GAI provided design, permitting, construction administration, and startup/commissioning services to Nassau Amelia Utilities (NAU) for a new 1.0-million gallon, prestressed concrete ground storage tank (GST) for potable water, along with a new booster pump station (BPS) to serve the existing domestic low-pressure and fire protection high-pressure distribution systems of the southern portion of Amelia Island. The new BPS was equipped with four horizontal centrifugal pumps—two 1,600-gpm, one 600-gpm, and one 350-gpm in capacity—as well as one 150-gpm vertical, multistage inline jockey pump. Early design phases services included an evaluation of the existing fire protection level of service within the service area, condition assessment of the existing GST and pump station, flow projections, hydraulic modeling, and redundancy/reliability planning.

For construction activities, the GAI team implemented a phased approach for the project, due to its location within a constrained 2.6-acre site. These activities included demolition of the old GST and construction of the new facilities—while maintaining service for both the existing pump station and the backup generator protection.

The project also included the construction of new pump and electrical buildings, variable frequency drives for the pumps, a supervisory control and data acquisition (SCADA) system, and a new 500-kW backup generator. The site is immediately adjacent to an existing resort and plantation properties, and GAI’s design and construction teams coordinated all activities with numerous stakeholders throughout the project.