Tiber Hydroelectric Dam – Chester, MT

Tiber Dam is one of the largest earth-fill dams in the world. In 2003, Tiber Montana, LLC received approval to install a new hydroelectric facility alongside the existing spillway. Montana Fabrication Works Corporation fabricated and delivered the steel scroll casing and draft tube for the new 7.5 MW vertical-shaft Francis turbine and generator. The 21’ scroll case (maximum dimension) has a 7.5’ inlet diameter.The draft tube is 31’ long, 13’ high, and 17’ wide.

  • Tiber Dam scroll case Tiber Dam draft tube
  • Montana Fabrication Works also fabricated the bifurcation and the 8’ diameter penstock for the project