State of Vermont considers 1.25 mile (2 km) setbacks (USA)
Feb 18, 2010
A group of Vermont legislators has introduced a bill (H.677) requiring the following setbacks and noise/vibration limits for wind turbines exceeding 0.49 MW. Click here for the full text of the bill.
Setbacks. At a minimum, a wind turbine shall be set back horizontally:
- One and one-quarter miles from 1 an occupied building, if the elevation change between the wind turbine and the occupied building is equal to or less than 500 feet.
- Two miles from an occupied building, if the elevation change between the wind turbine and the occupied building exceeds 500 feet.
- One-half mile from the closest boundary of the parcel on which the wind turbine will be located.
- One-third of a mile from any public highway or right-of-way and from any above-ground utility line or facility. However, this subdivision shall not apply to an electric line that directly connects a wind turbine to a substation or other utility facility.
Sound limits. At a minimum, a plant subject to this section shall comply with each of the following:
- Audible sound limit. No plant shall be located so as to generate postconstruction sound levels that exceed preconstruction background sound levels by more then 5 dBA.
- Low frequency sound limit. The LCeq and LC90 sound levels from a wind turbine at the receiving property shall not exceed the lower of either:
- An LCeq-LA90 greater than 20 dB outside any occupied building; or
- A sound level of 50 dBC (LC90) from 1 a wind turbine, without other ambient sounds, for a parcel the closest boundary of which is located one mile or more from a state highway or Class 1 or 2 town highway, or of 55 dBC (LC90) for a parcel with a boundary closer than one mile to such a highway.
- General sound limit. Sound from a plant subject to this section shall not exceed 35 dBA within 30 meters of any occupied building.
- Demontrating compliance with sound limits. Use of the Kamperman-James Guidelines shall be required in demonstrating compliance with the sound limits of this subsection.
Dr. Pierpont has been joined by Dr. F. Owen Black (Neurotologist: regarding the vestibular symptoms of Wind Turbine Syndrome), Dr. Joel F. Lehrer (Otolaryngologist: likewise regarding vestibular symptoms of WTS), and Dr. Stanley M. Shapiro (Cardiologist: regarding the cardiac repercussions of sleep deprivation associated with WTS) in supporting this proposed legislation. They have been joined by nationally-ranked noise engineer, George Kamperman.