Documents filed under Impact on Bats from Vermont
The Sheffield Wind Energy facility, a 40 megawatt project that went into service in October 2011, released the first season of bird/bat mortality. Total bird fatality estimates for the project site for the entire season was 211 (95% CI: 147, 321), with an estimated 13.17 birds killed per turbine (95% CI: 9.20, 20.05). A total of 87 bats of three species from 1 April-31 October, all of which were migratory tree-roosting bats. Bat carcasses were found at all 16 turbines. The full report can be found by clicking on the links at the bottom of this page.
The Vermont Public Service Board completed hearings on the proposed Georgia Mountain wind energy facility. The Vermont Agency of Natural Resources (ANR), an intervenor in the proceedings, was highly critical of the project's potential impact on the natural environment including resident and migratory bats. The ANR submitted the document at the link below to the Public Service Board detailing its recommendation for findings to the Board. An excerpt from the document pertaining to bat mortality is provided below.
Ridge Protectors was an intervenor on the Sheffield Wind case before the Vermont Public Service Board. This petition letter was sent to the US Fish and Wildlife Service in response to the requirement that UPC Wind, the developer, secure a federal permit for wetlands impacts at the site.
This document includes studies in Maine, Maryland, Minnesota, New Hampshire, New York, Pennsylvania, Vermont, Virginia and West Virginia.
As a general comment, the Service appreciates the fact that UPC Wind has conducted radar and acoustic studies on bird and bat migration and bat activity at Hardscrabble Mountain and other locations at or near the proposed project. We believe the radar, visual, and acoustic information contained in the above-referenced reports is useful, but that it is not sufficient to demonstrate, at an appropriate scale, the spatial and temporal uses of the airspace over Granby, Libby, Barrett, and Norris Mountains by birds, bats, and insects.
Below are two Phase I Avian Risk Assessments reports, prepared by Paul Kerlinger, for Vermont's East Haven Wind Farm (July 2003) and New Hampshire's Lempster Mountain Wind Power Project (June 2005). Phase I assessments have proven inadequate in assessing mortality at several sites in the U.S. including Mountaineer in West Virginia and Meyersdale in Pennsylvania. The US Fish and Wildlife Interim Wind/Wildlife Guidelines calls for multi-year evaluation of avian and bat activity using remote sensing.
ORDER IT IS HEREBY ORDERED, ADJUDGED AND DECREED by the Public Service Board of the State of Vermont that: 1. The findings, conclusions and recommendations of the Hearing Officer are hereby adopted, as modified above. 2. The proposed Project will not promote the public good of the State of Vermont, and a certificate of public good shall not be issued pursuant to 30 V.S.A. § 248. Dated at Montpelier, Vermont, this 17th day of July , 2006.
...additional radar studies would be required to see if spring migration patterns are different than those measured in the fall. Typically spring migration is shorter than fall migration with fewer numbers in the shorter period of time. How this will affect the numbers of birds passing through the rotor swept volume is unknown. It is important to determine the seasonal timing, altitude and numbers of migrant birds passing over the proposed project site and the effects of weather upon their passage over a greater part of the whole year. In addition, it is possible to determine some of the bird and bat species passing through the project site by accoustical sensors to determine which species, that make vocal calls, are migrating through the site.