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`, Mr. Geoffrey P~aunders <br />January 31, 1980 <br />Page 3 <br />(small holding ponds with no formal outlet works, spill- <br />way or embankment). These sumps are designed to capture <br />the sediment load and the entire 10-year storm runoff. <br />The problem with this plan is the eventual disposal of <br />the retained water. Several alternatives, Listed below, <br />should be investigated further with regard to the feasi- <br />bility and acceptance by the appropriate authorities. <br />A. Pump the captured water to a nearby diversion ditch <br />_. which would eventually drain to a sedimentation <br />pond. <br />B. After waiting a specified time period, pumping the <br />retained water to [he creek directly. <br />C. Regrade ar.d contour haul road to permit conveyance <br />of storm runoff across Middle Creek to the nearest <br />diversion ditch for appropriate disposal. <br />D. Attempt to construct appropriate outlet, spillway <br />and embankment facilities, to formalize the sump <br />areas into sediment ponds. <br />2. Ponds H and I, and both sumps are all preliminarily <br />located within approximately 100 feet of Middle Creek. <br />Aside from the discussion in Number 1 above, special <br />authorization may have [o be requested to construct <br />these facilities. <br />3. It is recommended that prior to finalization of ponds E, <br />F and G and their related ditches, detailed mapping be <br />prepared for these areas (1" = 200'). Included in Chis <br />mapping should be the establishment of an accurate cap- <br />acity table for the existing pond (Pond G). <br />4. As you are aware, several of these ponds will capture <br />runoff with severe water quality problems. EFC and LRCWE <br />will work together with you in developing appropriate <br />design parameters and alternatives for solving these <br />treatment problems. This relates particularly to Ponds <br />B, E, F and I but may include others. <br />Upon your review of this material, we would appreciate any <br />comments you or others associated with this project may deem <br />necessary. To maximize the efficiency of our engineering <br />efforts, we would also appreciate receiving your thoughts <br />regarding further scheduling and intermediate deadlines as <br />the permit application preparation proceeds. O~ir continuing <br />efforts at this time will be directed towards the following <br />work items: <br />~'(1 Leonar0 Rice Consulting Water Engineers.lnc <br />