Watershed-based stormwater master planning – watershed assessments, City of Griffin Stormwater Utility Dept., Ga
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The City of Griffin Stormwater Department has completed Watershed Assessments on the City's three major watersheds as part of its comprehensive watershed masterplanning efforts. The three major watersheds are Shoal Creek and Potato Creek in the Upper Flint River Watershed (HUC 03130005), and Cabin Creek in the Upper Ocmulgee Watershed (HUC 03070103). The City is situated at the headwaters of the three major watersheds, and this unique location affords the City an opportunity to mitigate the effects of stormwater runoff originating from the urbanized areas of Griffin. The Assessments have quantified the pollutant loadings for the three watersheds as well as additional data regarding the impacts downstream. The objective of the Assessments was to develop comprehensive Watershed Management Plans that will address water quality within the City and downstream of the City's boundaries. The City’s ability to implement an effective watershed management strategy will require that the City utilize the information from the masterplanning work to develop cost-effective structural and non-structural Best Management Practices (BMPs) to improve water quality. These improvements will assist the City in accomplishing the following goals: 1) achieve regulatory compliance with the NPDES Phase II Stormwater General Permit requirements; 2) address Total Maximum Daily Loads (TMDLs); 3) provide data for use in securing future NPDES wastewater discharge permits; and 4) assist the City in regulating future development by mitigating some of the anticipated impacts.