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-IB- VII. Cumulative X rolo is Im acts (cont'd) • Presently, there is only one surface water monitoring station located on Rapid Creek near the lower end of the permit area. More than one station is needed in order to monitor effects on Rapid Creek and Cottonwood Creek, therefore, the following stipulation is necessary. STIPULATION No. 4 THE PERMITTEE MUST SUBMIT AN APPROVABLE SURFACE WATER MONITORING PLAN BY NO LATER THAN JANUARY 28, 1983 FOR RAPID CREEK AND COTTONWOOD CREEK. THE MONITORING SYSTEM MUST BE INSTALLED RND OPERABLE BY MARCH 7, 1983. THE SURFACE WATER MONITORING PLAN MUST INCLUDE, AT A MINIMUM, THREE GUAGING STATIONS; ONE DOWNSTREAM OF THE PERMIT AREA, AND TWO STATIONS UPSTREAM OF THE PERMIT AREA; ONE ON RAPID CREEK AND ONE ON COTTONWOOD CREEK. THE MEASURING DEVICES MUST BE SIZED TO SHOW SEASONAL FLOW VARIATIONS AND MUST PROVIDE ACCURATE MEASUREMENT DURING THE LOW FLOW PERIODS. THE GUAGING STATIONS MUST BE EQUIPPED WITH CONTINOUS RECORDERS, AND THE DATA MUST BE SUBMITTED TO TXE DIVISION ON A QUARTERLY BASIS. As previously stated, in the absence of subsidence, there should be no significant effect on the flow in Rapid Creek and Cottonwood Creek. However, in the unlikely event that surface flows were depleted through natural fractures or subsidence related fractures, the applicant would be required to mitigate the effects from mining. The applicant has supplied no contingency plan, therefore, the following stipulation is necessary. STIPULATION No. 5 THE PERMITTEE MUST SUBMIT A CONTINGENCY PLAN BY NO LATER THAN JANUARY 28, 1983, DESCRIBING THE MEASURES THAT WOULD BE UNDERTAKEN BY THE OPERATOR TO PROVIDE WATER TO DOWNSTREAM USERS IN THE CASE THAT THE SURFACE AND GROUND WATER MONITORING INDICATE TXAT THE PIZNING OPERATION IS HAVING AN ADVERSE EFFECT UPON THOSE USERS. In addition, if the proposed mining operation does deplete the flow in Rapid Creek and Cottonwood Creek, the water in the alluvial aquifer would also be depleted. This would not be immediately discernable from surface water monitoring or from inflow monitoring in the mine. Therefore, a properly installed set of monitoring wells may be necessary. The monitoring wells would, in a very short time, indicate whether increase mine inflows were due to depleting a perched aquifer or were due to depletion of the alluvial ground water. This is particularly important since an existing alluvial well used for domestic water is located downgradient of the permit area. Since the applicant has made no provisions for monitoring the alluvial aquifer of Rapid Creek and Cottonwood Creek, the following stipulation is necessary. STIPULATION No. 6 BY MARCH 7, 1982, THE PERMITTEE MUST EITHER SUBMIT AN ACCEPTABLE PLAN TO TXE DIVISION FOR MONITORING THE EFFECTS OF MINING ON TXE ALLWIAL GROUND WATER OF RAPID CREEK AND COT~NWOOD CREEK OR SUBMIT A PLAN FOR THE INSTALLATION OF MONI~RING WELLS IN TXE ALLWIUM OF RAPID CREEK AND COTTONWOOD CREEK. THE PLAN FOR MONI~t7R LNG WELLS MUST INCLUDE A MAP SNOWING THE LOCATION OF TXE WELLS RND THE PROPOSED UNDERGROUND WORKINGS. A TIMETABLE FOR INSTALLATION OF THE WELLS MUST ALSO BE SUBMITTED. THE MONITORING WELL SYSTEM MUST INCLUDE, AT A MINIMUFf, TWO 41ELLS EACH IN TXE COT4CJNWOOD AND RAPID CREEK ALLWZUM DIRECTLY OVER PROPOSED MINE WORKINGS. AT EACX LOCATION, TXE WELLS MUST BE COAfPLETED TO BEDROCK. ONE WELL AT EACH LOCATION WILL CONTAIN PERFORATED CASING THf20UGHOUT ITS ENTIRE DEPTH AND THE SECOND WELL AT EACH LOCATION WILL CONTAIN PERFORATED CASING ONLY IN THE LOWERMOST PORTION QF TH~ ALLWiUM H 1,