Princeton University Dam

Princeton, NJ

Phase I structural repairs to the university's historically significant Carnegie Lake Dam

KCC submitted the winning proposal to Princeton University Facilities Organization for this fixed-price contract to perform the Phase I structural repairs to the historically significant Carnegie Lake Dam.

Lake Carnegie was formed by the dam and ... has become  home to the Princeton University rowing team

This included repair work to the west abutment and extended 190 feet along the dam into the Millstone River. The 600-foot long concrete dam was built across the Millstone River in 1906 with a generous donation from Andrew Carnegie. Lake Carnegie was formed by the dam and has become a coveted feature to the local community as well as home to the Princeton University rowing team, which uses the lake for crew racing competitions.

Project Highlights

  • An upstream coffer dam was designed and constructed by KCC using sand-filled super bags along with steel sheet piles to hold back 9 feet of water and create control for dry working conditions
  • All work in the water and on the dam was performed in compliance with NJDEP and NJSHPO permits that were issued for the project
  • Typical section through the concrete dam is approximately 5-foot thick and 12-foot high with 4-foot-thick curved buttresses placed roughly 28 feet on center on the downstream side
  • After assessing repairs in earlier years with a shotcrete layer, the design team required the entire 2-inch to 3-inch shotcrete layer to be removed from the dam in order to expose the underlying conditions after a century of wear
  • There were six different types of repair strategies prepared by the design team and after further removal and exposure of more damage than originally expected, KCC and the design team adapted to such changes and developed new solutions to remedy without work interruption

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