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eh <br />ESPEY, HUSTON BASSOCIATES, INC. <br />J <br />CHAPTER P: MITIGATION/PROTECTION OF THE HYDROLOGIC BALANCE <br />1.0 WATER OUALTTY STANDARDS AND EFFLUENT LIMTTATIONS <br />To ensure that the water quality of State waters is not adversely <br />affected by the Meeker Area Mines any and all dischazges to State waters, whether <br />from water storage facilities or directly From the mines, will comply with all State <br />and Federal water quality regulations. At a minimum, all dischazge to State waters <br />will meet the following effluent limitations established by the OSM and the CMLRB <br />as applied to the State of Colorado. <br />Effluent Limitations <br />Maximum Allowable <br />• pH (units) range 6.0 to 9.0 <br />Iron, total 7.0 mg/1 <br />Manganese, total 4.0 mg/1 <br />Total Suspended Solids 45.0 mg/1 <br />1.1 SEDIMENTATION PONDS AND TEMPORARY DIVERSIONS <br />Mine operation and facility plans (see Chapter C) have been designed to <br />ensure that the hydrologic regime of Curtis Creek is maintained at its pre-mining <br />conditions within effluent limitation guidelines. Some of these plans aze as follows: <br />containment of runoff waters from disturbed surface azeas, the construction of <br />diversion and containment structures to ensure that the water quality of Curtis <br />Creek is not affected by direct runoff from coal stockpiles or disturbed azeas at or <br />neaz the portals and the establishment of containment facilities to handle, if need <br />be, any mine water dischazge not meeting OSM effluent limitations. Together with <br />• <br />P-1 <br />