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-31- The applicant must provide information in the application which addresses the impacts of the disposal pile upon water quality. This information must reference applicable environmental baseline information to demonstrate that the refuse pile is being constructed and operated consistent with environmental resources information (eg. minimizing the disturbance to the quality of ground water). To find the applicant in compliance with Rules 2.04.7(1), 2.05.6(3)(b)(iv), 4.05.11(2) and 4.05.13(1)(b), the following stipulations are necessary. Stipulation No.9 PRIOR TO THE DISPOSAL OF ANY WASTE MATERIAL (i. e. DEVELOPMENT WASTES, COAL PROCESSING WASTES, REFUSE, ETC.) ON THE ALLUVIUM OF CIRUELA CANYON, THE PERMITTEE SHALL: A) INSTALL A DOWNGRADIENT MONITORING WELL IN THE ALLUVIUM OF CIRUELA CANYON WHICH IS COMPLETED INTO BEDROCK; B) CONDUCT A PUMPING TEST ON THE ALLUVIUM TO DETERMINE THE PERMEABILITY, TRANSMISSIVITY, AND SPECIFIC YIELD OF THE CIRUELA CANYON ALLUVIUM, OR PROVIDE EXTRAPOLATED INFORMATION FROM SIMILAR ALLUVIAL AQUIFERS; C) COLLECT BASELINE GROUND WATER QUALITY AND GROUND WATER LEVEL DATA ON THE CIRUELA CANYON ALLUVIAL WELL; ' D) ASSESS THE HYDROLOGIC IMPACTS OF THE DISPOSAL PILE AND DEMONSTRATE THAT THE PROPOSED PILE DESIGN WILL MINIMIZE THE IMPACTS TO 7HE QUALITY AND QUANTITY OF ALLUVIAL GROUND HATER IN CIRUELA CANYON AND IN THE PICKET~IIRE VALLEY. E) SUBMIT THE ASSESSMENT AND DESIGN TO THE DIVISION FOR APPROVAL AS A REVISION. After the Cessation of mining operations, the Maxwell Mine water would no longer be discharged. The applicant calculates that 79 years would be required to flood the workings. The recovery of the piezometric surface of the coal aquifer would occur in two stages. The first stage would be a relatively slow increase that would occur as the mine workings are filled by ground water inflows. Once the underground workings have been filled, the piezometric surface would rapidly rise toward its eventual steady state position. A permanent depression in the piezometric surface would exist in the vicinity of the flooded mine workings. The magnitude of the depression would not be large, but it may extend to a distance of 2 to 3 miles from the edge of the mine workings. Because the underground workings lie 400 to 500 feet below the portal areas, the piezometric surface of the mine water would not be expected to rise to a level where it would intersect the ground sufface, thus causing discharges through the mine portals or shafts.