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COLORADO DEPARTMENT OF PUBLIC HEALTHAND ENVIRONMENT, Water Quality Control Division <br />Rationale -Page 2, Permit No. CO-003625/ <br />rl. FACILITYINFORMATION(CONTINUED) <br />F. Discharge Paint: 001 from Mine JD-7: Discharges io an unnamed tributary which Jlorus in a northerly <br />direction to East Paradox Creek, then approximately 8 miles to the Dolores River. The <br />total distance from 001 to the Dolores River is approximately 12. S miles. <br />38° 14.39 north, 108° 45.07 west. <br />002 from Mine JD-9.• Discharges to an unnamed tributary to Fawn Springs, which goes <br />to Bull Carryon then to the Dolores River. The total distance from discharge point 002 to <br />the Dolores River is approximately 10.5 miles. <br />38° 12.47 north, 108° 47.36 west. <br />Except during major storm events, the two discharges do not reach the receiving waters <br />of East Paradox Creek or Bull Canyon, tributaries to the Dolores River. <br />G. Facility Flows: 001 Design Flows: 0.2 MGD =Maximum Flow <br />002 Design Flows: 0.3 MGD =Maximum Flow <br />H. CDMG Permit No.: JD-7: M-77-308 <br />JD-9: M-77-306 <br />III. RECEIVING STREAM <br />FABL Environmental Regulatory Specialists, Inc has performed an assessment of the stream standards, low flow data, and <br />mnbient sh•eam data for the Water Quality Control Division, and determined the assimilative capacities of this water body for the <br />pollutants of concern. The Permits Unit has reviewed the assimilative capacities and determined the appropriate water quah"ty <br />based permit [imitations. This information can be found in Appendix A and Table VI - 2 of the rationale. <br />!V FACILITYDESCRIPTION <br />A. Industry Description <br />1. Tvne oflndustn~ ~ The Cotter Corporation JD-7 and JD-9 mine sites are underg'ound uranium and vanadium mines. Prior <br />to 1980, the design production rate was I50 tons/day; the ore was notprocessed on site but was transported to the Cotter <br />Canon City rattling facility for processing. Since 1980, however, the mines have not been actively operating and mine <br />dewntering occurs firom two previously mined sites, JD-7 and JD-9. While not actively producing, the JD-7 and JD-9 mines <br />are kept in an active standby staurs ready to resume production. Since the minefaeilities are intermittent operations that, <br />while not actively producing, do conduct mining activities, the facilities are subject to the provisions of the Federal Clean <br />Wafer Act and applicable Stare Discharge Regulations. <br />2. Sources to the Treatment Plants: The wastewater sources consist ofdewatered mine water from the two mines, stonnwnter <br />runoff is diverted so that it will not enter the ponds or treatment system. Because the mine water has been in contract with <br />the minerals in the mines, iiforms n mineral-rich leachnte. This water is collected from the mines and pwnped to sumps, <br />when the smnps are full the water is pumped to the surface water treatmentplants. Barium Chloride is then added to <br />precipitate radium, and the treated effluent is allowed to settle in a series of connected, Zined settling ponds prior to <br />discharge to ephemeral tributaries of the Dolores River. <br />3. Chemicals Used: A 3 % barium chloride solution (along with an anionic polymer to aid in flocculation at the JD-7 <br />treatment facility) is added to the mine drainage water prior to entering the settlingponds. <br />