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Building inclusive, safe and livable neighborhoods and communities.

ONI Main: 503-823-4519

City/County Info: 503-823-4000

TDD: 503-823-6868

1221 SW 4th Ave, Suite 110, Portland, OR 97204

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Inverness Force Main Construction Update: April 20, 2017

Inverness Force Main Construction Update: April 20, 2017

Bike/Pedestrian bridge closure extended to May 15

The Inverness Force Main is an 11-mile pressure sewer that carries sewage from northeast Portland to the Columbia Boulevard Wastewater Treatment Plan. The 36-inch line splits into a 20-inch and a 30-inch pipe about two miles east of the plant. Both sections are suspended underneath the Columbia Slough Pedestrian Trail Bridge, which Environmental Services constructed. When maintenance crews found the leak in the 30-inch pipe two years ago, all flow switched to the 20-inch pipe and plans for repairs began.


  • The Columbia Slough Bike/Pedestrian Trail Bridge will be closed two weeks longer than originally anticipated due to delay in arrival of a critical component to complete the work. Once the repair work is complete, the excavations on each end of the bridge will be restored and the bike and pedestrian bridge will reopen.
  • There will be a period of inactivity for up to a month while another piece of specialized equipment arrives from overseas in mid-June. This final piece will take several days to install and will not require the bridge to be closed.
  • The Inverness Force Mains will both be operational by the end of June.

To see a project map with a suggested bike and pedestrian detour, go to

If you have any questions, please don’t hesitate to contact me.

Debbie Caselton

Community Outreach

City of Portland Environmental Services

1120 SW Fifth Ave Room 1000, Portland, Oregon 97204

Phone: 503-823-2831


Working for clean rivers

The Bureau of Environmental Services works with Portland residents and businesses to protect water quality, public health, and the environment through wastewater collection and treatment, sewer construction and maintenance, stormwater management, and stream and watershed restoration. Learn more at

The City of Portland complies with all non-discrimination laws including Title VI (Civil Rights) and Title II (ADA). To request a translation, accommodation or additional information, please call 503-823-7740, or use City TTY 503-823-6868, or Oregon Relay Service: 711