2003-06-04_REVISION - M2001085 - Laserfiche WebLink

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C GCEI?g Y jUN ®4 200 June 4, 2003 ,®ivisionOfMine rals&Geology Subject: Response to Comments Regarding Slope Stability, Brighton Water Storage Project, Adams County,'Colorado Job No. 02-0065 Mr. Tony Waldron Colorado Division of Mines and Geology Dear Mr. Waldron: Ground Engineering Consultants, Inc., (GROUND) performed a subsurface exploration program and slope stability analyses for the site of the proposed Brighton Water Storage Project southeast of the intersection of 124' Avenue and U.S. Highway 65, in Adams . County, Colorado. Our findings, conclusions and recommendations are summarized in GROUND's report, Slope Stability Analyses, Brighton Water Storage Project, Adams County, Colorado, Job No. 02-0065, prepared for Les Ewegen, LLC, dated May 31, 2002. At the request of Les Ewagen, LLC, -we have reviewed comments by the Colorado Division of Mines and Geology indicating violations pertaining to temporary slope stability. These Comments and our responses.are presented below. Reference is made to our May 31, 2003, report for a description of• the $its surface and subsurface conditions, our general gsotechnical findings and recommendations, and the Limitations on our work, which also apply to GROUND's conclusions and recommendations provided herein. We consider all recommendations in that report n,ot specifically supersedea nereln to remain vano. We understand that measurements by the Division of Mines and Geology on February 11, 2003, indicated that certain temporary slopes at the subject facility were at 68 percent, 70 percent and 71 percent slope gradients - corresponding to slope -angles of about 34 to 351/2 degreep above horizontal. The measured slopes, therefore, were ENGINEERING CON 5ULT ANT5 Phone OnW 2119.1989 Fax (303) 2R4-iGBG 91 j»varnesx C1CIvr East, Englewood, C:O 60112-5412 re: 7393 D&LIa Street, commerce r1ty, GO 80022-1834 www sroundeng.com JVar[h 60 39Vd N393M3 66060Sb0L6Z Z6;SZ £006/b0/90