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Seattle Public Utilities (SPU) is currently working on two projects in the Delridge neighborhood. This project will improve the sewer system, and the other will create a natural drainage system.
Construction on the two sewer improvement projects is now complete and both combined sewer overflow (CSO) sites will be fully operational by the end of the year.
Now that construction is complete, you may notice a few remaining activities in the area:
Thank you for your patience during construction.
The combined sewer overflow (CSO) tanks — one at the corner of Delridge and Orchard (CSO 2 fact sheet (pdf)) and the other at the corner of 22nd and Henderson (CSO 3 fact sheet (pdf)) — were built in the 1980s and, due to their age, did not operate as efficiently as originally designed.
SPU crews replaced the control systems at both CSO sites. Fixing these facilities will: