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No acid- or toxic-forming materials were identified iri the roof and floor analysis. Water that does come in contact with the roof and floor will be slightly sodium-sulfate in nature. The operation is in compliance with the requirements of this section. V. Surface Water Hydrology - Rules 2.04.5, 2.04.7, an 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. The permit area lies on the drainage divide between Trout Creek and Middle Creek as shown on Map 2 of this document. These are both perennial streams 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 heen established both upstream and downstream of the mine nn Trout Creek., Because of problems encountered with right-to-enter immediately downstream of the mine, Sunland obtained permission to use monitoring information collected by the Pittsburgh 8 MiAway Coal Mining Company for the Edna Mine (Permit C-80-001), which is located approximately one mile downstream. The approved monitoring plan is presented on page 65.06 of the permit application. During the original permit application review, the Division was concerned about the facilities area due to its close proximity to Trout Creek. An analysis of the potential for this area to be floc+ded was performed by Gingery 8 Associates nn behalf of Sunland. The results from this analysis show that even during the 100-year event, the facilities area will not he flooded since Sunland previously elevated this area. All drainage from disturbed areas is routed to the sediment pond, located in the facilities area ad,iacent to Trout Creek, except for the mine fan installed at the old Apex No. 1 Mine area. The drainage from this mine fan is very minor and cannot be routed to the sediment pond. Due to the miniscule size of the area involved and since disturbance originally occurred in the early 1900's, the Division has granted a small area exemption for the fan at the Apex No. 1 Mine pursuant to Rule 4.05.2(3). The sediment pond has been installed per the regulations and was so certified. This pond has never discharged during the initial permit term. The operation is in compliance with the requirements of this section, -9-