Our Work

From stream and rivers to wetlands, lakes and estuaries: freshwater ecosystem restoration is what we do. Since 1984, we have completed over 2,000 projects across all regions of the United States and on four continents.


Dam Removal & Fish Passage

Fish passage barriers across the United States are being removed or modified to help fish and wildlife, improve safety and boost recreation. We’ve worked on 150+ dam removals, removed hundreds of culverts, and developed best practices resources for bridge crossings.


Large Wood Design

There are rivers that move wood, and wood that moves rivers. We do both. Placing large wood structures improves aquatic habitat conditions, can assist in providing reliable bank protection, and enhances the structural and hydraulic complexity of the channel.


Floodplain Reconnection

Floodplains provide habitat for fish and wildlife, storage for floodwaters, clean our waters, and provide space for rivers to move. We examine historical and contemporary river corridor to strategically reconnect floodplains.


Off-Channel Habitat

We design off-channel habitats that provide the right kind of habitat, at the right time, for the right fish and wildlife species.


Watershed Planning & Long-Term Implementation

To understand where a river is going, we need to know where it has been. Assessments are the foundation of a stream habitat restoration strategy and lead to projects in the ground.


Estuary Restoration

Estuaries are dynamic ecosystems where oceans, rivers and human economies converge; they’re also critical to rearing grounds for fish and wildlife and at particular risk to a changing climate. Across the country, we’re reconnecting and restoring these habitats.


Wetlands & Peat Bogs

From cranberry farms in New England, to golf courses in Illinois, and side channels in Washington's Methow Valley, Inter-Fluve is restoring ecological integrity and natural function to damaged wetland ecosystems around the country.



Beginning with the daylighting of Tanner Creek in Portland (1992), we’ve been collaborating with urban planners and landscape architects to restore urban streams from coast to coast in the US and abroad.


Technical Design Guidelines

In the early 1980s, there were no instruction manuals for the emerging river restoration industry. Today we regularly contribute to technical design guidelines to elevate industry best practices with various audiences and public engagement strategies.