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GENERAL43153
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Last modified
8/24/2016 8:11:57 PM
Creation date
11/23/2007 12:14:03 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
General Documents
Doc Date
7/5/1995
Doc Name
PROPOSED DECISION AND FINDINGS OF COMPLIANCE
Permit Index Doc Type
FINDINGS
Media Type
D
Archive
No
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A uif gFI SQL m 1 TDS (me/I) <br />Armand Draw Alluvium 7.5 632 (avg.) 816-1802 <br />Grassy Creek Alluvium 7.02-7.42 167-2517 546-4030 <br />Sage Creek Alluvium 6.7-8.3 <539 344-1146 <br />Lennox Coal 6.7-7 30380 920-1200 <br />Lennox Overburden 6.8-6.9 17901157 2030-6432 . <br />Wadge Overburden 6.5-8.8 99-1737 549-3052 <br />Wadge Coal"" > 12 <500 234-1232 <br />Wadge Underburden ~6.9-7.0 14-696 996-1550 <br />Wolf Creek Coal 6.9-8.5 346-416 904-988 <br />Trout Creek Sandstone 7.2-8.25 -412 -871 <br />Climate <br />The average annual precipitation for the town of Hayden, 8.5 miles northwest of the mine <br />site, is approximately 15.9 inches. Precipitation for Hayden is relatively uniform throughout <br />the year. The mean annual temperature is 42° F, with average maximum and minimum <br />temperatures of 66° F and 17° F, respectively. The predominant wind direction at the <br />Seneca II-W mine, located west of the Yoast Mine, is from the east-southeast. This <br />direction is in conformance with the topography at that site, and therefore may not be <br />indicative of expected wind directions at the Yoast Mine. The average wind speed at <br />Seneca II-W is 3.5 knots, with an average maximum of 15.4 knots, and an average minimum <br />of .17 knots. <br />Ve etg ation <br />Five major vegetation community types occur within the proposed Yoast permit area. These <br />major vegetation community types are: Mountain Brush, Sagebrush, Aspen, Steep Mountain <br />Brush, and Western Wheatgrass/Alkali Sagebrush. Additional community types occur within <br />the proposed permit area but at considerably smaller acreages. These additional vegetation <br />types include: Upland and subirrigated improved pasture, mesic drainage, lands in the <br />Conservation Reserve Program, cropland, Alkali Sagebrush/Greasewood, and Alkali <br />Meadow. <br />Shrub stands in the pre-mine landscape are dense and reduce the utility of the area for <br />livestock grazing. Pre-mine densities determined from baseline sampling data are:. 12,562 <br />stems per acre in the Mountain Brush community, 7039 stems per acre in the Aspen <br />community, and 6087 stems per acre in the Sagebrush community. All vegetation types <br />within the permit are characterize by cool season species. <br />Soils <br />The proposed permit site is located in an "ustic-aridic" soil moisture regime and a "cryic- <br />frigid "soil temperature regime. Moisture is limiting within these soils, but the soil moisture <br />Yoasl Min< 11 July 6, 1995 <br />
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