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Lower Coal Creek Flood Reduction

To address flooding issues in the Newport Shores neighborhood, the City of Bellevue and the King County Flood Control District have jointly worked with an engineering team and members of the public to select two projects to reduce flood risks. One project will address Lower Coal Creek flooding, and the other project will address localized stormwater flooding.

Map of Lower Coal Creek and Project Area
Flooding in Newport Shores   An existing Lower Coal Creek culvert

Project Status
The flood reduction effort is now in its second phase, which includes design, permitting, and construction of two flood risk reduction proejcts.

Status of Flood Risk Reduction Projects

  • To reduce the risk of Lower Coal Creek from flooding, new bridges will be constructed at five locations in the neighborhood. Right of Entry letters are being sent to the 20 property owners who live adjacent to the five locations. Later this summer surveyors and the design team will gather data at each of the five crossings to guide the design of the bridges.

  • To minimize the flooding that occurs in the streets during heavy rains, the current storm pipes will be disconnected from Lower Coal Creek and rerouted to new outfalls discharging into Lake Washington. Stormwater will be treated to remove fine sediment before discharging to Lake Washington. The project team is continuing to look for property owners living next to Lake Washington on Skagit Key that are willing to let the project team evaluate the feasibility of a new stormwater outfall along the edge of their property. If the evaluation shows that a property is feasible, then the City of Bellevue would offer fair market value for an easement, based on a property appraisal. If a mutually acceptable agreement can be reached, the City would work with the property owner on the timing of construction and any other concerns, and would restore the property when work was complete.

Upcoming Activities
The following are the anticipate schedule of events:

2015 – 2017  Final design and permit acquisition.
2017 – 2019  Construction of new culvert/bridges and stormwater outfalls.

Project History

Fall/Winter 2013  Engineering study of existing conditions; initial contact with public.
Winter/Spring 2014  Alternatives analysis, public involvement.
2014  Select preferred alternative(s); finalize pre-design and details of preferred alternative(s); community meeting to discuss preferred alternatives.
Winter/Spring 2015  Selection of engineering design team.

Public Involvement
The City of Bellevue hosted a booth at the City’s Spring Forward Expo in April 2013 and had meetings with the Newport Shores Homeowners Association in October 2013 and March 2014. The City of Bellevue hosted a Public Forum on May 12, 2014 at the Newport Shores Yacht Club to hear the public’s thoughts on potential alternatives. Additional public outreach is being planned for future stages of the project, and will include website updates as well as potential community forums and field trips.

How can I stay informed?
This page 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:
Brian Ward
Project Manager, Stormwater Systems Hydrologist

Contact Information

P.O. Box 90012
Bellevue, WA 98009
Contact: Brian Ward
Phone: 425-452-5206
E-mail: bward@bellevuewa.gov

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