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Several small water impoundments are found within the permit and adjacent areas as shown on Permit Renewal <br />Maps 9A. Hydrologic Features/Sediment Control, and 10A, Hydrologic Features. Potential locations for Livestock <br />.Water Tanks are depicted on Map 9A, Hydrologic Features/Sediment Control. The locations of the tanks are <br />updated annually at the end of February. <br />Mining at the Eckman Park operation did not occur within the floodplain areas of major drainages. Potential <br />impacts to surface water quality and quantit}' results indirectly from effects of runoff and groundwater discharge <br />from disturbed lands adjacent to [he major creeks. <br />Potential Mining-Related Impacts on Surface Water puantity and Quality <br />The mining and related operations have the potential to affect the volume and timing of discharges, water <br />cltentistr}', and suspended and dissolved solids concentrations of surface water in Foidel Creek and downstream <br />drainages. Avery minor effect ott water quality in Fish Creek could potentially occur due to changes itt <br />groundwater quality in the Wadge Overburden aquifer, which supplies a small proportion of the Fish Creek <br />baseflo++'. <br />.Temporary impoundment of surface runoff in sedimentation structures may result in minor variations in [he timing <br />and the +'ohnne of surface water discharges in Foidel Creek. Typically, the detention time required to achieve <br />effective sediment control +vill result in a mirror extension of the period of active flow in Foidel Creek and a <br />reduction in peak-flow volumes. In addition, periodic discharge during dry periods of any water impounded in <br />sedimentation structures will result in intermittent, low-volume flows. <br />Altltottgli the mining attd reclamation operations were designed to minimize disturbance, activities +vlticlt invol+'ed <br />surface disturbance ma}' result in increased levels of dissolved and suspended solids in area runoff. Tlie potential <br />impacts on surface water quality are limited somewhat by [he prevailing semi-arid climate and resulting low- <br />a+'eraee annual runoff rate. <br />The other major source of potential impacts to surface water quality is groundwater discharge from backfilled <br />areas. The water quality of <br />• <br />1996 Permit Ren. Permit Renewal 780-144-6 Revised 3/18/97 <br />