Big Creek Watershed Improvement Plan

The basin study was previously performed in 2000 and then updated in 2011 as a joint study between the cities of Roswell and Alpharetta. The watershed is over 100 square miles in size. Most of Roswell is in the lower portion of the basin above its confluence with the Chattahoochee River. Several impaired stream segments of tributaries to Big Creek, including Hog Waller Creek and Foe Killer Creek, are located within the city and were the focus of the investigation. The primary project goals included updating the Big Creek Watershed Study to comply with current regulations and guidance, including EPA’s Nine-Element Watershed-based Plans (WBPs) to meet minimum requirements for Roswell to be eligible for state and federal grant funding of future projects; updating the basin watershed characterization; evaluating water quality trends for Fecal Coliform in the streams; utilizing existing studies and plans in the update; and preparing a prioritized CIP of watershed improvement projects, both structural and nonstructural, with schedule and planning-level costs.