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REP05895
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REP05895
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Entry Properties
Last modified
8/24/2016 11:36:36 PM
Creation date
11/26/2007 11:12:31 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980003
IBM Index Class Name
Report
Doc Name
ADDENDUM TO GEOTECHNICAL INVESTIGATION REPORT INVESTIGATION OF OVERBURDEN DUMP AREA HAYDEN GULCH COA
Permit Index Doc Type
Waste Pile/Fill Report
Media Type
D
Archive
No
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~ -, CONTRACTORS <br />ENGINEERS <br />~ DEVELOPERS <br />/G ; i _ _ <br />\ • ~?'~ .~r"v,•'~'Q;3.c~.1^.~.Z TC._l ~'°'~v~~~~f•iZ~~, _Z'o-~ <br />..,...r..;,. ~wy..,~_ la. <br />~~~` ~ <br />E%ECUTNE OFFICE <br />TWO MORRI$ON-KNUDSEN PLAZA <br />P O 80% ]808 i 8015E IDAHO 43729 i U S A <br />PHONE (20B~ Sad-5000 • TELEX 3fid433 <br />October 21, 1981 <br />H-G Coal Company <br />333 Quebec Street <br />Denver, CO 80210 <br />Attention: Mr. Cass Legal <br />Subject: ADDENDUM TO GEOTECHNICAL INVESTIGATION REPORT <br />INVESTIGATION OF OVERBURDEN DUMP AREA <br />HAYDEN GULCH COAL MINE <br />ROUTT COUNTY, COLORADO <br />C) Gentlemen: <br />• of i ~ ~~ o ~o o io ~~Q <br />999 O oio <br /> - <br />This letter represents an addendum to the geotechnical investigation report <br />for the investigation of the overburden dump area at the Hayden Gulch Mine <br />in Routt County, Colorado. The original report was transmitted July <br />29, 1981. <br />This addendum presents the results of further consideration of the material <br />properties and hydrologic conditions assumed for the analyses performed for <br />the investigation described in the July, 1981, report. <br />Material Properties <br />The method utilized to select geotechnical parameters was reviewed. Fur- <br />ther reduction of the strength of the materials in the spoil pile could not <br />be justified. The strength of the material below the spoil was also recon- <br />sidered. The source of information for this material is the report for the <br />Soil and Foundation Investigation for the Proposed Five Earthfilled Embank- <br />ments, Hayden Gulch Coal Mine, Routt County, Colorado. The report is dated <br />C <br />M133 <br />
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