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v <br /> Surface Drainage of the Preparation Plant Area <br /> A proposal has been made to delete most of the Savage Pond <br /> located at Mid-Continent Resources Preparation Plant Area. In <br /> order to do this it must be shown that the four ponds constituting <br /> discharge point 001 are adequately large enough to contain the <br /> sediment and surface runoff from a 10 year - 24 hour precipitation <br /> event. <br /> The following computations are based on the Soil Conservation <br /> Services' Procedures for Determining Peak Flows in Colorado (SCS) <br /> and Applied Hydrology and Sedimentology for Disturbed Area (AHSDA) <br /> (Barfield, et.al. ) . <br /> In order to determine the arieal extent of disturbed area <br /> which contributes flow to the four preparation area ponds , Map <br /> • II-B-App, 7-Att. 3 from Mid-Continent' s permit application was <br /> used. Areas 1 , lA and 2 were examined in order to determine the <br /> total sediment loads and flow going to these ponds . <br /> Area 1 includes the preparation plant, district office , <br /> employee parking and coal stockpiles. This area has almost no <br /> vecetation and a relatively moderate slope. <br /> Area 2 includes the Savage Shop and parking area . This area <br /> also contains no vegetation and a relatively flat slope. <br /> Area lA contains the steep outslope of the old refuse pile. <br /> Although this area has a good vegetation cover it does not comprise <br /> more than 50% of the total area. <br /> 59 <br />