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(303) 945-7004 <br />' FAX (303) 9455948 <br />..~..~~ <br />October 11, 1893 <br />Mr. Rick Mills <br />Cyprus Yampa Valley Coal Company <br />28587 Routt Co. Road iF27 <br />Cak Creek, Co. 804&7 <br />RE: Wastewater Treatment Plant Impoundment Certification <br />Dear Rick: <br />tODt Grand Avenue, Sull~'?E <br />Glemrood Sprir>Ss, CO 81601 <br />The purpose of this letter is to certify that the Wastewater Treatment Plant ponds <br />have been constructed in accordance with SGM'6 design drawings dated 5eptemher <br />1992. On May 26th I inspectetl the ponds. At the time of my visit, the first aerated <br />pond was about 2/3 full of water. Tho downstream cmbankmtnt at that time sowed <br />no signs of seeps, wetness or dampness, Further, pond ft2 had approximately 6^ to <br />12" of water from a previous water test, Again, the ;finer for this pond appeared to <br />be holding water because according to Ron Qoldcn, the water had been In the pond <br />for several days, <br />All pond dimanaiens appear to be consistent with the original design drawings. <br />• <br />I have reviewed the soils testing performed during construction to verify that the <br />em6nnkmento were compacted to the specified densities. Upon review of the density <br />rcparts, all of the embankments exceeded the required 85X of maximum density <br />specified. In several cases the preliminary test was below the required 95X but <br />further retesting was accomplished In this area and exceeded sSX. <br />As you are aware, a soils engineer worked with us to design the ponds. The ponds <br />(impoundments) were designed to retain water, ar,d based upon my observations on <br />the 26th, the ponds were built in accordance with our plans and specifications. <br />It we can provide you any additional information, please contact me. <br />sincerely, <br />SCHMUESER GORDON MEYER,INC. <br />Lours Meyer, P.E. <br />cc: Ron Golden <br />IAarcus Middleton <br />_; ~; <br />LOMi 1a91085.1 <br />