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• sampling program are presented in the Annual Reclamation and Hydrology Reports <br />beginning in 1983 to the present. <br />As discussed In Section 2.05.4, Colowyo will use various surface manipulation techniques on <br />the topsoil after its redistribution as one method to prevent excessive wind or water erosion. <br />No special treatment of coal processing waste is necessary since none will be produced. See <br />Section 4.10 and 4.11. <br />With a few exceptions, Colowyo plans to have al] surface runoff from the disturbed azea pass <br />through sedimentation ponds. Sedimentation ponds are discussed in detail under Section <br />4.05.6, and their location is shown graphically on the Hydrology -South Map (Map 12) and <br />the Hydrology -North Map (Map 11). <br />Exceptions include such areas as topsoil stockpiles located outside of the Section 11 ditch <br />(MR-15), topsoil stockpiles located along the paved haul road (MR-18), East Taylor holding <br />pond and pump station (TR approved on November 1984). Erosion and sediment control is <br />achieved by protection with vegetation or rock. The demonstration presented in MR-18 <br />provides a representative example of how vegetative cover can provide for sediment control. <br />All Small Area Exemptions are shown on Maps 11 and 12. Other historic disturbances, such <br />as the outslopes of the rail spur cuts and fill and raw and potable water pipelines are not <br />considered Small Area Exemptions because they have been properly engineered, are <br />revegetated, and aze managed by best available practices. New small area exemptions will be <br />• individually approved prior to construction; this will typically require a demonstration or <br />model showing that effluent limitations of Rule 4.05.2 can be meet and that the applicable <br />State and Federal water quality requirements for downstream receiving waters are achieved. <br />The Administration and Security buildings have associated paved parking areas which <br />generate no sediment. <br />Colowyo employs various methods to manage water which periodically collects internal to <br />the mining operation and does not reach sedimentation ponds. various sumps, ditches, pumps, <br />hoses and pipes, etc. will be employed to control water within pits and/or route water <br />between pits. The ultimate destination of such water will be for operation's use (dust control, <br />etc.), evaporation or seepage into the backfilled spoil areas. <br />In addition to the mining, reclamation and treatment methods described and referenced in this <br />Section, further protection of the hydrologic balance will be established by an on-going plan <br />for monitoring potential changes in surface water quality and quantity and groundwater <br />quality. This monitoring plan is described under Section 4.0-5.13 and the monitoring <br />locations are graphically shown on Water Monitoring Sites for Permit No. CO-019-81 (Map <br />37). Excess spoil valley fill areas are located downdip of mining and reclamation areas and <br />periodic monitoring for seeps and springs and periodic monitoring of piezometer wells will <br />detect the formation of spoil springs. <br />L J <br />4.05-2 Revision Date: 11/17/05 <br />Revision No.: MR-75 <br />