ML18353A929

Transmittal of Draft Statements on Geology of Quad-cities Station in Illinois and Michigan

ML18353A929
Person / Time
Site:	Palisades
Issue date:	11/11/1966
From:	Lemmon D US Dept of Interior, Geological Survey (USGS)
To:	Case E US Atomic Energy Commission (AEC)
References
Download: ML18353A929 (3)

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UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY WASHINGTON, D.C. 20242 Navember 11, 1966 Mr. Edson G. Case, Deputy Director Division of Reactor.Licensing

u. s. Atomic Energy Commission 4915 St. Elmo Avenue .. ' IJ Bethesda, Maryland 20545 r.1*1,

Dear Mr. Case:

Transmitted herewith are draft statements on the geology of the.

Quad-Cities Station site and the Palisades Plant site in Illinois and Michigan.

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\ If you have any comments or need additional information on which

\ to base yotir evaluations of site suitability, please let us know.

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Sincerely yours,

~v.:3~n. ~*~

\ Dwight M. Lemmon

\ Assistant Chief Geologist

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\* for Engineering Geolo$Y

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• Enclosures

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-::,- UNITED STATES

. DEPARTMENT OF THE INTERIOR

. GEOLOGICAL SURVEY WASHINGTON, D.C. 20242 Quad-Cities Station Rock Is~nd County, Illinois Geology Based on a review of the applicant's report (A.E.C. Docket 50-254) and available literature, it appears that their +egional geologic

'\ analysis is logically derived and presents an adequate appraisal of most

, of those aspects of the geology which would be pertinent to an engineering

'\- __.evaluation of the site.  :'

.\' . Although it may be anticipated that earthquakes within the general regionZlWill continue to occur with approximately the same frequency and

\ with approximately the same intensity with which they have been recorded

\ during the past 100 years, there are rio identifiable faults or other

\geologic structures which could be expected to localize earthquakes in the

'immediate vicinity of the site.

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Projection of available subsurface data from Logs of Borings (fig. 16) and*~ the Bedrock Surface Contour Map (fig. 17) to the centerline oL the read.tor building as shown on the Plot Plan (fig. 23), suggests that the i!,

• bedrbck surface there lies at an elevation of approximately 475 feet. The footihg elevation of the reactor building, as shown on Figure 29, is appro~fmately 540 feet. Presumably either relocation of tqe reactor buildi~g or redesign of _the footings will be required to ensure placement of the\footings on sound bedrock.

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.- r Henry W. Coulter November 7, 1966

UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY WASHINGTON, D.C. 20242 Palisades Plant .

Van Buren Cowity,, Michigan Geology Based on a review of the applicant's report (A.E.C. Docket 50-255) and available literature, it appears that their regional geologic analysis is logically derived and presents an adequate appraisal. of most of those aspects of the geology which would be pertinent to an

_engineering evaluation of the site.

Although it may be anticipated that earthquakes within the general region will continue to occur with approximately the same frequency and with approximately the same intensity with which they have been recorded \'

during the past* 100 years, there are no identifiable faults or ot:l~er geologic structures which could be expected to localize earthquakes in

• the immediate vicinity of the site. It would appear that the general level of seismi*c activity at the site would be comparable to that characteristic of other localities in the Circum-Canadian Shield belt.

The fact that the footings of the plant are to rest on saturated wicon-solidated deposits rather than on bedrock suggests the possibility of ....

\ some degree of seismic amplification.

\\ As pointed out in Appendix D--Foundation Investigations, additional

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borings immediately beneath the proposed location of the structure will

\ be required in order to delineate the type and distribution of materials *

there. This information will be required as a basis for computing

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bearing pressures and settlement parameters to be used in final folll'ldation design.

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Henry w. Coulter November 7, 1966

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