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2.04.7 Hydrology Description <br />(4) A description of the maps prepared according to the standards of rule 2.10 <br />follows: <br />(4)(a) The locations of water supply intakes, ditches, reservoirs, and wells within <br />a one mile minimum radius of the affected area are shown on Map 18, <br />Water Rights Location. <br />Current users of surface water flowing into, out of, and within the <br />hydrologic area are the landowners who irrigate land west of Loma Drain <br />and North of State Highway 6 & 50. <br />(4)(b) The location of monitoring stations used to gather data for water quality <br />and quantity is shown on Map 8, Hydrologic Monitoring Location. The <br />elevation of the monitoring stations are tabulated in Volume I, Exhibit 3. <br />(4)(c) Subsurface water in the permit and adjacent area is located in the <br />saturated alluvial material overlying the low permeability Mancos Shale. <br />The Alluvial Valley Floor report located in Volume I, Exhibit 14 has a <br />pieziometric drawing of ground water in the permit and adjacent area. <br />(4)(d) See Map 8 Hydrologic Monitoring Location and Map 18, Water Rights <br />Location. <br />(4)(e) There are no existing areas of spoil, waste and non -coal waste in the <br />permit area. There are five existing evaporation ponds in the permit area. <br />They are referred to as evaporation ponds 4, 5, 6 & 7 and the coke fines <br />setting pond. Only a small sliver of the north end of evaporation pond 7 is <br />located in the permit area. The location of the ponds are shown on Map <br />19, Previously Disturbed Areas. <br />There is an acid - sludge waste cell area that is a mounded and soil- capped <br />square area, about 7 acres in size, near the site's northeast corner. The <br />waste cell contains approximately 85,000 cubic yards of solidified acid <br />sludge. <br />Permit Application 2.04 -28 04/11 <br />