SCOOTENEY INLET
SCOOTENEY OUTLET
The Scooteney Outlet releases water from Scooteney Reservoir into Potholes East Canal. Scooteney Reservoir has significant storage capacity so level controls from the Project is not required to be instantaneous. However, flow must be re-established in a reasonable time-frame to maintain canal flow.
PE 46A Wasteway
The Scooteney Inlet Project utilizes water dropping into Scooteney Reservoir. The project infrastructure would include a new intake, short power canal, powerhouse, and discharge into the downstream canal. The low head of the site and the likely shallow bedrocks are disadvantages. The larger capacity and short power canal required are advantages for the project.
PROJECT DATA SUMMARY
Capacity: 640kW
Annual Energy Estimate: 2,730 MWh
Capacity Factor: 49%
Turbine Type: Horizontal Francis
Turbine Design Flow: 50 cfs
Head: 145 feet
Transmission Line Length: 500 ft
Maximum Emergency Canal Flow: 187 cfs
Flow Pattern: Variable flow during the irrigation season, negligible flow during the non-irrigation season (Nov – March).
Project Coordinates: 46°30’49.32”N, 119°14’18.48”W
The PE 16.4 Wasteway Project will utilize excess water from the irrigation system as it drops from the Potholes East Canal into the Columbia River. The project will consist of a new intake, buried penstock, and compact powerhouse on the discharge canal to the Colombia River. The relatively high head and year round flow make this site attractive. There may be an endangered plant in the general area that could influence powerhouse sighting and penstock routing.
MESA CHECK
(PEWC 1973 Drop)
The Mesa Check project will utilize flow that would normally pass through the existing check structure. The project would consist of a new intake, bypass, concrete power canal, powerhouse, and tailrace. The advantages of this project are the relatively high available flows. The key challenges are the low head and the requirement to maintain very tight canal level control.
PROJECT DATA SUMMARY
Capacity: 1,800 kW
Annual Energy Estimate: 6,860 MWh
Capacity Factor: 44%
Turbine Type: Single Kaplan Pit Turbine
Turbine Design Flow: 1,500 cfs
Head: 16.5 feet
Transmission Line Length: 200 ft
Maximum Emergency Canal Flow: 1,800 cfs
Annual Flow: Flow only during irrigation system, runoff and drainage flow off season.
Project Coordinates: 46°35’25.41”N, 119°3’7.38”W
PE 16.4 Wasteway
The PE46A Wasteway Project will generate power from water dropping into the Potholes East Canal. The project will consist of a new intake, buried penstock, and compact powerhouse discharging into the Potholes East Canal. This project has higher head and a relatively short penstock which are advantages. The main challenges are available flows only during the irrigation season and the project’s small capacity.
PROJECT DATA SUMMARY
Capacity: 2,400 kW
Annual Energy Estimate: 7,510 MWh
Capacity Factor: 36%
Turbine Type: Vertical Kaplan
Turbine Design Flow: 1,400 cfs
Head: 23 feet
Transmission Line Length: TBD
Maximum Emergency Canal Flow: 3,900 cfs
Flow Pattern: Variable flow during the irrigation season, negligible flow during the non-irrigation season (Nov – March).
Project Coordinates: 46°43’20.01”N, 119°2’8.27”W
PROJECT DATA SUMMARY
Capacity: 1,000 kW
Annual Energy Estimate: 4,500 MWh
Capacity Factor: 51%
Turbine Type: Two VLH Turbines
Turbine Design Flow: 1,200 cfs
Head: 12 feet
Transmission Line Length: 2,700 ft
Maximum Emergency Canal Flow: 1,800 cfs
Flow Pattern: Variable flow during the irrigation season.
Project Coordinates: 46°40’8.33”N, 119°1’57.51”W
PROJECT DATA SUMMARY
Capacity: 1,500 kW
Annual Energy Estimate: 8,100 MWh
Capacity Factor: 62%
Turbine Type: Vertical Axial Flow Kaplan
Turbine Design Flow: 180 cfs
Head: 115 feet
Transmission Line Length: 1,000 ft
Maximum Emergency Canal Flow: 770 cfs
Annual Flow: Year round flow
Project Coordinates: 46°30’19.97”N, 119°15’27.46”W