Our Work2017-05-05T05:20:02+00:00



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 [...]


New England Cranberry Bog Restoration

Tidmarsh Farms River & Wetland Restoration Holistic ecological restoration of cranberry bogs to native stream and wetland ecosystems was pioneered by Inter-Fluve through the Tidmarsh Farms project. Over 20,000 feet of stream channel and [...]


Urban & Planning

Our urban projects connect people to rivers – and restore ecological function to highly altered systems. Urban waterways are some of the most damaged in the United States, but increasingly, cities are transforming them from polluted eyesores [...]


Estuary Restoration

The Columbia River estuary is roughly 150 miles long, bordered by Washington to the north and Oregon to the south. This unique ecosystem contains diverse freshwater and saltwater wetlands, shaped over centuries by riverine and tidal forces. [...]


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 [...]


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. [...]


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 [...]


Howland Fish Bypass Channel

As the last of the four projects along Maine's Penobscot River, this 100 to 200 foot-wide bypass channel around the Howland Dam was constructed in 2015, improving access to nearly 1,000 miles of historic habitat for 11 [...]


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 [...]


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 [...]


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, [...]


Aerial Site Reconnaissance

We use aerial drones, also called unmanned aircraft system (UAS), to capture high-quality imagery and video that is used in a variety of applications to plan, design, survey and monitor restoration projects across the country. While the [...]


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 [...]


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 [...]


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. Fourmile Resilient Crossings Landowners Handbook [...]


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 [...]


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 [...]