Project Overview
The City of Bayonne owns and operates 93.3 miles of sewer collection and 7.1 miles of force mains, 3,197 manholes, 1,545 catch basins, 16 regulators, 19 combined sewer overflow (CSO) netting chambers and four major pump stations. Combined sewer flows collected in the City are generally conveyed to the Passaic Valley Sewer Commission (PVSC) wastewater treatment plant. Excess wet weather flows are discharged as CSOs via 28 permitted outfalls to receiving waters, namely Newark Bay, Kill Van Kull and Upper New York Bay.
Through its CSO discharge permit under the NJDEP, the City of Bayonne was required to cooperatively develop an integrated regional CSO Long-Term Control Plan (LTCP) with PVSC and its seven hydraulically-connected CSO permittees. On behalf of the City, SUEZ (now Veolia) engaged T&M to prepare the Bayonne portion of the LTCP documents in cooperation with PVSC and its district permittees. The project was a multi-year program with goals for reduction of CSO volumes, frequencies and pollutant loads in compliance with regulations and water quality requirements.
T&M services in preparing the CSO LTCP included review of existing data and reports; field investigation; public participation; regulatory support; sewer collection system modeling involving system characterization and optimization; assessment of current and future CSO flow conditions; technology screening; evaluation of a wide-range of CSO control alternatives involving gray and green infrastructure and associated costing; final selection of a CSO control alternative; and production of relevant reports and documents to support the regional LTCP for the PVSC sewer district.
