This statement assesses the environmental consequences of four alternative levels of coal development. The alternatives range from leasing 19 tracts to leasing 13 tracts, and also includes the No-Action Alternative. The No-Action Alternative includes three I-90 coal exchanges, two noncompetitive leases, and 67 PRLAs totaling 15 mine units. The statement assesses impacts that would occur in Big Horn, Powder River, and Rosebud counties in Montana and Campbell, Converse, Crook, Johnson, Natrona, Sheridan, and Weston counties in Wyoming, as a result of coal leasing and development; and, cumulative impacts from the I-90 exchanges, noncompetitive leases, and PRLAs.