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<br />TOTAL IMPROVEMENT COSTS <br /> <br />Cost <br />$ 0 <br />$ (810) <br />$ 11,700 <br /> <br />$11,700 <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />COMMENTARY - SHEET 11 <br /> <br />The existing grass-lined channel in this stretch of Little Dry Dreek, as evident on <br />the plan view of Sheet 11, has capacity adequate for conveyance of the 100-year flood. <br />The depth at which the 100-year flood overtops Marshall Street exceeds the maximum <br />depths recommended in the Urban Storm Drainage Criteria Manual (Reference E). Since <br />Marshall Street is a local street and not considered as part of the access network for <br />emergency vehicles and because the potential flood damage resulting from the undersized <br />culverts beneath Marshall and Harlan Streets is minimal, their enlargement was not <br />included as part of this Master Plan. <br />The 100-year floodplain should continue to be regulated and all channel <br />modifications should be closely monitored. Residents in the vicinity of the 100-year <br />floodplain should be notified annually of potential flood hazards and the acquisition of <br />flood insurance by those property owners who would be adversely affected by the 100-year <br />flood should be encouraged. The channel should be cleared of all debris regularly during <br />the flood season and after all major storms. <br /> <br />TOTAL IMPROVEMENT COSTS - SHEET 11 <br />Item <br />TOTAL CONSTRUCTION COSTS <br />Annual Operation and Maintenance Costs <br />Present Worth Operation and Maintenance Costs <br />