Promontory Point Sewer Repair Project

News & project updates

October 31, 2017

The majority of the work for this project is complete. The contractor is working on punchlist items like restoration, and has begun planting.


This project provided a permanent sanitary sewer replacement for affected homes located in the Promontory West subdivision. The previous sanitary sewer main, located along the northeast portion of the pedestrian trail near 102nd Ave NE, was damaged by landslide events. A temporary lift station maintained sanitary sewer service for the affected homes until the new sewer was installed.

Design solutions

We contracted with HWA GeoSciences to study the geologic aspects of the landslides.  Then we hired Gray and Osborne as the City's design consultant, who proposed several design solutions. We looked closely at reliability, geotechnical concerns, maintenance, and cost. The location of the replacement sewer main minimizes ground disturbances and ties into an existing gravity-fed sewer line. 

Affected owners

The City began working with property owners in 2013 to negotiate for the property rights to acquire a utility easement. 

Contractor chosen

The City received three bids for this project at its May 10 bid opening. Dungeness Construction Corporation submitted the lowest bid of $197,934. 
At their June 13 meeting, City Council gave approval to award this contract to Dungeness.