Therriault Creek Stream and Wetland Restoration
River, Stream and Wetland Restoration
Client / Agency
Kootenai River Network, Inc.
Montana Fish, Wildilfe & Parks, US Fish & Wildlife Service, Geum Environmental Consulting, Inc.
Similar to many western valleys, Therriault Creek once supported a broad, wet meadow complex characterized by a diverse mosaic of wetland plants and woody riparian shrubs. Channelized in the mid 1900s for agricultural purposes, the system downcut resulting in the loss of 68 acres of wetland, severe streambed and bank erosion, loss of aquatic habitat complexity, and impaired water quality. In 2004, RDG designed and implemented a comprehensive restoration strategy consisting of two miles of channel reconstruction at the historical floodplain elevation, and conversion of the existing degraded channel to off-channel open water and emergent wetland complexes. Revegetation efforts are ongoing at the project and have included over 2,000 containerized plants, use of solarization techniques to reduce the cover of reed canarygrass, and noxious weed management.