ROZA POWERPLANT
Roza Diversion Dam
Roza Powerplant
| Plant Contact: | Gerald Kelso ,
Area Manager Upper Columbia Area Office |
| Telephone Numbers: | Phone: (509) 575-5848 Fax: (509) 454-5611 |
| E-Mail Address: | gkelso@pn.usbr.gov |
| Reclamation Region: | Pacific Northwest |
| NERC Region: | Western Electricity Coordinating Council, Northwest Power Pool Area |
| PMA Service Area: | Bonneville Power Administration |
| Project Authorization: | The President approved the Yakima Project on November 6, 1935. |
| Project Purposes: | The Yakima Project provides irrigation water for a comparatively narrow strip of fertile land that extends for 175 miles on both sides of the Yakima River in south-central Washington. The irrigable lands presently being served total about 465,000 acres. The Roza Division, a unit containing 72,511 acres of land north of the Yakima River, extends from the vicinity of Pomona to a point north of Benton City. The distribution system is supplied by the Roza Canal, which originates at the Roza Diversion Dam on the Yakima River about 10 miles north of Yakima. The Roza Powerplant is adjacent to the Roza Canal, 3 miles from Yakima. |
| Plant Facts: | The Roza Powerplant develops 12,937 kilowatts. More than 70 miles of transmission lines deliver power to pumping plants in the Roza Division. Roza Diversion Dam is a concrete weir structure 67 feet high. The crest is 486 feet long. |
| Plant Purpose: | 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. |
| Plant History: | 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. |
| Present Activities: | Normal operations |
| Future Planned Activities: | None |
| 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. |
| River: | Roza Main Canal |
| Plant Type: | Conventional |
| Powerhouse Type: | Above Ground |
| Turbine Type: | Propeller |
| Original Nameplate Capacity: | 10,660 kW |
| Installed Capacity: | 12,937 kW |
| Year of Initial Operation: | 1958 |
| Age: | 47 years |
| Net Generation: (FY 2005) |
46,260,812 kWh |
| Rated Head: | 158 feet |
| Plant Factor: (FY 2005) |
40.93 percent |
| Remotely Operated: | No |
| Production Mode: | Intermediate |
Click here for graphs and charts of Roza Powerplant performance.
Click here for information on the Yakima Project.
Revised April 20, 2006 Hydropower Site Map Help