2008-06-23_APPLICATION CORRESPONDENCE - C2008086

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• 2.04.7 Hydrology Description 7. Munger Creek - East Salt Creek Tributary Stockponds Within Permit and Adiacent Area: Numerous stock ponds, all having a storage volume less than 20 acre-feet, have been identified within the permit and adjacent area. These ponds are man-made and historically serve as stockponds. The ponds are sited to collect run-off during the spring season. Although the ponds are a significant hydrologic feature of the permit and adjacent area and their existence is currently important to domestic animals and wildlife, total contribution of these ponds to the local water budget is not significant. There are 23 inventoried ponds in the permit and adjacent area. The ponds are numbered 1 through 23 as shown on Map 9. The embankment on four of the ponds has been washed out so they have not been monitored. • One quality sample and two field samples have been obtained from Pond 6 which is located near the wash plant and clean coal stockpile area. The pH varied from 7.1 to 9.6 su. The conductivity was less than 1,000 umhos/cm. Ruby Lee Reservoir is located approximately one mile southeast of the permit boundary. It is fed by ephemeral channels and ditches from Big Salt Wash. Ruby Lee Reservoir is decreed for 367 acre-feet of storage. This reservoir is below the coal seam to be mined so it will not be undermined. Springs Within Permit and Adjacent Area Springs in the permit and adjacent area have been mapped and described based on data available from the BLM GIS data base, a URS hydrogeologic field reconnaissance of the mine facilities area, and historical information collected for Dorchester Coal Company. Detailed spring and seep surveys were conducted in 1982 and 1983 for the Fruita Mine permit application, which was for the mine proposed by Dorchester Coal Company in 1984, but never started. Map 9, Hydrologic Monitoring Location Map, shows the location of the springs. Permit Application 2.04-30 06/08