Woods Lake Creek Culvert Replacement

Project Title

Woods Lake Creek Culvert Replacement on Lake Chaplain Road


The existing drainage culvert is undersized and has experienced flooding from backwater multiple times in the past. The Chaplain Lake Road embankment around this culvert has been compromised and it now poses a high risk of failure within the next year. The drainage structure crosses a roadway that is critical to the delivery of personnel, equipment, parts and chemicals to the city’s water filtration plant. This plant is crucial to the region’s water supply system, which serves over 600,000 residents or about 80 percent of people in Snohomish County.

Project Description

The project is located at the Woods Lake Creek crossing of the Lake Chaplain Road northeast of Monroe, Snohomish County, Washington. The new culvert structure will accommodate larger flow events, improve fish passage across a larger range of flows and allow for more natural stream processes to occur.
  • The proposed pipe crossing will be a single radius open bottom structural plate arch culvert on precast concrete footings (80 feet long, 10 feet high and a 26-foot bottom width). 
  • This will involve a MSE headwall on the upstream  inlet and new rip rap on downstream outlet.
  • As part of the proposed culvert, approximately 150 feet of stream channel will be reconstructed and disturbed stream banks will be restored. 

Project Area

View the Project Area Vicinity Map (PDF
Temporary Passenger Vehicle Route Map (PDF)


Start constructionAugust 23, 2017 
Lake Chaplain road closureAugust 28, 2017
Approx. roadway re-openOctober 8, 2017
Complete constructionOctober 31, 2017 

Project Manager

Ed Fisher 425-257-8932 or email

Contact Us

  1. After Hours & 24-hour Emergency Number

    Phone: 425-257-8821 

    Email the Department
    Phone: 425-257-8800


    3200 Cedar Street
    Everett, WA 98201

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