Seattle makes significant progress on underground stormwater storage tunnel
(UI) – On June 26, King5 reported that a “significant portion of the construction work” for an underground stormwater and sewage tunnel has been completed in Seattle. The tunnel is part of the Ship Canal Water Quality Project, which aims to keep stormwater and sewage from polluting Seattle waterways. The project is joint effort between Seattle Public Utilities and the King County Wastewater Treatment Division.
According to King5, the tunnel will hold stormwater and sewage that overflows during heavy storms until it’s ready for treatment. The work was completed by a tunnel-boring machine dubbed “MudHoney.” The machine will be taken apart and sold back to its manufacturer in Germany.
Historically, the area (spanning from Ballard to Wallingford) worked with a “combined sewer system,” which caused water to overflow into the Ship Canal. The system will help quell environmental concers associated with the stormwater and sewage overflow, with King Country WTD Director Kamuron Gurol saying the project is “better for salmon, better for orcas and better for people.”
This story was originally reported by King5.
Related News
From Archive
- Inside Sempra’s 72-mile pipeline with 18 major trenchless crossings
- Trump vetoes bill to finish $1.3 billion Colorado water pipeline
- PHMSA warns of heat risks in aging plastic gas distribution pipelines following deadly Pennsylvania explosion
- Infrastructure failure releases 100,000 gallons of wastewater in Houston; repairs ongoing
- OSHA seeks $1.2 million fine after fatal trench collapse in Connecticut
- Worm-like robot burrows underground to cut power line installation costs
- First tunnel boring machines complete testing for Hudson Tunnel Project
- Infrastructure failure releases 100,000 gallons of wastewater in Houston; repairs ongoing
- Construction jobs stumble into 2026 after weak year
- NWPX grows water infrastructure portfolio with Colorado precast facility

Comments