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 130+ 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 velocity, in the right place, for the right fish.


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. Across the country, we’re reconnecting and restoring these habitats.


Wetlands & Peat Bogs

Holistic ecological restoration of cranberry bogs to native stream and wetland ecosystems was pioneered by Inter-Fluve. Today, we’re applying lessons learned to cranberry farms throughout New England.


Urban & Planning

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.


Topographical Survey, UAV & Hydraulic Modeling

Good data is the foundation of every project we design. Our engineers and scientists have a variety of tools to choose from depending on the client, complexity of the the project, and overall goals.


Tools for Visual Communication

Communication and stakeholder outreach can be the make-it or break-it stage of a project. We work with our clients to develop illustrative materials that encourage discussion without stifling it, educate our audience instead of alienating them with jargon, and inspire people to work together.


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.