Gov. Inslee approves plans for WA’s largest wind turbine farm

Wind turbines on a hill near Ellensburg, Wash., November 19, 2022. Washington’s electricity needs are expected to double by 2050. (Genna Martin/Cascade PBS)
Gov. Jay Inslee has approved a revised plan to populate the Horse Heaven Hills south of Kennewick with the largest wind turbine farm in Washington.
His approval leaves intact more than three-quarters of the originally requested number of turbines. While Inslee gave his approval on Oct. 18, his office and the Energy Facility Site Evaluation Council confirmed that approval to Cascade PBS on Friday.
This Horse Heaven Hills project has aroused the most contentious disagreement among several clean energy projects in Washington. The proposed turbine farm has drawn scrutiny for its possible impact on Native cultural sites and on wildlife in the area, as well as its visibility from the Tri-Cities. Tri-Citians have also questioned the effects of the wind farm on ferruginous hawk nests.
In September the Site Evaluation Council voted 4 to 3 to approve the recommendation. Opponents of the project have until Dec. 17 to appeal the decision to the state’s courts.
Inslee has been pushing new wind turbine projects and solar panel farms to be located across the state as part of his campaign to trim the state’s carbon emissions. In an Oct. 18 letter posted to the Council’s website last week, Inslee said that the Council had adequately addressed the environmental, cultural and community impacts of the project. But the letter also had an undercurrent of impatience over the delay, since the Horse Heaven Hills project took most of this year to be approved.
“We will not meet our state’s urgent clean energy needs if the path to a final recommendation from the Council spans multiple years and contains conditional micrositing process requirements that further prolong final siting approval for a significant portion of the primary project components,” Inslee wrote. “I strongly encourage the Council to identify opportunities to increase its efficiency and provide for more timely decision-making. You can expect my office to engage with you on this critical issue before the end of my administration.”
The original plans by Scout Clean Energy of Boulder, Colorado, called for either a maximum of 147 670-foot-tall wind turbines or 222 500-foot turbines along a 24-mile east/west stretch of the Horse Heaven Hills, producing a projected 1,150 megawatts of wind power. The plans also called for two 500-megawatt solar panel farms on the east and west sides of the 24-mile stretch.
After some back-and-forth between the Council and Inslee’s office, the council set a 0.6-mile buffer around 60 to 70 ferruginous hawk nests, a 0.25-mile buffer around historic Native American fire sites and a one-mile buffer alongside Webber Canyon, another culturally sensitive spot for Indigenous nations. The Council ordered that the eastern solar farm be removed from the plan because of its proximity to sensitive Native cultural sites.
If 500-foot turbines are installed, that would trim the number of turbines by approximately 50, from 222 to roughly 172. If 670-foot turbines are installed, that would cut the number of turbines by approximately 34, from 147 to roughly 113. More precise figures will be calculated later.