Project Summary

The Maine Avenue Pump Station (MAPS) in Gardiner pumps approximately 85% of the City’s wastewater flow. MAPS was constructed in the late 1970s, and the pumps were again upgraded in the mid-1990s. The pump station was originally designed with a 2” bar rack for removing inorganic matter from the wastewater flow prior to pumping. The 2” bar rack required excessive maintenance from a small team of wastewater operators. And, with the increase in use of “wipes,” which pass through the existing bar rack, the City had been experiencing an increase in pump clogging. Furthermore, during periods of high flow, the lower level of the pump station could flood, presenting a safety hazard for operators.
 
Hoyle Tanner completed the evaluation of CSO storage, retention and treatment alternatives, mechanical screening improvement alternatives, preliminary engineering, final design and construction, permitting, environmental impact assessment and assisted with funding for this project. The constructed project included a CSO tank with tipping bucket and dewatering system, a long multi-rake bar screen that transports screenings to the upper level of the pump station for ease of disposal, and washer/compactor unit to remove organics and excess water, and decrease disposal costs.