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January 27, 2025

Heavy Industrial under $5 million

Photo courtesy of TRICO Companies
The Milltown Island restoration improves tidal exchange by removing sections of the existing levee and constructing additional tide channels.

Milltown Island Unit Restoration Project

South Fork Skagit River

TRICO Companies

Milltown Island was once entirely tidal marshland. Over decades, early homesteaders diked the island to create farmland. TRICO’s Milltown Island Unit Restoration Project for the Washington Department of Fish &Wildlife aimed to restore fish and wildlife habitat to the island. The project improves tidal exchange by removing sections of the existing levee and constructing additional tide channels.

TRICO was responsible for removal and placement of approximately 30,000 cy of levee and channel material, grading, embankment, and rough restoration. Nearly 2.5 acres of levee were removed across 22 locations. The excavated material was used to form wetland habitat mounds to be planted with native species, creating scrub-shrub, and forested tidal wetlands. 13 new channel networks were excavated totaling approximately 9,050 feet, creating blind tide channels and tidal headwaters. Four 30” culverts were removed and replaced with tide channels. These features will help to restore the island for species like salmon, beaver, birds, and wildlife.


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