Gibson Dam Hydroelectric - Augusta, MT
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.
Stats:
- 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
Construction
- 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