Project Examples

DTA engineers have experience in civil engineering design for hydroelectric projects, site development, and linear projects including wind power, transmission lines, and gas pipelines.

We have extensive experience in all aspects of dam safety work under Part 12 of the Federal Energy Regulatory Commission regulations, including:

• Independent Dam Safety Inspections
• Potential Failure Mode Analysis
• Preparation of Supporting Technical Information
• Dam stability analysis
• Dam rehabilitation/reconstruction for stabilization and increasing spillway capacity

Design of hydroelectric structures and project facilities includes:

• Concrete gravity and earthen embankment dams and water retaining structures
• Uncontrolled and gated spillways
• Intake structures
• Water conveyance systems
• Fish passage systems
• Powerhouses

DTA has experience in the design of equipment associated with spillway and intake structures including:

• Flashboard systems (including inflatable systems)
• Trashracks
• Trash rake systems
• Gates

General civil design experience also includes:

• Site grading roadways
• Erosion and sedimentation control
• Stormwater management
• Riverbank stabilization

SERVICES

• Siting Studies
• Dam Safety Assessment
• Structural Evaluation and Design
  • Concrete, Wood, Steel and Hydraulic Structures          
• Design and Specifications
• Dam Design
  • Gravity, Arch, Embankment, RCC
• Gate Design, Analysis, Inspection and Evaluation
• Penstock Design, Analysis, Inspection and Evaluation
• Roads and Bridges             
• SPCC Plans

Project Examples

Graham Lake Dam Rehabilitation

When Bangor Hydro Electric needed a consultant to solve embankment stability issues on the Graham Lake Dam, they hired the expert engineers at DTA. The project was the subject of papers presented at the ASCE 1993 Geotechnical Specialty Conference on Dam Rehabilitation, the Association of State Dam Safety Officials (ASDSO) 1994 Annual Convention and ASCE’s 1995 Seismic Design in the State of Maine Technical Seminar. Read More...

Schaghticoke Rehabilitation

When Orion Power New York faced disruption to a water conveyance system, DTA engineers completed the extensive Schaghticoke penstock and surge tank replacement on a significantly compressed schedule.
Read More...

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