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t <br /> program. SEDCAD <br />is an enhanced PC version of the SEDIMOT IT compute r program. Tab 13, <br /> Attachment 13-1, Addendum 1 con [ai ns a listtny and desc[i pion of [he SEGCAD~ input <br /> variables. In performing this analysis, Che cha rac[eristics of the minesite and <br /> ceclamatton procedures alony with on-site sediment control procedures were co nstdered. A <br /> complete listing of the SEDCAD~ inputs and outputs for the 10-year and 25-year design <br /> storms are provided in Attachment 13-4 C, Addendum 1, and summarised in Table 13-4C-1. <br />TABLE 1:1-4C-I <br />DES Lap H'i DRO U?G'i AUD ::E DI FI EIIT i~LOG'i SUI-0h1ARY <br />Pend igib - PHASE IV <br />Descrip[ren l0f r.-24Hr. 25't r.-~4Hr. <br />Fcecipitation Depth 1.7 in. '.1 ire. <br />L'if low Runoff 'JOlume _~.3 arf[ <br />Pond Volume 1a.7 ac-fr 19.7 ac-ft <br />Feak 3[aye 707.5.4 7fn 7.9 <br />P?a4: Inflow Fa[=_ 12'7.4F cfs 255.33 cfs <br />Feak Dischatge Fate 2n,87 cfs 1r,5.91 cfs <br /> Fre-5 F[tl my Basin - FH ASE IV <br />Des ctip[t~m 1G1'r. -24Hr. _5y r.-%4 Hr. <br />Fr ecipita[ic•n Depth 1.7 in. 2.1 in. <br />Inflow Runoff Volume 20.0 ac-ft <br />Pond Volume 15.8 ac-ft 15.8 arft <br />Peak 3t aye 7118.0 711P.6 <br />Pee h. Inflow Rate 138.55 cfs 2_2.02 cfs <br />Feak Discharge Rate 115.4 P, cfs 1P6.=8 rfs <br />Input ronsists of preci prratien amo nor linche sl, watershed area lacres), ttme of <br />concentration (hoursl, runoff cu ree number ICIJ1, represen to Clue particle-size <br />distributions of soils in the ar=a, sedimenr~•1.>gy informa[ron, spillway inferma[ren, etc. <br />• Tho drainage area for rhi s sediment pond was measured nn a 1"=400' topographic map (see <br />Exhibit 13-? and 13-5A1. <br /> 3 Revised 03/02/98 <br />