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WIN� , t 110 Wias,Janney,Elstner Associate:,Inc. <br /> r� 111 r'FC r, 3609 South Wadsworth Boulevard,Suite 400 <br /> I RI A I S SC'I t N I I ti I Lakewood,Colorado 80235 <br /> 303.914.4300 tel 1 303.914.3000 fax <br /> www.wje.corn <br /> Via E-mail: srm1998@gmail.com RECEIVED <br /> February 18,2019 FEB 2 5 201p <br /> Mr. Chris Fedrizzi <br /> Site Resource Management WAS"OFWQAW1y4N <br /> PO Box 4260 ANNAND>! <br /> Eagle, CO 81631 <br /> Re: DRMS Request,Tower Pit,Vail Valley Ranch Partnership,Gypsum,Colorado <br /> WJE Project No.2017.7601 <br /> Dear Mr. Fedrizzi: <br /> Wiss, Janney, Elstner Associates, Inc. (WJE) previously prepared a slope stability analysis report for the <br /> above referenced site, dated June 29, 2018. We understand that the State of Colorado Division of <br /> Reclamation,Mining,and Safety has asked that we specifically address slope stability in regard to potential <br /> impacts to the following nearby infrastructure: <br /> 1.) Highway 6 <br /> 2.) Overhead power lines and power poles <br /> 3.) Buried power lines <br /> 4.) Buried gas lines <br /> 5.) Buried telecommunication lines <br /> 6.) Airport Road off Highway 6 <br /> 7.) Fences <br /> 8.) Runways <br /> 9.) Helipads <br /> I0.)Airport structures within 200 feet of mining operations <br /> In response, we believe that the proposed gravel mining operation will have no adverse impacts on any of <br /> this infrastructure. As indicated in our June 29, 2018 report, our analyses indicate that the mined 2:1 <br /> (horizontal: vertical) slopes are expected to have factors of safety of 1.5 or greater. Stable slopes should <br /> have no adverse impacts on any of the improvements listed above. We note that for infrastructure that is <br /> close to the crest of the slope, such as the existing airport fence, it will be important to implement <br /> reclamation plans in a timely manner to control erosion on the slope. If you have any questions,please call. <br /> Sincerely, <br /> WIS ,JANNEY 1STNER ASSU IATES,INC. <br /> Francis E. rrisQhl P•= 771 Wad <br /> Associate Principa]09 - :. € <br /> fle <br /> U11111W quarters&Laboratories-Northbrook,Illinois <br /> Abu Dhabi I Atlanta I Austin I Boston Chicago I Cleveland I Dallas I Denver I Detroit I Dubai I Honolulu I Houston I Los Angeles <br /> Minneapolis I New Haven I New York I Princeton I San Francisco I Seattle I South Florida I Washington,DC <br />