Lisbon Wastewater Treatment Facility, Lisbon, ME Client:  Sevee and Maher Engineers, Inc. A new Wastewater Treatment Building includes a formed concrete ramp system utilizing weirs, mechanical screens and bypass channels to deliver sewage to and from a vortex separator.  The building houses a grit decanter, electrical control room, with provisions for a future septage acceptance station. The Town of Lisbon Waterwater Treatment Plant was the recipient of the 2006 Department of Environmental Protection (DEP) Achievement Award for their commitment to upgrading the system’s pump stations.                     Additional Projects