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GENERAL53077
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Last modified
8/24/2016 8:38:45 PM
Creation date
11/23/2007 8:18:33 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981041
IBM Index Class Name
General Documents
Doc Date
12/1/1982
Doc Name
Proposed Decision and Findings of Compliance
Permit Index Doc Type
FINDINGS
Media Type
D
Archive
No
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-b- <br /> <br />• <br />Environmental Description (cont'd) <br />Three stratigraphic units can be considered as aquifers: the stratum above the coal <br />seam, the Cameo coal seam, and the Rollins Sandstone. The Roadside mine plan <br />area is up-dip of the Colorado River, and the Cameo mine plan area is down-dip of <br />the Colorado River. Therefore, the aquifers in the Roadside mine plan area <br />discharge water to the Colorado River, and the aquifers in the Cameo mine plan <br />area receive recharge water from the Colorado River. Additional information on <br />groundwater can be found in Section VI of this document. <br />The Colorado River splits the permit area and the Cameo and Roadside mine plan areas. <br />The Colorado River is the only perennial stream that flows through the permit area. <br />Three ephemeral drainages, Coal Creek, Jerry Creek and an unnamed drainage, ate <br />present on the Cameo mine permit area. The Roadside mine will undermine two <br />intermittent streams; Rapid Creek and Cottonwood Creek. Additional surface water <br />hydrology information can be found in Section V of this document. <br />Soils in the general area are commonly high in sodium and, occasionally, saline. <br />This is reflected in the sparse vegetation in the surrounding area. Variability of <br />the characteristics of the soils on the permit area is primarily due to slope, <br />aspect and topography. Deeper soils (greater than 60 inches) are located in the <br />valley bottoms and the shallower soils (0-40 inches in depth) occupy the side slopes <br />of the canyons. Further information on soils can be found in Section X of this <br />document. <br />The permit area receives Less than 9 inches of precipitation annually and is <br />characterized by moderately cold winters and warm stmm~ers. January and July <br />temperatures average 27 degrees and 79 degrees respectively. The mesas and slopes <br />at the base of the canyons in the area support sparse salt desert vegetation, <br />including grasses such as galleta (Rilaria jamesii), Indian ricegrass (Oryzopsis <br />hymenoides) and squirrel tail (Sitanion hystrix), and shrubs such as winterfat <br />(Ceratoides lanata), shadscale (Atriplex confertifolia) big sagebrush (Artemisia <br />tridentata) and fourwing saltbush (Atriplex canescens). The riparian zone adjacent <br />to the Colorado River supports a variety of grasses, shrubs and trees, including <br />willows (Salix ~.). Cottonwoods (populus ~.), salt cedar (Tamarix ~rviflora) <br />and bluegrass (POS ~.). Further information on vegetation can be found in <br />Section XZ of this document. <br />Canyon walls in the permit area provide potential raptor nesting sites and the river <br />is used by waterfowl during migration, wintering and nesting seasons. The nortb- <br />western portion of the permit, several miles from the surface facilities, provides <br />winter range for mule deer and the western third of the Cameo mine permit is part <br />of a Federal government or State-designated wild horse management area. Additional <br />information on fish and wildlife can be found in Section XIZ of this document. <br />Mining and Reclamation Plan <br />Room and pillar and longwall mining methods are to be used in recovering the mineable <br />coal reserves within the permit area. The majority of the mining during this five <br />year permit term will be room and pillar. Mining during future permit terms is <br />planned to be dominantly longwalZ. The anticipated annual production from both mines <br />is 1,100,000 tons of clean coal. The wa1 seam to be mined varies from four feet in <br />thickness to a. maximum of 11 feet. Room and pillar panels will 'be typicallg <br />developed using a five-entry system and longwall panels will be typically developed <br />by a two-entry system. <br />~~ 111~1.~ t i <br />
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