Cascade Environmental Group
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    • John Runyon
    • Brent Haddaway, PWS
    • Tammy Stout
    • Sharon Cannizzo
    • Olivia Morgan
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Ghost Dike Advanced Wetland Mitigation Project
Pacific County, Washington

The Ghost Dike Advanced Wetland Mitigation Project was originally included as part of the Shoalwater Bay Mitigation Bank, but has been advanced as a separate project to establish a mitigation credit supply on a faster timeline than the bank project development.

The Ghost Dike Project generates wetland credits by removing a remnant dike segment that has breached in two locations, filling the borrow ditch that was excavated as a borrow source for dike construction, and re-creating a tidal channel network both behind the dike and outboard of the dike to the edge of the high marsh plant community. Cascade identified the site’s geographic limits, developed all project designs, developed the Advanced Wetland Mitigation Plan, and completed all federal, state, and local permitting for project construction. To guide the project design, Cascade identified appropriate reference sites and integrated the project into the larger estuarine design being developed for the Shoalwater Bay Mitigation Bank.
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Mitigation Plan development, and federal and state permitting were completed in 18 months, and the 21 acre site will ultimately  generate over 7 mitigation credits to support tribally sponsored projects with the Ghost Dike’s service area. Cascade has also guided the Tribe through Pacific County shoreline permitting process, and construction contractor selection. Cascade will provide guidance throughout project construction and apply salt marsh seed as each construction area is complete. We developed site-specific sediment control BMP’s to address the site’s tidal location, including maintaining a portion of the dike as surface water containment, and repurposing shrubs cleared from the dike as fascines to break wave energy before reaching the work area. The project also includes addressing European dunegrass and nonnative cattail populations within the bank and restoring high marsh vegetation to all disturbed areas. ​
 

Service Areas

Aquatic Resource Mitigation, Monitoring and Management
[email protected]
503-894-8585
2800 N Lombard St #803
Portland, OR 97217
Copyright 2014 Cascade Environmental Group, LLC
  • Home
  • Portfolio
    • Clackamas Partnership Strategic Planning and Grant Development Support
    • Carli Creek Water Quality Project
    • Ghost Dike Mitigation Project
    • Kwoneesum Dam Removal
    • Salmon Superhighway Strategic Action Plan
    • Molalla River Watershed Drinking Water Assessment
    • Chum Salmon Strategic Restoration Action Plan
    • Hopkins Forest Wetland Restoration
    • Yoncalla Creek Mitigation Bank
    • Cowlitz Tribe Estuary Restoration Feasibility Studies
    • Dahl Beach Mitigation Project
    • Wapato Valley Mitigation Conservation Bank Wetland Support
    • Shoalwater Bay Mitigation Bank
    • Newell Creek Canyon
    • Fernhill NTS Wetlands
    • Elk Creek Watershed Information Gap Assessment / Stream and Fish Surveys
    • Big Hanaford Creek
    • Chehalis Basin
    • Wallooskee-Youngs
    • Mitchell Creek
    • Pine Hollow-Jackknife Creek
    • Lamprey Migration Study
    • Rinearson Natural Area
    • Garret Creek
    • Wetland Delineations
  • Staff
    • John Runyon
    • Brent Haddaway, PWS
    • Tammy Stout
    • Sharon Cannizzo
    • Olivia Morgan
  • Contact
  • News
  • Who We Work With