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Florence enlisted Garver to help with the city’s ongoing Sanitary Sewer Overflow (SSO) Corrections Program. The City initiated the program to correct SSOs at 13 different locations throughout the collection system. Despite the City’s previous sewer rehabilitation efforts, an overflow continued to occur in a heavily developed commercial and retail area of East Florence along Commerce Street during wet weather events.
To meet the City’s mandated consent order schedule, Garver had less than three months to evaluate alternatives and complete plans and specifications for submission to the state. The selected approach includes the construction of a flow splitting structure, lift station, and forcemain to handle flows in excess of the gravity sewer system’s capacity. The flow splitting and flow control facilities were designed with provisions for the future addition of mechanically cleaned barscreens ahead of the pumps. Pump controls will incorporate variable frequency drives to match influent flows and minimize potential surge loads on the downstream gravity sewer systems.
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