Ecosystem Restoration Design

We approach habitat restoration with a long term view of restoring the natural processes that support ecosystems and adapt to changing conditions. This involves an understanding of physical processes such as sediment dynamics and hydrology which support diverse native vegetative and macro-invertebrate communities. These provide the basis to support target species such salmonids, birds, and other wildlife. Our plans and designs integrate with the broader landscape understanding that ecosystems do not exist in isolation but rely on adjacent uplands as well as upstream and downstream influences.

Ecosystem Restoration - large wood designWith almost two decades of experience in large wood design we understand the diverse applications of using wood in habitat restoration. Large wood elements provide micro habitats such as localized scour pools as well as large scale structural components that direct flood flows or encourage aggradation to build islands. Our designs provide reliable anchoring without cables using posts and rock. We are recognized for designs that blend seamlessly into a natural environment so that the finished stream doesn’t appear to be restored by people but by nature.

Ecosystem Restoration - Marjorie's MixThe success of these features largely depends on local hydraulics at inlets and outlets that control the flow of water and sediment through the system. We have worked with innovative structural features such as sand traps and orifice inlets as well as using local hydraulic structures built of log and rock. While at the Department of Fisheries and Oceans Marjorie developed a spawning mix that has been used successfully ever since and been named Marjorie’s mix.
Ecosystem Restoration - Wetland RestorationOur wetland restoration projects include hundreds of acres of restored and enhanced wetlands. These support a wide variety of native species within an adaptive ecosystem such as beaver, fish, amphibians, and birds. Our wetland projects have been successful from ski hills to estuaries by building on the natural features and vegetation of each unique site.

Ecosystem Restoration - 7 mile roughened channel fish passageWe combine engineering design skills with in-depth hydraulic modeling to develop successful fish passage projects. Our experience includes hydraulic and natural channel designs as well as roughened channels. We have worked on fish passage projects in multiple states understanding local regulations and expectations which often concerns critter passage as well as fish.

Water resources management includes infrastructure placement, operation, and occasionally removal that impacts ecosystems. For instance our work for the Stimson dam removal on the Blackfoot river involved analysis and planning to protect mill infrastructure and water supplies with the removal of the dam. We have designed a wide variety of fish screens including turbulent fountains, rotating drums, coanda and flat plate screens. We have designed and built fish barriers when necessary to protect a genetically sensitive species or water supply intakes. These are often waterfall features that incorporate fish barriers in an overall naturally aesthetic feature.