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<br />3 <br /> <br />specifications will be complete in techni::al adequacy and detail so that a <br />'oeasonable construction cost may be provided to the cl ient. <br /> <br />1. Hydrology <br /> <br />The town and Phillips County, in cooperat'ion with Colorado Water <br />Conservation Board and the Corps of Engineers, Kansas City District, <br />will provide the hydrology for the I::roject. The stream hydrology for <br />North Fork Frenchman Creek at Pao'i i '[ s: <br /> <br />Flood Freque.!!f,wen! Peclk Oi s<;ha r,9?s <br /> <br />10-year <br />25-year <br />50-year <br />100-year <br />500-year <br />July 30, 1989 <br />The hydrology summa ri zed above wi: 1 be used <br />feasibility study. <br /> <br /> 350 cfs <br />1,100 cfs <br />",100 cfs <br />3,900 cfs <br />8,100 cfs <br />9,700 cfs <br />as the .}asis for the <br /> <br />2. Hydraulic Analysis <br /> <br />The hydraulic analysis will determine water surface elevations for <br />the 10-,100-, 500-year and July 3D, 1989 flood events. All hydraulic <br />calculations will be computed using HEC--2 computer model for the <br />design discharges. Flood profiles I'rill be calculated by thE! standard <br />step method employing the Corps of Engineers HEC-2 computer program. <br />The July 30,1989 profile wi!' be E'!::tablished from know "high water <br />marks" elevations. <br />Photographs will be taken of the study reach of the stream and <br />flOOdplain to support Mannings "n" values used for hydraulic: <br />computati ons. Values for the rouqhnE!ss coeffi ci ent, "n" w'il 1 be <br />se 1 ected for each cross-secti on. Tbey wi 11 be based both on exi s t i ng <br />conditions and post-construction conditions, as appropriate. <br />The water surface profil e used for the desi gn of a 'I evee system <br />