Gwinnett County Department of Water Resources – Wastewater Pump Station Condition Assessments

In an effort to better plan the needed improvements within the wastewater pump station system, the Gwinnett County Department of Water Resources (GCDWR) planned a project to conduct condition assessments of the existing pump stations. The project began in 2011 with ESI helping to define the scope of work for the project, plan the assessment procedures, preparing an assessment checklist for each type of pump station, assisting with development of a priority ranking system, and conducting assessments on an initial group of pump stations. After the initial group of stations, the project expanded to cover over two hundred (200) pump stations.
The assessments involved performing site visits to each pump station to evaluate the physical condition of the site assets. This included the driveway, access gates, parking areas, site pad, surrounding perimeter property, fencing, wet wells, valve vaults, storage tanks, pumps, piping and valves, site lighting, generators, electrical panels, and other miscellaneous assets which are present at the pump stations. Additionally, pump drawdown tests were conducted at each site to allow for comparison of the pump operation with the data in the County’s database and pump curves on file. ESI also provided estimates of the remaining useful life of the key assets based on the findings of the site assessments. ESI is now assisting Gwinnett County in implementing the repairs to the pump stations as recommended in the condition assessment reports.

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