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. -19- • <br />h. ?robable H7drologic Consequences and Cinulative Impacts Assessment - <br />Rules 2.05.6(3) and ^. 07.6(2)(c) ('coa't) <br />The alluvial ground water s}•stem in East Salt Creek could be impacted as a <br />result of the surface disturbance in ?;cClane Cam•on. Any impact incurred. <br />howe~oer, would be a result o: the effect of the r.:ine on surface water. There <br />is ne ether mechanism for recharge of the alluvium which will be affected <br />by the operation. Furthermore, the potential for an effect on the alluvial <br />s}•stem as a result of alteration of the surface flow will be insignificant. <br />If the recharge of the aquifer were solely dependent on surface flow the <br />significance of the disturbed area c:ith respect to flow ir. the alluvium would <br />be negligible. <br />All waters which could be potentially impacted by the operation will be <br />monitored for ant- adverse impacts. Surface water monitoring sites are located <br />upstream and downstream of the disturbance so that any detrimental impacts <br />will be determined. Ground water alluvial wells have been established <br />upgradient and downgradient of ?ScClane Canvor. aior.g East Salt Creek to monitor <br />the effects of mining. Changes in flow and water quality parameters will <br />be measured at ail of these monitoring sites. <br />Salt Creek Mining Company also has applied for a permit to mine in yfunger <br />Cam•on, (see Mined Land Reclamation File :'.'C-020-fit) one mile south of <br />PfcClane Canyon. The mine is an underground mine with the face up and <br />facilities in a canyon at the headwater=_ of a tributary to Pfunger Can}•on. <br />The face up is located approximately two miles from the intersection of <br />Munger Canyon and East Salt Creek Canvo:;. <br />The Munger Canyon Pfine will also affect the quantity and quality of sur_`ace <br />water in East Salt Creek. This effect would occur as a result of the 'surf ace <br />disturbance at the mine and the impact this disturbance will have on run of` <br />and surface flow in Munger Canyon. <br />The total surface disturbance created b}• the '9cClane Canyon operation which <br />will be contained within a sedimentation system is approximately 7.7 acres. <br />This accounts for less than two-tenths of a percent of the area contained <br />within the Pfunger Canyon drainage (5,085 acresl, and one one-hundredth of <br />a percent of the total drainage area e` East Salt Creek above the confluence <br />with Plunger Canyon (67,32& acres). Sett,M.unger and ?!cClane Canyons (42.7 <br />acres) will only affect si>:-hundredths of a percent of the drainage area <br />of East Salt Creek. <br />As indicated, the combined, or cumulative, impact on flow in East Salt <br />Creek a_= a result of the operations at NcClane and ?iunger Cam+ons will be <br />relatively insignificant. Ail flow occurring outside of the disturbances <br />will be routed around them and returned to the drainage. Runoff producec <br />from the disturbed areas will be contained in sedimentation ponds for a <br />sufficient enough time to meet \PDES anc ?!ined Land Reclamation ef_`luent <br />standards, and c.•ill then be released into the drainage. <br />