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Revised April 5, 1985 <br />• the Twentymile Park ground water basin display artesian water levels, <br />and some flow water at the surface, as shown in Table 26, Ground Water <br />Monitoring Data contained in the Energy Mine No. 3, Permit C-84-062. <br />Specifically, monitor well nos. 08-77-42, OS-77-43 and 08-77-58, shown <br />on Map 4, Mine No. 3 Hydrology Map (also contained in Permit No. C-84- <br />062), display sufficient artesian head to flow at the surface. <br />Groundwater also occurs in unconfined alluvial aquifers in the <br />proposed permit area. The alluvium deposited by fish Creek contains <br />water in isolated pockets of sand and gravel beneath the streambed. <br />This ground water is derived from underlying bedrock aquifers, <br />irrigation return flow and surface runoff which infiltrates into the <br />alluvium. Several shallow wells have been installed in the unconfined <br />alluvial aquifers within the proposed permit and adjacent area. Depth <br />of the alluvium ranges from 8 to 35 feet and is generally less than 20 <br />feet, and depth to the water table is less than 10 feet, as shown in <br />• Table 31, Ground Water Monitoring Data. The extent of the <br />unconsolidated streamlaid deposits in the proposed permit and adjacent <br />area is shown on Map 5, Fish Creek Tipple Hydrology. <br />The lithology of the unconfined alluvial aquifers in the proposed <br />permit area is unconsolidated clay and sand, underlain by layers of <br />gravel. The thickness of the alluvium varies from 8 to 35 feet and is <br />generally less than 20 feet. These features are shown graphically on <br />Map 6, Fish Creek Tipple Stream Channel Cross Sections. <br />Known Uses of Ground Water <br />Groundwater in the proposed permit and adjacent area is used primarily <br />for agricultural purposes. Some wells are used for small industrial <br />supply, but none for municipal supply. The water supply wells <br />registered with the Colorado State Engineer's Office are shown on Map <br />5, Fish Creek Tipple Hydrology. As shown, the density of private <br />wells in the general area is sparse, due to low well yields and the <br />. rural population. Since no additional disturbance of the strata <br />containing the overburden aquifers existing beneath the proposed <br />2.04-21 <br />