Environmental Permitting Services

Site Selection Analysis and Due Diligence

Permitting Strategies, Applications and Technical Support

Agency Consultation and Coordination

Expert Testimony and Technical Support

Third-party Quality Assurance Audits

Environmental Regulatory Expertise

Bald and Golden Eagle Protection Act

CWA Sections 401, 402, 404 & 408

Comprehensive Environmental Response, Compensation, and Liability Act

Coastal Zone Management Act

Endangered Species Act

Fish & Wildlife Coordination Act

Magnuson-Stevens Fisheries Conservation and Management Act

Migratory Bird Treaty Act

National Historic Preservation Act

National Pollution Discharge Elimination System Permits and Waivers

Rivers and Harbors Act

Resource Conservation and Recovery Act

Wild and Scenic Rivers Act

State and Local Natural Resource Related Statutes

NEPA Process and Documentation

Environmental Impact Statements

Environmental Assessments

Environmental Impact Assessments

Mitigation Planning and Monitoring

Environmental Documentation

Third Party Technical Reviews

FERC Licensing and Compliance

Licensing and Compliance Environmental/Recreational Studies

Environmental Due Diligence for Facility Sale/Acquisition

Environmental Permit Compliance

Fisheries Mitigation

Construction and Post-construction Monitoring

Wetland Mitigation Monitoring

Erosion and Sedimentation Control

Avian/Bat Monitoring

Monitoring for Water Quantity/Quality Concerns

Monitoring of Habitat Identified as Critical Habitat for Wildlife Species or Plant Communities

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

Freshwater Mussel Survey and Mitigation Services

Freshwater Mussel Population Survey and Identification

Qualified Mussel Surveyors

Salvage, Relocation and Long-term Monitoring

Scientific Diving Management and Oversight

Navigable Waters Surveys

Marine and Freshwater Habitat Assessments

Essential Fish Habitat Biological Studies

Instream Flow Assessments

Aquatic Ecology Assessment

Submerged Aquatic Vegetation Surveys

Stream Redesign (Culvert, Open for Fish Passage)

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

Water Quality Assessments and Monitoring

Acoustic Hydrology using Acoustic Doppler Technology

Benthic Surveys of Organisms and Sediments

Water Quality Sampling and Monitoring

Groundwater Monitoring

Stormwater Sampling

Water Quality Assessment and Modeling

Water Supply Planning and Studies (Quantity and Availability)

Sediment/Dredge Materials Characterization


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

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

Ecological Land Services

Due Diligence (Consulting/Reviews, Environmental, Acquisitions)

Terrestrial Ecology Assessment & Management

Environmental Site Assessments

Site Screening & Critical Issues Identification

Site Selection

Phase I and Phase II Environmental Site Assessment Services

Land Rehabilitation and Restoration

Ecosystem Restoration

Environmental Mitigation

Habitat Restoration

Mitigation Design and Banking

Plant Community Surveys

Botanical Surveys

Plant Community Evaluation and Mapping

Rare Plant Species

Wetland Sciences

Wetland Delineation

Functions and Values Assessments

Remote and Onsite Wetland and Waterway Delineation

Qualified Vernal Pool Identification

Wetland Habitat Assessments

Wetland and Riparian Habitat Assessment and Mitigation

Watersheds and Riparian Zone Evaluation

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

Wildlife Survey and Inventory

Habitat Conservation Plans

Avian Studies and Protection Plans

Avian Powerline Interactions

Bald and Golden Eagle Management Plans

Bat Studies and Protection Plans

Bat Hibernacula Protection

Biological Population Surveys and Modeling

Breeding Bird Surveys

Management Plans (e.g., endangered species, deer, bear)

Wildlife Safe Harbor Plans

Wildlife Distribution and Habitat Analysis

Habitat Evaluation Procedure Analysis

Habitat Assessment, Restoration and Preservation

Protected Species and Critical Habitat Identification

Protection, Mitigation, and Enhancement Effectiveness Evaluations

Wildlife and Protected Species Studies (Field, Radar, Aerial, Acoustic, Ultrasound, Thermographic)

Wildlife Habitat Identification and Assessment

Wildlife Management and Protection

Wildlife Disturbance and Impact Studies

Human-Wildlife Issues (Coexisting with Wildlife)

Risk Assessment

To see a complete list of our Wildlife Sciences services, click here.

Database Design and Management

Complex Database Design, Data Management, and Statistical Analyses

Remote Sensing and Monitoring


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

High Resolution Bathymetry

Acoustic Doppler Current Profiling


Data Visualization

ReMOTe (Remote Marine And Onshore Technology)

IFIM (Instream Flow Incremental Methodology)

SEFA (System for Environmental Flow Analysis)

Database Design and Management

GIS and Mapping

Database QA/QC

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


Over 45 years’ experience providing environmental and permitting services for transportation, recreation, and development projects, from desktop and field studies to complex NEPA assessments and post-construction monitoring.

Senior regulatory specialists include a former EPA Region Administrator and two former US Army Corps of Engineers District Commanders, experienced in successfully navigating complex state and federal permit processes.

Extensive experience with remote sensing using high-resolution aerial photography and photointerpretation essential for projects in remote areas or with limited access.

Hundreds of projects conducting field wetland delineation and functional assessments, mitigation planning and design, stream and wetland restoration design, permitting, construction oversight, post-construction monitoring, and third party reviews.

Specialized scientists, like our malancologists, who are fully permitted and Qualified Surveyors familiar with over 67 mussel species in 12 state or federal listed and multiple special concern mussel species.

Conduct site-feasibility surveys to support project siting including critical issues or “fatal flaws” analysis.  

Recognized by National Marine Fisheries Service for the outstanding quality of Essential Fish Habitat (EFH) impact assessments and Biological Assessments, including expertise in assessments for Sturgeon.


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

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

Survey and mapping specialists with thousands of miles of linear project experience including transmission lines, pipelines, roads and bridges.

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