Documents filed under Impact on Birds from California

Tule Wind Eagle Permit Rejection

Usfws_tule_eaglepermitreject_8-1-14_thumb The US Fish and Wildlife Service denied Iberdrola's request for an eagle take permit. The rejection letter is provided below and can be accessed by clicking the link on this page. Iberdrola's application was one of the first to seek a 30-year term on the permit. In addition to the FWS letter, you can also view Iberdrola's cover letter submitted with its permit application where the company cites its interest in a long-term permit. 
1 Aug 2014

Avian and bat fatality rates at old-generation and repowered wind turbines in California

Smallwood_and_karas_2009_altamont-1_thumb This important report, which appeared in the Wildlife Society's Journal of Wildlife Management, details the effect on raptor and bird mortality following repowering a portion of the Altamont Pass Wind Resource Area (APWRA) in California (USA). Repowering involves removing older generation towers and replacing them with higher capacity -- and potentially better sited -- units. The abstract to this report appears below. The full report can be accessed by clicking on the link at the bottom of this page.
1 Sep 2009

Bird fatality study at Altamont Pass Wind Resource Area (APWRA)

M21_2008_altamont_bird_fatality_report_01_25_08_thumb The current management goal for the Altamont Pass Wind Resource Area (APWRA) is to significantly and substantially reduce the fatalities of birds resulting from collisions with the wind turbines and other turbine-related incidents. This is the first report on bird/bat mortality rates at the APWRA since the management plan was implemented. "The results of this study show an apparent continued trend of high bird fatalities, both raptors and non-raptors at APWRA. The number of annual fatalities does not appear to be decreasing despite implementation of specific conservations measures including the cross-over winter shutdown program, high risk turbine removal and blade-painting."
25 Jan 2008

Developing Methods to Reduce Bird Fatalities in the Altamont Pass Wind Resource Area

Wind turbines in the Altamont Pass Wind Resource Area (APWRA) provide on average 1.1 billion kilowatt-hours (kWh) of emissions-free electricity annually, enough to power almost 200,000 average households per annum, but these turbines also kill birds that are legally protected, and have been doing so for decades. This five-year research effort focused on better understanding the causes of bird mortality at the world's largest wind farm. Researchers studied 2,548 wind turbines and combined their data with results from 1,526 wind turbines they had studied previously. They sought to: (1) quantify bird use, including characterizing and quantifying perching and flying behaviors of individual birds around wind turbines; (2) evaluate flight behaviors and the environmental and topographic conditions associated with them; (3) identify possible relationships between bird mortality and bird behaviors, wind tower design and operations, landscape attributes, and prey availability; and (4) develop predictive, empirical models that identify turbine or environmental conditions that are associated with high vulnerability. Researchers concluded that bird fatalities at the APWRA result from various attributes of wind turbine configuration and placement, and that species-specific behavior plays a large role in how each contributory factor affects mortality. The report details numerous specific observations. Researchers identified and evaluated possible measures to mitigate bird mortality in the APWRA. They offer recommendations to discontinue or modify some current management actions, to implement new ones immediately, and to experiment with others. Data presented in the report support these recommendations. The results suggest that repowering with carefully placed, modern wind turbines mounted on taller towers may be the preferable means to substantially reduce bird mortality.
1 Aug 2004

http://www.windaction.org/posts?location=California&topic=Impact+on+Birds&type=Document
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