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Ditch designs are summarized in Figure 1, Permanent Ditch Design Summary. <br />Ditch locations are shown on the Reclaimed Topography (1990) 8 Bond <br />Release Documentation Map. <br />Ponds <br />Ponds 2 and 5/6 will remain following final reclamation and bond release, and <br />will function as stock watering ponds. Previous studies have demonstrated that <br />the existing pond configurations meet all requirements for permanent <br />impoundments in accordance with 4.05.9 and 4.05.17 of the CMLRD Rules and <br />Regulations. Outlet structures have been designed to safely pass the peak <br />discharge from the 100-year, 24-hour event providing adequate freeboard. <br />Pond 2. Pond 2 employs a trapezoidal channel with a 3-foot bottom width and <br />3H:1V sideslopes as its outlet structure. The channel spillway has been <br />excavated through virgin material along the pond's west side. The spillway was <br />designed utilizing the Side Contracted Weir equation as follows: <br />Q = 3.1 b,.°~H,.° 1 <br />(J l~ <br />Where: O =Peak discharge from the 100-year, 24-hour event (cfs) <br />b =bottom width (ft) <br />H =flow depth through weir (ft) <br />Solving for H: <br />3.ib'°' J <br />_ C3.1~~0~ <br />= 1.45 ft. <br />14 <br />