Environmental Permitting Services

Site Selection Analysis and Due Diligence

Critical Constraints Analysis and Issues Identification

Avoidance, Minimization, Mitigation Strategies

Permit, Application Development and Technical Support

Agency Consultation and Coordination

Expert Testimony and Technical Support

Environmental Regulatory Expertise

Bald And Golden Eagle Protection Act

Clean Water Act Sections 401, 402, 404 & 408

Coastal Zone Management Act

Endangered Species Act

Federal Power Act

Fish & Wildlife Coordination Act

Magnuson-Stevens Fisheries Conservation and Management Act

National Historic Preservation Act

National Pollution Discharge Elimination System Permits

Rivers and Harbors Act

Wild and Scenic Rivers Act

State and Local Natural Resource Related Regulations

NEPA Process and Documentation

Categorical Exclusion Documentation

Environmental Assessments/Finding of No Significant Impact

Environmental Impact Assessments

Agency Consultation and Public Outreach

Mitigation Planning and Monitoring

Environmental Documentation

Third Party Technical Reviews

FERC Licensing and Compliance

FERC Licensing Strategy and Process Management

FERC Resource Report Development

Development of Comprehensive Plans

Rare, Threatened and Endangered Species Study Plans and Biological Assessments

Critical Review Of Comprehensive Plans, Biological Opinions, Study Reports

FERC License Compliance Management

Environmental Permit Compliance Tracking

Document Preparation and Management

Settlement Negotiation

Expert Witness Testimony

Construction Compliance with Permit Conditions

Support for Recreational/Historic and Archeological Studies

Environmental Due Diligence for Facility Sale/Acquisition

Environmental Permit Compliance

Fisheries Mitigation

Construction and Post-Construction Monitoring

Wetland Mitigation Monitoring

Erosion and Sedimentation Monitoring

Fish Identification, Stomach and Tissue Sampling and Analysis

Quality Assurance Programs

Monitoring For Water Quantity/Quality Concerns

Turbine/Spillway Passage Survival, Injury, and Entrainment

Turbine Operational Modifications

Fish Passage Evaluations

Monitoring Designated Critical Habitat Wildlife Species Or Plant Communities

Fish and Amphibian Salvage and Relocation

Fish Distribution and Abundance Evaluations

Freshwater Mussel Monitoring

Mark-Recapture and Survivorship Studies

Mitigation Planning and Monitoring

To see a complete list of our Environmental Permitting & Regulatory Compliance services, click here.

Freshwater and Marine Fisheries Surveys

Fish Collection and Characterization

Fisheries Acoustic Studies

Migratory Fish Biology, Behavior, and Restoration

Fish Population Studies and Modeling

Fish Passage Facility Operation Services


Population Modeling

Fish Salvage and Relocation Efforts

Fish Scale Age and Growth Analysis


Freshwater Mussel Survey and Mitigation Services

Freshwater Mussel Population Survey and Species Identification

USFWS Qualified Mussel Surveyors

Survey Plan Negotiation and Development

State Approved Mussel Surveyors

Biological Assessments

Salvage, Relocation and Long-Term Monitoring

Scientific Diving Management and Oversight

Navigable Waters Surveys

CWA 316(b) Freshwater Mussel Studies

Section 7 Consultations

Pipeline, Bridge, and Railroad Crossings

Construction Monitoring

Water Withdrawal

Outfall Evaluations

Expert Testimony

Marine and Freshwater Habitat Assessments

Essential Fish Habitat Biological Studies

Instream Flow (IFIM) Assessments

Aquatic Ecology Assessment

High Resolution Bathymetry

Submerged Aquatic Vegetation Surveys

Habitat Suitability Index Modeling

Scientific Diving

Habitat Mapping, Modeling and Hydrologic Alteration Studies

Coastal, Estuarine and Marine Ecosystem Surveys

Coastal and Marine Habitat Restoration Planning and Design

Reservoir Fluctuation and Shoreline Assessments

Stream Rapid Bioassessments

Hydro Industry-Certified Snorkel Teams

Water Quality Assessments and Monitoring

Acoustic Hydrology using Acoustic Doppler Technology

Benthic Surveys

Water Quality Sampling and Monitoring

Water Quality Assessment and Modeling

Water Quality Assessment and Modeling

Water Supply Planning and Studies (Quantity and Availability)

Sediment/Dredge Materials Characterization

Vibracor Sampling

Contaminated Sediment Assessments

Dredge Plume Monitoring

Erosion and Sediment Transport Evaluations

Sediment Profile Camera Benthic Surveys

Sediment Sampling, Testing, and Analysis

Dredging and Disposal Analysis and Permitting

Scientific Diving Program

SCUBA Certified Divers

Advanced Diver, Rescue Diver, and Certified Dive Masters

U.S. Coast Guard Licensed Boat Captains

Transportation Worker Identification Credential Security Clearance

Conformance with OSHA 29 CFR 1910.401 Subpart T

Biological Lab Services

Entrainment Sample Identification

Fish Identification, Stomach and Tissue Sampling and Analysis

Credentialed Taxonomists

Freshwater, Estuarine, and Marine Benthic Macroinvertebrates, Algae, and Periphyton, Identification and Analysis

Ichthyoplankton, Zooplankton, and Phytoplankton Identification

Benthic Invertebrates, Algae, and Periphyton Identification

Laboratory Processing, Data Capture and Analysis, Project Reporting and Mapping

Long Term Environmental Monitoring Database Management

Quality Assurance Program

To see a complete list of our Marine & Freshwater Sciences services, click here.

Plant Community Surveys

Botanical and Aquatic Plant Surveys

Plant Community Evaluation and Mapping

Rare, Threatened and Endangered Species

Wetlands Resource Services

Wetland Delineation

Functions and Values Assessments

Stream and Riparian Habitat Assessment and Mitigation

Aerial Photointerpretation and Mapping

Vernal Pool Identification and Documentation

Rapid Bioassessments

Wetland Impact Assessment

Impact Mitigation

Stream and Riparian Habitat Assessment and Mitigation

Compensatory Mitigation and Habitat Restoration

Watershed Evaluation

To see a complete list of our Wetlands & Landscape Ecological services, click here.

Remote Sensing and Monitoring

Acoustic Tools – ARIS/DIDSON, Bathymetric Surveys, Mobile & Fixed Hydroacoustic Monitoring

High Resolution Bathymetry

Hydroacoustic Remote Sensing

Side Scan Sonar Surveys

Acoustic Doppler Current Profiling


Instream Flow Analysis

Instream Flow Incremental Methodology

System For Environmental Flow Analysis


1-Dimensional Hydraulic Modeling (PHABSIM)

2-Dimensional Hydraulic Modeling (River2D)

Development of Habitat Suitability Criteria

Fish Passage Assessment

Database Design and Management

Complex database design, data management, and statistical analyses

Database QA/QC

To see a complete list of our Remote Sensing & Data Visualization services, click here.


Over 50 years of FERC licensing and relicensing projects, achieving and maintaining regulatory compliance, and optimizing facility performance.

More than 200 hydropower project sites nationwide, including conventional, pumped storage, and hydrokinetic facilities, on large and small river systems, in urban and remote locations.

Our patented Hi-Z Turb’N Tag® fish recapture technology has revolutionized fish injury and survival in passage through turbines and spillways.

Fish passage and biotelemetry assessments of American Shad, river herring, Sturgeon, Salmon, and American Eel throughout the US including nine major river systems just on the east coast.

Fish passage and biotelemetry assessments of American Shad, river herring, Sturgeon, Salmon, and American Eel throughout the US including nine major river systems just on the east coast.


Our highly qualified scientists have worked together for longer than 25 years, providing high-caliber technical capabilities.

Highly qualified personnel and a full suite of field sampling equipment, including vessels, vibracores, gravity cores and grab samplers; Acoustic Doppler Current Profilers (ADCP); global positioning system (GPS) technology and GIS services; and biological sample analysis.

Sediment survey equipment for analytical testing, pre- and post-dredge surveys, beneficial use studies, including barge-mounted and portable vibracores, Peterson and Ponar® grabs, gravity corers, hand corers and augers.  Capable of sampling in deep or shallow water, lakes, rivers, or bays, lagoons/impoundments, wetlands, and tidal flats.

Capacity to quickly mobilize and deploy multiple field crews to fit the needs of the project.

Extensive in-house staff expertise with rare, threatened and endangered species including freshwater mussels, bats, wildlife, fish, plants and other species.

The largest specialized laboratory facilities for processing freshwater and marine samples.

Expert witnesses and peer reviewers for developers, construction and contracting firms, and transportation agencies.