1 3.3 Wyoming East Uranium Milling Region 3 3.3.1 Land
Description of the Affected Environment 1 3.3 Wyoming East Uranium Milling Region 2 3 3.3.1 Land Use 4 5 As shown on Figure 3.3-1, the Wyoming East Uranium Milling Region encompasses parts of 6 eight counties (Albany, Campbell, Carbon, Converse, Johnson, Natrona, Platte, and Weston), 7 although it predominantly lies within Converse and Campbell counties. This region straddles 8 portions of the Wyoming Basin to the east and the upper part of the Missouri Plateau to the 9 north (U.S. Geological Survey, 2004). In this region, past, current, and potential uranium milling 10 operations are generally found in the four-corner area of Campbell, Converse, Natrona, and 11 Johnson counties, (known as the Pumpkin Buttes District) and in the northern-central part of 12 Converse County (known as the Monument Hill District). The Shirley Basin Uranium District 13 located south of Casper is the past site of a conventional uranium milling facility (Figures 3.3-1 14 and 3.3-2). The geology and soils of these three uranium districts are detailed in Section 3.3.3. 15 16 While 53.3 percent of the land in Wyoming is federal and state public land, land ownership in 17 this region is predominantly private (68 percent) (Table 3.3-1). Within the Wyoming East 18 Uranium Milling Region there are portions of two large tracts of federal land that are managed 19 by the U. S. Forest Service (USFS): 20* 21 e The Thunder Basin National Grassland, which straddles Campbell, Converse, and 22 Weston Counties in the Powder River Basin between the Big Horn Mountains to the 23 west and the South Dakota Black Hills to the east, represents 15 percent of the region.
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