Inter-Fluve, Inc.

What Inter-Fluve, Inc. does

Inter-Fluve, Inc. is an employee-owned environmental engineering consulting firm founded in 1984 by four fly-fishing scientists who combined expertise in geomorphology, fish biology, and hydrology to restore abused trout streams. Headquartered in Hood River, Oregon, with offices in Cambridge, Massachusetts and Damariscotta, Maine, plus an affiliated entity (Inter-Fluve Engineering, PLLC) serving Michigan, New York, and North Carolina, the firm has completed over 2,600 projects including 150+ dam removals across the United States and Canada. Core technical capabilities span geomorphic and watershed investigations, river and stream channel design, dam removal and fish passage engineering, estuary restoration, urban stream daylighting, bank stabilization and bioengineering, sediment management, and construction oversight. The firm also contributes to industry standards (e.g., Washington's Stream Habitat Restoration Guidelines) and operates the Headwaters Program, allocating 7% of annual profit to aquatic restoration education and internships.

The firm generates revenue through professional services engagements sold primarily via direct sales and government RFPs on multi-year, project-based contracts. Client base is diversified across federal agencies (Bureau of Reclamation, NOAA, USACE, USFWS), regional and municipal watershed and sewerage districts (Metro Portland, MMSD, Minnehaha Creek Watershed District), tribal nations (Yakama Nation since 2001), non-profits (American Rivers, Atlantic Salmon Federation), utilities (Portland General Electric, Sonoma Water), and private landowners, with contract values ranging from individual restoration designs to a role on the $1 billion Don River revitalization in Toronto alongside Michael Van Valkenburgh Associates. Proprietary technical methodologies, particularly groundwater-fed side channel design for salmonid thermal refuge and dam removal sediment management, function as the firm's key differentiators. Pricing is quote-based and not publicly disclosed.

Notable recent awards include the 2025 ACEC Massachusetts Grand Conceptor Award (Cold Brook), 2025 Quebec Association of Engineering Consulting Firms Grand Prix in Environmental Category (St. Croix River Milltown Dam Removal), and 2024 ACEC Oregon Grand Award (Middle Fork John Day), signaling continued recognition across geographies. Marketing is largely earned-media driven through industry awards, conference participation, and a modest Instagram and website presence rather than paid digital channels.

Name

Inter-Fluve, Inc.

Legal name

Inter-Fluve, Inc.

Website

https://interfluve.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

51–100 employees

Short description

Inter-Fluve is an employee-owned environmental engineering consultancy specializing in river, lake, wetland, and estuary restoration, serving federal, state, and local government agencies, tribal nations, non-profits, and private clients across the U.S. and Canada.

Ownership category

akta.pro rank

Product category

Environmental Engineering & Water Resources Consulting

NAICS

Environmental Consulting Services (54162), Architectural, Engineering, and Related Services (5413)

SIC

Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

akta.pro secondary industry

Site Assessment & Remediation (Phase I/II, Cleanup Oversight) (BPAHAJAC)

Keywords

• River restoration engineering
• Aquatic habitat restoration
• Dam removal consulting
• Wetland restoration services
• Water resources engineering

Headquarters

HQ city

Hood River

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Engineering Consulting Services: Professional consulting services for river, lake, wetland, and estuary restoration including investigations, design, construction oversight, permitting, and monitoring. Revenue generated through billable hours on project-based contracts with government agencies, tribes, businesses, and non-profits.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Inter-Fluve provides professional engineering and consulting services for the investigation, design, and restoration of rivers, lakes, wetlands, and estuaries. Service offerings span geomorphic and watershed investigations, river and stream channel design, dam removal and fish passage engineering, estuary restoration, urban stream daylighting, bank stabilization and bioengineering, and construction oversight, permitting, and monitoring. The firm delivers these services under project-based contracts to federal, state, and local government agencies, tribal governments, non-profits, and select private businesses.

Product overview

Inter-Fluve, Inc. is an employee-owned engineering and consulting firm that offers a comprehensive suite of river restoration and water resources services. The firm provides integrated scientific and engineering solutions organized around investigations, design, and construction/monitoring phases. Core service offerings include dam removal and fish passage, estuary restoration, urban stream restoration, geomorphic investigations, river channel design, bank stabilization, and technical advisory services. The firm also contributes to industry standards through technical design guideline development and operates the Headwaters Program for community giving, education outreach, and student internships. Inter-Fluve has completed over 2,600 projects across the United States and internationally, working with governments, businesses, tribes, and non-profits.

Differentiator

Problem solved

Functional benefit

Products and services

• Dam Removal & Fish Passage Services

Quantifiable outcome

• Over 2,600 projects completed since 1984
• +6 more outcomes

Named customers14 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

18 partnerships are on record, tiered core and flagship.

• Atlantic Salmon FederationcoreStrategic or Co-development Partner · 1 January 2015Partner since 2015 for Sheepscot River restoration including Coopers Mills dam removal (2018), Head Tide dam partial removal with fish passage (2019), and technical fish passage at Branch Pond.
• Boardman River Implementation TeamcoreStrategic or Co-development Partner · 1 January 2011Collaboration of State, Federal agencies, Indian Tribes, local governments, non-profits and energy provider for largest river restoration in Michigan history - removing Sabin, Boardman and Brown Bridge dams reconnecting 160 miles of free-flowing coldwater stream.
• Sonoma Water (Sonoma County Water Agency)coreStrategic or Co-development Partner · 1 January 2008Partnership since 2008 for Dry Creek Habitat Enhancement Project to improve conditions for endangered Coho Salmon and threatened steelhead trout. To date three miles of Dry Creek restored with another three miles in design under Army Corps General Investigation Study.
• Minnehaha Creek Watershed DistrictcoreStrategic or Co-development Partner · 1 January 2003Long-term partnership since 2003 for creek restoration, bank stabilization, habitat enhancement, and regional trail master planning. Includes multiple geomorphic assessments and completed projects.
• Yakama NationcoreStrategic or Co-development PartnerLong-term partnership since 2001 for habitat restoration in Columbia River watershed (Methow, Entiat, Wenatchee, Yakima, and Klickitat rivers). Projects include dam removals, culvert replacements, side channel creation, levee removal, large wood structures, and salmonid habitat enhancement across 147+ miles of stream.
• Portland General Electric (PGE)coreStrategic or Co-development PartnerPartnership for fish enhancement projects on the Clackamas River including the Milo McIver Fish Enhancement Project, designing groundwater-fed channels for salmonid habitat and cold-water rearing refuge.
• Metro (Portland Regional Government)coreStrategic or Co-development PartnerContracted by Metro to restore abandoned gravel mine on the Clackamas River. Project included rebuilding riparian-forested wetlands and reconnecting Goose Creek tributary to mainstem, completed in two phases totaling over $4 million.
• Michael Van Valkenburgh Associates (MVVA)flagshipStrategic or Co-development PartnerPrime contractor for the $1 billion Don River revitalization project in Toronto, Canada. Inter-Fluve leads channel and wetland designs, plant species assemblages, and habitat features. Project described by Bloomberg as one of the most ambitious urban resilience projects in the world.
• Waterfront TorontoflagshipStrategic or Co-development PartnerContracted by Waterfront Toronto and MVVA for the $1 billion Don River revitalization project - a 308-acre Lower Don Lands restoration transforming industrial areas into natural river corridors and mixed-use neighborhoods.
• Milwaukee Metropolitan Sewerage District (MMSD)coreStrategic or Co-development PartnerPartnership for Underwood Creek Flood Control & Habitat Restoration ($11.6M project) in collaboration with US Army Corps of Engineers. Replaced concrete flood channel with natural stream restoration mimicking high-gradient mountain stream.
• Bureau of ReclamationcoreChannel Partner/ Reseller/ DistributorMaintains federal contract for water resources engineering services. Projects include Middle Fork John Day River restoration with US Bureau of Reclamation design team.
• NOAA FisheriescoreChannel Partner/ Reseller/ DistributorFederal partner for fish habitat restoration projects including Patapsco River dam removals and salmon recovery programs.
• U.S. Army Corps of EngineerscoreChannel Partner/ Reseller/ DistributorFederal contracting partner for flood management and restoration projects including Underwood Creek collaboration and Boardman River dam removals in Michigan.
• U.S. Fish and Wildlife ServicecoreChannel Partner/ Reseller/ DistributorFederal partner for aquatic habitat restoration and endangered species habitat projects.
• American RiverscoreStrategic or Co-development PartnerPartner for dam removal projects including Bloede Dam and Simkins Dam on Patapsco River. Inter-Fluve served as prime consultant for design and construction phase services for these $17.9M projects.
• Lower Columbia Estuary PartnershipcoreStrategic or Co-development PartnerPartnership for identifying restoration opportunities and designing La Center Wetlands floodplain reconnection project reconnecting 453 acres to East Fork Lewis River for salmonid habitat.
• Maryland Department of Natural ResourcescoreChannel Partner/ Reseller/ DistributorDam owner for Patapsco River dam removals. Bloede Dam Removal project opened 65+ miles of spawning habitat supporting local recreational fishery.
• Town of FalmouthcoreChannel Partner/ Reseller/ DistributorRetained by Town of Falmouth for Coonamessett River Fish Passage & Habitat Improvements including dam removals, culvert replacement, and cranberry bog restoration totaling approximately 30 acres.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Biohabitats: Ecological restoration firm specializing in river, wetland, and coastal restoration with a similar interdisciplinary science-and-engineering model and comparable project scale. Direct competitor for many of the same government RFPs that Inter-Fluve pursues.
• Stillwater Sciences: Specialist river and watershed restoration science and engineering firm working with federal and state agencies on dam removal, fish passage, and habitat restoration projects. Closely comparable in mission, technical focus, and project types to Inter-Fluve.
• Kleinschmidt Group: Specialized water resources and environmental engineering consulting firm with strong expertise in FERC relicensing, fish passage, and hydro-related ecological work. Comparable niche focus and federal agency client base.
• Natural Systems Design: Mid-sized river and stream restoration engineering firm with similar technical offerings in dam removal, fish passage, and habitat design. Direct head-to-head competitor on Pacific Northwest restoration RFPs.
• Anchor QEA: Environmental and water resources engineering consulting firm providing shoreline, sediment, and aquatic restoration services to federal, tribal, and municipal clients. Similar mix of dam removal, sediment management, and habitat restoration work.
• River Design Group: Specialized river restoration engineering consultancy focused on hydraulic modeling, geomorphic design, and stream restoration. Closely comparable in technical service mix and target market.
• Michael Van Valkenburgh Associates (MVVA): Landscape architecture firm collaborating closely with Inter-Fluve as prime partner on the $1 billion Don River revitalization project. Comparable in delivering integrated design for major urban river and waterfront projects, though MVVA leads the landscape/urban design side.

Broad incumbents

• Tetra Tech: Global engineering and environmental consulting firm with a large water resources and ecological restoration practice. Competes with Inter-Fluve on larger federal contracts and offers overlapping services but as part of a much broader portfolio.
• Stantec: Major international engineering consultancy with a sizable environmental services and water practice. Competes for similar federal and municipal restoration RFPs but operates at significantly larger scale and broader scope.
• AECOM: Global infrastructure consulting firm with a substantial environment and water business. Pursues many of the same large-scale federal restoration and resilience contracts that Inter-Fluve supports as a subconsultant or specialty partner.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/interfluve
• Facebookfacebook.com/inter-fluve-inc-225154070596
• Instagraminstagram.com/interfluve
• LinkedInlinkedin.com/company/inter-fluve-inc.

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Inter-Fluve, Inc.