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Central Appalachia WWTF Water Quality Assessment CO-003 APPENDIX A WATER QUALITY ASSESSMENT UNNAMED TRIBUTARIES TO EAST SALT CREEK CENTRAL APPALACffiA MINING, LLC MCCLANE CANYON MINE WWTF Table A-1 Assessment Summa Name of Facility Central A alachia Mining, LLC -McClane Can on Mine WWTF CDPS Number CO-0038342 WBID -Stream Lower Colorado River Basin, Lower Colorado River Sub-basin, Stream Segment Segment 13b: All tributaries to the Colorado River, including wetlands, from the Government Highline Canal diversion to a point immediately below Salt Creek, downgradient from the Government Highline Canal, the Orchard Mesa Canal No. 2, Orchazd Mesa Drain, Stub Ditch and the northeast Colorado National Monument boundary, except for specific listings in Segment 13c. COLCLC13b Classifications Warm Water Aquatic Life Class 2 Class la Existing Primary Contact Recreation A 'culture Desi ation Use Protected I. Introduction The water quality assessment (WQA) of unnamed tributaries to East Salt Creek near the Central Appalachia Mining, LLC -McClane Canyon Mine Wastewater Treatment Facility (Central Appalachia W WTF) was developed for the Colorado Deparhnent ofPublic Health and Environment (CDPHE) Water Quality Control Division (WQCD). The WQA was prepazed to facilitate issuance of the Colorado Discharge Permit System (CDPS) permit for the Central Appalachia W WTF, CDPS Permit No. CO-0038342, and is intended to determine the assimilative capacities available to the Central Appalachia WWTF for pollutants found to be of concern. Figure A-1 on the following page contains a map of the study area evaluated as part of this WQA. The Central Appalachia W WTF dischazges to unnamed tributaries to East Salt Creek. This facility is an active coal mine. Outfall 001 discharges surface runoff water only and outfall 002 dischazges pumped mine drainage only, and each outfall dischazges to a different unnamed tributary. Discharges aze typically intermittent. Appendix A Page 1 of 9 Draft