George Davis Creek Fish Passage Culvert Project

Picture of George Davis Sediment Pond at ELSP.jpg

Project Description

The City is investigating the feasibility of building a new fish passable culvert under East Lake Sammamish Parkway, removing other fish passage barriers, and daylighting George Davis Creek from its mouth at Lake Sammamish to the east side of East Lake Sammamish Parkway.

George Davis Creek is of great importance to the City of Sammamish, draining Inglewood Basin to Lake Sammamish. The creek is located in the heart of the City, roughly south and parallel to Inglewood Hill Road in the upper reaches, and flows into Lake Sammamish near NE 7th Court.  The creek’s riparian corridor is largely undeveloped and contains ideal habitat for Kokanee and other salmon, as well as trout.  Currently, a series of fish passage barriers on and downstream of East Lake Sammamish Parkway restricts migrating fish from access to nearly one river mile of quality riparian habitat in George Davis Creek.

The first phase of the project is a preliminary feasibility study to investigate alternatives available to the City to remove or bypass the fish passage barriers. This will involve investigating alternative, nearby outfalls and partnerships with local homeowners.

This feasibility study and generation of preliminary design options for the George Davis Creek Fish Passage Project will occur in 2018 and 2019.  Final design, permitting, and easement acquisition for the George Davis Creek Fish Passage Project will occur in 2019 and 2020.  Construction is planned for the fish passage window during the summer of 2020.

Project Updates (updated SEP 19, 2018)

The City has selected and is teaming with PBS Engineering and Environmental as the design consultant for this project.  PBS brings a deep technical background and a wealth of experience, having designed countless fish passage culverts throughout Puget Sound and Lake Sammamish. 

The project team is currently collecting data and performing analyses to generate three feasible alternatives that would restore fish passage to George Davis Creek.  The team is also meeting with various project stakeholders whose participation and consent will allow this project to proceed. Stakeholders include local property owners, utility companies, regulatory agencies such as US Army Corps of Engineers and Washington State Department of Fish and Wildlife, the Snoqualmie and Muckleshoot Tribes, King County Parks Department, and others. 

The City is hosting the first public meeting for this project on Thursday, October 11th, 2018, at Sammamish City Hall Council Chambers. The purpose of the meeting will be to inform local property owners of the project scope and goals, work to-date, and possible impacts to property that may result.  We also would like to solicit public feedback and concerns about the project. Although any citizen may attend, we would most like to hear the input of local property owners along East Lake Sammamish Shore Lane, East Lake Sammamish Parkway (in the vicinity of Louis Thompson Hill Rd) and NE 7th Ct. 



May 2018 – City sends out Request for Proposals (RFPs) to select consultants

June 2018 – City interviews consultants, contract and scope of work are finalized

July 17, 2018 – Contract award by City Council

August 2018 – Project Kick-off

October 11, 2018 - Public Meeting for property owners on E Lk Sammamish Shore Lane, ELSP, and NE 7th Ct. 

Fall 2018 through Spring 2019 – Alternatives analysis, preliminary design, and stakeholder meetings

Spring 2019 through Spring 2020 – Final engineering design, easement acquisition, permitting, environmental studies

Summer 2020 – Construction


The estimated cost of design services during the first, preliminary stage, is $75,000.  Engineering design to take the project from the 10% design level to final design level is anticipated at an additional $400,000 to $500,000.  Construction costs are estimated between $2.5M and $3.5M.

Staff Contact