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COLORADO DEPARTMENT OF HEALTH <br />Water Quality Control Division <br />4210 East 11th Avenue <br />Denver, Colorado 80220 <br />Page 2 of 3 <br />Permit N0. COG-850018 <br />III. RECEIVING STREAM: <br />A. Identification, Classification, and Numeric Standards <br />1. Identification <br />Unnamed tributaries to Hayden Gulch, Upper <br />Colorado River basin, Yampa River sub- <br />basin, Segment 12 <br />2. Classification <br />3. Numeric Standards: <br />B. Receiving Water Data <br />Recreational, Class 2 <br />Aquatic Life, Class 2 (Cold) <br />Agricultural Use <br />The standards which have been assigned in <br />accordance with the above classifications <br />can be found in 3.3.0 Classification and <br />Numeric Standards for the Upper Colorado <br />River Basin and North Platte River <br />(Planning Region 12), as amended March 1, <br />1992. It should be noted that this <br />facility does not discharge pollutants <br />which are limited by water quality <br />standards with the exception of pH. <br />1. Stream Low Flow: Not Applicable; effluent limitations are not flow <br />based. <br />IV. FACILITY INFORMATION: <br />Sedimentation ponds, designed to contain the 10-year, 24-hour <br />precipitation event, exist at the mine site. <br />The facility is currently active, however, any discharges from the <br />facility should consist of surface runoff only. If discharge of mine <br />water, prep plant water, sanitary water or other non-surface runoff <br />related water becomes necessary, the Permittee will have to request that <br />an individual NPDES permit be drafted prior to the occurrence of such <br />discharge, to replace this general permit. <br />V. ANTIDEGRADATION: <br />These are not reviewable waters pursuant to Section 3.1.8(3)(a) of the <br />Basic Standards and Methodologies for Surface Water (5 CCR 1002-2), based <br />on a finding of no increased water quality impact. <br />