BrightSource wants to build a second tower-based solar farm in California's Riverside County, east of Palm Springs. But the state Energy Commission in December proposed that the company instead use more conventional technologies, such as solar panels or mirrored troughs. One reason: the BrightSource system appears to be scorching birds that fly through the intense heat surrounding the towers, which can reach 1,000 degrees Fahrenheit.
The company, which is based in Oakland, Calif., reported finding dozens of dead birds at the Ivanpah plant over the past several months, while workers were testing the plant before it started operating in December. Some of the dead birds appeared to have singed or burned feathers, according to federal biologists and documents filed with the state Energy Commission.
Regulators said they anticipated that some birds would be killed once the Ivanpah plant started operating, but that they didn't expect so many to die during the plant's construction and testing. The dead birds included a peregrine falcon, a grebe, two hawks, four nighthawks and a variety of warblers and sparrows. State and federal regulators are overseeing a two-year study of the facility's effects on birds.
BrightSource thinks it will be able to resolve the problem of bird deaths and build more big plants in California and elsewhere.
In response to BrightSource's blueprint for its second big solar farm in Riverside County, near Joshua Tree National Park, biologists working for the U.S. Fish and Wildlife Service told state regulators that they were concerned that heat produced by the project could kill golden eagles and other protected species.
The agency also is investigating the deaths of birds, possibly from colliding with structures, found at two other, unrelated solar farms. One of those projects relies on solar panels and the other one uses mirrored troughs. Biologists think some birds may have mistaken the vast shimmering solar arrays at all three installations for a lake. (WSJ, 2/12/2014)