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-I he 1C.rCr year - 24 hour rainfaal in the area is ~.6 inches at. a CN <br />of B~', this results in 1.v7 inches o+ runoff. <br />Fond Valumez = ]..07 in. ;. 1 ft/1:' in, r 1 ac. >: 4~,f36G =_q.4t/ar..rte <br />= 3Eihi4 cu.ft. or 144 cu. yards. <br />Eatimr.{t.e of sediment volumes i.s made usinU the Un:ivt_rsa1. Soil <br />Loss Equat.ion:~ <br />Acreage R k. LS I:: F' Dr:l Ratio Ions/yr <br />1..U :ib 6 7.G 0.5:1 r?. ; Ci.6u 1S'.7 <br />Three Year Sediment Volume: <br />1.9.7 Ions .. _; yrs ~irpOlt! ., lr.u.ft. =~ 1478 r.u.it. <br />~i lore NO .Lb. or v4.7 cu. yds. <br />..fot.al. F'or'rd regr_iired = 144.1; + 54.7 = 198.7 cu. Yds. <br />A plan view of ttrc pored is shown on Map nn. 1. the pond wi7.1 be <br />r_nver an area of a.ppro;:imately .'_u:;Jir sq. ft. and will be 1.65 feet <br />deep. ~ <br />fhe t.ota] volume of t:he iCr year-;4 hour' inflow aru1 the 3 year <br />~~edi.n~ent. volume is `29'?B c:u.ft. which stinr_rld result in a water <br />level of u.9 feet in the pond. S:i ace t_he total. pond depth is 7.66 <br />feet , this results i.n a freeboard of ii. 75 feet , therefore an <br />addii=tonal O.<:; feet depth will. he e::cavated to provide 1.Ulr feet <br />frrebr~ard. "fhe t.ntal pond depth will be 1.5'0 feet. The e;;istinq <br />t;er~m of 4 i't. to 8 ft. height between the. ]or•!er bench area and <br />f-nurn~i7.e Creel; will direct: a1. 1. +lows from the lower- bench area <br />into thr~ sedi. meat pond. This her~m i s shown nn I.1a{:; No. 1 . <br />F~nurmil.e Creei~ 100 year - 24~I-~ourstar~m floodplain. <br />l"he +o.llowi.nq equation is given in Techni.ca:l Manual t# ]. of the; <br />Colorado Water Cnn=,er'vation Noard for' the Ihountain Fedion of <br />Col. or ado: <br />7F17 . 9.::'~ <br />~ ] tro = 1 . tea x G <br />~r <br />