GENERAL50503 - Laserfiche WebLink

Home Browse Search

4.05.13(1)(b). Monitoring data from both wells indicate the mine has not caused an exceedance of the Basic Standazds for Ground Water. Observed Surface Water Impacts Discharges from the 5 and 6 mines have not caused measurable depletion of stream flows in the mine vicinity. If all of the mine inflows during active mining (approxi- mately 2 cfs) came from the Williams Fork and Yampa Rivers, it would be too small of a depletion to detect in those rivers' 7-day/10-yeaz low flows. Monitoring data in the annual hydrology reports from 1981 through 2002 indicate the Eagle Mines have not significantly impacted the water quality of the Williams Fork River. G. No surface water is proposed to be discharged or directed into underground mine workings. H. RAG-EC does not plan to convert any monitoring welts to water supply wells. I. Stream Buffer Zones -Rule 4.05.18 The Eagle Mine Complex includes several structures which aze located within 100 feet of the perennial Williams Fork River. These structures aze a coal storage silo, a 48-inch cross country conveyor, waste water ponds, No. 5 Mine dewatering wells and associated substation and access road, haul road bridge, well 259 and pond HR-P1, and rail road at tail track end. The conveyor is an enclosed structure as it crosses the river and the highway, therefore minimizing disturbance to the stream. The coal storage silo is a concrete structure utilized to load railroad cars. These variances from the 100-foot buffer zone for perennial streams have been granted by the Division upon finding: 1) that the original stream channel will be restored; 2) during and after mining, the water quantity and quality from the stream section from within 100 feet of the surface coal mining operation shall not be adversely affected; and 3) that the operation's Reclamation plan provides for the reestablishment of the appropriate riparian vegetation. Locations of these structures are shown on Permit Map 26. Stream buffer exemption signs have been posted at appropriate locations. III. Topsoil Baseline soils information is presented in Section 2.04 and Exhibits 12 and 13 of the permit application. Maps 19 and 19a show the locations of the soil mapping units. The topsoil handling and management plan is given in Sectiori 2.05.3 of the permit application. Final reclamation plans, including soils information, is given for the Williams Fork Strip Pit in Exhibit 24. Topsoil stockpile locations aze shown on the structures and renewable resources map (Map 25). These locations aze verbally described on Tables 58 through 62. The permit azea has had a long history of surface and underground mining resulting in many areas of disturbance where no topsoil was salvaged. In other azeas, subsoil and 25