Smith Island Estuary Restoration Project Wins APWA Project of the Year
May, 2020
Otak is pleased to announce the Smith Island Estuary Restoration Project won both the American Public Works Association (APWA) National and Washington State Chapter, 2020 Project of the Year Award in the category of Environment: $25 million to $75 million. Entered projects are judged on construction management, environmental protection, safety performance, and community relations.
Otak’s Redmond and Everett team provided support to the Snohomish County Public Works Department who managed construction for the project that reestablished tidal marsh conditions to more than 330 acres of the Snohomish River estuary. Work was completed in November 2018.
The project included breaching 4,510 feet of dike to restore tidal flow to the estuary, reconnecting 18,480 feet of tidal channels, and creating 10,994 feet of new channel habitat, and a 1.2-mile new setback dike to protect public and private infrastructure including agriculture and highway. Funding came, in part, through $20.8 million in state and federal grants. 
Over the last century, the Snohomish River Estuary had become disconnected from tidal influence due to the installation of 40 dikes, years of deforestation, and urbanization. This altered the functioning of the landscape and caused a tremendous loss of juvenile salmon production. In 1999, Puget Sound Chinook was listed as an endangered species, sparking Snohomish County to acquire 415 acres on Smith Island for habitat restoration. Those efforts took five years. Over the next eight years, the design, permitting, and securing of funds commenced allowing construction to begin in 2015.
The work was done in two phases to accommodate two years of consolidation settlement and subsequent placement of drain pipes in the levee, and to account for tidal fluctuations, weather delays, winter construction suspensions, and work-date restrictions to protect aquatic life.
In Phase 1, Scarsella Brothers constructed the infrastructure to protect surrounding public and private development and initiated restoration of the marsh. For Phase 2, Orion Marine Contractors connected 3.5 miles of tidal channels and installed 42 engineered wood structures to facilitate channel formation and provide cover for juvenile salmon. 
Otak is proud to have been involved in the Smith Island Estuary Restoration Project. The benefits from this restoration effort will help bring back several endangered species of salmon contributing more than 30 percent of the Snohomish estuary acreage restoration target that was established in the federally-adopted Chinook salmon recovery plan for the Snohomish Basin. Smith Island now can support up to 250,000 juvenile salmon each year and provides public access to water recreation, walking trails, and wildlife viewing areas, as well as enhanced aquatic habitat and water quality. In addition, Smith Island is an important stopover on the regional flight corridor for migratory birds flying between Alaska, Mexico, and South America.