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• Table 2.3-23. Determination of Grazing Capacity in AIAt's for Each Vegetation Type of lands Under Trapper <br />Mine Surface Control.(1)(4) <br /> X Nucrber <br />Acres of Ece- <br />Available X Yield in AUM's X La<ob Units <br />in 1980 lbs/acre Available _ <br />Available AUM's/ X PI1M's/ Available/ <br />Vegetation Range By Range By Barge By Range Pore by Month Acre by <br />Type Site Site Site Site (3) Range Si[e 6 Mon[hs Range Site <br />Pirryon- <br />Juniper (2) - 192.9 <br />Mountain <br />Shrub <br />North , <br />Eas[ and <br />+ 7,200 <br />Feet <br />Exposures (A) 2,255.2 813.5 1,140.9 .51 <br />South <br />and West <br />Exposures (B) 954.6 552.9 328.2 .34 <br />Big Sage- <br />brush~Yass <br />All <br />Exposures (C) 2,964.4 702.8 1,295.6 .44 <br />Total 6,367.1 2,764.7 <br />190.2 2.2 <br />54.7 1.5 <br />215.9 1.9 <br />(1) An animal unit rronth (AUM) is taken as one cow with calf consuming 804 lbs of forage per rmnth. <br />Expressai in terns of sheep, one AIM will equal 4.3 ece's each with ore lamb. (Cook, 1970) <br />(2) No data available as to lbs/acre yield. Type will not be impacted by mining or reclamation. <br />(3) Tnis value assures thaz ore-half of the total current annual growth (G4G) of herbaceous vegetation <br />will be used by doms[ic livestock and that shrubs aze rot used. <br />(4) Based on 1980 production data (herbaceous vegetation only). <br /> <br />2-119 <br />