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 Newport Shores residents to select a project with two components to reduce flood risks. The first component will reduce Lower Coal Creek flooding, and the other component will reduce street flooding.
Map of Project Area
|Flooding in Newport Shores
||An existing Lower Coal Creek culvert
See below for the schedule of activities, information about the current phase, and updates on the two components of the Lower Coal Creek flood reduction project.
Schedule of Activities
The Lower Coal Creek flood reduction effort will follow this schedule:
- 2015 – 2017: Final design and permit acquisition.
- 2017 – 2019: Construction of new bridges (culverts) and stormwater outfalls.
The flood reduction project is now in its second phase. As the diagram below shows, the project is currently being designed and permitted.
Reduce Creek Flooding
To reduce the risk of Lower Coal Creek flooding, new bridges will be constructed at five locations in the neighborhood. These new bridges will increase hydraulic capacity, reduce the chance of debris getting clogged, and eliminate the partial fish passage barrier that currently exists at Cascade Key. The bridges will all be designed in accordance with the Washington Department of Fish and Wildlife’s Water Crossing Design Guidelines.
To gather data to design the five new bridges, the City of Bellevue has requested temporary Right of Entry agreements with the property owners who live adjacent to the five proposed bridge locations. The City of Bellevue has received several signed Right of Entry agreements from Newport Shores residents (see map at right for the status of agreements that have been received to date). If you have received a letter requesting a Right of Entry for this effort, please review and return the signed letter to Hannah Peshkov (mail the signed letter to 450 110th Avenue NE, Bellevue, WA 98009 or scan and email the signed letter to firstname.lastname@example.org). If you have any questions or concerns about these Right of Entry letters, please contact Brian Ward (email@example.com or 425-452-5206).
Field work will begin in the fall of 2015. In late September or early October, the project team (the City of Bellevue and the design consultant team) will begin surveying the bridge sites. In October, the project team will begin geotechnical work to determine soil conditions adjacent to bridge crossings, as well as work to precisely locate buried utilities. Please take extra caution while driving, walking, or biking around the equipment.
Reduce Street Flooding
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 that will discharge 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, the City of Bellevue would then 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.
The City of Bellevue hosted a booth at the City’s Spring Forward Expo in April 2013 and had meetings with the Newport Yacht Club Association in October 2013 and March 2014. The City of Bellevue hosted a Public Forum on May 12, 2014 at the Newport Yacht Club to hear the public’s thoughts on potential alternatives. Additional public outreach is being planned for future stages of the project. This will include updates to this website, updates in the Newport Yacht Club Association’s newsletter, as well as future community forums and potential field trips.
Other Lower Coal Creek Efforts
In the fall of 2015, the Washington Department of Fish and Wildlife (WDFW) will be conducting salmon surveys in Lower Coal Creek. This is a separate effort from the flood reduction effort. These WDFW salmon surveyors will remain within the drainage easements in the creek. Seasonal information from these surveys is available on Bellevue Utilities' Storm and Surface Water page. If you have questions or concerns about this salmon surveying effort, please contact Kit Paulsen (firstname.lastname@example.org or 425-452-4861) or Laurie Devereaux (email@example.com or 425-452-5200).
Below is an overview of the history of the Lower Coal Creek flood reduction effort.
|| Engineering study of existing conditions; initial contact with public.
|| Alternatives analysis, public involvement.
|| Select preferred alternative(s); finalize pre-design and details of preferred alternative(s); community meeting to discuss preferred alternatives.
|| Selection of engineering design team.
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:
Storm Systems Hydrologist, Community Liaison