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i i oonsesvative measure since 1981, 1982 and 1983 had higher than average precipitation. Since the USIE is associative, the ~4e in R will have a similar affect on calculated erosion from the iudisturbed and reclamation areas. Soil Erodibility (K) e rx~spec,-tians of reclamation and ~~;~**~ soils were contacted in July and August, 1987. Samples of the surface soils were taken and field notes recorded on soil structure, textin.~e and permeability as well as observations or evidence of erosi~ and/or overlarrl flaw. Soil samples were collected on »*+d; Gr„*t~ and reclaimed areas and returned to the lab aryl air dried. Subsamples were dry-sieved to det~mm;*+p particle size d;c+r;tv,r;ons (Hlack et al., 1965). The clay content was determined by hydrometry, however the clay omrtertts were generally low arri not all samples were analyzed for clay ooartesrt. Soil organic matter was d~e*+ni*+~ by a Walkley-Black digestion (Page et al., 1982). These data were handled in a data management system and an equation used to solve for K (Wisc3~eier and Smith, 1978) rather than the ~tarda_**j K nomograph. The average K for the tn+d~~+~ sites was 0.12, with a range of 0.052 to 0.211 (Table 2) aryl reclaimed sites averaged 0.11, with a range of 0.066 to 0.192 (Table 3). New calculations of K were needed because the mine permit showed a change in K in mine area soils from 0.31 to 0.17 with no supporting r docxmientation. The Jac]~on Camty soil survey has identified the mine soils as Qyorthent and Fluetsch soils. The CYyOrt2lents do not have K estimates, while the Fluetsch soils have a K of 0.32 for the surface of the Fluetsch part and 0.15 for the Tiagos part (USDA, SCS; 1973). the calculated K values frrmt mine site sar[g~ling were used in this study. k vnn,u,~ Fob exu.atnn~ ~.awas nM4t 3~ ~lr`FrGU.~x TO QL~t~¢MiuE p(Ak: iD .~ol~ [] gN S7OLKH~r~JO, ^AOV~n/{., t~rc~