Chatham Acres Restoration Project

Project Overview 

The Chatham Acres Restoration Project site is located on the North Fork Stillaguamish River between Oso and the town of Darrington, Washington. The site covers an area of approximately 27 acres on the south bank of the river, owned entirely by Snohomish County. A side channel flows through the site across the inside of the meander bend of the mainstem river channel.    

The proposed restoration project seeks to:

• Improve degraded salmon habitat conditions in the North Fork Stillaguamish River, and 
• Address the cumulative loss of habitat quality and quantity in the North Fork Stillaguamish River caused primarily by historical and recent human impacts. 

This will be accomplished by increasing pool frequency and edge habitat diversity and by increasing the amount of complex woody cover at low- and high-flows through the addition of wood and stable log jams. These restoration elements are designed to benefit North Fork Stillaguamish salmon adults and juveniles, and support recovery of the salmon populations.  

Restoration objectives include:

• Enhancement of approximately 1,640 feet of existing side channel with wood structures,
• Increased side channel connection, and 
• Improved quality and quantity of cold-water habitat important to salmon juveniles.