GENERAL41305 - Laserfiche WebLink

Home Browse Search

-34- above the F-Seam may be affected. If subsidence occurs, all springs overlying excavated areas have some potential for being affected in the five year permit area. However all water from the springs will remain in the ground water/surface water regime of the North Fork of the Gunnison and there will be no i;~act to down stream water rights.. The applicant anticipates no degradation of ground water quality during mining. All water developed in the mine is to be used foe dust control. 'ihe applicant confirms that "any effluent will be treated as necessary to meet water quality standards prior to discharge." The applicant further confirms "there will be no uncontrolled mine water discharge after mining is complete which might otherwise degrade surface streams or ground water" (v.l, -p. 2-349). The mine operation plans indicate (v. 1, -p. 3-39) that mine discharges may occur when WECC's water rights are not in priority, but again, that all discharges will be appropriately treated. The operation plan further indicates most water used for dust control will be absorbed on the coal and carried from the mine thereby minimizing the quantity to be treated. Any discharge will be delivered and treated in the sedimentation ponds and discharge as specified in the NPDES permit. In order to assess the quantity, quality, and source of mine inflows, and in order to assess the impacts of the mine workings on the hydrologic balance within the mine plan adjacent areas, the Division is requiring the following stipulation to the permit: Stipulation No. 6 THE APPLICANT SHALL CON'T'INUE TO SUBMIT ~ `I'fs DIVISION, AN ANNUAL REPORT OF INFLOWS, DISCHARGES AND ODNSUMPTION OF WATER WITHIN THE MINE. THIS REPORT IS TO INCLUDE A MINE WORKINGS MAP SHOWING THE L(XATION AND QUANTITY OF INFLOWS, A TABLE KEYED TO THE MINE MAP WHICH SHALL CONTAIN THE SOURCE (I.E. FAULT, FR.4CT[JRES, E7C), QUANTITY, DURATION, AND QUALITY (I.E. PH, F.I.ECPRO-CONDUCTIVITY AND TEMPERATURE) OF ALL INFLCWS; A TABLE CONTAINING RECORDS OF WATER DISCHARGED FROM THE MINE, ~NSU[~D IN THE MINE, AND IMPORTED FOR USE WITHIN THE MINE, A DISCUSSION OF THE FETTER BALANCE WITHIN THE MINE, AND FINALLY A PROJECPION OF HYDROLOGIC IMPACTS OF MINING IN THE UPCOMING YEAR. The existing ground water monitoring network, consists of 19 wells, of which 10 are within the five year permit boundary. They will be maintained throughout the life of the mine. Water level measurements are to be made in all wells on a quarterly basis, and water quality samples from nine wells will be collected and analyzed annually. Wells in this monitoring program penetrate the alluvium of the North Fork, the alluvium of Sylvester Gulch, the colluvium and Barren Member, and coals of the B, E, and F-Seams. In addition, within the five year permit area, piezometer holes B-32, SOM-13, SOM-80, 38-H-1, and 38-H-2 will be monitored monthly for water level.