Plans for the Roza Division were initiated in 1932. The powerplant was completed in conjunction with that plan in 1958. It has been operated since at the maximum capacity allowed by available flows, weather, and maintenance.
Project Authorization
The President approved the Yakima Project on November 6, 1935.
Plan
The Roza Powerplant provides power at the cost of production to operate pumps on the Roza Irrigation District. The Roza Irrigation District pumps to 27,700 acres of their irrigation deliveries. Any other power generated is marketed through the BPA.
The Roza Powerplant develops 12,937 kilowatts. More than 70 miles of transmission lines deliver power to pumping plants in the Roza Division.
Present Activities
Normal operations
Special Issues
A major contributor to the cost of O&M at the Roza Powerplant is the cost of maintaining about 10 miles of delivery canal and over 70 miles of transmission line.
General
NERC Region
Western Electricity Coordinating Council, Northwest Power Pool Area
PMA Service Area
Bonneville Power Administration
Plant Type
Conventional
Turbine Type
Francis
Original Nameplate Capacity
10,660 kW
Installed Capacity
12,937 kW
Age
54 years
(Fiscal Year)
2011
Rated Head
158 ft
Plant Factor
77.7 percent
Production Mode
Intermediate
Remotely Operated
No
Powerhouse Type
Above Ground
Year of Initial Operation
1958
River
Roza Main River
Contact
Contact
Title: Area Office Manager, Columbia-Cascades Area Office Fax: 509-575-5848 Phone: 509-454-5611
More Information about the U.S. Bureau of Reclamation