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:~ - ~ <br />f'~ttr'r• f;t~rrr~t•ation <br />it Ms. Camille M. Farrell, Reclamation Specialist <br />Mined Land Reclamation Div_is_ion <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />Dear Ms. Farrell: <br />~ III IIIIIIIIIIIII III <br />r`E5~ 6e`vuD nvEa~E s iTE . <br />> o r.r _ •a.. pp ~ <br />July 17, 1985 <br />„ ~ . ~~ <br /> <br />In response to your letter of June 7, 1985, regarding your questions on <br />Cotter's Temporary Cessation Extension Request for its mining ooerations, <br />the following answers-.and explanations are submitted. <br />1. C-JD-7 U.C. (77-308} (110 permit - Limited Impact) <br />a. & b. The mine is still being dewatered on a daily basis into a two- <br />pond system with a treatment plant operation pursuant to Pollutant <br />Discharge Elemination System discharge permit CO-0036251. The old <br />evaporation pond area is being used as part of the new system. <br />c. No erosion has occurred as a result of the dewatering. The system <br />is totally controlled to the final discharge. <br />2. C-JD-7 Pit (79-94)(112 permit) <br />a. Please remove this mine from this extension of Temporary Cessation <br />request. If it is not in operation by April, 1986, I will file a <br />request at that time. <br />b. To date, the spoil pile has not experienced any significant erosion. <br />,. <br />3. C-SR-13A (77-311) (110 permit.- Limited Impact) <br />a. Cribbing was installed in the area shown on the mine permitting <br />map. <br />b. Depending on the si,ze_of the dump when reclamation is started, it <br />may be best to remove ~'ne cribbing, and grade and contour the waste <br />material to stablize the bench area above. This proposed plan is <br />supported by the Department of Energy. <br />4. C-SM-18 (78-116) (112 permit) <br />x.11 .'~ .. <br />a. The evaporation pond was constructed after mine development began <br />and the mine sump is pumped on an irregular basis (i.e., once a <br />month). <br />