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_ ~ Trapper fViining ~nc. <br />Box 187 <br />Craig, Colorado 81626 <br />(303)824-4401 <br />July 14, 1983 <br />Harold E. Dolan <br />Engineering Coordinator <br />U.S. Department of Labor <br />Mine Safety and Health Administration <br />P. 0. Box 25367, DFC <br />Denver, Colorado 80225 <br />Dear Mr. Dolan: <br />Following is the required twelve-month status rep=rt on our Coyote Dam <br />facility, I.D. No. 1211-CO-9-0018. <br />Currently the water level in Coyote Dam stands :.= an. elevation of 6306 feet <br />with a stage storage of 57 acre feet. Of this 57 a=ce f:~=t of storage, a sedi- <br />ment survey indicates we may have up to 21 acre feet ~;:` accumulated sediment <br />(worse case), leaving 36 acre feet of actual water >'_ora~;e covering an area of <br />6.7 acres at present. , <br />It is felt that some temporary runoff diversio.~~s this spring due Co mining <br />activities on the upper portion of the watershed cac.sed the unduly heavy accumu- <br />lation of sediment. These diversions will be r_liminated this fall and the <br />drainage pattern returned to normal. Another sediment survey will be conducted <br />next spring; and if results show our sediment storage to be approaching 60X of <br />dead-pool storage, plans will be formulated for sediment removal as per CMLRD <br />requirements. <br />The storage capacity, including sediment, remains at 120 acre-feet and the <br />current water level will likely remain unchanged or decrease over the summer as <br />we are not discharging any ground water from our pits into this facility. <br />