f N N N N N N AA Y N l T e s I I I E i. EU T N I V N T E. M I TQI H (I I s 8 S Vt LH t, t on s, 'V V t ET i I .V FR WI E T I I D T V V NA t 3 N UEI S S 3 N E EE KH G AT 5 o E UF Z N L QO p HTR 9 A e' ilgiI ;Il! j (' t! .,l' 8 i *,, E s A A [8' - -. P g. b N 8 /; i I A T L L O O I N R R I A S A G C C bT R H H I V T R U O O f,I N S s 3 ) I;,' lg*

l'

!f l;* ,I

3 I

r\\ J s E. n i w s \\ = a N @3 / l ,i

1 4

8 o ~ A I G gJ R c s O s ~ a E \\ E T G I S /

5

/ 6i li

8 Y

E K E C SS U T E l N G . N E N ES t N N g K E LU A R P I .T MD A E M-I 0A M E $R A N OC 6 I 8 ,jif. B A G G lil L N N A E 1T lib

i!

l ,.i ',i W S j jI! ? l. 7 6 A E 1 5 L T._ 3 3 3 3 M s '- 3 v r i-! I f! Il l !l-

8 86* 85* 84* 83* 82* e j ( l l N a 37' if KENTUCKY I VIRGINIA. 1 J / -e,. I [ ~N i J TENNESSEE / i s fv '3 6' dV / Q 3 I l _/\\ s b I s LEGEND t I i I S1TE X f m7;q_ r i L 1.F M AGNITUDE e j, \\ ' NORTH CAROLib:A ~ 3 us [ RADIUS A-] ~[ 50 MILE / 3.9 M AGNITUDE ~ g ~ '. / 0 L g o-4.0 MAGNITUDE l- \\ s SOUTH CAROLIN'A EVENTS WITH UNREPORTED l 1 MAGNITUDE ( g i ALABAMA l GEOR GI A l L l l e i 8 4 l i e i s l g 34* i t 25 0

25 MILES

=====rs

==2 EARTHQUAKES WITHIN 50 MILE RADIU! OF THE SITE (MAGNITUDE) 1 --bAW-ENGINEERING- {g gm g,g,gg, f g 9,f p _q ~ TESTING-COiviran 1 V - ^

Paga - 1 [f.,2-0342] #68 i i Ouestion Cs730.2 On Page 2.5-25 the PSAR states "This province has been designated as the Southern Appalachlan Tectonic Province by the NRC in their evaluation of the Sequoyah Nuclear Plant." The NRC staf f's position as stated in both 'he t Sequoyah and Wa+ts Bar SER's Is that these sites are In the Southern Valley and Ridge Tectonic Province.. Change the tectonic province statement by either correcting the name of the tectonic province or by not attributing the designation to the NRC. Resoonse .l The response to this question has been incorporated into revised PSAR Sections 2.5.1 and 2.5.2. i i QCS230.2-1 Amend. 69

~ ~ ' ' ~ ~ ~ Page - 1 [82-0320] #69~~ " ' The Kentucky River f ault zone (see Figures 2.5-2 and 2.5-2A) trends east-west f rom eastern Kentucky westward across the Cincinnati arch. This f ault zone dies out on the western flank of the Cincinnati arch. The f ault zone has a total length of about 150 mil and a width of about 25 miles. The closest f ault to the CRBRP site within this zone is approximately 90 miles to the north. 1 Faults in the Kentucky River f ault zone are mostly steep, en echelon normal faults, and bound smalI grabens. These f aults also show some strike-slip movements. The maximum displacement along the River f ault zone is approximately 600 feet (Reference 145). Underlying basement rocks are f aulted, wIth movement havIng begun eariy in the Paleczof c (Reference 81, Secti on 2.5 ). Latest movements along this are post-Pennsylvanian (310 MYBP) (Reference 165). i' The Rough Creek f ault zone begins west of the Cincinnati and extends across western Kentucky into southern iIIInois. This fault has an east-west trend i similar to that of the Kentucky River f ault zone. Near Shawneetown, Illinois, the Rough Creek f ault zone curves southwestward around Hicks dome and merges with the New Madrid f aulted zone (Reference 145). This f ault zone has a The nearest length of about 120 miles and a width of approximately 25 miles. point of this f ault zone to the site is about 120 miles to the northwest. 4 The Rough Creek f ault zone includes horsts, grabens, and en echelon normal i faults. These f aults also show some strike-slip movement (Ref erence 81, Section 2.5) The Rough Creek f ault zone has displacements up to 3000 feet (Ref erence 147). East of Shawneetown, Il1Inois, movement along this f ault zone was probably pre 0 Cretaceous (References 153 and 166). However, west of Shawneetown the portion of the Rough Creek f ault that curves southwestward has been postulated as being active since Pliocene (5 to 2 MYBP) and maybe into the Recent (Ref erence 147). i Both of these f ault zones are outside the Southern Valley and Ridge Tectonic l l Province and are 90 to 120 miles f rom the CRBRP site. Neither of the f aults af f acts the geologic or seismic design at the CRBRP site. 2.5.1.1.3 Physiographic, Lithologic, Stratigraphic and Structural Settings i Areas of similar lithology, stratigrcphy, structure and gecznorphic history are associated with physiographic provinces. The physiographic provinces within 200 miles of the CRBRP site include the interior Low Plateaus, Appalachlan Plateaus, Valley and R'dge, Blue Ridge, and Piedmont, as shown on Figure The lithologic and stratigraphic relationships are shown on the 2.5-1. Regional Geologic Map, Figure 2.5-3, which may be regarded as a bedrock map. 2.5.1.1.3.1 Valley and Ridge Physiographic Province The CRBRP Site is located in the southeast section of the Valley and Ridge Physiographic Province. This section of the Province is about 2.5-3a Amend. 69 May 1982

PIge - 6 [82-0320] /69 Scattered earthquakes occur in the Valley and Ridge and their " normal" focal depth is 50,000 to 65,000 feet, well within the busement rocks. On February 8,1%4, an earthquaka was reported by the U.S. Coast and Geodetic Survey southwest of the site with its epicenter in the Valley and Ridge at a focal depth of 15 kilometers - 49,000 feet (Ref.101). As shown in section '2.5.1.1.2, the tectonic structures in the Valley and Ridge terminate at a sole f ault which occurs at a depth of about 9000 feet. Obviously, earthquakes l which occur at depths of 40,000 feet below these shallow structures are in no way related to the structures. When plotted in relation to 6ach other, earthquake epicenters and the ancient, inactive f aults exposed at the surf ace within the Valley and Ridge Province are in no way related. l Since epicentral locations can not reasonably be correla+sd with tectonic structures, earthquakes are Identified with the tectonic province in which the site is located. This province has been designated as the Southern Valley and Ridge Tectonic Province by the NRC in their evaluation of the Sequoyah Nuclear Plant. The Province is bounded on the east by the western margin of the Piedmont Province; on the west by the western limits of the Cumberland Plateau; on the south by the overlap of the Gulf Coastal Plain Province; and on the north by re-entrant in the Valley and Rioge Province near Roanoke, Virginia (Ref.101). 2.5.2.7 Identification of Caoable Faults There is no geologic evidence of surf ace f aulting within the Valley and Ridge or adjacent geologic regions that is even remotely related to earthquakes that have occurred !n historic time. This is supported in Bonilla's review of Historic Surface Faulting in the Continental United States and Adlacent Parts of Mexico ( Ref.113). 1 It is concluded that there are no identifiable capable f aults that could be expected to produce surf ace displacement anywhere within the Southern Valley and Ridge Tectonic Province, within 200 miles of the site. 2.5.2.8 Descriotion of Canable Faults There is no evidence for any capable f aulting within 200 miles of the CRBRP site which may be of significance in establishing the Safe Shutdown Earthquake. 2.5.2.9 Maximum Earthouake The largest historic earthquake which has occurred in the Southern Valley and Ridge Tectonic Province was the May 31, 1897 earthquake in Giles County, Virginia, with a reported epicentral inten-2.5.-25 Amend. 69 May 1982

l Question C m 0.4 The Giles County Virginia earthquake of 1897 is the controlling earthquake for the seismic design of nuclear plants in the Southern Valley and Ridge tectonic province. The Clinch River Breeder Reactor is located in this province. Dr. G. A. Bollinger has been conducting research on the Giles County, Virginia seismic zone. He has recently written a report titled "The Giles County, VA Seismie Zone - Conf iguration and Hazard Assessment" which was presented at a conf erence (Earthquakes Engineering - Eastern United States, September 14-16, 1981) Based on the iocal seismic activity, Dr. BolIinger impiles the existence of a buried f ault in the Giles County aree. He uses the largest extent of the seismic zone, taking into account errors in hypocenter location, in order to calculate a possible maximum earthquake of surf ace wave magnitude M, = 7 for th I s zone. Provide a discussion on any of fects this hypothests has on the fof Iowing wIth respect to the Clinch River Breeder Reactor. a) The potential of the 1897 earthquake being associated with this specif Ic geologic structure; b) The potential of an earthquake up to M = 7.0 located in Giles County, s and any far field ground motion ef fect (both peak valus and response spectrum) at the site f rom an M = 7.0 event located in Giles county. s c) The potential of similar seismogenic structures being located near the Clinch River site, and any of f acts at the site f ran earthquakes on these seismogenic structures. QCS230.4-1 Amend. 69 May 1982

~ " ~ " ' ' ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ " ~ " ~ ~ ~ ~ ~ ' ' ' ~ ~ ^ " ~ hy: 6 [82-0342 [ 5 8 ~ ~ ~ ~ ~ ~ i l

Response

Part a Both supporting and contradictory evidence exists for the hypothesis that the 1897 Giles County Virginia earthquake occurred in association with ttie seismogenic zone proposed by Dr. G. A. Bollinger. The following f actors lend credence to the hypothesis that the May 31, 1897 Giles County, Virginia earthquake was associated with the seismic zone proposed by Bollinger (1981):

1) The proposed seismogenic zone is centered on Pearlsburg, Virginia, the locality with highest reported Intensity ef fects from the 1897 l

earthquake. (Law Engineering Testing Company in conjunction with Burns and Roe, Inc.1975 (ref. QCS230.4-2); Bollinger and Hooper,1971 (ref. QCS230.4-3)).

2) The magnitude of the 1897 event has been estimated as 5.8mb; 5.8 Ms I

(Nutti l et al., ref.QCS230.4-4; Bol l inger 1981, ref. QCS230.4-1). The estimate of the maximum pgssible f ault plane for the proposed seIsmogentc zone Is 80 km ) Is constdered by BoliInger (1981 ref. 2 QCS230.4-1 ). The smaller estimate (80 km ) is considered by Bollinger (1981 ref. QCS230.4-1) as capable of producing a maximum earthquake of magnitude 6.0 Ms, an event approximately equivalent to the 1897 shock. Although the location of maximum Intensity ef fects and modern estimates of the magnitude of the 1897 event are compatible with an assumed association with the proposed seismogenic zone, it is to be noted that Pearlsburg was the largest popule%n center of the Giles County, Virginia area and, therefore, I the possibility of some bias in the reporting of Intensity ef fects for the 1897 event exi sts. In addition, not all Instrumentally located earthquakes in the Giles County area show close spatial association with the proposed seismogenic zone. The most notable of the apparently non-associated earthquake is the second largest shock reported to have occurred in the Giles the magnitude 4.6 m November 20,1%9 Elgood, West Virginia I County area: The epicenter for the Elgbo,d, West Virginia shock was approximately 20 event. km northwest of the proposed seismogenic zone. An opinion has been expressed in response to parts (b) and (c) of this question regarding potential Impact of the specific geologic structure suggested by Bollinger on the CRBRP site. QCS230.4-2 Amend. 69 May 1982

' ~ ~ ~ ~ ~ ~ " ~ ~ ~ ~ ~ ~ - ~ ~ ~ ~ ~ - - - - - - - - - - - - ~~ ~ jage -'7 [82-0342] #68 Parts (b) and (c) i The responses to these two parts of the question are included in Ref erence QC3230.4-5 transmitted herewith as Attachment A. Summary responses are presented below. Summary of Response to Part (b) - Two approaches have been used to estimate ground motion at the site from an Ms=7.0 earthquake on the Giles county, Virginia seismogenic zone. The first approach, based on results by Nuttil (ref. QCS230.4-4), Indicctes a peak acceleration of 0.010g and a site intensity of V M or less. The second approach, which utilizes the specific intensity attentuation data and source characteristics for the Gildes County zone developed by Bollinger (ref. QCS230.4-1 ), Indicates a site Intensity of VI M and a corresponding peak horizontal acceleraton of 0.036g. The two approachos give results which are In good agreement considering that they are based upon two dif ferent physical phenomena, i.e, the attenuation of peak acceleration and Modified Mercalli intensity, respectively. As noted above, the Modified Mercalli Intensity associated with the peak horizontal ground acceleration considered possible at the site (0.036 ) is VI 9 j M. Present CRBRP design assumes a site Intensity of Vill M. Thus, the proposed maximum earthquake proposed by Bollinger for the Giles county seismogenic zone does not imply the need for a higher design intensity. l i J 4 4 I QCS230.4-3 Amend. 69 May 1982

Page - 8 [82-0342] #68 ~~' - ' - ' ~ Regarding the subject of response spectra, which is not addressed in Reference (QCS230.4-5), response spectra as presented in Regulatory Guide 1.60 have been used in the design of saf ety-related structures. Since the peak acceleration at the site associated with the maximum hypothetical Giles County event (0.036g) is less than that assumed for the Saf e shutdown Earthquake (0.25g), and the CRBRP response spectra mnsiders a broad f requency band, there is no impact to the (RBRP f ran the Giles County event. Summary of Response to Part (c) - An examination of the distribution of historical seismicity in the CRBRP site area did not reveal any discernible spatial trend suggestive of a seismogenic zone similar to that proposed by Bollinger (Ref. QCS230.4-1) for GIIes County, Virginia. In addition, inferred basement structures apparent on published magnetic and gravity anomaly maps of the area appear non-seismogenic. The single existing earthquake focal mechanism investigation in the area is Inconclusive, due to sparcity of data. The computed solutions only Indicate that a northeast striking basement f ault cannot be ruled out as the actual f ault plane of the November 30, 1973 MaryvilIe earthquake. Other equally likely solutions were obtained from the same data set. From en examination of available information, it is concluded that there is no evidence f or the existence of a seismogenic structure in the site area similar to that proposed by Bollinger (ref. QCS230.4-1) for Giles County, Virginia. l l QCS230.4-4 Amend. 69 May 1982

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~ ~~--- ----- - - ~ ' Pige - 9 [82-0342] d6'8 References QCS230.4-1 Bollinger, G. A.,1981, The Giles County, Virginia, seismogenic zone-configuration and hazard assessments in Earthquakes and Earthquake Engineering in the Eastern United States, J. E. Bevers, ed., Vol. 1, Ann Arbor Science Publishers, Inc., Ann Arbor, Nichigan, p. 277-308. QCS230.4-2 Law Engineering Testing Company in conjunction with Burns and Roe, Inc.,1975, Report on evaluation of Intensity of Giles County, Virginia earthquake of May 31, 1897. QCS230.4-3 Bollinger, G. A., and M.G. Hopper,1971, Virginia's two largest earthquakes - December 22, 1875 and May 31, 1897, Bull. Seism. Soc. Am., Vol. 61, pp. 1033-1039. QCS230.4-4 Nutti I, O.W., G. A.Bol i Inger and D.W. Grlf f Iths,1979, On the relations between modified Mercalli intensity and body-wave magnitude, Bul l. Sei sm. Soc. Am., Vol. 69, pp. 893-909. QCS230.4-5 Law Engineering Testing Company Final Report: " Review and Assessment of Recent Findings Concerning the Seismicity of Giles County, Virginia" prepared for Burns and Roe, Inc., dated May 17,1982. QCS230.4-5 Amend. 69 May 1982

Y e, ' erwce, G c5 G3d9-S I FINAL REPORT OF REVIEW AND ASSESSMENT OF RECENT FINDINGS CONCER'NING THE SEISMICITY OF GILES COUNTY, VIRGINIA i PREPARED FOR BURNS AND ROE, INC. 800 KINDERKAMACK ROAD ORADELL, NEW JERSSY 07649 BY t' LAW ENGINEERING TESTING COMPANY 2749 DELK ROAD, S.E. MARIETTA, GA 30067 MAY 17, 1982 eo we_m- ______.1____.__ ^

TABLE OF CONTENTS PAGE l.0 INTRODUCTION 1

~' 2.0 RECENT FINDINGS CONCERNING THE GILES COUNTY SEISMOGENIC ZONE 2 2.1 Review 2 2.2 Discussion 4 2.2.1 Evidence for the Seismogenic Zone 4 2.2.2 Evidence for a Fault or Fault Zone 5 2.2.3 Estimation of Maximum Magnitude Event 7 s 2.2.4 Types of Faults Potentially Responsible i i for the seismogenic Zone 9 3.0 SITE GROUND MOTION 11 3.1 Methodology 11 14 3.2 Summary i 4.0 EARTHQUAKE POTENTIAL OF SITE AREA 16 4.1 Historic Seismicity 16 4.2 Inferred Basement Structures 17 20 4.3 Summary 21 5.0

SUMMARY

AND CONCLUSIONS [ FIGURES TABLES i i I I SEISMICITY REFERENCES REFERENCES CITED i e l I . - = .. ~ - ~ ~ ~ ~ ~

'm LIST OF FIGURES TITLE FIGURE NUMBER Instrumental Epicenter Locations 8-2-1 of Earthquakes in the Giles County b Area i' Epicenter Locations with Error 2-2 Ellipsoids Earthquake Hypocenters Parallel 2-3 to Seismogenic Zone Earthquake Hypocenters Perpendi-2-4 cular to Seismogenic Zone Fault Plane Areas Inferred from 2-5 Hypocenter Locations Sustained Maximum Horizontal 3-1 Acceleration Versus Epicentral Distance for the Central United States 3 Hypothetical Isoseismal Map for 3-2 IX MM Maximum Earthquake (50% Fractile) Hypothetical Isoseismal Map for 3-3 IX MM Maximum Earthquake (70% s Fractile) Historical Earthquakes in Eastern 4-1 Tennessee Earthquakes in Eastern Tennessee 4-2 with Locational Uncertainties I less than 0.5 Degrees 1 I e

I ~ 1.0 Introduction This report reviews some recent findings concerning the seismicity of the Giles County, Viriginia area, and assesses f the implications of these findings in regard to seismic, design for the Clinch River Breeder Reactor Project. t The report incorporates information obtained as the result I, of an August 26, 1981 meeting with Dr. G. A. Bollinger, held to discuss some recently published results of his work in the Persons in attendance at this Giles County, Virginia area. j C. Chapman and L. T. Long of Law Engineering meeting were M. C. Macken of Burns and Roe, Inc., and J. M. ~ Testing Company, R. Siegel of the Project Office. Section 2.0 of the report reviews and discusses the technical assumptions and methodology used by Dr. Bollinger to estimate the maximum magnitude earthquake for the proposed Giles County, In Section 3, ground motions at the Virginia seismogenic zone. CRBRP site are estimated, assuming the occurrence of the esti-In Section 4, mated maximum earthquake on the seismogenic zone. the earthquake potential of the site area is assessed, in light of the recent findings in Giles County. the Nuclear Subsequent to the preparation of this report, Regulatory Commission requested the Project Office to provide a 1 series of discussions relating to the potential impact of Dr. Bollinger's work on the CRSRP (question 230.4). The contents of this report serve to respond to parts b and c of that question. ,4 .g.,

Recent Findings Concerning the Giles County, Virginia ~ 2.0 Seismogenic Zone. P This section contains a review of the methodology and results presented by Bollinger (1981) in his recent study of l seismic hazard associated with the Giles County, Virginia j-seismogenic zone. The technical content of the study and the ~ usefulness of the results will be discussed.in the context of engineering seismic hazard assessment for the CRBRP site. l 2.1 Review Recently, Bollinger and Wheeler (1980); Bollinger (1981) reported the existence of a tabular zone of seismic activity in the Giles County, Virginia area. This seismogenic zone has a near vertical dip, a horizontal length strikes N 36 E, of 40 km, vertical depth from 5 to 25 km and horizontal width This tabular zone is defined by the hypocentral 10 km. locations of earthquakes in the area. The data consist of 8 (1977) recent microearthquakes detected by a recently installed seismic network and by 4 larger pre-1977 felt events, which have recently been relocated. The orientation and dimension of the Giles County seis-mogenic zone was determined from the statistical accuracy i of the computed hypocentral locations. Specifically, the computational procedure used to locate the earthquakes definas an ellipsoid, within which the hypocenter is located at a In the case of the 8 micro-particular confidence level. , i

v

= - - - - -, - - _ _ - _

6 J earthquakes, this confidence level is 68%. For the pre-1977 1 " events, the confidence level is 90%. The dimensions of the zone are estimated by moving the computed hypocenters inside their error ellipsoids to achieve maximum and minimum spatial i dispersals. Figures 2-1 and 2-2, taken from Bollinger (1981), show the epi' central locations of the earthquakes. The seis-mogenic zone is represented by the northeasterly trend of epi-i' centers centered near Pearisburg, Virginia. Figures 2-3 and ( 2-4 show the vertical distribution of hypocenters parallel and perpendicular, respectively, to the northeast trending As in Figure 2-2, the lines from the earthquake locations zone. represent the axes of the error ellipsoids. Under the assumptio'n that the hypocenters define a single fault plane, the fault plane area is estimated by arbitrarily moving the hypocenters toward or away from their centroid. This is illustrated in Figure 2.5. This results in a range of 2 I fault plane area of 80 to 800 km, Bollinger (1981) estimates the maximum magnitude of earth-k quakes associated with this seismogenic zone'by assuming that 2 the 80 km2 and 800 km values also represent the range of maximum potential rupture area. He invokes empirically deter-mined relationships between fault rupture area and earthquake magnitude. This resulcs in a range of possible maximum 2 earthquake magnitudes. The 80 km estimate of maximum rupture area is assumed capable of producing an earthquake with -_ -

I t f. surface wave magnitude (Ms) 6.0. The larger estimate of maximum rupture area, 800 km, would produce Ms = 7.0. Bollinger (1981) adopts the value Ms = 7.0 as the largest possible earthquake for the G.les County.seismogenic zone. r' i 2.2 Discussion Bollinger (1981) presents a methodology for estimating the seismic hazard of the Giles County seismogenic zone. The study does not attempt to quantitatively estimate ground motion nor does it assess the likelihood of occurrence of the maximum magnitude event. Thus, it cannot be directly used to establish engineering seismic design criteria. However, the major result of the study is a useful estimate of the I 1 maximum expectable magnitude earthquake for a specific area in the eastern United States. In addition, hypothetical isoseismal j' maps are developed which can be readily incorporated in the er.gineering seismic hazard assessment procedure. These results can be incorporated in future quantitative seismic hazard studies for specific sites in the region. Because of the importance of this study, the technical assumptions and methods used deserve attention. Evidence for the Seismogenic Zone 2.2.1 The seismogenic zone is defined by an alignment of earthquakes, historic and otherwise. These earthquakes

represent a range in magnitude of four units (0<M<4) and two decades in time (1959-1980). Thus, the zone is defined not only c i i ~ on the basis of an alignment of 8 microearthquakes, but also by four events which were felt in the area. During the August 26, 1981 meeting, Dr. Bollinger noted s I that additional evidence is actively being sought to further dafine the nature of the seismogenic zone. In addition to continued earthquake monitoring, other lines of evidence might include seismic reflection profiles, gravity and magnetic sur-k, veys, detailed surface mapping and drilling. l 2.2.2 Evidence for a Fault or Fault Zone f From the distribution of earthquake hypocenters which define the tabular seismogenic zone, Bollinger (1981) infers ~ the existence of a single fault plane in order to estimate the magnitude of the maximum possible earthquake associated with the zone. As noted by Bollinger during the August 26, 1981 meeting, this inference would be strengthened by the exis-q.. I tence, orientation and slip on one or more faults defined from geophysical data, especially seismic reflection profiles. ~ Bollinger and Wheeler (1981) report that focal mechanism t solutions for Giles County events to date have proved to be inconclusive. Although the evidence for mode of faulting is mixed, a predominantly dip-slip type of motion is favored for the events in the seismogenic zone. Additional data of this type will help establish whether these events occur on i ~-

one or more faults, and will also establish the directions of I I' principal stress. f' It is important to note that not all historical earth-i quakes in the Giles County area have occurred within,the seismogenic zone. This may imply the existence of multiple faults in the area.- The most notable example is the second L largest historical event, the 1969 21 good, West Virginia shock, i which occurred some 20 km to the northwest of the zone (Bol-linger and Wheeler,1981). The largest historical shock, which f, occurred on May 31, 1897 is assumed, but cannot be proven, to have originated in the zone (Bollinger,19 81). Evidence for this is based upon reports that the highest intensities were reached in Pearisburg, Virginia, which is centrally located on the inferred seismogenic zone. However, Pearisburg is also the largest population center in the area, so the possibility of population bias in reporting of intensity does exist. The May 31, 1897 event is the largest historic earthquake tihich has occurred in the Southern Valley and Ridge Tectonic Province,. with a reported epicentral intensity of VII-VIII MM (Langer and Bollinger, 1971). A subsequent re-assessment of the intensity was performed by Law Engineering Testing Company in conjunction with Burns and Roe, Inc., which confirmed the VII-VIII intensity t I l value of the earthquake (Law Engineering in conjunction with L Burns and Roe, Inc., 1975). However, in conformance with Nuclear Regulatory Commission directicn, an intensity rating of VIII MM was used in CRBRP design. l - - -..

1 2.2.3 Estimation of Maximum Magnitude Event 1) Bollinger (1981) estimates the maximum magnitude earth-quake for the Giles County zone by invoking published relation-ships between fault rupture area and earthquake magn'itude. t In applying these.relationsb*.ps to the Giles County zone, the I following assumptions are made: t. (1) Earthquakes in the Giles County zone occur on a .~ 1 i single fault plane.- (2) The maximum potential rupture area on this fault l. plane, and hence, the maximum magnitude earthquake, [ is defined by the spatial distribution of earthquakes. (3) The published relationships between fault rupture area and magnitude are valid for the Giles County zone. The first assumption has been discussed in the preceeding section. Regarding the second assumption, the traditional method for estimating earthquake magnitude has been to utilize i correlations between surface rupture length (which may represent the entire known length of the fault) and earthquake magnitude. Wyss (1980) has recently noted that practical difficulties arise in the development and use of such correlations. For example, difficulty arises in judging whether a future earth-quake could rupture the entire geological mapped fault, a + fraction of it, or a multiple of it (this latter situation could arise in the case of a partly concealed fault).

Also, it is important to recognize that surface rupture length may be less than the total source rupture length at depth.

If the ~ I correlation involves the entire mapped fault, it should be U recognized that the surface trace may be the result of many r ruptures occurring over geologic time. To obviate some of l these ambiguities, Wyss (1979) proposed that the source rupture I area be used in the correlation instead of mapped fault length I or surf ace rupture length. In establishing the maximum mag-nitude event, Wyss (1980) advocates the following general practice. First, the extent of the active fault (s) are identified by geologic and microseismic mapping. Then, on the basis of the segmentation of cuch fault (s), historic seismicity and geomorphic features, one must decide whether an earthquake could rupture the entire fault or only a portion of it.

Then, using the available information, the size of the maximum rup-f t-ture area is estimated and the maximum magnitude is deter-mined from the physical relation between rupture area and magnitude, f

In estimating the maximum earthquake for the Giles County i zone, Bollinger (19 81) has followed the above procedure and i i i has postulated, for a worst case situation, that the entire mapped fault plane could rupture. i Regarding the third assumption, Nuttli (19 81) has pointed out that for a given surface wave (Ms) magnitude, large (M>6) mid-plate and plate margin earthquakes may have very different [ seismic moments. A consequence of this is that events in mid-l plate regions such as the eastern United States may have larger l l magnitudes than events in plate margin regions such as California, T Tr.

[ given the same rupture area. For example, Singh, et al. (1980) i presented theoretically derived relations which suggest that for i a given rupture area, the surface wave magnitude of a mid- { plate earthquake may exceed that of a plate margin earthquake i by about 0.5 units. I Because the available data used to establish empirical relations between rupture area and magnitude come almost ex- [ clusively from plate margin earthquakes, the validity of such relationships in mid-plate areas is debatable. 2.2.4 Types of Fault Potentially Responsible for the Geismogenic [ Zone Bollinger and Wheeler (1981) note that the Giles' County seismogenlc zone involves the upper half of the crust, beneath the Valley and Ridge thrust sheets, and that data is not now publicly available with which to identify clearly such deep structures. However, Bollinger and Wheeler (1981) consider the geologic history and existing information for the Giles County locale in an attempt to constrain the probable type, age and motion of the seismogenic structure, as well as the i ' f geographic area within which there may occur. analogous l l structures with similar potential for seismic hazard. ( Bollinger and Wheeler (1981) consider three types of basement faults as potentially responsible for the Giles l l Couny zone. The existence of these faults in the Giles l i County area is as yet hypothetical. However, of the three potential types, the type considered most likely to be the l i l

causal fault of the Giles County zone is a hypothetical base-ment fault of early Paleozoic or Precambrian age, reactivated s by the modern stress field. Bollinger and Wheeler (1981) propose thst these faults occurred as a result of the opening s, of the Paleozoic Iapetan ocean, which separated the Eurasian ( ~ Paleozoic and North American cratons. Such Precambrian and age faults may have formed as a result of extensional stress along the, North American cratonic edge. Bollinger and Wheeler (1981) suggest that the eastern boundary of the cratonic edge and thus, the eastern limit for the area in which Iapetan f normal faults are to be expected to occur is marked in general by the gradient in the non-filtered Bouguer gravity anomaly field. Citing examples from other passive plate margin areas, they propose that the western limit of expected Iapetan normal faults lies 100 to 200 km to the west of the gravity gradient. In general, this gravity gradient follows the eastern margin of the Blue Ridge physiographic province in Virginia, and from North Carolina southwestward into Alabama, follows the Brevard zone. } In regards to the CRBRP site, it is to be noted that the entire Valley and Ridge geologic province of the Southern Appalachians lies less than 200 km to the west of the gravity gradient, and thus lies above the cratonic edge within which Bollinger and Wheeler (1981) postulate the possible existence of Iapetan normal faults.

l 3.0 Site Ground Motion The effect of the Giles County seismogenic zone on I - seismic hazard at the CRBRP site was assessed by estimating the expected ground motion at the cite due to an intensity i. IX MM (Ms 7.0) earthquake occorring on the zone. 3.1 Methodology i Two approaches were used to estimate ground motion. For one approach, the recent work of Nuttli (1979) was used to estimate directly the peak ground acceleration at the site, without recourse to intensity data. The.second approach utilizes the isoseismal maps developed by Bollinger (1981) I which were specifically developed to include the source characteristics of the pcstulated magnitude 7.0 (Ms) Giles I 1' County earthquake, and regional attenuation properties of the Appalachian highlands. Nutt11 (1979) has evaluated the existing United States I strong motion data and has derived curves showing the attenuation of acceleration as a function of magnitude and epicentral distance. Using, theoretical results and observations of central United States earthquakes, Nuttli (1979; 1981) has specified regionally dependent scaling laws which allow strong motion data obtained in the Western United States to be reliably utilized in other regions. Figure 3-1 shows the latest results (Nuttli, 1981) for the central United States. It should be noted that these curves incorporate minor modifications n.ade subsequent to publication by Nuttli (1979). l 11-1 ,w-- -e, w y

~- The curves are expressed in terms of " sustained horizontal i n acceleration" and body wave magnitude (rdo) rather than as l [ (Ms). peak horizontal acceleration and surface wave magnitude Nuttli (1979) gives the following formula for conversion b i of Ms to mb: r mb = 0.61 Ms + 1.93 Thus, the proposed magnitude Ms = 7.0 Giles County event I Nuttli would exhibit body wave magnitude mb of about 6.2. ( ~ determined the ratio of sustained horizontal acceleration (1979) { His estimate of this ratio to peak horizontal acceleration. ( derived from 367 strong motion records. is 0.700 + 0.152, Using the above conversions, peak horizontal acceleration for the site, located 360 km from the assumed epicenter, can The value is 0.010 g. be determined directly from Figure 3-1. In addition, Bollinger (1981) assumes that the Ms = 7.0 earthquake corresponds to mb = 6.4. Using this value and the procedure outlined above, Figure 3-1 ardicatas a peak horizontal site acceleration of 0.014 g. The above values can be converted to Modified Mercalli intensity, using results developed by Nuttli (1979). Because I .of the large epicentral distance (360 km), we assume that high As pointed frequency motions will be substantially attenuated. the correlation between intensity and out by Nuttli (1979), There is a tendency acceleration is frequency dependent. for acceleration to decrease as wave frequency decreases large epicentral distances, for a given MM intensity. Thus, at relatively small accelerations may correspond to relatively If we conservatively assume that peak high intensities. '

= I f' accelerations occur at frequencies less than 2 Hz, the results of Nuttli (1979) indicate that 0.010 g peak horizontal acceleration corresponds to intensity V MM or less.' ( The second approach to estimating the ground motion at the site utilizes the hypothetical isoseismal maps developed by Bollinger (1981). These maps are' reproduced as Figures '~ 3-2 and 3-3. Figure 3-2 is representative of hypothetical intensity data contoured at the 50% fractile, whereas the i (, isoseismals of Figure 3-3 are anticipated to envelope 70% or more of the individual observations. The distinction between these two maps is important. In Figure 3-2 the site is located upon th'e intensi.ty VI MM isoseismal. This means that it lies very near to the mean distance at which observations of VI MM will hypothetically be reported. This does not mean, however, that higher inten-sities cannot occur at this distance. This is illustrated by l Figure 3-3, unich incorporates an added degree of conservatism, by contouring the hypothetical data at the 70% fractile. In a statistical sense, the two maps represent the effect of un-certainty in the intensity-distance relationships. For our i second approach, we choose the "most likely" or 50% fractile map (Figure 3-2) which indicates a site intensity of VI MM. Because it represents the 50% fractile, this map is compatable with mean-centered attenuation functions, such as Nuttli (1979). t k

~~ s = - _ I + To convert intensity VI MM to site acceleration, we once again assume that the peak acceleration will occur at fre-F quencies of 2 Hz or less, and invoke the results of Nuttli (1979). The resulting mean value for peak horizontal acceler-ation is 0.036 g. ] In contrast to the procedures used above, the site design acceleration was determined by utilizing a relationship be-tween site intensity (assuming site Intensity VIII MM) and peak horizontal acceleration based on period-acceleration graphs I -- published by Neumann (1954). For comparison with the above - results, the Neumann (1954) relation for site intensity VI gives a peak horizontal acceleration of 0.065 g. A similar value of ~ 0.066 g may be reached by using the Trifunac and Brady (1975) intensity-acceleration relationship. 3.2 Summary We have used two approaches to estimate ground motion at the site from a Ms 7.0 earthquake on the Giles County, Virginia seismogenic zone. I The first approach, based on results by Nuttli (1979), indicates a peak acceleration of 0.010 g and a site intensity of V MM or less. The second approach, which utilizes the specific intensity attenuation data and source characteristics i for the Giles County zone developed by Bollinger (1981), indi-cates a site intensity of VI MM and a corresponding peak horizontal acceleration of 0.036 g. . 4 6 m,. c-,,-.--.---s----,_ w e ,y y

._m... ,,( 'Q I The two approaches give results which are in good agree-e ment considering that; they are based upon two dif ferent physi-g r , cal phencuena: 1.e., the attenuation of peak acceleration i. and Modified Mercalli intensity, respectively. t -- t i g F I e ) l i e IL I I {_ F, 4 l i a 3 a - 1 ] 1 1 ,,,e_._..,_ ,'m- ._r..

4.0 Earthquake Potential of Site Area This,section. details the historic seismicity of eastern Tennessee in the vicinity of the site. In view of the recent I ' findings in Giles County, Virginia (Bollinger, 1981; Bollinger i s and Wheeler,1981), the spatial distribution of earthquakes P* was carefully examined to determine if any linear trends suggestive of seismogenic zones similiar to that postulated by Bollinger (1981) are discernable in the site area. In addition, published information concerning basement structure I was reviewed, and inferred basement lineations were examined for possible correlation with historic seismicity. 4.1 Historic Seismicity Table 1 lists 67 earthquakes occurring in that portion ~ 0 0 of Tennessee between longitude 83 and 85 W. This list was c.ompiled largely from S,eismicity Map _of Tennessee (Stover et al., 1979). Original source references used by Stover et a'.. (1979) are noted in Table 1 and are listed in this i report under " Seismicity References". The epicentral locations of the 67 historic earthquakes are shown on Figure 4-1. On Figure 4-1, the intensities and dates of occurrence refer to the largest event reported at a particular location. Figure 4-1 indicates that 22 of the 67 Bollin-earthquakes have been attributed to the Knoxville area. ger et al. (1976) noted that this apparent concentration of seismicity near Knoxville may result from population bias in,

A the reports of pre-instrumental events. Only during the past decade has instrumental location capability approached adequacy in the region. Stover et al. (1979) have estimated the locational uncertainty of each of the events shown in i Figure 4-1. For the majority cf these events, the uncertainty is greater than t 0.5 degrees. Figure 4-2 plots 26 earthquakes which have an estimated locational uncertainty of less than 1 0.5 degrees. Of immediate interest is the fact that 11 of these 26 earthquakes occurred i in the Maryville area. However, of these 11 events, 8 were reported foreshocks or aftershocks of the intensity VI MM Nbvember 30, 1973 Maryville earthquake (Bollinger et al.,1976). Taking this into consideration, Figure 4-2 indicates that epicenters of well located events in the area form no discern-ible spatial pattern. However, it should be recognized that the region has been adequately monitored for only the past 10 to 15 years. As a result, unequivocal conclusions as to the existence or non-existence of spatial trends in seismicity cannot be made at this time. I 4.2 Inferred Basement structures The Giles County, Virginia seismogenic zone is attributed to faults within the basement and is presumably not evident in the surface geological structure (Bollinger and Wheeler, 1981). Thus, published interpretations of magnetic and gravity data covering eastern Tennessee were reviewed and compared with the spatial distribution of historic earthquakes. _ _ _.

r-- Wstkins (1964) reported the existence of a pronounced northeast trending magnetic and gravity lineation paralleling the western margin of the Valley and Ridge province in eastern Tennessee. ,More recently, King and Zietz (1978) noted that [ this lineament is part of a much larger feature which can be traced on magnetic and Bouguer gravity maps from Alabama to New York. Watkins (1964) interpreted this lineament as marking a discontinuity beneath the sedimentary section, and I suggested that the feature is seismically active, noting that i several historic earthquakes have occurred within about 15 miles of the axis of the lineament (Figure 4-1).

However, King and Zietz (1978) do not imply that the feature is seismically active: on the contrary, they propose that it marks a basement discontinuity separating a seismically active crustal block on the southeast from a seismically in-active crustal block on the northwest.

This is substantiated by Figure 4-2, which plots those earthquakes reliably located in eastern Tennessee. It is important to recognize that the i I Bice Ridge province of western North Carolina exhibits a level of seismicity similar to that of eastern Tennessee. In addition, further to the northeast in West Virginia, the lineament passes through an essentially aseismic area. In accordance with King and Zietz (1978) we conclude that the lineament is not a seismogenic structure, but may in fact represent the western boundary of a seismically active region lying to the southeast.. ~mmm. m

l The November 30, 1973 Maryville earthquake is one of the r few southeastern United States earthquakes for which focal mechan-ism solutions are available. Unfortunately the data are sparce and as a result, the focal mechanism is inconclusive. For the main ' shock, Bollinger et al. (1976) obtained two equally likely solu-f t. tions, one showing normal faulting on northeast or northwest striking nodal planes, the other defining reverse faulting with nodal planes striking northwest. Bollinger et al. (1976) favored the reverse faulting solution on a northwest striking fault plane based on other data (aftershock epicenters, vertical distribution of aftershock hypocenters and regional in-situ stress measurements). Her mann (1979) obtained a strike-slip mechanism wi'th nodal planes striking either north-northeast or west-northwest, with steep dips. Both investigators noted that their solutions were poorly constrained. However, both studies indicate the poss-ibility of a northeast striking fault plane, which Bcllinger I-and Wheeler (1981) cite as supporting evidence for seismi-cally active, northeast striking basement faults in the same I geologic-physiographic province as the Giles County, Virginia zone. ! l

4.3 Summary An examination of the distribution of historical seismi-e city in the site area does not reveal any discernible spatial trend suggestive of a seismogenic zone similar to that pro-posed by Bollinger (19 81) for Giles County, Virginia. In p addition, inferred basement structures apparent on published magnetic and gravity anomaly maps of the area appear non-seis-mogenic. The single existing earthquake focal mechanism inves-tigation in the area is inconclusive, due to sparcity of data. The computed solutions only indicate that a northeast striking basement fault cannot be ruled out as the actual fault plane of the November 30, 1973 Maryville earthquake. Other equally likely solutions were obtained from the same data set. From an examination of available information, we conclude that there is no evidence for the existence of a seismogenic {, structure in the site area similar tc that proposed by Bollinger (1981) for Giles County, Virginia. However, the quality of the available data is such that the existence of such a structure cannot be definitely ruled out. In order to conclusively assess the likelihood of such a structure in the site area, a program of microseismic monitoring would be required. l l i i l l

5.0 Summary and Conclusions The study by Bollinger (1981) represents the first instance f in the eastern United States where a seismogenic zone and associ-ated maximum earthquake has been defined on the basis of observed l earthquake activity, except for a few reservoir induced seismicity 7. studies. The methods used by Bollinger (1981) to estimate the maximum possible earthquake are accepted as valid by the seismo-logical community. Application of these methods is fundamental to the practical problem of assessing seismic hazard in regions where capable faults are observed. In the eastern United States, this is a novel approach primarily because of the general low level of seismicity and the absence of obvious capable faults at t the ground surface. l The estimate of the maximum earthquake for the Giles County seismogenic zone incorporates the statistical uncertainty of the observational data. This results in a range of magnitude: 6.0 < Ms < 7.C. For a worst case situation, Bollinger (.1981) adopts j the upper limit of this range (Ms 7.0) as the maximum magnitude. This corresponds to an epicentral intensity of IX MM.

Ideally, a probabilistic assessment of seismic hazard posed by the Giles County zone would incorporate a mean value of the maximum magni-tude, with associated statistical uncertainty, and an estimate of the probability of occurrence.

As pointed out by Dr. Bollinger during the August 26, 1981 meeting, these elements would require additional study. Potential ground motion at the CRBRP site due to occurrence of an Ms 7.0 event on ~ the Giles County zone has been estimated using recently developed results. The peak horizontal ground ccceleration expected at the site is 0.036 g: This corresponds to Modified Mercalli intensity VI. Present CRBRP design assumes a site intensity of VIII MM. Thus, the proposed maximum earth-quake for the Giles County seismogenic zone does not imply the need for a higher design intensity. It has been hypothetically proposed that faults similar I to those considered potentially responsible for the Giles County ~ zone may exist elsewhere in the basement of the Southern Valley and i Ridge Tectonic Province. Proven existence of any seismogenic structures potentially capable of generating site intensities exceeding VIII MM could require upgrading the design intensity. We have addressed this problem by assuming that the critical I' seismogenic structure would exhibit characteristics similar to those of the Giles County seismogenic zone. Thus, this hypothe-tical feature might be a seismically active, northeast trending basement fault located in eastern Tennessee. Our investigation of the distribution of historic epicenters and inferred basement features in eastern Tennessee sh'ows no evidence for the existence of such a structure. Therefore, we conclude that a site intensity of VIII MM, which is being used for the CRBRP design as directed by NRC, will not be impacted by the Bollinger (19 81) Giles County seismic hazard study. --,.<----,-,v ,,~m,,,.~r ---.---s +,

We feel that in areas influenced by the Giles County, Virginia seismogenic zone, the derivation of the vibratory ground motion design could be affected. To date, there is no evidence indicating the existence of a similar structure elsewhere in the Southern Valley and Ridge Tectonic Province. It concluded that f the siting evaluations arising from the existence of the Giles County zone for proposed facilities in these areas will require only that the intensity IX MM Giles County maximum event be ~ attenuated to the site in question. ? a l O e 4 e l l -- --

e o. j N o, O O NAV O. 10 20 km e I MAGNITUDE O+* >4 O 3-4 i O 2-3 i O l-2 0 o <1 d._- T @3 A e BOLLINGER l o DEWEY B GORDON r l l I l LEGEND y micnos Antreous xes (BoLLINGEn, t $41) O s^arwouaxes av orway ano conoon titsel mooireso enou soLL1HaEn (1981) 1 -m_,,.___-_ "T^ LAW ENGINEERING TESTING CLINCH RIVER BREEDER _3 LOCATIONS OF E ARTHOU A.KES COMPANY IN THE GILES COUNTY AREA RE ACTOR PROJECT M A RIETT A. GCO Rat A I , JOB NO. MG1319 FIGUR E 2-1

~. ', ", ' so"co' a.* W s *es* scoo* eo.t* eo* w 40*4' > >.c > >.r .\\, i Henten \\ l 8/westone j /= *)

eserved g

7. / s ta,0~ ^ tre no - l i / / h / X X "*

j.

l ~ */ g* gPrinceton l uo,,o.Paoris 3 ['\\ ,,I.. g.. 2,9 7 . A i ) g Elve ls eid f p*' Blocksburg / l \\ R edf ord j h Christionmrg f ~ Putoshe ,=.,ma... _... A Ut C/dr'*' o i l.dle S F

oo i

~ 37*of ... no- ...er artxt . so.r so,o-so,y so.co-l l 4 1 a LEGEND e t A RT 41u AKE *.1C AT sa BY sO LL AJEn livas; o E AnTHOu AKE LOCATION SY DEWEY ANO GORDON (19 8al EPICENTER LOCATION ERROM ELLIPSClO AXES l MODIFIED PROM SOLLINGEN (19 8 tl l l l l m-l EPICENTER LOCATIONS WITH LAW ENGINEERING TESTING CRROR ELLIPSOIDS CLINCH RIVER BREECER COMPANY REACTOR PROJECT M A RIE TT A. G E O RGI A .O8 No. MG1319 FIGURE 2 2 ~ -. l l l ~ - ~ * * ~~ ' ' ~ ' ~ ~ ~ ~ ~ ^*7_**

1 i A' A NAV y swafoce 10 .:x - 3 x I E 20 8 30 - e BOLLINGER o 3 go i$ g, o CEwCY 8 GORDON C FOCAt. OEPTH FIXEO tiAv A' A y g g sve f ace O O 10 4* 2 M 5. ,$20 i o 3-< c - O 23 g e-C I-2 / o <t 30 80 LUNGER _A o OEwCY 8 CORDCN C FOCAL DEPTH Fl1CD o-LE G sEN D l E ARTMQU At(E M AGNITUDE O E ARTNQU AKE LOCATION SY WOLLINGER (198 9) o EARTNQU AME LOCATION BY DEWEV AND GORDON (1980) NYPOCENTER LOCATION ERROR ELLIPSOIO AXES MODIFtEO FROM SOLLINGER (1981) E ARTHQU AKE HYPOCENTERS CLINCH RIVER BREEDER LAW ENGINEERING TESTING PARALLEL TO SEISMOGENIC COMPANY RE ACTOR PROJECT ZONE M A RIETT A. G EO RG4 A JOB NO. MG1319 FIGUR E 2-3 se- _.u,_--_. -, ~ ~ ~. * ~ - --.~: ~ ~~ -.-? ~

S' 6' 8 NAV i B ,NAV 9-sustace surface y g ~- O 10 10 1 2 x x 20 20 e l i . iE 8 t .o g 30 '30 On _ o 34 8 O'23 ( 4o 4o _ O l-2 B' j l o <3 e DOLLINGER O S to 15km

BOLLINGER O CEwEY 8 CORDON o DEWEY & GORDON C FOCAt. DEPTH FlxEO C FOCAL DEPTH FlxED I

i LEGEND j Q EARTHQU AKE M AGNITUDE f' e E AnTNOui.KE _u a. On av sOLLisoEn (is sig o E AnTHQU AKE LOCATION Ev DEWEv AMD GORDON (iSee) i NyrOCENTEn t.CCATiON ERROR ELUPSoto AXES [ uCDer EO rnou sOLL NoEn (i.eij n._ EARTHQU AKE HYPOCENTERS ~ LAW ENGINEERING TESTING PERPENDICULAR TO CLINCH RIVER BREEDER -1 COMPANY SEISMOGENIC ZONE R E ACTOR PRO.*ECT M a mIE TT A. G E O nc e a FIG UR E 2-4 , JOB NO. MG1319 _ . _ _~_~ Y,1 ,._...__ _,,, _..,_i" ",%T?,, -., _ _.., -. -,..,, ~ ~ ~ ~ [

,., m. Aisw) y (NE)' A' NAV surface f 1 r,w M. ) Area = 80 km, iO 3 38 //'Vp 2 (Area = 250 km ) C $ 20 w o e '30 o s to is km-surface (NE) A' A(SW) y NAV

D I

\\*

apa, b1 s

10 2 5 O 'I --.[?.: O 2 Area = 800 km ~ , ~l a ~ , 'i! p. ' : ^ i ~ l 30 A/ e-m- LEGEND 0 =^aTaau^*="vaocrarca D HYPOCENTER E RRoR ELLIPSOID b uooiriEn Frow soLLincER ti ail m FAULT PLANE AREAS L ENGINEERING TESTING INFERRED FROM HYPOCENTER CLINCH RIVER BREEDER LOCATION REACTOR PROJECT u a nir Tr a. c co ncia ~ JCB NO. MG1319 FIGU RE 2-5 namm- -

=_.. _ _ 1000 s s s s -s s ~ N N CENTRAL UNITED STATES s s s s N s N N N N \\ \\ g L \\ W N 7.2 2 i .u,, Z 6.7 l 9 Q IOC * ~ g 6.2 j ,t: .J f w ~ ~ O 5.7 J 5.2 4 I-Z + o 5.0 N E 4.3 47 ~ 0 I 2 m b = 4.2 3 X 2 5.0 R 10 5 2 50 3 2 5.0 o w E, t; 3 U1 ,j4.5 l s 10 10 0 1000 EPICENTER AL DISTANCE (KM) wooiricQ FR OM MUTTU [9 979) m-- SUSTAINEO M AXIMUM CLINCH RIVER BREEDER 7 LAW ENGINEERING TESTING HORIZONTAL ACCELER ATION COMPANY VERSES EPICENTR AL DISTANCE RE ACTOR PRO.ECT FOR THE CENTRAL UNITED u a niert a, croncia STATES JOB NO. MG1319 FIGURE 3-1

I i

i.l R 2 O 3 F EK E P R A A U U M G Q I LH F A T )E MR 7 L SAI IE ET SM C O A U S R M F I LI '4 A X% 9. C A0 0 8 s 4 3 3 3 I M (5 1 3 T EM G 1 i HM M T OC O PD oo _yR N Y i T H B y O A J ), j y 5 7 x g. \\ s Y N o. s A i P - M*

c. '

O D a i M L .A G C X, N A c T I I V o. S N l E o i l T \\ ii 7 I '7, V G 9 N T IR e E E N v y.L w d I G c N p6& ./ s i E 1 W g T A n L J 1 v ~e ~ g' ~ -( p T 3 H 1 8 O m I V 6l I ) A I S j. S L G I ( R E E l l G T e. l N is a R / Y T ,\\ \\.g N t o E n DT vK V e E C N m o EE I n RJ ^ r B O 7 I o R 8 .s R P e E r R n V O I o RT s,s C H A C E N R IL C t, f 'i,i j t '. h l' l' f , j l!)

l f 1 i i i 1 87* 83* 79* 75* I}.l I) _I 40* 1 8 lj i 6 I OH _ _ I/# \\ MD i IN sh \\ t P '\\_ ,d 'W] q ^-K,) ,q}IX '{ g l y. v,- 'go9,gs-/, 38-g.v 3 KY z N [ 4A o VA o* l "3 \\ i g /. 111 o GE O TN \\/[] p 36* k b 'l vi C "E p o" O i SIT o - -. E.___ NC [ l T 34* SC ~ I GA 'g '\\. o. is.o km A AL y \\l l I I si i i l l uooerezo enou son.a.snoma lasest l H YPOTHETICAL ISOSEISMAL MAP FOR LAW ENGINEERING TESTING COMPANY IX MM MAXIMUM EARTHQUAKE I CLINCH RIVER DREEDER l RE ACTOR PRGJECT (70% FR ACTILE) u ARIETTA. GEonGen lj j JOB NO. MGl319 FIGURE 3-3

i r. _f KY. VA. TN. TN. / v l-

6..i

/ vg / ,v t sese y a , [ 3' s i 6.. '. r-l- g vie 1 6' J t 1983 av i y :- iv6..,' /. I 36' N / i...[* ve ses3s / KNOXVILLE vga v6' / iss.

SITE

' "/ V8 vg i.,!ja Vg' /,/ e .Cr

f f

on / o f / 6..., -'VA / V " V ' 4, /..v s a c= sai i ..s.v ' 'v f 6 d' 4

isr, iese j

.4 ses V .f..a i 6.' 1 I isgs l 3 5' N)'V as TN. j ~ s ve ~ ~~ ~ ~ ~ isso GA. f f l 85'W 84'W 83*W LEGEND 6 EPicENTn4L loc AFiOn 6: E A,a O uAntsnEPOnTEO V] MODIPIED MEnCALLI EPfCENTR AL INTENSITY ,,, AND D ATE OF LAnGE57 EV ENT AT GaVEN LOCATION CLINCH RIVER BREEDER LAW ENGINEERING TESTING HISTORIC EARTHCUAKCS IN REACTOR PROJECT .3 COMPANY E ASTERN TENNESSEE M ARIC 77 A. GEO NG6 A JOB NO. MG1319 FIGURE 41 i _-m-___ _m-- c - - - +, , -.,, _., _ _,,, _ -,,- -. = -,, - -= -, +- - - - - - - - - -,, - -. -, - - - - - - -. -, - -, -. -

~ ~l I VA. KY. j f TN .a.., / / V ' v / .f / ,v' ( \\ F ) 4 "A.. 8 l [ t i 3 'V/. f 36'N ,/, s. ' OKNOXVILi E y / '"' SITE i.. y v ./ "'6' ' 'O, / .S p f n / s son 4 J / / 4 / / 16- / / g' S.C* V / y, a /...! / f vsp ./ l ..O.., I i 3 5' N V 'n ' TN. / e._ G A. e .( 85*W i I i 83*W 8 4' W LEGEND 6 spiccurn AL Loc ATION o* "V""J ".'.o'c^4 Ti"P ^ "" " " { " O.. "n0o'Is'AT o'r"LAn's aN's0"E"D 'GiIr's"n70c ATtON ^ i. EARTHQUAKES IN EASTERN LAW ENGINEERING TESTING TENNESSEE WITH LOCATION AL CLINCH RIVER BREEDER COMPANY UNCERTAINTIES LESS TH AN REACTOR PROJECT 0.5 D E G R E E M A RIsTT A. GzO RGI A J O B N O.M G.m.9 FIGURE 4-2 __.., 1 31 i - -- -rv. - t ( -w-w=

TABLE 1 continued: (Page 3 of 3) YEAR /MO./ DAY TIME (EST) LAT. LONG. Io/M REF. i 1969/7/13 16:51:09.4 36.1 83.7 V/4.1 16 1969/7/14 05:13:14.5 36.1 83.7 II 5 1969/7/14 06:15 36.0 84.0 III 8 i 1969/7/24 13:10 36.0 84.0 III 16 1971/7/12 21:03 36.0 84.0 V 17 1971/10/9 11:43:33.8 35.9 83.5 V/3.7 17 1973/10/30 17:58:39.0 35.75 84.00 V/3.'4 18 1973/10/30 18:09 35.75 84.00 18 1973/11/30 02:48:41.2 35.80 83.96 VI/4.6 18 1973/11/30 03:51 35.80 83.96 II 18 1973/11/30 04:27 35.80 83.96 18 1973/12/13 10: 35.80 83.96 III 18 1973/12/14 35.80 83.96 III 18 1973/12/21 03: 35.80 83.96 III 18 1973/12/21 13:30 35.80 83.96 III 18 1975/5/2 11:22:58.7 35.92 84.45 III/2.6 19 / 1976/2/4 14:53:52.9 25.00 84.75 VI/3.0 / 20 1977/7/27 17:03:21.3 35.42 84.42 V/3.5 21 1979/8/13 00:18 35.21 84.35 V/3.7 22 1979/9/12 01:24 35.59 83.?O v/3.2 22 1980/6/25 12:02 35.78 84.05 V/3.3 23

m TABLE 1 continued: (Page 2 of 3) YEAR /MO./ DAY TIME (FST) LAT. LONG. Io/M REF. 1918/6/21 20:00 36.1 84.1 IV 4 1920/12/24 02:30 36.0 85.0 V 5 1921/12/15 08:20 35.8 84.6 V 4 1938/3/31 05:10 38$ 6 83.6 IV 6 1940/10/19 00:55 35.0 85.0 IV 5 i, 1941/3/4 01:15 36.0 83.9 III 5 1945/6/13 22:35 35.2 84.9 V 7 1946/4/7 00: 35.2 84.9' III 6 1947/6/6 07:55 36.0 84.0 III 6 1948/2/9 19:04 36.4 84.1 V 6 1950/6/18 23:19 35.8 84.0 IV 5 1953/11/10 09:45 36.0 84.0 IV 8 1953/12/5 08:45 36.0 84.0 IV 8 1954/1/14 36.0 84.0 IV 8 1954/1/22 20: 35.3 84.4 V 9 1955/1/12 01:25 35.8 84.0 IV 10 1955/1/25 14:34 36.0 84.0 IV 10 1956/9/7 8:36:01 35.5 84.0 VI 11 1956/9/7 8:49:29 35.6 84.0 V 11 1957/6/23 01:34:18 36.5 84.5 V 12 1957/11/7 12:15 36.0 84.0 IV 8 1959/6/12 20: 35.4 84.3 IV 13 1960/4/15 05:10:10 35.8 83.9 V 14 1964/7/28 36.0 84.0 III 8 1964/10/13 11:30 36.0 84.0 III 8 1966/10/24 01:00 35.8 84.0 IV 15

m 4 t i TABLE 1 4 i (Page 1 of 3) IIISTORIC EARTl! QUAKE'S IN TENNESSEE BETWEEN 83 W AND 85 W LONGITUDE YEAR /MO./ DAY TIME (EST) LAT. LONG. Io/M REF. 1777/11/16 02: 36.0 84.0 IV 1 1844/11/28 07:00 36.0 84.0 VI 2 I 1861/ 36.3 83.5 III 3 l 1875/11/12 02:00 36.0 84.0 III 3 1877/5/25 36.0 84.0 III 3 j 1877/11/16 02:20 36.0 84.0 IV 3 1884/8/24 19:45 36.0 84.0 IV 3 l 1889/9/28 35.1 84.7 II 3 l 1904/3/4 19:30 35.7 83.5 V 2 1913/3/28 16:50 36.2 83.7 VII 2 1913/4/17 11:30 35.3 84.2 V 2 1913/5/2 01:00 35.5 84.4 III 4 1913/8/3 11:45 36.0 84.0 IV 4 1914/1/23 22:24 35.6 84.5 IV 4 1914/1/23 22:41 35.6 84.5 III 4 1917/1/26 07:15 36.1 83.5 III 4 1917/3/4 21:07 36.0 84.0 III 4 1917/3/25 16:15 36.1 83.5 III 4 1917/3/26 07:50 36.1 83.5 III 4 1917/3/27 15:00 36.1 83.5 IV 4

l SEISMICITY REFERENCES (Refer to Table 1) ~

1. Winkler, L.,

1978, Early American earthquake history for. nuclear reactor site selection, prepared for Nuclear Regulatory Commission, Contract NRC-04-78. 208,p, 1-61

2. Coffman, J. L. and Von Hake, C.A.,

1973, Earthquake History f of the United States, U.S. Dept. of Commerce, N.O.A.A., [ No. 41-1 (through 1970), p. 1-208.

3. Moneymaker, B.C., 1955, Earthquakes in Tennessee and nearby sections of neighboring states 1851 to 1900: Tennessee i

Academy of Science Journal, Vol.30, No.3, p. 222-233.

4. Moneymaker, B.C.,

1957, Earthquakes in Tennessee and nearby sections of neighboring states 1901 to 1925: Tennessee Academy of Science Journal, Vol.32, No.2, p. 91-105.

5. McClain, W. C. and Meyers, O.M.,

1970, Seismic history and seismicity of the southeastern region of the United States, Oak Ridge National Laboratory, Oak Ridge, Tenn., Union Carbide Corp., for the U.S. Atomic Energy Commis-i l sion, p. 1-43.

6. Moneymaker, B.C.,

1958, Earthquakes in Tennessee and nearby 4, sections of neighboring states 1926 to 1950: Tennessee Academy of Science Journal, Vol.33, No. 3, p.224-239. l

7. Bodle, R.R. and Murphy, L.M., 1947, United St'tes Earthquakes a

l 1945, U.S. Dept. Commerce, Coast and Geodetic Survey, Serial No. 599, p. 1-38.

8. Moneymaker, B.C.,

1972, Earthquakes in '_'ennessee and nearby sections of neighboring states, 1951-1970, Tennessee Academy of Science Journal, Vol.47, No.4, p. 124-132. l l

9. Murphy, L.M.,

and Cloud, W. K., 1956, United States Earthquakes 1954, U.S. Dept of Commerce, Coast and Geodetic Survey, j Serial No. 793, p. 1-110.

10. Murphy, L.M.

and Cloud, W. K., 1957, United States Earthquakes 1955, U.S. Dept of Commerce, p. 1-83.

11. Brazee, R.J.

and Cloud, W.K., 1958, United States Earthquakes 1956, U.S. Dept. of Commerce, p. 1-78.

12. Brazee, R.J.

and Cloud, W.K., 1959, United States Earthquakes 1957, U.S. Dept of Commerce, p. 1-108.

13. Eppley, R.A.

and Cloud, W.K., 1961, United States Earthquakes j 1959, U.S. Dept. of Commerce, p. 1-115. i e - ess, m. v e eme e. .+,., ..ee.e-.

14. Talley, H.C.

and Cloud, W.K., 1962, United States Earthquakes 1960, U.S. Dept of Commerce, p. 1-90.

15. Von Hake, C. A. and Cloud, W.K., 1968, United States Earthquakes 19 6 6, U. S. Dept. of Commerce, p. 1-110.

16. Von Hake, C. A. and Cloud, W.K., 1971, United States Earthquakes 1969, U.S. Dept. of Commerce, p. 1-80.

17. Coffman, J.L.

and Von Hake, C. A., 1973, United States Earthquakes 19 71, U. S. Dept of Commerce, p. 1-174.

18. Cof fman, J.L., Von Hake, C. A., Spence, W.,

Ca rve r, D. L., Covington, P.A., Dunphy, C.J.,

Irby, W.L.,

Person, W.J. and Stover, C.W., 1975, United States Earthquakes 1973, U.S. Dept. of Commerce, U.S. Dept. of Interior, p. 1-112.

19. Person, W.J., Simon, R.B.,

and Stover, C.W., 1977, Earthquakes in the United States, April-June, 1975, U.S. Dept. of Interior, U.S. Geological Survey Circular 745-B, p. 1-27,

20. Simon, R.B.,

Stover, C. W., Person, W.J., and Minch, J.H.,

1978,

[ Earthquakes in the United States, January-March 1976, U.S. Department of Interior, U.S. Geological Survey Circular 766-A, p. 1-27.

21. Stover, C.W., Simon, R.B.,

and Person, W.J., 1979, Earthquakos in the United States, July-September, 1977. U.S. Geological Survey Circular 788-C, p. 1-26. ?

22. Minch, J.H.,

S tover, C. W., Person, W.J. and Smith, P.K.,

1980, Earthquakes in the United States, July-September 1979.

U.S. Geological Survey Circular 836-C, p.1-39.

23. Bollinger, G.A., and Ellen Mathena, Seismicity of the Southeastern United States, Bulletins 1 through 7, April 19 78 through May 19 81.

V.P.I.& S.U., Blacksburg, VA. F 4.s

REFERENCES CITED Bollinger, G.A., 1981, The Giles County, Virginia, seismic zone-configuration and hazard assessment: in Earth-quakes and Earthquake Engineering in the Eastern. United States, J.E. Beavers, ed., Vol.1, Ann Arbor Science Publishers, Inc., Ann Arbor, Michigan, p. 277-308. Bollinger, G.A., Langer, C.J. and Harding, S.T., 1976, The Eastern Tennessee earthquake sequence of October through December, 1973, Bull. Seism. Soc. Am., Vol. 66, No.2, pp. 525-547. Bollinger, G.A., and Wheeler, R.L., 1981; The Giles County, Virginia, seismogenic zone, unpublished draft manu-script to be published as a U.S. Geological Survey professional paper. Bollinger, G.A., and Wheeler, R.L., 1980, The Giles County, Virginia, seismic network - monitoring results, 1978-1980, Earthquake Notes, Vol. 51, p.14. Dewey, J. W. and Gordon, D., 1980, Instrumental seismicity of the eastern United States and adjacent Canada, Earthquake Notes, Vol. 51, p. 19.-

Herrmann, R.B.,

1979, Surface wave focal mechanisms for eastern North American earthquakes with tectonic implications, Journal of Geophysical Research, Vol.84, No. B7, p. 3543-3552.

King, E.R.,

and Isidore Zietz, 1978, The New York-Alabama line-ament: geopaysical evidence for a ma]or crustal break in the basement beneath the Appalachian basin, Geology, Vol.6 No.5, pp. 312-318. Langer, C. J., and Bollinger, G. A., 1971, Acoustical Phenomenon Associated with Virginia Earthquakes, G.S. A., Southeastern Section, 5th Annual Meeting, Abstract, 326 p. Law Engineering Testing Company in conjunction with Burns and Roe, Inc.,1975, Report on Evaluation of Intensity of Giles County Virginia Earthquake of May 31, 1897.

Neumann, F.,

1954, Earthquake Intensity and Related Ground Motica, University of Washington Press, Seattle, Washington. L ~

i -Nuttli, O.W., 1979, The relation of sustained. maximum ground acceleration and velocity to earthquake intensity and magnitude, Misc. paper S-73-1, State of the Art for Assessing Earthquake Hazards-in the United States,. Report No. 16, U.S. Army Engineer Waterways Experiment Station, Vicksburg, Miss. 74p. Nuttli, O.W., 1981, Telephone conversation with Law Engineering Testing Company. Project Management Corporation, Preliminary Safety Analysis Report, Clinch River Breeder ~ Reactor Plant

Singh, S.K.,

Bazan, E.,.and Esteva, L., 1980,' Expected earth-quake magnitude from a fault, Bull. Seism. Soc. Am., Vol.70, pp. 908-914.

Stover, C.W.,

Reagor, B.G. and Algermissen, S.T., 1979, Seis-micity map of the state of Tennessee, U.S. Geological Survey, Misc. field studies map MF-ll57. Trifunac, M. D., and Brady, A. G., 1975, on the correlation of seismic intensity scales with the peaks of recorded strong g ground motion, Bull. Seism. Soc. Am., Vol. 65, pp.139-162. 1.

Watkins, J.S.,

1964, Regional geologic implications of the [~ gravity and magnetic fields of a part of eastern Tenn-1 essee and southern Kentucky, U.S. Geological Survey ,~ Prof. Paper 516A, 17p. I Wyss,11., 1979, Estimating may.inum expectable nagnitude of I earthquake from fault dimensions, Geology, Vol.7,

p. 336-340.

i

Wyss, M., 1980, Comment and reply on estimating maximum expec-table magnitudes of earthquakes from fault dimensions, Geology, Vol.8, No.4, pp. 162-164.

Page - 3 [82-0342] #68 Ouestion C O'50.5 Ref erence 1 on page 2.5-21 end Ref erence 11 on page 2.5-23 are not to the right publications. Ref erence 129 Is not in the reference list.

Response

The response to this question has been Incorporated into revised PSAR Sections i 2.5.2.1, 2.5.2.3 and References. i 1 i l l l 4 QCS230.5-1 Amend. 69

~ P0ge - 2 L82-0320.] )69'*- " ~~' " "-'~'~---' i The Nuclear Island structures and the Emergency Cooling Tower will be founded on rock. The Category i Fuel Oil Storage Tanks will be supported on compacted Class ' A' structural backfill overlying competent slitstone. Consequently, both rock and overburden response to vibratory motions are a consideration in evaluating f oundation bearing capability. l 2.5.2.2 Nearby Tectonic Structures l l A tectonic structure is a large scale dislocation or distortion within the earth's crust with its extent measured in miles. The tectonic structures in the Valley and Ridge consist of numerous Paleozole thrust f aults and f olds l (see Figure 2.5-2.) These structures were formed during the Allegheny crogeny at the end of the Paleozoic Era (Ref. 81,101). The CRSRP site is situated l between the traces of two inactive tectonic structures: the Copper Creek and Whiteoak Mountain thrust f aults (see Figure 2.5-17). The Inactive tectonic +-"a+-es within the Valley and Ridge do not af fect the determination of the Saf e Shutdown Earthquake; however, the nearest two tectonic structures to the CRBRP site are discussed in Section 2.5.3 and summarized below. 2.5.2.2.1 Conner Creek Fault The Copper Creek Fault is mapped approximately 100 miles in length and the CRBRP site is located near its mid-point. The shortest distance from the CRBRP Plant Isiand to the f ault trace Is about 3,000 feet south. in the site vicinity the f ault strikes north 52 degrees east and dips southeast (away from the site) at an angle of about 25 degrees measured at the ground surf ace. Nearby borings Indicate that the dip angle decreases with depth. In the site area, the Copper Creek Fault has thrust the Rcine Formation over younger rocks of the Chickamauga Group for a horizontal distance estimated in m!les. The stratigraphic displacement is approximat9ly 7,200 feet (Ref. 54). About 65 miles southwest of the site, the f ault becomes a complex zone and merges with the Whiteoak Mountain Fault. The trace of Copper Creek Fault was identified at several outcrop locations in the vicinity of the site and in boring 43. Additional data on the Copper Creek Fault was obtained f rom two test wells, the Joy Test Well (Ref.13) and B29 (Ref. 89), both located on the Oak Ridge Reservation about four mIIes east of the site. The best exposure of the Copper Creek Fault near the site is at the I-40 road cut about two miles southwest of the site. The hanging wall is a dark gray dolcznite of the Rczne Formation, and the foot wall is a gray limestone of the Chickamauga Group. Except for minor undulations, the beds on both sides of the f ault are undistrubed. The Rcune beds strike north 55 degrees east, dip 35 degrees southeast, and the Chickamauga beds strike north 53 degrees east and dip 29 degrees southeast. The apparent dip of the f ault trace is 20 degrees, which Implies a 25 degree dip for the f ault plane at this location. 2.5-21 Amend. 69 May 1982 m

o utp o N Intensity estimates provide the basis for the epicentral locations of earthquakes prior to about 1960. Bef ore 1800, much of the regicn was so sparsely populated that the epicentral locations were identif sed with the sca'tered towns, possibly tens of miles f rom the actual epicenters. Since then, the greater population density, better communications, and more seismograph stations have made It possible to locate areas of gre:: test inter.sity within a few milas. Within the past few years strong motion seismographs have been !nstalled at several nuclear power plants being constructed in the general region. Surf ace Intensities at the site have not been directly observed. The Intensities which occurred at the site have been estimated based on the epicentral Intensity and distance f rcen the CRBRP site (Ref.111). The site area has experienced numerous light to moderate earthquakes. The maximum site Intensity associated with these earthquakes is VI-Vil W. The site Investigation has not produced any physical evidence which can be associated with any earthquakes. 2.5.2.4 Enginea Ing Prooerties of Maiertals Underiving the Site The engineering properties of materials underlying the site are discussed in section 2.5.4.2.

2.5.2.5 f artheuake Historv Two historical eartnquake listings are compiled.

One IIsting, Table 2.5-2 includes historical earthquakes occurring within the region between 29.0 N - 42.0 N latitude and 69.0 N - 94.0 W longitude. This list contains events with epi central Intensities exceeding IV MM and/or assigned magnitudes greater than 3.0. The iIst also contalns information on some signifIcant ear 1y hlstorIcal events f or which neither magnitude nor Intensity data are available. A second listing, Table 2.5-3 contains all earthquakes reported to have occurred within a 50 mile radius of the CRBRP site, regardless of Intensity or magnitude estimates. i 2.5-23 Amend. 69 May 1982

Kgs 1 't uz-0342 r L6,ZlJ F /F - "P (119) Meade, B. K. Report of the Sub-Commission on recent Crustal Movements in North America, N.O. A. A., U.S. Dept. of 1971 Commerce. N.O. A. A. Personal telephone conversation with Let (120) Murphy, L. 1973 Engineering Testing C m pany. l (121) Nuttil, O. W. Prof essor at Saint Louis University, Personal Communication to Law Engineering Testing Company. (122) Seed, H. B. (and Idriss, l. M.; Kelfer, F. W.) Characteristics of Rock Motion During Earthquakes, 1%8 Earthquake Engineering Research Center, Report No. EE-50 G8-5, College of Engineering University of Cal if orni a, Berkeley, Cal if ornia. Seismic Activity in the Atlantic Coastal Plain Near ( 1 23) Taber, S. Charleston, South Carolina; Bulletin, Seismological 1914 Society of America, Vol. 4, No. 3. (124) Technical inf ormation Division, U.S. Atomic Energy Commission 1%7 Summary of Current Selsmic Design Practice for Nuct ear Reactor Fact iItles; John A. Blume and Associates, Engineers, San Francisco, Calif ornia, TID-25021. Tectont c Map of North America; U.S.G.S. and the (125) 1969 American Association of Petroleum Geologists. (126) Tennessee Valley Authority Relationships of Earthquakes and Geology in West Tennessee snd Adjacent Areas. (1 27) 1972 Preliminary information on Clinch River Site for LMFBR Demonstration Plant. (128) U.S. Coast and Geodetic Survey United States Earthquakes, 1928 - 1970. i (129) U.S. Coast and Geodetic Survey I 1956 Earthquake History of the United States. (130) Gutenberg, B. (and Richter, C. F.) Earthquake Magnitude, Intensity, l 1942 Energy, and Acceleration, Bulletin Selsmological Society of America, Vol. 32, No. 3. (131) Gutenberg, B. (and Richter, C. F.) Earthquake Magnitude, intensity, E nergy, and Acceleration (second paper), Bulletin 1956 Seismological Society of America, Vol. 46. 2.5-61 Anend. 69 May 1982

Question M731.1 in addition to the work of Bollinger described in Question 230.4, update the PSAR to include a consideration of all pertinent geological and seismological research and other work that has been done since 1974, which is the latest geological reference cited. Considerable research in geology and seismology j has been done since that time in the southeastern United States. Evaluate these studles as to their significance to the geologic and seismic safety of the CRBR site. Resnonse Ref er to the response to Question 230.1R (related to the Environmental Report) recently provided to NRC which includes the response to this question. The PSAR will be updated to conform with the response to Question 230.1R. 1 b i i QCS231.1-1 Amend. 69 f"vtRETR

p29,

'2 [82-0320] [7I ~~'~~~~ ' ~ ' '~^~~~ ~ ~'~ Ouestion C U31.2 in Supplement 2, page 59, response to NRC Question 323-33 (2.5.3.7), you state that the stratigraphic and structural relationships in excavations for all ' Category I structures will be mapped concurrent with excavation. You f urther state that the AEC (NRC) will be kept f ully informed on the progress of the excavation. It is our position that you notify Geosciences Branch in suf ficient time (at least 1 week) af ter excavating and mapping, and prior to placing gunite, backfill, or concrete, so that a trip to the site can be arranged by a staf f geologist if considered necessary. In addition to bedrock features the map should show the relationship of overlying soils, particularly the high terrace deposits, to structures in the rock. The geologic maps should be included in the FSAR. Resoonse The response to this question has been incorporated into revised PSAR Section 2.5.4.5.1.3. l l l QCS231.2-1 Amend. 69 W

ICge - 7 LU2-0320J f@9 - - - ~ ~ - -~~ -- ~~ j l level will be blasted using pre-split blasting procedures. Berms will be provided at a predetermined vertical Interval. it is expected that ripping may only be feasible for the highly weathered section. Consideration will be given to removing the final 18 Inches of rock by control led means, e.g., air hanmers, however, it is probable that if the final excavation lif t is limited to 7 feet and caref ul control is exercised in blesting, the foundation grade will not be unduly disturbed or cracked f rom the blasting ef f ect. This assumption will be checked in the field prior to i deciding on the method for removal of the final layer of rock above foundation i l grade. In order to prevent damage to freshly placed " green" concrete from blasting operations, the peak particle velocity on the foundation rock and overburden at the location cf fresh concrete will be limited to the following: Time after concrete Placement Peak Particle Velocity 0-11 hours 0.10 In/sec. 11-24 hours 2.00 in/sec. Unbolted side slopes in slitstone and the base of the excavation will be protected f rom deterioration and weathering caused by frost, ponding of water 4 and construction activity by a layer of gunite prior to construction of the mat f oundation. l An extensive Inspection verification program will be established and implemented during construction, and w!Il consist essentially of the folIowIng: A qualified and experienced geologist will be on site insnediately a. 4 prior to the start of excavation and will monitor progress of the work until the base of the excavation has been prepared for the initial mat pour. He will report directly to the engineering and i design organization and will be charged with the responsibility in the field of reviewing and commenting on the adequacy of the construction procedures proposed by the excavating contractor for ripping, blasting and removal of rock, inspecting exposed rock strata including side slopes and base of excavation and preparing a detailed geological map of the area. In addition to bedrock features, the map will include the relationship between overburden solls encountered in the excavation to structures in the rock. The map will be included in the FSAR. l b. A progress report will be submitted to the engineering and design organization on a weekly basis including photographs and detailed j mapping of any significant geological features, t A consulting geotechnical review group consisting of specialists in l c. i rock mechanics and geology will inspect the excavation and report to j the engineering and design organization on their findings at regular intervals, not exceeding one month. 2.5-40a Amend. 69 I May 1982 3%WGT

- - - - - - - ' ' Ta ge - U Luz-us zuj p er -- - - - ~ ~ - - - - - - - - - - ~ ~ ~ ~ * * ' - ~ ' - - d. If a geological discontinuity is noted, the engineering and design organization will be notified immediately and an Inspection will be made by quellflod personnel including members of the review board if const dered necessery. e. The site geologist will be assisted in his inspections If required by readily available air track drills which may be utilized for Investigation purposes including geophysical logging of the holes and analysis of ~ the data, and use of back-hoe or bulldozer with g, ripping capability. Zones of potentially high permeability may be checked by drilling from accessible berms constructed around the perimeter of the excavation. f. The representivity of Boring 55, selected as the central boring in a test grouting program on the west side of the Nuclear Island, will be checked af ter excavation to confirm the homogeneity and satisf actory bearing capability of the foundation strata. This will be done by completing a series of airtrack holes supplemented by geophysical logging and additional core borings as required, extending through the Unit A Limestone. It is the consensus of opInlon among the geotechnical consultants engaged in this project that the satisf actory bearing characteristics of the foundation strata w il l be conf irmed. All borings will be gravity grouted on completion of the progran. g. Formal approval of the prepared base of the excavation will be required by the review board prior to proceeding with trie pouring of the mat. h. The NRC will be kept f ully Informed of the progress of the excavation. In addition, they will be notified at least one week in advance of placing gunite, backfill or concrete on the exposed rock surf ace to permit a trip to be made to the site by a staf f geologist if considered necessary. 1 2.5-40b Amend. 69 May 1982

s ^ ~ ~ ~ ' ' ~ ~ ~ ~ dge ; ~3' ~[82-0320]li2' ~ ~ ~ ~ ~ ' ' ~ p Ouestion c m 1.3 in response to NRC Questen 230.2R during the environmental review, which addressed possible undetected cavities in Unit A limestone, you indicated that a test grouting progra and a bedrock verification program will be conducted and will confirm the homogeneity of the Unit A limestone. Provide a description of the test grouting program and the verification progre, including methods used and -locations and depths of proposed borings.

Response

l The verification program planned for the west side of the Nuclear Island as identifled in the response to NRC Question 230.2R consists of a program of core borings and rotary permssion air borings. A +otal of 34 borings are planned to evaluate the potential for limestone solutioning in foundation substrata within the bearing zone of influence and immediately underlying Category I structures. The actual number of borings to be drilled will depend on the Engineer's evaluation of conditions encountered as the program i proceeds. Boring locations are shown on Figure 231.3-1. All borings will be drilled to a depth of 100 feet into the Unit A limestone. Estimated total depths of proposed borings are outlined on Table CS231.3-1. Nine of the 34 borings will be rock core borings and the remaining 25 are to be drIIIed with mmpressed air and geophysically logged. No test grouting program is planned in conjunction with the verification progr m. The test grouting program ref erred to in response to NRC Question 230.2R was completed during the initial site Investigation work and results l are presented in Appendix 2C of the PSAR. The results demonstrated the integrity and adequate bearing capability of the Unit A limestone in the area tested, which was representative c' limestone most prone to solutioning. The Intent of the currently planned ver.fication progre is to conf irm the adequacy of the limestone over the f ull extent of Category I structures on the west side of the Nuclear Island. l 1 The verif ication progre will include the following features: i The 9 rock core borings will be advanced using an NX core barrel and procedures required by the latest revision of ASTM D2113. The core driller will maintain a written log of conditions encountered such as water losses, sof t zones, cavities, volds and total depth. The site geologist will prepare a written description of the rock core and record the percent recovery and the Rock Quality Designation (RQD). Final graphic boring logs will be prepared similar to those currently in the PSAR. QCS231.3-1 Amend. 69 I C^w 1982

' " ~~~' g _ ~4'[82-0320i'[72' " '~ " " " ~~~~~ ~ " ~~ ~ " ~ ~~~'''~ p; Rotary percussion air borings wilI be 4" (minimum) in dienster Upon completion of each mre and percussion borng, a geophysical log will be made anilar to that shown on Fgure CS231.3-2. The following logs will be obtained: gamma ray, neutron, amustic velocity, compensated density and caliper. These logs will be used to measure the strength of the foundation material and to identify the existence of cavities, clay seams, weathered zones and porous zones. Actual crientation of boreholes with depth will be determined using a j deviation tool. In addition to graphic borings logs, detailed geologic sections will be developed showing such features as existing topography, volds, cavities, water levels, rock classification, stratigraphic boundaries and key geophysical marker horizons. Analysis of these geologic sections will be made to determine the limits and soundness of the Unit A limestone and Upper Siltstone and groundwater conditions. All data will be synthesized with existing PSAR data and figures and incorporated therein. O I I QCS231.3-2 { Amend. 69

~ ~ ~ ~' PJgo - 5 [82-0320] dif ~ ~ ~ ' ' ' ^ '~ i TABLE CS231.3-1 i BORING TYPES AND ESTIMATED DEPTHS VERIFICATION PROGRAM FOR THE WESTERN FORTION OF THE NUCLEAR ISLAND ~ ESTIMATED APPROX. ELEY. OF TOP ESTIMATED DEPTH ** BORlhG* SURFACE OF UNIT "A" TERMINATION OF BORING BORING TYPE ELEVATION LIESTONE ELEVATION (FEET) 150 CB 773 6 95 5 95 1 80 151 CAB 773 6 95 5 95 1 80 152 CB 773 6 95 5 95 1 80 153 CAB 773 6 95 5 95 180 154 CB 773 6 95 595 1 80 155 CAB 773 695 5 95 1 80 156 CB 773 6 95 5 95 1 80 157 CAB 773 6 95 595 1 80 158 CB 773 6 95 5 95 1 80 159 CAB 773 6 95 5 95 1 80 160 CB 773 6 95 5 95 1 80 161 CAB 773 6 95 5 95 1 80 162 CB 773 6 95 5 95 1 80 163 CAB 774 665 565 210 164 CAB 774 665 565 210 165 CAB 774 665 565 210 166 CAB 774 665 565 210 167 CAB 774 665 565 210 168 CAB 774 665 565 210 169 CAB 774 665 565 210 170 CAB 7 80 630 530 250 171 CB 7 80 630 530 250 172 CAB 7 80 630 53 0 250 173 CAB 7 80 630 530 250 174 CAB 7 80 630 53 0 250 175 CB 7 80 630 530 250 176 CAB 7 80 630 530 250 177 CAB 776 710 610 165 178 CAB 776 710 610 165 179 CAB 776 710 610 165 1 80 CAB 776 710 610 165 181 CAB 776 710 610 165 1 82 CAB 776 710 610 165 1 83 CAB 776 710 610 165 TOTAL 6,715

W = Core Boring, CAB = Compressed Air Boring (Rotary Percussion)
- Includes 10 feet contingency NOTES

1) Program may be modified as actual subsurf ace conditions are reported.

2) Estimates Indicated above are preliminary.

Actual footage will depend on elevation of siltstone/Ilmestone contact recorded in borings. l

6 e p:. =- DOWNHOLE GEOPHYSICAL LOGS FROM POWER PLANT FOUNDATION INVESTIGATION GAMMA RAY SOIL AND ROCK DESCRIPTION CALIPER - 0-p eseca saesana supeCatt s eseCatastD Ctat Cowf f wi ACOUSTICg' COMPENSATED NEUTRON VELOCITY gg l DENSITY , e g,- 10-6

/ AV< Ysf V

l .f + * ~

F

-..a. i _ i

- 8 e w= =l$.1I

.m -.3 p..y a.. ) 5 20-R C - ~ ~ - c_ --

,q, C

I

L

) E I EE r3 t E ,n l

t (/ -

CLa v St ats )' E I. _ - =_---- - - - - - m sa Ces PO*05fTY c 2 Dest C"'!ufD 84L L E D J-

FL !

c "' .i h li i !E I a [60-B = r = f E e O 9 sooe ,o.coe,s. coo = a - =- O

j70, caww.

wt L OCIT, e=C at a s =r, Q e. = 3, = a E 75- >=* ~ * " " " ' " ' " " " .e, L.,n o, t C*S l4 DE = SIT Y ll =Cri 1 l =- u- -. __..~ - n-- l D*PICAL GEOPIP.SICAL LOG \\--. m.g .: -w: Figure 4 231.3-2 l

.~ ~. ~ n m EE E E E i hb 3! 3 3 I e e PL.* N T f. W 4 N CIR T H g

p E

+* l \\ M 1 \\ B-77 I e g B-y1, 170 go' c. id e. Vypu/ _ 150 0 s3 178I b !*" # 151 l ad C) 152 0164 L g 171 t, W_ B-32 3-54 7* 17 154 Q165 g 172 / 155 5 1 [. 'a 156 hl r3166 =- 9 173 I 18Q l g /5'(t, y 3~7b \\ t e, g,, 7g7 r..A 158 0 16G .G 174 182 1 E-8 '. o 159 c 1 N n, -w o n l \\ s N183, 1600 6G 175 Q-m. l f5 l-161g B-33' % I 25 169 S-5Pg / d162 N5' N e g -) ,g.).7 6 ( Reactor 7 Containment fl Building fr-l 2r-l 3r-l 35-g /2o- -i c,=- B-69 -90 l-e 4 + 1 G Cc=pleted Core Borings O Proposed Core Borings O Proposed Air Track (RotaYy Percussion) Borings ~. - _m PROPOSED VERIFICATION PROGPAM BORINGS CS Figu:refI 231.3-1 Scale: 1" = 50'}}

ML20054F134

Contents

Text

Dear Mr. Check:

Reference:

=

=====rs

Response

SUMMARY

Response

Response

Navigation menu

ML20054F134

Text

Dear Mr. Check:

Reference:

=

=====rs

Response

SUMMARY

Response

Response

Navigation menu

Search