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ditcheg~ and Culverts, A copy of the computer program's input and output file information <br /> has be@n inclVded in path sedimertta[ion pond design report. <br />the input igcludes precipitation amount (incheg), wet@rshed area (acres), time Of <br />doneentrat(an (hour$), runoff Curve ~ rtumber (CN), representativ@ particle-site <br />distr ib~uti osts of the Soli types in the xatershed, Sedirpentalo9y ihf ortAation, and spillway <br />f of osmption, @tc. <br />Yh@ prpciPi tation amount; ton the Ypest Minp {or the d@si9n storm durptions Vere abtainpd <br />from the NDAA Pre@i pi Cation Frequency Atlas pr erioita~n - Fre rent lys of the T7e tern <br />gt tes Volume ll[ Colonado, 1973, end are listed below: <br />10-Y@ar, 24-4our - 1.70 inches <br />25-Year, 24-hour - 2.`10 inches <br />100-y@ar, 24-hour _ 2.50 inches <br />These ambunts also include water emanating from snau cover a; snOwmelt in a limited <br />Period of time. <br />Thg runoff curve humger (CN) {s a fpctar relating the amount Uf rai of ell to the amount pf <br />rurtoff fan a giveh area. Thp soil prodibility factor (^k" faro or) is a factbr of a soils <br />sugcepti biliLy to erasioh antl infiltration Capacity. Th es@ factors are dependent Upon the <br />inTiltratlon characteristics of the soil kYPes ahd the type and Mount o} v@getetioh, <br />iahles t3'~1 end 13-2 list the vel ueS of CN and ^k" for different soils Types at the Yoast <br />Mihe. <br />5 h'e Ch ar~d ~k`• factbr for 'tech o5 th@ ponds is bet etmined as b weighted average. The <br />undisturbed area curve Numb@r and ~`%^ {actor lnf ormation is bas@d vh the veg et etiGn and <br />soils information foWd within Tabs 9 end 10, rasp@ctivel y, ofi the Yoast 'M inB permit, <br />The sediment storage is calcVlated using the Revised Universal Soil loss Equation <br />contained within contained within the SEDCAD~ Computer program, The gpillways are <br />designed Using the spillway routing subroutine program in the SEOCADi tom ut@r <br />p Program and <br />appliCabLp ehgin0erih9 pr oc pdures as tlescribed ih the text of each sedimentation pond <br />design report. <br /> All sediment ponds are designed and lot @ted to captur@ surf aLe runoff from upstream <br /> disturbance of ea5 antl t0 comply with all applicable State and federal regulations. <br />Deai grl5 for the folLOwing setlimentation ponds ore brovjded in this tab: <br />7 Revised OS/$3/95 <br />