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� _ -- - - - -- --- - - - -.. - - - - - -- - - � - - <br /> I <br /> �1 <br /> ; <br /> �f � <br /> � <br /> ' ! Storm Sewer <br /> � <br /> When street unprovements/repairs are being considered, the existing storm sewer system needs to be <br /> � � reviewed. The design standards for storm sewer systems have changed and improved since many of <br /> � the streets and storm sewers were constructed in Centerville. Presently it is recommended the <br /> � drainage area to ihe upstream end of any storm sewer system be no greater than 3-5 acres. This <br /> minimizes the amount of storm water reinoff being conveyed down a street's surface and improves <br /> � � iniersection drainage. <br /> I i The City of Centerville has some storm sewer systems that p�rform poorly due to undersized <br /> pipes/structures and flat pipe grades. Placing lazger pipe and reconstructing catch basins and <br /> � manholes to help collect storm water would be advantageous on many streets. <br /> � Figure No. 5 is a map of the City that shows storm sewer extensions that are antici�ated when streets <br /> � are reconstructed. This layout is based on a brief review of the City's existing system; however, a <br /> more detailed design and study will be perfoimed during prepazation of feasibility reports and <br /> � construction plans for these areas. In addition to storm sewer extensions, it is necessary to install <br /> PVC draintile to p�per2y drain the street subgrade. <br /> � � <br /> � Mvst homes in the City have basement sumps and sump pumps that dischazge groundwater to low <br /> �� areas around the home. In some cases it may be necessary to provide connections to the City storm <br /> r sewer for sump pump water, to prevent deterioration of street pavements. <br /> i � <br /> � <br /> � � � Sanitary Sewer � <br /> '� When overlay and reconstruction type projects are considered for an area, the existing sanitary sewer <br /> � I system needs to be reviewed to make sure repairs are done before street reconstruction. As part of <br /> �'� the review, pipes will be televised and ihe associated report reviewed by the Engincer. This review <br /> ,, will deternune if repairs/upgrades are required. <br /> � <br /> � <br /> � <br /> , Centerville Paveme�rt Management Study 17 <br />