Blue Heron Slough Conservation and Mitigation Bank

The proposed 353-acre Blue Heron Slough bank is located between the cities of Everett and Marysville, on north Spencer Island, east of U.S. Interstate 5, in Snohomish County. The Interagency Review Team is beginning the review process for this bank.


Project sponsor

Julie Mentzer
310 SW Fourth Ave., Suite 830
Portland, OR 97204
(503) 241-4895

Port of Everett
Erik Gerking
P.O. Box 538
Everett, WA 98206
(425) 259-3164


  • Joint Corps and Ecology public notice: April 9, 2020, with Prospectus.

Site location

  • Water Resources Inventory Area 7, Snohomish County
  • Located in unincorporated Snohomish County on north Spencer Island between Steamboat Slough and Union Slough, east of I-5
  • Site Map


  • Size: 353 acres.
  • Site actions: restore and reconnect tidal marsh habitat in the Snohomish Estuary and provide off-channel fish rearing and refuge habitat.