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• wi 11 ut 11 i ze, as r~ecessar'y, st r•aw d i Ices, r'1 prap, check dams, <br />mulches, vegetative sediment filter-s, dugs=~~.rt ponds, or other <br />measures that reduce overland flow velocity or runoff <br />vc~ 1 i_une. See Sect i t ~n ~. Ov. 3. <br />4.ir;;.E Sedimentation Fonds <br />"fhe location of the planned sedimentation pond is presented <br />cm the Drainage and Sediment Co'r~trol Flan Map (hlap E). The <br />design plans ar~d specifications for the sedlrneritatiori pond <br />ar•e pr•eser~ted in Secti~_~r~ ~.tr5.6. The sedirner~tatiorr pc~r~d <br />will be located as close as practical to the area being <br />disturbed by surface facilities. <br />• This application contains calculations used to deterrnir~e <br />ri_rnoff vo.lr_unes and flaw rates for the lu--year, ~4-hour <br />precipitation event and subsequent sediment volumes. The <br />precipitation data was obtained from the NUR Rtlas ~, Voli_rrne <br />3, for C::olor•ado; soil types were otltair~ed from the Soils I+iap <br />(Map 4). the design of the sedimentation p~-end is based on <br />worst case conditions, which exist during and just after an <br />area has been distr.ir•bed and before any final r•evegetation of <br />the construr_tlorr site is completed. <br />R r~on-cl~~ggir~g, dewater•irig device is located at a <br />higher elevation than rnaxinnuii sediment storage volume. <br />Dewaterir~g will be achieved by p~.rrnping as necessary to <br />c~=~rnply with the applicable state laws ar~c1 regulations. <br />Sediment will be removed fr•orn the sedimentation pond when <br />4. ir5-E <br />