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SEDIt1ENTA':ION POt]DS <br />SEDIh1ENT MONITORING PROGRAM <br />PURPOSE: To monitor the sediment accumulation, so sediment may <br />be removed as required by 30 CFR 817.46(h). <br />METHOD OF MONITORING: <br />1. Each pond is sized for a design sediment volume based on dis- <br />turbed acreage upstream. <br />2. Each pond varies in shape and size. The pond will be pro- <br />filed to calculate volume capacity. A distinct marking will show on <br />the dam's upstream face of the water level that corresponds to 60 <br />percent of designed sediment volume. <br />3. Each pond will be inspected for sediment accumulation: <br />a, at least monthly, <br />b, after heavy rainfall, and <br />c. at times of heavy snow melt runoff. <br />4. The pond will be cleared of sediment using front-end load- <br />ers or bacY.hoes. <br />~l 5. Sediment will be disposed of in waste disposal area. <br />6. If it is determined that sediment accumulation has reached <br />the clean-out level but is under water, the pond will be drained so <br />sediment may be removed. Under no circumstances will water be <br />drained from the lowermost dam. <br />~J <br />