Habitat Mitigation & Restoration

Grette Associates is recognized as a regional leader in the design, permitting, and construction of high-value aquatic habitats in the Pacific Northwest.

For projects requiring habitat mitigation and restoration, we take pride in developing sites that provide self-sustaining and long-lasting ecological benefits to target species.  A few of our most successful initiatives in Washington include the first-of-its-kind large-scale establishment of new eelgrass habitat in Drayton Harbor and the construction of new off-channel freshwater and brackish wetland habitats amidst active port facilities in Commencement Bay, the Puyallup River, and the Duwamish Waterway.  These projects all occurred in areas where the amount of acreage available for restoration was limited, and showcase our ability to find creative solutions to complex and difficult situations.  Recently, Grette Associates successfully permitted the Port of Longview Berth 4 removal, which included capturing habitat credits in the form of discounted service acre years (DSAYs) to make them available as Section 404 mitigation credits for future Port projects. Our expertise in the planning, design, and permitting of habitat restoration and mitigation actions routinely includes elements related to:

  • Habitat Banking 
  • Salmon Recovery and Restoration
  • Eelgrass Restoration and Mitigation
  • Estuarine Marsh and Shoreline Restoration
  • Stream Restoration
  • Violation Resolution

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