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The rock strata within the permit and mine plan areas dip uniformly to <br />the northeast at 2 degrees. No faults have been identified in the permit <br />and mine plan areas of the Munger Canyon Mine, but two high angle faults <br />form a graben structure into which the adjacent McClane Canyon Mine is <br />developed. These faults may contribute to the equilibrium of ground <br />water levels in the bedrock aquifers in the region. One set of entries <br />in the McClane Canyon Mine encountered a fault on the south side of the <br />graben structure in July of 1982. The fault produced water which reached <br />a peak inflow rate of approximately 5.4 gpm during February of 1983. <br />Since that time, the inflow rate has decreased to about 1.6 gpm recorded <br />during the first quarter of 1985. <br />Minor unmapped faults may be encountered by the mine at a future time and <br />produce mine inflows. In order to monitor the effect of the operation on <br />ground water resources and to assist in the prediction of hydrologic <br />impacts of future permit terms, the following stipulation is required: <br />Stipulation No. 3 <br />THE APPLICANT MUST SUBMIT TO 7HE REGULATORY AUTHORITY AN ANNUAL REPORT <br />CHARACTERIZING THE INFLOWS, DISCHARGES AND THE CONSUMPTION OF WATER <br />WITHIN THE MINE. THIS REPORT IS TO INCLUDE A CURRENT MINE WORKINGS MAP <br />SHOWING THE LOCATION AND QUANTITY OF INFLOWS: A TABLE KEYED TO THE MINE <br />MAP WHICH SHALL CONTAIN THE SOURCE (i.e., FAULTS, FRACTURES, ETC.), <br />QUANTITY, DURATION, AND QUALITY (i.e., pH, ELECTRO-CONDUCTIVITY AND <br />TEMPERATURE) OF ALL NON-SEEP INFLOWS; A TABLE CONTAINING RECORDS OF WATER <br />DISCHARGED FROM THE MINE, CONSUMED IN 7HE MINE AND IMPORTED FOR USE <br />WITHIN THE MINE; A DISCUSSION OF THE WATER BALANCE WITHIN THE MINE; AND, <br />A PROJECTION OF HYDROLOGIC IMPACTS OF MINING IN THE UPCOMING YEAR. <br />An alluvial ground water aquifer has been identified along East Salt <br />Creek. Monitoring wells established in the alluvium indicate that <br />alluvial water levels fluctuate seasonally in response to flow in East <br />Salt Creek, which in turn fluctuates primarily in response to flow in <br />tributary ephemeral streams. Data collected by the applicant from the <br />Salt Creek alluvial aquifer thus far indicate a sodium system, as would <br />be expected. No significantly adverse affects on ground water resources <br />are anticipated from the proposed underground mining activities. <br />Salt Creek Mining Company intends to monitor this aquifer upstream of <br />McClane Canyon and downstream of Munger Canyon to identify any effects <br />from mining. <br />The permit application contains East Salt Creek alluvium baseline ground <br />water monitoring data for three calendar quarters of 1981. In order to <br />accurately determine seasonal fluctuations and describe the essential <br />hydrologic functions of the East Salt Creek AVF, the Division required a <br />continuous record of alluvial ground water levels and water quality <br />data. <br />Stipulation 4 was attached to the permit during Permit Revision No. 1 in <br />1985. This stipulation was complied with with the operator's submittal <br />of Technical Revision 04 on January 17, 1986, plus the operator's <br />submittal of an additional year of baseline groundwater monitoring of <br />alluvium near the permit area on March 30, 1987. <br />-26- <br />