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• permeable layers. The Wadge Seam locally produces water due to <br /> fracture permeability. The strata of ailtstone and sandy shale <br />betveen the Lennon and Wadge coal seams have sufficient vertical <br />permeability to transmit water betveen the most conductive layers. <br />These layers as a whole comprise the overburden aquifer. Although <br />the thiclmesaes of these layers may vary slightly, the lithology and <br />hydraulic characteristics of the overburden aquifer are consistent <br />over the proposed permit and adjacent areas. <br />The lithology of the unconfined alluvial aquifers in the <br />proposed permit area is unconsolidated clay and sand, underlain by <br />Layers of gravel. The thiclmess of the alluvium varies from 8 to 35 <br />feet. These features are show graphically on Map 17, Mine No. 3 <br />• Stream Channel Cross Sections. <br />Rnow Oses of Ground Water <br />Groundwater in the proposed permit and adjacent area is used <br />primarily for agricultural and domestic supply. Some yells are used <br />for small industrial supply, but none for municipal supply. The <br />water supply yells registered with the Colorado State Engineer's <br />Office are show on Map 4, Mine No. 3 Hydrology. Aa shown, the <br />density of private yells in the general area is sparse, due to low <br />well yields and the rural population. <br />Aquifer Characteristics <br />. The overburden aquifer has been tested at several locations in <br />the proposed permit and adjacent area for yield and hydraulic <br />2.04-39 <br />