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Bats and Wind Farms

In 2007, Kettles Hill Wind Energy Inc. developed a 63 MW wind power project, called the Kettles Hill Wind Farm, consisting of 35 turbines. ENMAX Green Power Inc. purchased the wind farm in June 2008. Post-construction bat surveys were conducted in 2007, 2008 and 2009. These surveys consisted of carcass searches around turbines and acoustic surveys using anabat detectors mounted on turbine nacelles (in 2007 and 2009 only).

Compared with survey data from 2007 and 2008, in 2009 fewer bat carcasses were found on average per turbine. Although bat passes (the number of bats flying) were somewhat lower than 2007, this does not appear to be correlated to the much lower bat mortalities. Further investigation is required to determine the significance of these findings.

ENMAX continues to be engaged with the provincial government and the wind energy industry on the latest science and research into reducing bat mortality at wind farms.


Osprey Nesting Platforms

In March 2009, ENMAX Power, in collaboration with The City of Calgary Parks and the Weaselhead Preservation Society, installed two osprey platforms on the north and south sides of Weaselhead Flats park. The platforms are the first in the area and were provided to attract ospreys and bald eagles looking for suitable nesting locations.

The platform installation followed ENMAX Power's 2008 138 kV transmission line rebuild in the Weaselhead Flats Park. At the conclusion of the rebuild, members of the Weaselhead Preservation Society and The City of Calgary Parks approached ENMAX Power to see if some of the discarded poles could be used for nesting platforms.

Members from ENMAX Power's Transmission Planning and Design group designed the platforms and a biophysical assessment was completed prior to the installation.


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