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Braddock Gated Dam


US Army Corps of Engineers, Pittsburgh District

Project Location

Pittsburgh, PA

Bergmann Locations

Rochester, NY Cranberry, PA
US Army Corps of Engineers New Braddock Dam on the Monongahela River, Pittsburgh PA

US Army Corps of Engineers New Braddock Dam on the Monongahela River, Pittsburgh PA

Provided innovative “in-the-wet” design of a new tainter gated dam on the Monongahela River outside Pittsburgh, PA.

This project utilized two large precast float-in segments for the base of the new dam (265’ & 333’ lengths) with extensive use of precast elements and fabrication of segments at an offsite casting facility. The Bergmann team designed drilled shaft foundations, sheet pile cut-off walls with H-piles and pipe piles, river dredging, underwater tremie concrete placements, piers, trunnions and tailrace structures for the new $122M dam. Innovative construction methods allowed the dam to be built without the use of cofferdams for cost and schedule savings, as well as reduced river impacts.

Project Highlights

  • Concept study of "in-the-wet" (no cofferdam) options
  • Float-in design and construction methods
  • NISA analysis of large concrete secetions
  • Innovative navigation design (DM & final design documents in 10 months)
  • 225 final plans & specifications package
  • 3-D animated video production (14-minute concept video and 40-minute detailed video)
  • Extensive construction phase services (EDC) over five-year period

2005 | Award of Excellence in the Constructed Project - United States Society on Dams (USSD)

2004 | Special Recognition Award - Preservation Citation of Merit - American Institute of Architects (AIA) Rochester Chapter

2004 | Finalist for the Outstanding Civil Engineering Achievement Award - American Society of Civil Engineers (ASCE) OPAL Awards