A 425-mgd pump station with dual self-cleaning trench-type wet wells is being designed for the City of Columbus, Ohio Southerly Wastewater Treatment Plant. The pump station layout is in general agreement with the configuration recommended in the latest hydraulic institute standard for
pump intakes for solids-bearing liquids. A physical hydraulic model study was performed to optimize the hydrodynamic conditions at the pump intakes and document the satisfactory results. The model study resulted in a reconfiguration of the wet well and its upstream approach arrangement, which
significantly improved the uniformity of the flow within the wet well, while minimizing the anticipated costs associated with the pump station's construction and operation.
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