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<br />. <br /> <br />. <br /> <br />. <br /> <br />Pawnee Creek. Reach I is essentially the portion of the City of Sterling that is north of Iris Drive. <br />Reach n extends from Iris Drive south to the northern edge of Riverside Cemetery. Reach m includes <br />the Riverside Cemetery, and extends south to the Pawnee Creek bridge under HWY 6, then west along <br />Pawnee Creek to CR. 33. Reach IV extends west along Pawnee Creek from CR. 33 to CR. 29. <br /> <br />The basis of direct damage for Reach 1 is the "Floodplain Information and Drainage Plan for Sand <br />Creek and the Pawnee Creek Overflow at Sterling, Colorado" prepared in 1983 by Charles Leaf and <br />Resource Consultants. The primary purpose of this report was to define loo-year floodplains <br />throughout the City of Sterling. Consequently, floodplain analysis was conducted City wide, and the <br />Pawnee Creek overflow was just one part of the analysis. Flood peak flows were determined for <br />several frequency storm events, and then hydraulically routed using HEC-2. Average depths of <br />inundation of buildings was estimated, and total tI~m"ge determined using damage versus depth <br />curves. Damages from the 1983 report were updated to 1998 dollars using inflation factors published <br />by the Colorado Department of Revenue. <br /> <br />Direct damage for Reach IT utilized the same procedures as for Reach I in that the same ratios of <br />damage per acre for the various frequency storms studied were applied to the flooded area. Direct <br />damage for Reaches n and IV are primarily loss of crops and damage to roadways/railroads. Table 16 <br />presents the estimated damage for flood events along Pawnee Creek: <br /> <br />m-38 <br />