Celebrating 40 Years
at the Place Where
Rivers Connect
Credit for video clip of kingfisher: MIT Media Lab’s Responsive Environments Group, in collaboration with Living Observatory, at Mass Audubon’s Tidmarsh Wildlife Sanctuary. Used by permission.
Our Work
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.
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.
Inter-Fluve has completed over 2,600 projects. Here’s where we’ve been working.
Vinegar to Vincent Habitat Restoration
Kachess River Restoration Project
Congratulations to our friends at @theharwichconservationtrust and their partners on their big win at the ACEC/ MA 2025 Engineering Excellence and Awards Gala!
Cold Brook Preserve lies in an area where decentralized septic systems have contributed to nitrogen pollution. Rather than build costly treatment infrastructure, the Town of Harwich and Harwich Conservation Trust (HCT) partnered with the Massachusetts Division of Ecological Restoration (DER) to pursue a nature-based solution: process-based ecological restoration of 66 acres of retired cranberry bogs.
Inter-Fluve led data collection, hydraulic modeling, design, permitting, and construction oversight for the transformation of the site into self-sustaining wetland and stream habitat. The design reestablishes natural hydrology, improves water quality through nitrogen attenuation, and supports fish passage for alewife, blueback herring, and American eel. Habitat complexity was restored using large wood, earthwork, and native plantings, benefiting Species of Conservation Concern. The restoration was designed to be resilient to sea-level rise and climate change, and features new trails and stream crossings for public access. Cold Brook is now a regional model for low-impact wastewater management and ecological restoration. #engineering #capecod #harwich #harwichma #riverrestoration #wetlands
2024 was a record-tying year for dam removals, with 108 dams removed and 2,528+ miles of river reconnected across the U.S. We`re thrilled to celebrate this momentum with @americanrivers and highlight our work on the Washburn Dam removal in New Hampshire.
Removing outdated dams restores fish passage, improves water quality, and enhances public safety. Thanks to this project, the river is flowing freely again, benefiting wildlife and local communities.
🔗See full impact at link in @americanrivers bio!
Our very own Mark Pranckus will be presenting at the Upper Midwest Stream Restoration Symposium in Dubuque, Iowa, on Tuesday, February 25.
Mark’s presentation, titled “Looking Downstream to Avoid Stumbling Upstream – How Past Projects Can Be Used to Prepare for Future Stream Restoration Challenges,” explores the importance of learning from past projects to tackle future challenges more effectively. In a field where it’s easy to “complete and move on,” Mark is pushing us to reflect and build on what we’ve learned for smarter, more sustainable solutions.
If you’re attending the symposium, don’t miss this insightful session! Let’s keep the conversation flowing and work together to make a lasting impact on our waterways.
#StreamRestoration #Sustainability #InterFluve #UMWSRS #LearnFromThePast
The new boardwalk at Mirror Pond in Bend, OR, now provides full ADA accessibility along a previously challenging section of trail. Inter-Fluve completed hydraulic modeling to predict sediment depositional and scour patterns, inform planting plans of native riparian and aquatic plants, and support design of habitat for native fish species. Congrats to @HDR and all involved for making this happen, and to Engineers and Geoscientists British Columbia for the nice write-up. #SustainableDesign #AccessibilityForAll #TrailImprovements