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<br />--------:- <br />-.---,.----- <br /> <br />TABLE IV-4 <br /> <br />AVERAGE ANNUAL COSTS <br />NIVER CREEK DRAINAGE STUDY <br />(In Thousands of Dollars) <br /> <br /> Do-Nothing Alternative Recomm ended Improvements <br />Channel Construction Construction <br />Reach Damage O&M Cost Total Damage O&M Cast Total <br />Upstream of Culvert <br />North of 84th Avenue 24 23 0 47 3 10 25.5 38.5 <br />Culvert North of 84th <br />Avenue and Culvert <br />Under North Valley <br />Shopping Center 76 27 0 103 0 7 8.8 15.8 <br />Washington Street <br />to York Street 190 25 0 215 0 6 9.1 15.1 <br />York Street to <br />South Platte River 26 25 0 51 0 3 7.1 10.1 <br />TOTAL 316 100 0 416 3 26 50.5 79.5 <br /> <br />NOTES: <br /> <br />1. Damages are average annual values. <br />2. 0 & M values are overage annual operation and maintenance costs. <br />3. Construction costs ore one-fiftieth (1/50th) of the total construction costs presented in the summary of <br />Table IV-3. <br />