(33C) A procedure to determine if mine spoils will reach a downslope stream

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An extract from the INTRODUCTION of A procedure to determine if mine spoils will reach a downslope stream, Uwen R. Williams, USDA Forest Service, NSUD Report WSDG-TN-00004, MAR 1982, 29 pages.
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When evaluating proposed shaft mine operating plans, a field forester may on occasion desire to determine if mine tailings will reach downslope stream channels. This information would be very useful in the evaluation effort but is, by and large, unavailable. The problem, movement of mine spoils, entails the consideration of several variables related to terrain and spoils materials. Such a consideration quickly becomes complex and very site specific.
The following is a simplified approach to the problem and yields an estimate of either allowable spoils volume or critical slope distance. The procedure may be employed by the field forester to determine, at the outset, the need for mitigative measures.
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