Laserfiche WebLink
TAB 6 <br /> ATTACHMENT 6-1 <br /> NUCLA EAST GEOLOGY <br /> The physiography and regional geology including structure and stratigraphy are discussed <br /> in detail in Tab 6. The following site specific geologic information is presented for the <br /> Nucla East study area. <br /> Site Specific Geology <br /> For a period of more than 23 years, Peabody Coal Company has gathered and analyzed <br /> detailed information on the geology of the Nucla Mine located about one mile north of the <br /> Nucla East permit area. This information includes a program of high density exploration <br /> drilling, geologic mapping, topographic mapping, aerial photography, field investigations, <br /> and ground water quantity and quality data. A comprehensive description and analysis of <br /> this information in addition to site specific Nucla East data will provide background <br /> information for ground water and surface water hydrology, soils, and revegetation sections <br /> covered later in this permit application package (PAP). <br /> Topography. Peabody Coal Company's Nucla East permit area is located one-half to one and <br /> one-half miles west of Nucla in Montrose County, Colorado. In relation to regional <br /> drainage systems, the study area is located in the upper reaches of Calamity and Tuttle <br /> Draws, tributaries to the San Miguel River. <br /> Surface elevations within the permit area range from a high of 5,775 feet (MSL) in the <br /> northwest part near the Calamity-Tuttle Draw divide, to a low of about 5,645 feet (MSL) in <br /> the southwest part along Calamity Draw (see Exhibit 6-7). Total topographic relief for <br /> the permit area is 130 feet (MSL). <br /> Topographic features within the permit area include gentle southwest facing slopes; gentle <br /> rolling upland hills and ridges; old terraces, benches, and mesas; and shallow drains <br /> (ephemeral) and sloughs which feed Tuttle Draw (perennial). <br /> Bore Hole and Core Hole Analysis. Appendix 6-1 contains numerous lithologic and <br /> geophysical drill logs for the permit area which show and describe the lithologic <br /> characteristics and thickness for each coal seam and associated strata. The location and <br /> 6-1-5 Revised 04/11/88 <br />