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10i09~90 15:50 <br />• • <br />Table 1, '1'rspper Minc: range bites eet.iIDaled pre and poetmine •o i1 lose <br />u Pun lowest measur ccl mean X cover, 1979-85, from pram ins areas. <br />004 <br />A RKLSCP <br />A .foil loss, Tone/Acre/Year <br />R = Rainfall factor ..• 30 <br />K = Su i1 arodibility factor .., .25 (mine average) <br />LS Slope - 1cnRth factor •.. 9.95 (Avg slope length, 1,500 ft) <br />(Avg elope %, 14.7X) <br />C Cover factor (a combination of % canopy cover end litter) <br />P = Conservation practice factor ... 1 for premine areas, .A fo[ poetmioe <br />arena (12.1 - 18X elope, contour <br />farminK). <br />Premine Rangy Site A Worst Year Recorded, 1979 <br />A (30)(.25)(9.95){.098)(1) = 7.3 Tons/A/Yr. <br />° ,09N cove-r factor is based upon 23X herbaceous cover and 13-~~ <br />givinl• 36.f,% effective cover. <br />° A[CachNd Tahlr J, SC8 Tech. Note 50 (19A2) was used to gene- ~ ::hc . <br />factor for cover. The vaLie a „ woes that shru6e eoneribu~ ,u~,, <br />of 5U"/,, and the herbaceous Lypr. is (G). <br />Pna[mine Ranye Site A <br />A = (30)(.25)(9.95 )(.C451(.8) = 3.9 Tn ns/A/Yr, <br />SCaudard: <br />9~: hc•.baceous cover and 19.% litter (1)(2) <br />.CSC cov?r factor is based upon 33"F, herb aceous cover and 1SY, lit°.:_ ~_ <br />„i.v~ng 527, effecrive cover. <br />'e'hPd Table 3, SCS Tech. Note 50 (1982) was used to generate the .a ave. <br />,.' l.,r cover. The value assumes [hat shrubs do not contribute canopy <br />,~, and that the herb eceous type is (G). <br />„~:r~r cover Cac[u+' is .372 of the [oral efiv_ctive coves based on 1^ <br />..~ pram in e<1 J.:ta, Ruugc 91[e A, Ta61e 2. <br />,., page <br />