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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division Rationale - Page 3. Permit No. CO-0036595. IV. FACILITY DESCRIPTION The previous permit listed two additional wastewater sources: preparation plant water and domestic waste. The preparation plant water is now totally recycled in holding pond 112 (formerly discharge point 003), and the domestic wastewater is treated and then routed to pond f12 as well, to be used for preparation plant makeup water. The facility is covered under federal regulation 40 CFR 434, [he Coal Mining Point Source Category, Subpart D, Alkaline Mine Drainage, and Subpart F, Miscellaneous Provisions, L•ffluent Limitations for Precipitation Events. B. Wastewater Treatment Description Treatment is provided for the mine water and surface runoff by unlined sediment ponds. There are six ponds in use at the site. Surface runoff from the coal stockpile and preparation plant area goes to sediment pond 111 (discharge paint 001). Surface runoff from the refuse area goes to sediment pond 114 (discharge point 002). Mine water is pumped from two dewatering wells, on an intermittent basis, to settling pond 113. From there it can be routed via an underground pipeline to the preparation plant for makeup water, or discharged at point 005. Mine water may also be pumped to sediment pond I15 (discharge point 004). This is not currently being done, but the permittee wishes to maintain the flexibility to do it. Otherwise, surface runoff From disturbed areas is the only flow into pond I15. There is an evaporation pond located next to pond I11. It is used for treatment of low volumes of preparation plant water, and is non-discharging. Holding pond 112 is used for preparation plant wastewater recycling, and for storage of chlorinated effluent from the bath house and other sanitary wastewater. The water is reused in the preparation plant. Pond 112 no longer discharges to state waters, and so will no longer be included under any of the discharge points. Since the waste characteristics for this discharge have changed, the discharge poin*_ number will be changed from 003 to 005, and point 003 inactivated. The discharge points are listed below: Table IV-1 -- Discharge Points D. Pt. Wastewater Source Treatment llesign Cap., MC Receiving Waters 001 Stormwater runoff Sediment pond I11 0.945 hfagpie Creek 002 Stormwater runoff Sediment pond 114 1.512 Unnamed tributary to Newlin Creek 003 Kline dewatering Sediment pond 113 0.6 Magpie Creek 004 Stormwater runoff, Sediment pond I15 1.747 Magpie Creek mine dewatering