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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />, <br />, <br />I <br />I <br />t <br />, <br />I <br />t <br />I <br />t <br />I <br /> <br />SELECTED AL TERNA TIVE SUMMARY <br /> <br />The detailed description of the improvements is presented in Chapter IV for Grange <br />Hall Creek and the four main tributaries. <br /> <br />Drainageway Reach Stations <br /> <br />Selected Alternative* <br /> <br />A summary of the Benefit/Cost Anlaysis for the selected alternative for each <br /> <br />I G 0+00 to 76+50 <br /> <br />2G 76+50 to 143+65 <br /> <br />3G 143+65 to 175+30 <br />Main Stem <br />Grange 4G 175+30 to 205+40 <br />Hall <br />Creek 5G 205+40 to 219+20 <br /> <br />6G 219+20 to 236+65 <br /> <br />7G 236+65 to 278+40 <br /> <br />7G 236+65 to 278+40 <br />8G 278+40 to 294+65 <br />9G 294+65 to 309+60 <br /> <br />IS <br />2S <br /> <br />0+00 to 16+80 <br /> <br />16+80 to 77+65 <br /> <br />Tributary 3S <br />S <br /> <br />77+65 to 110+70 <br /> <br />4S <br />5S <br /> <br />110+70 to 130+90 <br /> <br />130+90 to 140+00 <br /> <br />Tributary I NE <br />NE <br /> <br />0+00 to 47+00 <br /> <br />2NE 47+00 to 51+75 <br /> <br />Tributary IN <br />N <br /> <br />0+00 to 26+25 <br /> <br />2N <br /> <br />26+25 to 47+00 <br /> <br />Tributary I SE <br />SE <br /> <br />0+00 to 22+20 <br /> <br />2SE 22+20 to 41+00 <br /> <br />Channelization (Private Property) <br />Selected Structural Improv. <br /> <br />jurisdiction is presented below. <br /> <br />Do Nothing with Flood Plain Zoning <br /> <br /> BENtFIT/COST ANALYSIS SUMMARY <br /> (6 3/8"10 Interest Rate - 1977) <br /> (Thousands of Dollars) <br /> COST PRESENT WORTH <br />Item Adams Northqlenn Thorn ton Adams Northqlenn Thornton Refer to: <br />C . I 7.7 1036.2 S83.4 7.34 976.1 549.6 Table IV-3,4 <br />onstructlon <br />Eng. an~Const. .8 114.0 64.1 .8 107.4 60.5 Table IV-3,4 <br />Services <br />Site Acquis. 0 19.4 26.8 0 18.3 25.2 <br />Fiscal OJ'd .3 46.8 27 .0 .3 44.1 25.4 <br />Admin. <br />O&M .04 47.04 12.55 0.6 686.4 183.1 Table IV-3,4 <br />(Annual) (Annual con- <br /> verted to <br /> present wortn) <br />TOTAL 9.0 1832.3 843.8 <br />DAMAGES 1046.0 1189.0 1193.0 <br />t3ENEFI rs5 974.0 333.0 113.0 <br />NET BENEFITS -965.0 -1499.3 -730.8 <br /> <br />Do Nothing with Flood Plain Zoning <br /> <br />Do Nothing with Flood Plain Zoning <br /> <br />Street & Railroad Crossing Improv. <br /> <br />Grass-lined Channel & Street Cros. Improv. <br /> <br />Grass-lined Channel & Street Cros. Improv. <br /> <br />Storm Sewer & Street Crossing Improv. <br /> <br />Selected Structural Improv. <br /> <br />Selected Struc. Improvements <br /> <br />Selected Struc. and Dam Improvements <br /> <br />Do Nothing with Flood Plain Zoning <br /> <br />Selected Structural Improvements <br /> <br />Grass-lined Channel & Street Cros. Improv. <br /> <br />Selected Structural <br /> <br />Grass Lined Channel & Street/RR Cros. <br /> <br />Do Nothing with Flood Plain Zoning <br />Channelization with Selected Struc. <br /> <br />I . Includes 15% contingency. <br />2. II % of total of constructon. <br />3. 4% of total of construction, engineering, and site acquisition. <br />4. Does not include any public costs for improvements in Reach IG. <br />5. Includes intangible benefits. <br /> <br />Selected Structural & Dam Improv. <br /> <br />Do Nothing with RR Crossing Improv. <br /> <br />*AII improvements imply flood plain zoning and flood insurance. <br /> <br />2 <br />