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the analysis. Flood peak flows were determined for several frequency storm events, and <br /> then hydraulically routed using HEC-2. Average depths of inundation of buildings were <br /> estimated, and total damage determined using damage versus depth curves. Damages <br /> from the 1983 report were updated to 2001 dollars using inflation factors published by <br /> the Colorado Department of Revenue. <br /> Direct damage for Reach II utilized the same procedures as for Reach I in that the same <br /> ratios of damage per acre for the various frequency storms studied were applied to the <br /> flooded area. Direct damage for Reaches II and IV are primarily loss of crops and <br /> damage to roadways/railroads. Table 13 presents the estimated damage for flood events <br /> along Pawnee Creek: <br /> Proposed improvements will prevent all Pawnee Creek overflows up to the 100-year from <br /> entering the City of Sterling. Thus all damage for the lesser flows is prevented for <br /> Reaches I and II. With the improvements, floods less than the 25-year flow will follow <br /> the historic Pawnee Creek drainage way and will not create an overflow condition. <br /> Flows in excess of the 25-year flood will follow the overflow, and will leave residual <br /> damage along the farmland. Reach IV includes only the potential damage that results <br /> from the lack of capacity under the railroad embankment in this area. (Upstream crop <br /> damage would occur with and without the proposed improvements). Even with the <br /> proposed railroad culvert in this area, residual damage in the Town of Atwood area <br /> would occur. A summary of damage, both before and after the proposed improvements is <br /> presented in Table 14. <br /> 37 <br />