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Two alternates are provided for constructing the outfall line. Alternate <br />One provides for following the existing alignment and Alternate Two provides <br />for moving the outfall line west to an alley. The area where the outfall line <br />is proposed for either alternate is congested. Construction will result in <br />considerable disruption of existing driveways and yard areas. The ourfall <br />line should be constructed as 21 inch reinforced concrete. <br />The street modifications on Highland Road would consist of placing a var- <br />iable thickness (1/20 to 30) bituminous surface with a berm curb to control <br />the runoff. The storm water runoff would be directed northeast into the new <br />storm sewer system. The proposed street modifications will raise the street <br />grade. This could exacerbate some current grade problems betweer the street <br />and the garages. <br />PROJECT COST AND ASSESSMENT <br />The project cost and assessment rates for the storm sewer improvement are <br />outlined in this section wi-h a detailed cost estimate provided in the Appen- <br />dix. The indicated prices are as projected for the 1988 construction season <br />(ENR 4500). <br />Estimated Project Cost <br />Total Cost Cost/S.F. Cost/L.F. <br />Alternate I $19,500 $0.07 --- <br />Alternate II 25.000 0.10 --- <br />Street Modifications 8,250 --- y 13.75 <br />- 4 - <br />Rpt13933 <br />