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GENERAL44630
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Last modified
8/24/2016 8:13:20 PM
Creation date
11/23/2007 1:11:03 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982055
IBM Index Class Name
General Documents
Doc Date
9/1/1998
Doc Name
Proposed Decision & Findings of Compliance for RN3
Permit Index Doc Type
FINDINGS
Media Type
D
Archive
No
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<br />Descrintion of the Environment <br />The mine site is located three miles south of Trinidad, Colorado in an azea characterized by <br />dissected plateaus. Elevation at the mine site ranges from 6400 feet to 6700 feet. Land use in <br />the area is classified as highland agriculture by local planning and land use officials. This use <br />basically comprises mountainous grazing and watershed protection. In the immediate azea of the <br />site, mining has been a previous land use. Evidence of these past mining activities can be found <br />in most of the small canyons in the azea. <br />Due to disturbances from past mining activities, use of the azea for grazing, proximity to the <br />town of Trinidad and proximity to a major highway (I-25), the utility of the azea as wildlife <br />habitat is somewhat limited. Lazge, undisturbed azeas lie to the south and east of the mine that <br />offer suitable habitat. However, following reclamation, indigenous species such as elk, mule <br />deer, and turkey aze frequent visitors to the reclaimed azea. <br />The Raton Creek Mine is located in the eastern limb of the Trinidad-Raton Basin syncline. The <br />coal seam to be mined (Lower Stazkville seam) occurs in the Vermejo Formation and dips to the <br />west three to four degrees. Some minor faults have been noted in old underground workings. <br />The Stazkville seam outcrops in the mine azea slightly above the Stazkville drainage. The Raton <br />Formation lies stratigraphically above the Vermejo Formation, and includes some coal seams of <br />minor importance. stratigraphically below the Vermejo Formation is the Trinidad sandstone, an <br />aquifer of regional significance. <br />The main mine facility is located in the Starkville drainage. This drainage flows only in response <br />to rainfall or snow melt. Stazkville Gulch drains into Raton Creek, which is tributary to the <br />Purgatoire River. <br />The region is characterized by a semi-arid climate. Prevailing winds aze from the southwest at an <br />average speed of ten knots. The mean annual precipitation is 15 inches. The growing season is <br />approximately 156 days. <br />Native soils are derived from the sedimentary materials which comprise the foothill slopes. The <br />soils on the side slopes of the mine site aze chazacteristically shallow, being derived from pazent <br />sandstone and shale layers which outcrop in the area. The soils aze neutral to slightly alkaline, <br />clay to clay-loam in texture, and have low concentrations of salts and organic water. Soil <br />mapping indicates soils of the Midnight-Rombo and Louviers-Rombo-Travessilla variety. Soils <br />neaz [he ephemeral drainage and at the mouth of [he drainage aze deeper and have a finer texture. <br />These soils aze of the Fort Collins and Limon- Gaynor mapping units. Textures of these soils <br />range from loam to silty clay loam with a neutral to slightly alkaline pH. <br />Two primary vegetative communities dominate the azea which has been disturbed by <br />mine-related activities. At the mouth of the ephemeral Starkville drainage (below 6400 feet) and <br />
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