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-14- IV. Geoloav - Rule 2.04.5 and 2.04.6(1 [he geology sections of the permit application can be found in Volume I, pages 2.04-11 through 2.04-30. Ndditional overburden analyses were submitted on September 30, 198'2 and October 7, 1982. Geologic Maps and cross-sections for the permit and adjacent areas are in Volume II, Maps 5 and 6. The mine site is located within the Walsenburg Coal Field which is located on the northeastern edge of the Raton Structural Basin. The coal beds in the permit area strike N 20o W and dip 2 to 5 degrees to the west-southwest. Several low displacement faults transect the permit area. These faults trend in a northeast-southwest orientation. The strata exposed in the general area of the Colorado L"oal Mine No. 1 consist of sedimentary rocks of Tertiary and Cretaceous age and Tertiary volcanic intrusive rocks. The sedimentary rocks are divided into the Poison Canyon and Raton Formations of Tertiary age and the Uermejo Formation, Trinidad Formation and Pierre Shale of Late Cretaceous origin. H11 of the coal seams which will be mined are contained in the Vermejo Formation. There are six minable coal seams in the Vennejo Formation. These are the Upper Robinson, Lower Robinson, Pryor, Walsen, Lennox, and Cameron. Volcanic sills, dikes and plugs have locally coked the coals in place. Thirteen inactive underground coal mines are located within and adjacent to the Colorado Coal Mine No. 1 permit area. The workings of these mines are within the Lower Robinson, Lennox and Cameron coal seams (See Table 2, Volume I of the application). Some of these coal seams and their associated roof and floor strata are toxic. The toxic nature of these strata is evident from 1) the lack of vegetative cover on old coal refuse piles, 2) the toxic and deyraded quality of ground water in flooded mine workings, and 3) the overburden analyses submitted by the applicant. Further discussion of overburden toxicity is contained in the sections of this permit document entitled "Backfill and Grading", "Hydrologic Balance - Ground Water", and "Coal Processing Waste". The Division finds that the applicant has submitted sufficient geoloyic information to be in conformance with the requirements of Rules 2.04.5 and Z.U4.6(1). V. H drolo is Balance: Surface Water - Rules 2.04.5, 2.04.7, 2.05.3 4 2.05.6 3 and 4.05 Surface water information is located on pages 2.04-44 and 2.04-45 of Volume 1 of the application. Sediment and drainage control plans are presented on pages 2. U5-13 through 2.05-22, and 4.05-3 through 4.05-7 of Volume 1 of the permit application.