- Augusta Utilities Department
- Augusta, Georgia
- Our Role
- Lead Design Engineer, Construction Support.
- 65 mgd
- Construction Cost
- $70.5 million
Generated a reliable water supply for more than 160,000 customers
Expanded capacity from 45 mgd to 60 mgd
Implemented numerous process upgrades.
Faced with increasing water consumption demands from a growing population, the century-old Highland Avenue Water Treatment Plant required an upgrade and expansion. Because the plant required that the expansion take place on its existing plot of land, an inventive approach to meeting the need for additional capacity was required.
As a 100-year old facility in a residential neighborhood, this expansion project required innovative thinking and design to address its challenges. The client had limited resources for expanding the plant beyond its existing footprint, and the age of some of the supporting areas required in-depth planning and extra measures to ensure that the aging infrastructure could continue to serve the plant. In addition, the new design incorporated the striking Art Deco and Art Moderne architecture of the existing facility.
Gannett Fleming’s design solution included detailed plans to stage construction in order to maintain service during the expansion. The firm also performed in-depth evaluations for various process modifications, including a study of existing filter performance, a feasibility study of adding an air scour system to replace the existing surface sweeps, and an evaluation of operating costs for replacing gas chlorine with a bulk commercial hypochlorite solution or on-site hypochlorite generation system to ensure the lowest possible life-cycle costs for the plant.
- Installation of an on-site hypochlorite generator system eliminated the need to store and handle hazardous chlorine gas at the facility. This system is the second largest operating on-site hypochlorite generation system at a water treatment plant in the state of Georgia.
- Developed a four-tiered safety approach to protect the existing uncompacted embankment of two, 60 million gallon holding ponds originally constructed in 1899 and 1937
- Utilized the CM at-risk method of project delivery
- Designed for future enhanced treatment using ultraviolet disinfection.
- The new facilities were designed so the water from the holding basins continues to flow through the plant using gravity
- In cooperation with a local school for the arts, murals depicting the Savannah River basin were painted on the large exposed concrete walls of the clearwells along Highland Avenue.