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There are no registered wells completed in [he Trout Crcek Sandstone in the central part of the Twentymile Park Basin except those owned by TCC. There are no registered wells completed in the Tvventvmile Sandstone in the central part of the Twenhmtile Park Basin. Groundwater rights in the permit area and vicinih• are shown in Table 9. In the unlikely event that underground mining activities cause adverse quantitative injun• to another +vater user, TCC or a subsidiary of TCC would utilize their ground water rights within the general area to mitigate any such injury. Know uses of ground water can be found under Rule 2.04,7(1)(a)(iii) starting on page 2.04-33. w) The qualih• of surface and ground water affected by anv underground mines by locatin>; mme openings in accordance with 4 _05.10, The mine portals are designed such that no gravity. discharge of water from the mine occurs. Water from the disturbed portal wedge area or rock slopes is routed to Pond E, or alternatively, it may be piped to Site 1 ]4. No ++~ater will be discharged by gravity from the Fish Creek Borehole/Shaft. (b) The description shall include: fi)____ A plan__for__contro] .jn__accordance writh..Rule 4,_of,surface_ground water drainage into, through and out of the proposed permit area and adjacent area: Drainaee Control and Treatment Plan Previous operations plans for the Foidel Creek Mine created certain changes in the original sediment-control plan implemented under the previously approved Permit No. 79-177. The most significant changes were a result of the variance from contemporaneous reclamation requirements to allow a portion of the surface mine pit in Area 2 to remain open and to serve as a disposal site for +vaste rock material from the underground mine. .Exhibit 31, Spoil Analysis, contains recommendations for drainage control near the portal area. As stated, the crest of the highwall is a topographic drainage divide, and surface drainage north of the crest drains away from the highwall (into Ponds, D, E, F and G, as shown on Map 24, Surface Facilities). This plan provides for drainage of the area south of the surface facilities utilizing two diversion ditches. Ditch D-4 is located at the tce of the spoils slope and Ditch D-3 at the crest of the spoil slope as shown on Map 24, Surface Facilities, and specified in Exhibit 8, Sediment Control Plan. Ditch D-3 is designed for [he 100-year, 24-hour precipitation event to provide a measure of safety and stability to the spoil slopes. All other drainage control measures are designed for the 10-year, 24-hour event. The plan calls for the Area 2 Pit water to be allowed to overflow into Pond D and release to Foidel Creek, as shown on Map 24, Surface Facilities. Thus, all v+•a[er from disturbed lands pass through sedimentation ponds before being released to Foidel Creek, except for small area exemptions. TCC has assumed the operational and reclamation liability for ponds/treatment facilih• B, C, D, E, F, G, and T since the completion of mining at Colorado Yampa Coal Compan}•. Pond B, which is a treatment facility, receives wash down water and surface runoff from the tipple and Belt-Out-Back stockpile. Pond C controls runoff from the old loadout stockpile and its associated pad. Pond D receives surface runoff, spoils discharge from Pit 2 and mine water./ Pond E receives runoff from the surface facilities, including surface water from the Wadge Sump Pond F receives runoff from the surface facilities, Gpland reclaimed area,~and spoil watei~Pond G receives run off from the surface facilities and upland reclaimed areas. The details of the ponds are presented in Exhibit 8. Additionally, TCC utilizes diversion ditches to route the 100 year flow event around the refuse pile. The design of the refuse pile diversion ditches is presented in Exhibit 26A, Appendix D. These diversions take upland slow and divert it around the perimeter of the refuse pile in accordance with the DMG regulations. TR99-32 2.05-130 ~p~~®VE~1 f:~ 0 g 2000 ]/3/00