THE SITE EVALUATION TOOL: A MEANS TO IMPLEMENTING PERFORMANCE STANDARDS FOR PHASE II POST CONSTRUCTION MANAGEMENT PROGRAMS
Abstract:The NPDES Phase II requirement for post-construction runoff control measures is challenging many municipalities to find effective ways to manage stormwater impacts associated with newly developed and redeveloped areas. Too often municipalities feel pressed into adopting prescriptive ordinance provisions including fixed imperviousness limits or fixed housing densities as a means for protecting the watershed. Performance standards that specify desired goals or outcomes (e.g., runoff volume and pollutant load restrictions) provide an alternative to prescriptive measures. However, local governments have frequently shied away from performance standards for fear of the cost of administering their implementation. Mecklenburg County has developed a Site Evaluation Tool (SET) to address this need, and has implemented the SET for the Town of Huntersville. The SET is a flexible tool that is easy to operate, and provides quick feedback on a proposed site's performance for water quality and runoff control goals. Since it calculates pre- and post-pollutant loads and hydrologic measures, it is easy to compare results for a diverse set of targets. The SET also provides a way to test site best management practice design scenarios and compare results, allowing the development community to better understand how site design influences site performance and easily evaluate alternative site designs including a wide range of low impact development options.
Document Type: Research Article
Publication date: January 1, 2004
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