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Lake Hills and NW Lake Sammamish sewer upgrade
Please see the Public involvement page for a list of community meetings and meeting materials (agendas, presentations, summaries, etc.).
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Construction expected to begin in 2024, Spring 2022
Fieldwork along sewer alignment scheduled to begin the week of March 21, March 21, 2022
Delays and increased congestion on and near West Lake Sammamish Parkway beginning as early as November 1, October 28, 2021
Summer 2021 Project Newsletter, August 2021
Summer 2020 Project Newsletter, August 2020
Expect delays and increased congestion on and near West Lake Sammamish Parkway starting as early as July 13, July 8, 2020
Fall 2019 Project Newsletter, October 2019
Join us at Bike Everywhere Day on May 17! May 10, 2019
Catch up on our design process and read about what's next!, August 2018
Join us at Bike Everywhere Day on May 18! May 11, 2018
Expect short delays on West Lake Sammamish Parkway and residential streets beginning March 20, March 14, 2018
Online Open House archive (December 2017 - January 2018), February 6, 2018
Stop by the online open house to review and comment on the latest project designs! December 5, 2017
Final design for the Lake Hills and NW Lake Sammamish Sewer Upgrade Project begins, November 2017
Join us for drop-in sessions in November!, November 1, 2017
Expect increased noise and activity in Luke McRedmond Landing starting as early as Oct. 16, October 9, 2017
Soil sampling in ravine scheduled to begin as early as September 7, August 31, 2017
Soil sampling on 180th Ave. N.E. continues September 6, August 29, 2017
Contractor moving to Sammamish River Trail this week. Sampling on West Lake Sammamish Parkway complete, August 15, 2017
Soil samples begin on 180th Avenue August 14, August 9, 2017
Soil samples continue August 7 on West Lake Sammamish Parkway, August 2, 2017
Expect lane and sidewalk closures, short delays on West Lake Sammamish Parkway and local roadways starting as early as July 31, July 27, 2017
Soil samples starting July 31 on West Lake Sammamish Parkway and 177th Ave NE, July 27, 2017
Sammamish River in-water survey work north of the Leary Way Bridge week of July 5, June 28, 2017
Expect short roadway and trail delays during utility investigations starting as early as Monday, April 24, April 18, 2017
Fieldwork efforts nearing completion – alignment for new sewer pipe to be finalized in early 2017, November 29, 2016
Geotechnical work this week, WTD's GoGreen booth a hit, and Pokemon, don't Go here! July 25, 2016
Geotechnical work begins June 23 in Idylwood for King County’s sewer upgrade project in Redmond, June 22, 2016
Project update, June 8, 2016
Project update, February 2016
Project news, January 2016
King County touring your area, April 24, 2015
- The Plan for Trees, March 2021
- Project overview, May 2019
- What is microtunneling? August 2018
- Planning ahead for construction on the Sammamish River Trail, May 2017
- Planning ahead for traffic changes during construction, May 2017
- How we build, April 2017
- How we design, April 2017
Preliminary Tree Protection Plan, March 2019
This document is currently being updated as the project design progresses. We cannot guarantee that trees shown for protection in this plan will not need to be removed in construction.
SEPA environmental checklist, issued August 15, 2018
Learn more about environmental review by viewing the August 2018 project update.