Monday, December 12, 2016

Spokane City's Largest CSO Projects Starting Soon

The City of Spokane is embarking on its largest Combined Sewer Overflow (CSO) tank yet. According to the City of Spokane website, CSO 24 will have the capacity to hold over 2,000,000 gallons of combined sewage. Construction on this tank will begin in mid-January on land to the west of Adams Street between Sprague and 1st Avenue. The map below was borrowed from a City presentation and shows initial traffic impacts. Click to view it full size.

Once CSO 24 is complete it will collect combined sewage from most of the south hill and the west part of downtown Spokane. This project will be built in three phases. Phase 1 will start in January and includes all the preliminary work for the tank. Phase 2 is the construction of the CSO tank and will take 18 months to complete. Currently, Phase 3 is in the design phase and includes the landscaping work which will be above the tank.


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About SRTC

SRTC is the federally designated Metropolitan Planning Organization (MPO) for Spokane County. Urbanized areas with populations exceeding 50,000 people are required to have an MPO. SRTC was formed to address the county's transportation planning needs. It provides coordination in planning between the public, cities, small towns, the county, the state, transit providers, and tribes.

SRTC offers services including transportation monitoring, transportation modeling, census information analysis, travel demand forecasting, historical traffic count analysis, geographic information systems, and trip generation rates.