Details: The Lower Harbor Brook CSO Conveyances and Storage Facility Project is a 4.9 million gallon combined sewer overflow storage facility that will be located on County owned property on State Fair Boulevard between Hiawatha Blvd. and West Genesee Street in the City of Syracuse. The facility will capture and store the overflows from CSO’s 003, 004 and 063 for up to the 1-year, 2-hour design storm event. After the storm event subsides, the contents of the Storage Tank will be pumped to the existing Harbor Brook Interceptor Sewer for conveyance to the Metropolitan Treatment Plant (Metro) for full treatment. The project also includes construction of CSO conveyance pipelines on State Fair Blvd., Hiawatha Blvd. and Erie Blvd. to convey combined sewage from the overflow regulators to the storage tanks during rainfall and snowmelt events. Floatables and grit removal will be included in this facility. Odor control provisions will be incorporated into the facility design and the tank will be completely enclosed.
Green Components: To further enhance the sustainability of the facility, the project includes green infrastructure components. The stormwater runoff from the rooftops of the storage tank and controls building will be stored within the CSO storage tank and used for a second and third cleaning flush of the tank. This water will ultimately be treated at Metro eliminating the need for this stormwater to be treated on-site. The stormwater storage is designed to capture the 100-year storm (5.2 inches) from the tank and the control building rooftop.
Project Update (Sept 2012): Conveyances – The contractor continued work on the conveyance sewers from CSO 003 and 004 that will transmit combined sewage during wet weather events to the new storage tank. The contractor completed the restoration of Hiawatha Boulevard including the installation of paving, curbing and sidewalks and completed backfilling of the sewer installation from MH-1 to MH-2 on the CSO 003 section of the conveyance pipeline. The contractor conducted work on the State Fair Blvd. section of the project by installing the piles and pile cap for MH-SF2 and installing the piles at the receiving wall for the tunneling work under the State Fail Blvd. Bridge over Harbor Brook.
Storage - The contractor completed the bracing and poured the concrete for the junction chamber and installed the sheeting and drove piles for the 54-inch conveyance sewer to CSO 004. All permeation grouting work was completed along with demobilization of the subcontractor and the contractor began to mobilize for slurry wall installation in September. The storage facility will store combined sewage from the three CSOs (003, 004 & 063) during storm events.
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