Gibson Dam Hydroelectric - Augusta, MT

Renewable Hydroelectric Project
Renewable Hydroelectric Project
Renewable Hydroelectric Project
Renewable Hydroelectric Project
Project Info: 

A 15 Megawatt renewable hydroelectric project located on an existing United States Bureau of Reclamation irrigation reservoir built in the 1920's. The project will operate in a run-of-release mode, using only the available water released from the reservoir by Greenfields Irrigation District through its formal agreement with Reclamation.


  • 15 Meggawatt
  • Approx. 43 Gwh annual renewable energy
  • Existing 1,296 acre reservoir
  • Existing concrete arch dam, owned by US Bureau of Reclamation
  • 184-ft head
  • 3,050 cfs max outlet works flow
  • 120-ft x 60-ft powerhouse


  • Install two 6.75 MW Francis Turbines 
  • Install one 1.5 MW Francis Turbine 
  • Cast in place concrete substructure
  • 42-inch temporary bi-pass steel piping
  • Two 96-inch dia. steel penstocks
  • One 96-inch dia. x 48-inch dia. bifurcation
  • 96-inch Steel pipe bifurcations
  • Relocate two 15 ton jet flow gate valves from valve house to new powerhouse
  • Temporary Cofferdam
  • Pre-fabricated steel super structure
  • 44 ton overhead crane
  • 10 ton mono rail crane
  • Bulkhead gates
  • 3,000 s.f maintenace building