DTA offers environmental expertise in a wide range of disciplines to meet all permitting and environmental assessment needs for hydroelectric and water resources projects. Our environmental team includes individuals who are recognized leaders in their fields, both in environmental studies and in the development and application of innovative technology that assures cost-effective, scientifically sound results. Our environmental specialties include:

Aquatics & Fisheries

Habitat characterization and quantification, population assessment entrainment and mortality studies, fish passage studies, habitat enhancement design, telemetry and analysis of ecological interactions. Read more...

Terrestrial & Wildlife

Cover-type mapping, wildlife habitat mapping and studies, avian and mammal surveys, botanical resource inventories, radar-tracking of migratory birds, lakeshore and stream bank stabilization. Read more...

Water Quality

Water Quality sampling and monitoring, watershed analysis and development of watershed-based enhancements, federal Section 401 Water Quality Certification. Read more...

Instream Flow

Time series modeling, analysis of ramping effects on fish habitat, habitat mapping and statistical analysis, acoustic Doppler current profiles, application of the Delphi method in stakeholder negotiations, development of mitigation plans, agency consultation, and resource management negotiation. Read more...

Rare, Threatened, & Endangered Species Studies

Identification of wildlife and botanical RTE species and associated habitat, assessment of effects of impoundment fluctuations, aerial photo interpretation, federal Sections 7 and 10 consultation, preparation of habitat conservation and mitigation plans and implementation of mitigation techniques. Read more...

Wetland Assessment & Mitigation

Wetland classification and Sections 10 and 404 Corps of Engineers permitting, field delineation and mapping of jurisdictional boundaries, assessment of wetland functions and values, evaluation of potential and design of wetland restoration and mitigation projects. Read more...

Recreation Studies & Facility Design

On-site resource studies, recreational use assessment, design and implementation of user surveys, development of recreational plans, facility siting and design, cost estimating, demand forecasting, FERC Form 80, agency and public consultation. Read more...

Visual Assessment

Scenic resource inventories, visual impact assessments and mitigation planning, photo simulations and project renderings. Read more...

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