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Sewer Separation Project at CSO Area 061

Status: Completed
GI Technology: Bioswale
Project Year: 2016

Sewer Separation CSO061

Project Description:

The CSO 061 Area includes 1.8 acres within a residential neighborhood in the south side of the City of Syracuse.  During large rain events, the combined sewage from the Crehange Street combined sewer can overflow to an existing 12-inch outfall to Onondaga Creek (CSO 061).

The project design included construction of a new storm sewer along Crehange Street to convey tributary stormwater from the Crehange Street properties, as well as two catch basins that are tributary to the Hatch Street combined sewer.  The CSO-061 outfall was repurposed and utilized for stormwater discharge only. The existing sanitary sewer along Crehange Street conveys sewage only and the Hatch Street combined sewer has reduced stormwater contributions.

The County evaluated the use of Green Infrastructure for mitigating overflows at CSO-061.  It was concluded that complete separation would be more effective than green infrastructure due to the short conveyance distance, proximity to Onondaga Creek, and the desire to implement a total closure of CSO 061.

The project began Monday November 7, 2016 and was completed December 5, 2016.

Download project details below:

CSO061 Fact Sheet



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