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-.. <br />` ~ ~ ~„_ <br />TRtAPPER ~tNtN& tp~. III IIIIIIIIililllll <br />I,YYI~YW <br />May 30, 1991 <br />CERTIFIED #P468756362 <br />Ms. Kathryn Dolan <br />Colorado Department of Health <br />Water Quality Control Division <br />4210 Eastilth Avenue <br />Denver, CO 80220-3716 <br />Dear Kathryn: <br />Subject: Facility Inspection of Trapper Mining Inc. -Trapper Mine - <br />CDPS Permit No. CO-0032115 <br />~CVG~ V G~ <br />JUN 3 1991 <br />iAined Land <br />Reclamation Division <br />On May 9, 1991, the Water Quality Control Division submitted correspondence to Trapper Mine (Gary <br />Stubblefield) reporting on the results of their January 23, 1991, inspection. The Division's only concern was <br />that the flow monitoring device used at NPDES site 1102 (No Name Drainage) was possibly inaccurate. Fur- <br />ther, the Division requested flow measuring devices at all NPDES sites (minewide) be checked and cali- <br />brated as necessary by June 7, 1991. <br />Following is a brie( overview describing the accuracy of flow measuring devices at Trapper Mine. Each <br />flume was surveyed for accuracy on or before May 24, 1991. To verify this work, Trapper proposes to review <br />survey notes and field inspect all repaired flumes with our CMLRD field inspector during our next monthly <br />inspection (June). The CMLRD inspector responsible for Trapper Mine is Larry Routten. I will forward a <br />copy of his inspection report to your office following his field evaluation. <br />NPDES <br />Site Drainaee Flume accuracy <br />001 Johnson Gulch This flume will be removed and reestablished at a <br />new location (nearer the principal spillway) as part of our <br />proposed spillway construction modification during <br />the summer of 1991. <br />002 No Name Gulch This flume was repaired on 523/91. It is currently <br /> accurate to .005 ft. <br />003 Easl Buvard Gulch No repairs required. Accurate to .Ol ft. <br />005 Coyote Gulch This flume will be repaired prior to June 7, 1991. <br /> The flume is currently inaccurate by .105 ft. <br />006 West Buvard Gulch No repairs required. Accurate to .03 ft. <br />008 Ute Gulch No repairs required. Perfectly level. <br />009 Middle Pyeatt Gulch No repairs required. Accurate to .005 ft. <br />P.0. Box 187 Craig, Colorado 81626 (303) 824-4401 <br />