OUR WORK

River Island Channel & Floodplain Restoration

Metro, a regional government body, contracted Inter-Fluve to restore an abandoned gravel mine on the Clackamas River. In 1996 a 100-year rain-on-snow flood event caused the mainstem Clackamas River to breach a levee and flow through this active [...]

Dam Removals

Across the country, aging dams are posing health and safety risks to residents living downstream. They also impede migratory patterns of fish and wildlife, especially on our east and west coasts where migratory fish like salmon journey up [...]

New England Cranberry Farm Restoration

Cranberry bogs constructed in the early 20th century are still in production throughout Massachusetts, the #2 cranberry producer in the nation. However, one of the key challenges with traditional cranberry farming techniques is the capture and re-routing of [...]

Middle Fork John Day Oxbow

The Oxbow project on the Middle Fork John Day River was designed to enhance salmon habitat on a reach of the river whose floodplain was subjected to hydraulic dredge mining for gold in the 1930s and 1940s. The [...]

Minnehaha Creek Natural Channel Restoration

Minnehaha Creek flows east into the City of Minneapolis where it meets the Mississippi River. Initially, we performed a reach assessment of the entire 21 miles of the creek (2003) that included a qualitative geomorphic evaluation of relative [...]

Howland Fish Bypass Channel

As the last of the four key pieces of the Penobscot River restoration effort to be implemented, this project involved the construction of a major bypass channel around the Howland Dam (pictured below). The project significantly improves access [...]

Fender Mill Alcove

Yakama Nation Fisheries Upper Columbia Habitat Restoration Project contracted Inter-Fluve to perform a reach assessment, and design of a 2,200-foot-long groundwater-fed side channel to provide year-round rearing habitat for summer chinook and steelhead. The side channel intercepts groundwater, [...]

Clackamas River Basin

In 1877, Livingston Stone, employed by the U.S. Fish Commission to explore potential hatchery sites throughout the Columbia River Basin, professed that “probably no tributary of the Columbia has abounded so profusely with salmon in past years as this river [...]

Reach Assessments

Inter-Fluve has completed over 90 reach assessments across the US, covering well over 2,000 miles of river. The projects have ranged from the 20-mile assessment we completed on the Upper Methow River in the North Cascades of Washington, to [...]

Picha Creek Channel Rehabilitation

While walking 125 miles of the Sand Creek and Credit River (MN) during a watershed-level assessment, we identified over 200 restoration projects and ranked them on a 1-11 scale. Picha Creek ranked at the top for restoration potential. [...]

Tipiliuke Spring Creek & Lake Enhancement

Tipiliuke is a world-class fly-fishing resort on a 20,000-hectare estancia at the foot of the Andes in the Patagonia region of Argentina. To increase the number of fish in the nearby Rio Chimehuin and improve angling conditions on [...]

Technical Design Guidelines

Inter-Fluve is regularly called upon to contribute to technical design guidelines to elevate industry best practices with various audiences and public engagement strategies. Below are brief descriptions of select projects. Dry Creek Handbook for landowners Our in-house team [...]

La Center Wetlands

Inter-Fluve supported the Lower Columbia Estuary Partnership in identifying restoration opportunities, designing and constructing this large-scale floodplain reconnection project. Project design elements included breaching existing levees to reconnect surface water from the East Fork Lewis River to adjacent floodplains to [...]

Horsetail Creek Floodplain Restoration

Located on the Columbia River floodplain, the 180-acre Horsetail Creek project area was dramatically impacted by construction of Interstate 1-84 and resulting diversions of the creek, as well as a pea gravel mine. Despite this legacy of disturbance, [...]