Lower Coal Creek Flood Hazard Reduction

Flooding at the Glacier Key CulvertThe King County Flood Control District has provided funding to the City of Bellevue to address flooding issues in the Newport Shores neighborhood.

Schedule of Activities

The Lower Coal Creek flood reduction effort is divided into three groups and will aim to follow this schedule:

  • Group 1 – Upper Skagit Key Bridge Construction (Culvert Replacement)   
    • 2015-2017 - Design, easement, and permit acquisition (complete)
    • 2017 – Construction (culvert replacement) (complete)
  • Group 2 – Cascade Key and Newport Key Bridge Construction (Culvert Replacements)
    • 2017-2018 - Design, easement, and permit acquisition for new bridges (complete)
    • 2018 and first few months of 2019 – Construction of culvert replacements (underway)
  • Group 3 – Glacier Key and lower Skagit Key Bridge Construction (Culvert Replacements)    
    • 2017-2019 - Design, easement and permit acquisition (under way)
    • 2019 and first few months of 2020 – Construction of culvert replacements       
             

Reduce Creek Flooding

Lower Coal Creek outfalls and bridgesLower Coal Creek outfalls and bridgesUpdated August 2018
Bellevue is currently building new bridges at Newport Key and Cascade Key to reduce flooding from Coal Creek by improving its flow of water, especially during big storms. The loudest part of the construction (drilling the shafts to support the bridges) was completed earlier in the summer.

During the week (Monday through Friday), construction crews are permitted to work from 7 a.m. to 4 p.m. During the fall, construction may need to take place on Saturdays after 9 a.m. If Saturday work needs to occur, advance notice will be provided to adjacent residents. The Construction Inspector, Brian James, will be on site every day and can be reached at 206-423-9451 or bjames@bellevuewa.gov if residents have any questions or concerns about construction.

Below are updates specific to each bridge project.

  • Newport Key Bridge: Newport Key is expected to reopen to traffic and pedestrians in October 2018. However, the bridge construction will likely continue through December 2018. The new bridge at Newport Key will look very similar to the bridge constructed last year on Skagit Key.
  • Cascade Key Bridge: The full lane near Coal Creek is expected to re-open in October, but construction will continue through December 2018. While school is in session, there will be flaggers during peak hours to help control the flow of traffic. During other times, cars and pedestrians will continue using the temporary traffic light. The new bridge at Cascade Key will look very similar to the bridge recently on Skagit Key, except it will be constructed at the same level as the existing road (not raised).

In addition to constructing the bridges at Newport and Cascade Keys, Bellevue is working on the engineering designs for new bridges at Glacier Key and lower Skagit Key (where Skagit Key crosses Coal Creek near Lake Washington). The city is intending on constructing these new bridges starting in the summer of 2019. In the fall, Bellevue will start reaching out to residents regarding obtaining temporary easements for these construction efforts (note: Bellevue will not need any permanent easements for the bridges at Glacier and lower Skagit Keys). The bridge at Glacier Key will have a raised road with a sloped ascent and descent, whereas the bridge at lower Skagit Key will not be raised.

Project Monitoring
After the bridges are constructed, there is the potential for the asphalt to settle into the ground due to the area’s poor soils. If settlement occurs, the City will come back and repave parts of the road. An analysis showed this was the most cost-effective solution to the possibility of settlement. If residents notice that the asphalt has settled more than a ½ inch at the bridges’ edges, please contact Jim Stockwell, Project Manager at 425-452-4868 or jstockwell@bellevuewa.gov.

Reduce Street Flooding

Updated August 2018
Bellevue was initially planning on rerouting storm drains away from Coal Creek to reduce the risk of flooding in the streets of Newport Shores. However, the City was unable to obtain permanent easements for new storm drain outfalls into the Grand Canal and into Lake Washington. Since Bellevue has not been able to get the outfall easements, there still may be some flooding in the roadways of Newport Shores moving forward.

Public Outreach

Community meetingThroughout construction, Bellevue will stay in touch with residents by sending emails, updating the project website, and publishing articles in the Newport Yacht Club newsletter. As needed, the Construction Inspector will hand out flyers to residents if they are home and will ask the Newport Yacht Club to communicate with residents he is unable to directly reach.

Previous Public Outreach:        

  • In May 2018, Bellevue held meetings with the neighbors near the Cascade Key and Newport Key bridge construction sites.
  • In May 2018, Bellevue set up an informational booth at the Newport Yacht Club to answer questions about the construction projects at Cascade and Newport Keys.
  • In December 2017 the project team made a presentation to the NYC HOA Board about the Lower Coal Creek Flood Hazard project. The purpose of the meeting was to educate new Board Members on the scope of the project, the goals of the project and the current status of the project.
  • In November 2017, the City held a community meeting to hear from residents about their experiences during the construction of the bridge at upper Skagit Key. The City wanted to learn how to best mitigate construction impacts in summer 2018 when it constructs new bridges at Cascade Key and Newport Key. Please see the November 15, 2017 community meeting summary and map exercise of preferred communication methods.
  • In September 2017, the city gave a presentation to Newport Shores residents regarding the proposed project to build a new stormwater outfall at the Newport Yacht Club. View the presentation, fact sheet, and design package from this meeting.
  • In May 2017, residents living near the upper Skagit Key bridge met with city staff to discuss the upcoming bridge replacement project. They learned about potential construction impacts and the steps Bellevue is taking to reduce construction-related nuisances over the summer.
  • In May 2016, nearly 40 Newport Shores residents attended an open house to learn about, provide feedback on, and ask questions about the Lower Coal Creek Flood Hazard Reduction Project and other infrastructure efforts in Newport Shores.
  • In May 2014, the city hosted a public forum at the Newport Yacht Club to hear the public’s thoughts on potential alternatives.
  • In March 2014, the city had a meeting with the Newport Yacht Club Association.
  • In October 2013, the city had a meeting with the Newport Yacht Club Association.
  • In April 2013, the city hosted a booth at the its Spring Forward Expo.

Other public outreach activities are being planned for future stages of the project. This will include updates to this webpage, updates in the Newport Yacht Club Association’s newsletter, as well as future community forums and potential field trips.

Project History

Below is an overview of the history of the Lower Coal Creek flood reduction effort.

Summer 2018 Construction of the new bridges at Cascade Key and Newport Key; begin design work for the bridges at Glacier and lower Skagit Key.
Winter and Spring 2018 Completion of the designs for the new bridges at Cascade Key and Newport Key (Group 2); communication with the Newport Yacht Club HOA and property owners near the proposed Grand Canal outfall regarding obtaining easements.  
Fall 2017  Completion of construction of the new bridge at upper Skagit Key; start 90% design of Group 2 and work with property owners near the Cascade Key and Newport Key culverts; communicate with the Newport Yacht Club HOA and property owners near the proposed Grand Canal outfall regarding obtaining easements.
Summer 2017 Construction of the upper Skagit Key bridge. Begin design of the bridges at Cascade Key and Newport Key and the Grand Canal outfall (Group 2 projects).
Spring 2017 Finalization of “100% plan and design” document for the Upper Skagit Key bridge.
Winter 2016 Finalization of the “60% plan and design” document for Upper Skagit Key bridge.
Fall 2016 Finalization of the “30% plan and design” document for five culvert replacements.
Summer 2016 Submittal of Army Corps of Engineers permit and completion of the draft “30% plan and design” document.
Fall 2015 / Spring 2016 Preliminary bridge design.
Summer/Fall 2015 Contracting and field investigations.
Winter/Spring 2015 Selection of engineering design team.
2014 Select preferred alternative(s); finalize pre-design and details of preferred alternative(s); community meeting to discuss preferred alternatives.
Winter/Spring 2014 Alternatives analysis, public involvement.
Fall/Winter 2013 Engineering study of existing conditions; initial contact with public.

How can I stay informed?

This webpage offers the most up-to-date information on the project. Additional materials and project information will be posted on the site as the project develops. For more information, please contact:

Debbie Harris, Project Manager
425-452-4367
DHarris@bellevuewa.gov

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