SERVICES

• Fish Habitat Characterization, GIS Mapping and Quantification
• Fish Collections and Aquatic Biota Population Assessments
• Measures of Effects of Impoundment Fluctuations on Fish and Aquatic Habitat
• Instream Flow Studies, Including IFIM Delphi, Watershed and other Instream Flow Study Techniques
• Upstream and Downstream Fish Passage Studies and Fishway Design
• Entrainment and Mortality Studies
• Fish Habitat Enhancement/Mitigation
• Other Specialized Field and “Desk-Top” Aquatic Biology Studies
• Assessment of Ecology Interactions
• Radio Telemetry

Fisheries investigation experience includes:

• Fish collections including trapping and electrofishing
• Spawner surveys
• Aquatic bioassessments
• Macro-invertebrate investigation

Instream flow experience includes:

• IFIM 1D (PHABSIM) and 2D flow modeling
• Time series (multi flow, habitat/discharge modeling)
• Small and large stream instream flow assessment
• DELPHI instream flow assessment

Innovative habitat characterization abilities include:

• Helicopter low altitude aerial video habitat assessment
• Instream micro- and macro-habitat investigation
• Habitat frequency, distribution and GIS database mapping

Assessment of fish passage, survival and behavior:

• Radio and acoustic remote, passive and active tracking
• Passive Integrated Transponder (PIT) mass marking and monitoring
• Fishway design evaluations
• Entrainment and mortality

Project Examples

Beardsley/Donnells Project, Middle Fork Stanislaus River, CA, Tri-Dam Project.

DTA personnel executed field studies that required innovative use of current technologies . Aerial video from helicopter and infrared photography was used to map habitats in a mostly inaccessible eight-mile diversion reach and for selection and agency approval of study sites. Read More...

Penobscot River - Old Town, Milford, Bradley, Maine

Devine Tarbell & Associates, Inc. (DTA) was lead consultant for the relicensing of this 7.66 MW hydroelectric project on the Penobscot River in Old Town, Maine. The powerhouse contains 11 turbine-generator units. The dam and powerhouse measure approximately 1,425 feet long. The 160-acre project impoundment contains approximately 1,600 acre-feet of storage. Read More...