Cobb Fowler South Trunk Sewer Improvement Project

Reduce overflows, meet future capacity demands, and protect the environment

Project Overview:

The Cobb Fowler South Trunk Sewer is a critical component of DeKalb County’s sewer collection infrastructure, which conveys sewer from local residents, businesses, and industries to the Snapfinger Creek Advanced Wastewater Treatment Facility (AWTF). The project is part of the county’s $2.4 billion capital improvement plan (CIP) to improve its water and wastewater infrastructure. Once completed, the Cobb Fowler South Trunk Sewer Improvement Project will provide much needed capacity to accommodate future growth and enhance the environmental resilience of the county’s infrastructure.

This project begins at the Flat Shoals Pkwy. crossing of Cobbs Creek and extends north through unincorporated DeKalb County to the Rainbow Dr. crossing of Cobbs Creek, as well as branching East underneath Chateauguay Dr. and Leisure Woods Dr.

Primary Components:

Upgrade Infrastructure

Replacing approximately 2.5 miles of existing 30-inch gravity sewer with new 36-inch sewer, in addition to approximately 1 mile of existing 8-inch gravity sewer with new 8-inch and 12-inch gravity sewer crossing underneath Flat Shoals Parkway and Rainbow Drive.

Expand System

Connecting numerous existing residents and businesses, and multiple aerial creek crossing replacements with subsurface creek crossings varying in size from eight inches to 36 inches in diameter.

Goals & Objectives

Achieve regulatory compliance by reducing sanitary sewer overflows to provide best in class service to the community.

Investing in strategic infrastructure to meet future demands to increase sewer system capacity, foster economic growth, provide job opportunities, and direct resources to south central DeKalb County.

Protect natural resources through environmental stewardship by minimizing sewer spills to protect public health and improve local ecology.

Project Location

The project begins on the South side of Flat Shoals Parkway and continues North to Rainbow Drive. The project also includes a section of Chateauguay Dr and Leisure Woods Drive to the East of the 30″ sewer trunk line. Primary project components include upsizing of approximately 3 miles of gravity sewer ranging in diameters from 8 to 30 inches, replacing aging infrastructure to increase sewer capacity.