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-36- <br />Transbasin Diversions 1,000 1,000 <br />Total 72,000 23,000 <br />Outflow <br />AET 31,000 22,000 <br />Irrigation Djtches 15,000 15,000 <br />Total 46,000 37,000 <br />Change in Storage ~l~ 26,000 -14,000 <br />s <br />1 Includes inflow and/or outflow of ground water. <br />In Summary, the hydrologic consequences of surface mining during the <br />first five year permit term are expected to be minimal. The applicant <br />reports that no degradation of water quality in surface streams is <br />expected. Any effluent will be treated as necessary to meet quality <br />standards prior to discharge. The applicant has not considered the <br />possibility of increased total dissolved solids because of pond . <br />detention. However, due to the small pond volumes, limited mine <br />discharge, and high dilution resulting from the North Fork River, a <br />measurable impact is not anticpated. The following stipulation is <br />required: <br />Stipulation No. 7 <br />THE APPLICANT',S QUARTERLY MONITORING REPORTS SHALL CONTINUE TO INCLUDE <br />QUALITY AND QUANTITY MONITORING OF ALL DISCHARGES FROM THE MINE SITE. <br />WATER QUALITY MONITORING SHALL CONSIST OF THE EFFLUENT LIMITATIONS PLUS <br />TOTAL DISSOLVED SOLIDS. <br />The operation has been experiencing minor amounts of mine inflows. <br />Total sustained inflows for 1984 were estimated at 6.4 acre-feet. Only <br />two general areas of sustained inflows are observed, both are in the <br />vacinity of the Sylvester Gulch return. Some of this water was used or <br />evaporated in the mine, however, most of it was discharged out of the <br />mine for treatment in the sedimentation pond. WECC's primary water <br />source within the mine is not mine inflows, rather it is a sepaate <br />source from their water impoundment. This impoundment contains water <br />withdrawn from the North Fork when WECC's water rights are in <br />priority. The small amount of mine water inflows experienced to date <br />are of such a small quantity that any discharge from the sedimentation <br />control system will result in a very large dilution with runoff water. <br />This results in negligable affects on the receiving stream from mine <br />inflows. <br /> <br />