2020-06-08_REVISION - C1982057 (31)

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BRB-1 Phase III Bond Release 55.5 16.9 32 16 1.309 Area 2018 A' RA 2018 69.0 21.6 20 18 1.328 MB' RA 2018 47.1 11.0 15 13 1.354 SB' RA 2018 39.5 9.97 21 12 1.325 SMB' RA 2018 25.2 5.97 18 10 1.333 WW/AS' RA 2018 43.6 11.0 19 12 1.330 BRB-1 Phase III Bond Release 72.3 20.5 32 14 1.309 Area 2019 A' RA 2019 75.5 19.7 20 13 1.328 MB' RA 2019 41.9 12.3 17 16 1.337 SB' RA 2019 39.5 10.8 20 14 1.328 SMB' RA 2019 25.2 9.89 17 28 1.337 WW/AS' RA 2019 37.3 14.8 22 28 1.323 ' Reference Area Types (RA): A= aspen, MB =mountain brush, SB = sagebrush, SMB = steep mountain brush, WW/AS =western wheatgrass/alkali sagebrush 2 See text below for statistical measure to address sample adequacy and use of adjusted Steep Mountain Brush& Western Wheat data for 2019 success evaluations. 2018 Cover Success Evaluation Calculation of the cover performance standard for 2018 sampling data, and using the highest possible value for the Steep Mountain Brush reference area component as described above,is demonstrated below. Aspen Reference Area Allowable All-Hit Herbaceous Cover' = 69.0% Mountain Brush Reference Area Allowable All-Hit Herbaceous Cover' =41.7% Sage Brush Reference Area Allowable All-Hit Herbaceous Cover' = 39.5% Steep Mountain Brush Reference Area Allowable All-Hit Herbaceous Cover' =25.2%2 Western Wheatgrass/Alkali Sagebrush Ref. Area Allowable All-Hit Herbaceous Cover' = 43.6% 'Herbaceous cover adjusted to allowable by subtracting noxious weeds and annual/biennial plant cover in excess of 10%of the remainder. The Calculation of 90% of the 2015 Cover Standard= 0.90*[0.110(69.0%)+0.3 54(41.7%)+0.313(39.5%)+0.128(25.2%)+0.104(43.6%)] =37.9% The mean allowable all-hit herbaceous cover for the BRB-5 sampled in 2018 was 55.5 percent exceeding the cover standard of 37.9 percent(90 percent of the upwardly adjusted cover performance standard) and 7