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Henderson CSO - Concrete
Project Information
- Project Location:
- Seattle, WA
- Status:
- Completed
- Structure Type:
- Mixed Use
Scope Of Work
The Henderson CSO Reduction project involved construction of an underground combined sewer overflow structure for the City of Seattle. In a rain event, the structure captures and stores sewer/storm-water in an effort to prevent release of it into Lake Washington. The challenge of this project was made more complex by its site location between the shore of Lake Washington and residential homes. This only allowed for crane access on one side of the structure, which resulted in concrete pumping and material delivery challenges, and unorthodox construction practices. The project required mass concrete placements, including 6 ft. thick slabs with thermal control monitoring. The 4 ft. thick walls required a one-sided form system. Overall the project required the 10,000 cubic yard structure to be completed in 6 months.
