GENERAL35100 - Laserfiche WebLink

Home Browse Search

Horst and graben faulting has divided the permit area into three fault blocks. Each fault block runs to the northwest and the coal dips 10 degrees also to the northwest. During the Permit Renewal No. 1 application, Sunland Mining Corp. decided to forego coal extraction in Fault Block No. 3; therefore, mining occurred only in Fault Blocks Nos. 1 and 2. No acid- or toxic-forming materials were identified in the roof and floor analysis. Water that does come in contact with the roof and floor will be slightly sodium-sulfate in nature. Information pertaining to regional and site-specific geology is presented on pages 24-49 of the permit application. Surface Water Hydrology The permit area lies on the drainage divide between Trout Creek and Middle Creek. They are both perennial screams which flow in a northeasterly direction into the Yampa River. Trout Creek receives the drainage from the facilities area and forms the southeast boundary of the disturbed area. The drainage basin for Trout Creek above the mine includes an area of approximately 33 square miles. The runoff from the disturbed area of 5.6 acres constitutes less than 0.027% of the total flow of the stream. The runoff from the disturbed area is, therefore, insignificant to the flow of the stream. Surface water monitoring sites have been established both upstream and downstream of the mine on Trout Creek. Because of problems encountered with right-to-enter immediately downstream of the mine, Sunland Mining Corp. obtained permission to use monitoring information collected by the Pittsburgh & Midway Coal Mining Company for the Edna Mine (Permit C-80-001), which is located approximately one mile downstream. During the original permit application review, the Division was concerned with the close proximity of facilities area to Trout Creek. An analysis of the potential for this area to be flooded was performed by Gingery & Associates on behalf of Sunland. The results from this analysis show that even during the 100-year event, the facilities pad will not he flooded since Sunland Mining Corp. previously elevated this area. All drainage from disturbed areas with the exception of two small area exemptions, is routed to the sediment pond, located in the facilities pad adjacent to Trout Creek. The two small area exemptions were the previous locations of the office trailer/ parking lo[ and the reclaimed fan portal. These areas are .35 and .OS acres, respectively. The sediment pond had been installed per the regulations and was so certified. This pond has never discharged. Information pertaining to surface water hydrology is presented in Sections 2.04.7 (pages 50-57.22) and 2.05.3(4) (pages 130-179.31) of the permit application. Apex No. 2 Mine, C-81-011 5 May 5, 1993