Bonneville Power Administration
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Completed Wind Projects



Stateline



Image of a groupd of wind turbines.
At the time Stateline was built it was the largest wind farm in the world with a peak output of 300 megawatts (90 megawatts into Bonneville system) and it only took six months to complete. Stateline was developed by Florida Power and Light Energy (FPLE) energized in October 2001.

Stateline is located between Walla Walla and Pasco near the Wallula Junction, Wash., where the Walla Walla River joins the Columbia River. The power generated from the Stateline wind farm is collected at the Nine-Mile substation at 34.5-kilovolt (kV), of which 210 megawatts is delivered to PacifiCorp to their 230-kV Wallula substation and 90 megawatts is stepped up to 115-kV and is delivered to the BPA system via the 115-kV Stateline Tap transmission line built by FPLE. The Stateline transmission line heads north and crosses over the Walla Walla River and taps into BPA’s 115-kV Franklin-Walla Walla transmission line.

BPA provided the structures and switches at the tap, metering, relaying, SCADA, and a microwave radio link with Franklin substation.