Library
North Mercer Island/Enatai 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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- Updated Bike Detour Map available, February 2023
- Enatai Siphon pipe installation is complete! December 19, 2022
- See you at the Mercer Island Farmers Market! August 17, 2022
- Construction schedules often change – check our website for the most up to date information! August 12, 2022
- Summer newsletter available online, check your mailbox or nearby flyer box! July 26, 2022
- Newsletter - Major sewer construction activities continue this summer and fall in Mercer Island and Bellevue, July 2022
- Watch out! Cycling in a construction zone is dangerous! Proceed with caution to keep us all safe! July 22, 2022
- The construction hotline is back in service; meet us at the Mercer Island Farmers Market this weekend! June 14, 2022
- The North Mercer Island/Enatai construction hotline is down. Please use our temporary hotline number. June 9, 2022
- Construction work on the I-90 trail will begin as early as June 8, June 2, 2022
- Surveying continues/utility locates beginning in May, May 4, 2022
- Construction equipment and activity coming to Mercer Island Boat Launch, April 22, 2022
- Visit our pre-construction online StoryMap, April 6, 2022
- Sewer construction starting soon! March 2, 2022
- Newsletter - Sewer construction starts this spring! March 2022
- Newsletter - Construction Ahead, April 2021
- Construction Reference Guide, April 2021
- Utility work on SE 35th Place between E. Mercer Way and Briarwood Lane planned for early February, January 25, 2021
- Utility work on 78th Avenue Southeast planned for late December 2020, December 14, 2020
- Utility work on 90th Place Southeast planned for late November 2020, November 23, 2020
- Field investigations starting as early as April 22 near Mercer Island Boat Launch and Enatai Beach Park, April 21, 2020
- Field investigations near Sweyolocken Pump Station starting as early as January 9, January 7, 2020
- Tree and site survey along I-90 Trail and North Mercer Way starting as early as December 9, December 6, 2019
- Fieldwork at Luther Burbank Park starting as early as May 20, May 17, 2019
- Fieldwork at Mercer Island Boat Launch starting as early as May 20, May 17, 2019
- Construction and restoration on the I-90 Trail, Spring 2019
- Join us at Bike Everywhere Day on May 17! May 10, 2019
- Tree survey near I-90 Trail and North Mercer Pump Station starting as early as April 22, April 19, 2019
- Newsletter, March 2019
- Field investigations starting as early as March 4 in Enatai Beach Park and Sweyolocken Pump Station, March 1, 2019
- Utility locates, potholing, and surveying in North Mercer Island beginning as early as January 3, December 28, 2018
- Field investigations starting as early as December 3 near Bellevue shoreline, Enatai Beach Park and Sweyolocken Pump Station, November 20, 2018
- Tree survey work beginning November 5, October 30, 2018
- In-water fieldwork along Bellevue shoreline starting July 18, July 16, 2018
- Join us at Bike Everywhere Day on May 18!
- Field investigations starting as early as April 16 on Mercer Island, April 10, 2018
- Field investigations starting as early as April 12 in Enatai Beach Park and Mercer Slough, April 10, 2018
- Field investigations next to I-90 Trail and on SE 35th Place starting on Wednesday, April 4, April 2, 2018
- The online open house is live! Stop by to review the detailed sewer upgrade route, March 1, 2018
- Field investigations starting as early as January 24 in Mercer Island and Bellevue, January 22, 2018
- Survey work on Mercer Island January 8-12; Expect delays along North Mercer Way, January 3, 2018
- Potholing to locate underground utilities is underway. Expect delays along North Mercer Way. December 15, 2017
- Fact sheet: Keeping sewage flowing during construction (Grinder Pumps), November 2017
- Sewer route details come into focus, July 2017
- Survey notification, July 2017
- In-water survey work near Enatai Beach Park and Mercer Island Boat Launch starting June 21, June 15, 2017
- Fact sheet: Installing King County’s new sewer pipeline in North Mercer Island/Enatai, April 2017
- Newsletter, January 2017
- Post card: Join us for an upcoming community meeting (January 25 and 26), January 11, 2017
- Soil sampling resumes on Mercer Island starting November 30, November 23, 2016
- Final alignment decision expected by year’s end, November 15, 2016
- Soil sampling on 96th and 97th avenues southeast starting as early as Tuesday, November 1, October 28, 2016
- Soil sampling starting as early as Thursday, October 27, October 21, 2016
- Survey work begins on Mercer Island September 19, September 16, 2016
- Early design for King County’s North Mercer Island and Enatai Sewer Upgrade Project, August 2016
- Field investigations move into the East Channel week of August 8, August 3, 2016
- Field investigation update and changing of the guard, August 1, 2016
- Geotechnical work to begin in Bellevue, Week of July 11, 2016, July 5, 2016
- King County begins field investigations at North Mercer Island and Southwest Bellevue in June 2016, June 1, 2016
- North Mercer Island/Enatai sewer upgrade newsletter, Summer 2015
- King County continues field investigations in your neighborhood April 20, April 15, 2015
- King County continues field investigations in your neighborhood April 13, April 8, 2015
- Construction and restoration on the I-90 Trail
- Construction Vibrations
- Enatai Beach Park
- Enatai Siphon: Installing a new pipeline under the Enatai Hillside
- Fruitland Landing and 97th Avenue Southeast
- Mercer Island Boat Launch and work across the East Channel of Lake Washington
- Mercer Slough and the Sweyolocken Boat Launch
- North Mercer Pump Station Upgrade
- Odor Control
- Open cut construction on residential streets
- The Plan for Trees
- Construction Reference Guide, April 2021
- Final pipeline route, December 2018
- Recommended alternative, November 2016
- Service area
North Mercer Enatai: Construction tour, June 2021
North Mercer Island/Enatai Sewer Upgrade Project: Our Shared Sewer System, March 2021
- March 8, 2018 -- Ask questions, get answers on the North Mercer Island/Enatai sewer upgrade project
- Arborist Report: Mercer Island, issued September 2019
- SEPA-DNS environmental checklist for North Mercer/Enatai Sewer Upgrade Project, issued May 23, 2019
- Transportation Study, September 2018
- SEPA-DNS environmental checklist for North Mercer/Enatai Interceptor Inspection, issued May 15, 2018