Construction work underway at North Beach CSO site

The My Ballard team received an update from King County about the current construction work that is underway at the North Beach Combined Sewer Overflow (CSO) Control Project site.

King County’s contractor, Stellar J Corporation, is currently digging a trench for the CSO storage tank. Crews are scraping excess material (“scale”) from the shoring panels to create a uniform, flat surface for the storage tank walls. The contractor has also changed methods for removing scale to reduce noise in response to neighbor concerns.

As the excavation continues, the contractor will pour concrete for the tank and the mechanical and electrical building. The excavation, shoring panel scraping, and concrete pouring is expected to continue through early December.

During excavation, shoring panel scraping, and concrete pouring neighbors can expect:

  • Construction work hours from 7 a.m. until 6 p.m. on weekdays, and 9 a.m. to 6 p.m. on Saturdays.
  • Noise from excavating and hauling equipment, including backup alarms. The contractor has installed less-intrusive broadband alarms on their equipment, but third-party trucks may not be equipped with these alarms.
  • Use of a grinding machine to scrape extra material from the shoring panels.
  • Increased truck traffic entering and leaving the site. Trucks will access the site on 24th Avenue NW and 28th Avenue NW.
  • Concrete trucks to continue running while concrete is poured to prevent the concrete from hardening.

Crews will not be working over the Thanksgiving holiday on Thursday, November 27, and Friday, November 28. Crews will be on site on Saturday, November 29, from 9 a.m. – 6 p.m. to prepare for work the following week.

If you have any questions about the project email Monica Van der Vieren at or call the 24-hour construction hotline at (206) 296-7372.

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