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structures and public projects such as road crossings and greenways where no practicable alternative exists. J. Public Water and Sewer Extension Policies. Wholesale sewer services within Cabarrus County are provided by Water and Sewer Authority of Cabarrus County and retail sewer services are provided by the municipalities of Concord, Kannapolis, Harrisburg and Mount Pleasant. WSACC does not have any policy of its own regarding provision of services within flood hazard areas, but instead depends on the local governing body to make that decision. WSACC and the municipalities own the sewer lines within the county and these lines meet all county and state guidelines. The municipalities maintain all water lines K. Acquisition Cabarrus County has not actively acquired any flood hazard properties, but has encouraged the use of these areas as active or passive open spaces (i.e., parks and recreational areas). L. River Basin Rules 1. The North Carolina Division of Water Quality has adopted rules for development within the River Basins that will affect development within Cabarrus County. The goal of the rules is to reduce and maintain phosphorus loading levels at pre- existing 1991 levels, to reduce nitrogen loading 30% below 1991 levels and to reduce the velocity and to control the volume of storm water runoff within these protected river basins. 2. The rules are performance -based rather than prescriptive meaning there will be a choice of best management practice options from which land users and developers and local governments can choose. Rules include provisions for riparian buffers along all water bodies (rivers, lakes, ponds, and streams but not manmade ditches) and use of swales, created wetlands, and detention /retention ponds. Rules are being phased in over a period of time. M. Effectiveness for Hazard Mitigation. The Cabarrus County policies and ordinances are rated in Table D -8 as to their effectiveness for hazard mitigation. TahlP n -S- Vffe rtivenecc of Current Policies and Ordinances Policies and Programs Effectiveness for Mitigation low, medium, high Small Area Plans Medium Subdivision Regulations Medium Flood Damage Prevention Ordinance High Soil Erosion and Sedimentation Control Ordinance High Manufactured Home Park Ordinance High Building Code Enforcement Ordinance High Water Supply Watershed Protection Ordinance High Public Water and Sewer Extension Policies High Yadkin- PeeDee River Basin Rules Medium Annex D Evaluation of County Policy D -17 December 2009 and Ordinances Attachment number 13 F -6 Page 165