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One set of entries has encountered the. fault on the south side of the <br />(; ;, ) graben. This fault produced water, but did not interfere with mining <br />~`».`:/ operations. The predicted ground water zone of saturation will be <br />encountered again during this permit term, In order to monitor the <br />effect of the operation on ground water resources and to assist in the <br />prediction of hydrologic impacts of future permit terms, a condition for <br />ground water monitoring was required by Colorado MLRD. <br />Alluvial Valley Floors <br />An alluvial ground water aquifer has been identified along East Salt <br />Creek. Monitoring wells established in the alluvium indicated that <br />alluvial water levels fluctuate seasonally in response to water flow in <br />East Salt Creek. Data collected by the applicant from the Salt Creek <br />alluvial aquifer thus far indicates a carbonate-sulfate water type, <br />similar to the chemistry of the surface water in this area. No <br />significant adverse effects on ground water are anticipated by this <br />operation, but a condition for ground water monitoring was required by <br />Colorado MLRD to confirm this conclusion. <br />An area of irrigated cropland is located on the East Salt Creek alluvial <br />valley floor approximately 1/2 mile downstream of HcClane Carryon. <br />Irrigation occurs through a series of diversion ditches carrying the <br />surface flow to various parts of the field. The essential hydrologic <br />__ functions for this portion of the alluvial floors are related to surface <br />fhow and- not-Eo-snbiziigatioh-'and=ether-ground-tiat~flows~ _ _ <br />_~~ __ ~ Salt Creek Mining Company is securing annual production data from the <br />~_:• <br />rancher downstream of this operation. This data is to be considered as <br />secondary to the water monitoring program for determining effects of <br />mining upon farm production because fluctuations in annual production can <br />also result from factors which are independent of the mining operation. <br />Colorado.MLRD found that the proposed surface coal mining operations <br />would not interrupt, discontinue, or preclude farming on an alluvial <br />valley floor. <br />/'~ lUG~ <br />`1 ~ <br />,~ ~~~' <br /> <br />these soils are suitable for use in reclamation of the mine. The <br />applicant stripped the Nihill Loam soil to a depth of 12 inches and the <br />Rivra Variant t th of 18 inches. <br />art of this topso <br />spread over one acre of t e mrne nch and the rest will be spread over <br />the disturbed area of the sediment pond. <br />S ait~lJLP S E ~o ~~ m i n i m a wt ~f P'rH-- <br />-s- <br />