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• Baca Winter Wheat <br />Alfalfa <br />10.0 <br />0.5 <br />1980 Mixture (#3) <br />Revenue Slender Wheatgrass <br />2.0 <br />Oahe Intermediate Wheatgrass <br />1.5 <br />Luna Pubescent Wheatgrass <br />1.5 <br />Lincoln Smooth Bronle <br />2.0 <br />Nordan Desert Wheatgrass <br />0.25 <br />Sodar Streambank Wheatgrass <br />0.25 <br />Great Basin Wildrye <br />0.25 <br />Orchardgrass <br />0.125 <br />Timothy <br />0.05 <br />Kentucky Bluegrass <br />0.02 <br />Durar Hard Fescue <br />0.125 <br />Barton Western Wheatgrass <br />0.25 <br />Lutana Cicer Milkvetch <br />OS <br />Emerald Crownvetch <br />0.5 <br />Arrowleaf Balsamroot <br />0.01 <br />Small Burnet <br />0.5 <br />Sweetanise <br />0.5 <br />Alfalfa <br />0.25 <br />Mountain Big Sagebrush <br />0.025 <br />Antelope Bitterbrush <br />0.25 <br />• Lanceleaf Bitterbrush <br />0.25 <br />Planned disturbance to this community by surface <br />facilities will be vertical boreholes which will be <br />used to <br />dewater the underground mine, a chemical mixing <br />station, a settling pond, and a short access road. <br />Total <br />disturbance will be about 4.6 acres. A permanent <br />access road already exists for 6300 feet towards <br />the site. <br />Another 2500 feet of access road will be constructed <br />through this vegetation type. The Reclaimed <br />Pasture <br />Vegetation Type itself occupies 11.0 percent of the proposed permit area. <br />As identified on Table 32, Reclaimed Pasture Vegetation type, smooth brome (Bronlus inennis) and alfalfa <br />(Medicaeo sativa) dominate the community with 22.3% and 57.7% ground cover and 186.75 g/1112 and 230.46 <br />g/1112 productivity, respectively. Other significant species include intermediate wheatgrass (Agrooyron <br />intermedium) and yellow sweetclover (Melilotus officinalis) with 8.5% and 1.2% ground cover, respectively. <br />Total herbaceous stratum variables average 30.90% ground cover by grass and 59.00% ground cover by forbs, <br />258.73 g/m2 (2,308 lbs/acre) production by grasses and 230.46 g/n12 (2,056 lbs/acre) production by (orbs. The <br />reclaimed pasture's overall variables are 89.90% vegetative cover and 489.19 g/m2 (4,364 lbs/acre) production. <br />The diversity index as calculated by Shannon et al. (1973) for the entire community gives a value of 0.4023. <br />Reclaimed Pasture Vegetation Type variables as presented above were determined from statistically adequate <br />sampling. Sample parameters for each variable, and the minimum sample size required for an adequate sample <br />are presented in Table 27, Summary of Statistical Information. A reference area already has been established for <br />this vegetation type under CYCC's Permit No. 79-177. It is shown as R2, Pasture Reference Area, on Map 18, <br />Premining Vegetation. Prior to surface mining, this area supported a pasture vegetation type. The reference area <br />•for this site was established in 1980 and will continue to be used to measure revegetation success on pastureland <br />by both CYCC and TCC. Responsibility for the protection and management of this reference area will continue <br />under CYCC and TCC as required by State and Federal regulations. <br />MR 97-154 2.04-57 Revised 10/02/97 <br />