Save the Birds: Altamont Pass Wind Turbines to be Upgraded

Posterchild for wind-bird interaction will get new, bigger turbines.

2 min read
Save the Birds: Altamont Pass Wind Turbines to be Upgraded

The Altamont Pass wind farm has long been cited by conservationists as a primary reason why wind turbines can sometimes do more harm than good. The 5400-turbine site is so crowded with relatively small windmills that it kills thousands of birds every year, including about 70 federally protected golden eagles as well as other raptors. After decades of operation, though, the Altamont wind farm is finally getting a facelift.

NextEra Energy agreed to upgrade many of the 2,400 turbines it owns at Altamont; it will replace small turbines with fewer larger ones, resulting in a similar power generation capacity of about 240 megawatts. Having fewer turbines spaced slightly farther apart will theoretically reduce the risks for birds who fly through the migration corridor.

The agreement, which could see 80 megawatts of turbines upgraded by the end of 2011 if permitting happens fast enough, stems from a lawsuit filed by the Audubon Society aimed at protecting the birds of the Altamont area. “This agreement addresses the problem arising throughout the state: balancing the need for renewable energy generation with subsequent impacts to wildlife,” said Bob Power, Executive Director of the Santa Clara Valley Audubon Society, in a press release [pdf].

It will be interesting to see results from subsequent monitoring of wildlife impacts at Altamont. It does seem likely that fewer, bigger turbines will reduce bird fatalities, but what about bats? Bats most likely die around wind turbines not because of impacts but because of barotrauma: sudden drops in air pressure that exist immediately around the spinning turbine blades basically cause the bats' lungs to explode. Will bigger turbines create bigger pressure drops, and thus more bat fatalities?

It is difficult to predict, but at least one study [pdf] showed that higher turbines do increase bat fatalities. Still, it is undoubtedly progress to try and maintain the energy output of Altamont while minimizing an ongoing point of contention in renewable energy circles by reducing bird fatalities.

(Image via Xah Lee/Wikimedia Commons)

The Conversation (0)
This photograph shows a car with the words “We Drive Solar” on the door, connected to a charging station. A windmill can be seen in the background.

The Dutch city of Utrecht is embracing vehicle-to-grid technology, an example of which is shown here—an EV connected to a bidirectional charger. The historic Rijn en Zon windmill provides a fitting background for this scene.

We Drive Solar

Hundreds of charging stations for electric vehicles dot Utrecht’s urban landscape in the Netherlands like little electric mushrooms. Unlike those you may have grown accustomed to seeing, many of these stations don’t just charge electric cars—they can also send power from vehicle batteries to the local utility grid for use by homes and businesses.

Debates over the feasibility and value of such vehicle-to-grid technology go back decades. Those arguments are not yet settled. But big automakers like Volkswagen, Nissan, and Hyundai have moved to produce the kinds of cars that can use such bidirectional chargers—alongside similar vehicle-to-home technology, whereby your car can power your house, say, during a blackout, as promoted by Ford with its new F-150 Lightning. Given the rapid uptake of electric vehicles, many people are thinking hard about how to make the best use of all that rolling battery power.

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