Library filed under Icing from USA
Samuel Bonacci, a spokesman for the college, said the ice flew off the turbine’s blades Tuesday morning, landing on the building and a parking lot used by faculty and staff. It broke a hole in the skylight.
“The PSB has sent us a clear message that we may as well stop filing complaints when GMCW is in violation,” said Melodie McLane, who issued the complaint.
At a special hearing Thursday, representatives from Georgia Mountain Wind appeared before the Vermont Public Service Board to appeal a ruling that wind turbines have violated noise and weather-related specifications listed in the project’s certificate of public good.
Researchers who worked near the 400-foot high wind turbines on peaks above the proposed Balsams ski area say there is reason to be worried about people getting too close: They saw chunks of ice being thrown and found ice craters and broken saplings 930 feet from a turbine.
A hearing officer for the Public Service Board has recommended that Green Mountain Community Wind — the company led by Vermont renewable-energy pioneer David Blittersdorf — be found in violation of its permit for operating wind turbines on Georgia Mountain with iced blades. ...The iced blades produced unusually loud noise, said Melodie McLane.
Dixville Capital’s attorney is working out an safety plan to address the board’s concern about ice throw and other potential hazards around the Granite Reliable wind towers (owned by Brookfield Power) in the expanded high-elevation ski area, based on an engineer’s report, board attorney Bernie Waugh reported.
In March, the Public Service Board received reports that turbines on Georgia Mountain were operating with dangerous amounts of ice on the blades. The PSB announced this week that it will investigate the allegations.
Warning from the Cogar Volunteer Fire Department: Please beware of large chunks of ice being launched great distance by the wind turbines in our area! Please use extreme caution and stay a safe distance away from them. We have seen 3 wires of new barbed wire fences broken by ice chunks from the blades of these massive machines. The pictures of the ice chunks below were recovered about 125 yds from the base of a turbine about 4:30 pm this afternoon. Much larger and thicker pieces had impacted closer to the base.
Using an industry rule of thumb, the setback for turbines likes those in the North Country would be about 800 feet, says Rene Cattin, a Swiss researcher who studies wind turbines in cold weather. But, Cattin said, his research shows that ice isn’t thrown more than about 500 feet. However, there are safety issues beyond ice throw, issues that could occur year-round.
The resort's redevelopment remains contingent on an expansion of its ski area, which, if enlarged, would be near at least half a dozen Granite Reliable Power (GRP) wind farm turbines in Dixville, on land owned by Bayroot LLC.
Wind developers play down the issue of ice throw until the plant is operating. After that, even hardhats are not enough to protect persons or property from flying chunks.
This 300-foot industrial-scale turbine (600 kw) in Newburyport, MA is sited just 319-feet from the public pedestrian rail trail, 350-feet from heavily-traveled U.S. Route 1, and 800-feet from the nearest residence. During the public hearing process, the developer insisted "[the turbine] was a long way from the rail trail and if the ice did shed it would be directly below." This photo is provided to Windaction.org by concerned residents in the City of Newburyport, MA. A video showing the ice can be viewed here: http://www.windaction.org/videos/20143 .
This 300-foot industrial-scale turbine (600 kw) erected in Newburyport, MA in January 2009 is sited just 319-feet from the public pedestrian rail trail, 350-feet from heavily-traveled U.S. Route 1, and 800-feet from the nearest residence. Duration: 12 seconds
Video by Gerry Myer, town of Byron, Wisconsin. Residents inside this industrial wind farm in Fond du Lac County, Wisconsin were told ice throw from turbine blades would not be a problem because the turbines automatically shut down when ice and snow build up on the blades. The turbines are 400 feet tall, with a blade span wider than a 747. They appear to be turning slowly because they are so large, but the tip speed on the blades ranges from 90 to 180 miles an hour. Even a small piece of ice thrown at that speed presents a hazard. Wind developers downplayed the problem during the permitting process for this wind farm, saying ice throw is not anything to worry about. The Public Service Commission of Wisconsin took their word for it. These turbines went on line in March of 2008.
Residents inside this industrial wind farm in Fond du Lac County, Wisconsin were told that ice throw from turbine blades isn't a problem. They were told that if ice forms on the blades, the turbine automatically shuts down. After seeing a piece of ice the size of a bed sheet come flying down from this wind turbine, the resident who shot this video decided to get out his video camera.
The wind industry concedes that, as with all tall things (buildings, for example, or trees), ice and snow can build up and, eventually, fall down, creating a hazard to people and structures below. But the industry denies that "ice-throwing" - another concern surrounding wind power - is a problem. ...But a 2006 publication by G.E. Energy, a maker of large wind turbines, warns that "rotating turbine blades may propel ice fragments some distance from the turbine - up to several hundred meters if conditions are right."
Here is a reprint of an email about ice throw at Green Mountain Power's Searsburg wind energy facility in Searsburg Vermont. The email was written by John Zimmerman to an American Wind Energy Association listserv in 2000. Mr. Zimmerman managed the development of the Searsburg facility
The pros and cons of building wind turbines near public roads took center-stage at last week's Grant County Commission meeting.
Dominion Power and the Grant County Commission responded to a Mount Storm resident's concerns about the potential for ice on the blades of wind turbines this winter. Bruce Halgren of Mount Storm appeared before commissioners Jim Wilson, Charlie Goldizen and Jim Cole Tuesday. He said that he is concerned that the proximity of some of the NedPower wind turbines being constructed along Grassy Ridge Road could present a safety hazard to motorists from ice and debris being thrown off by the turbine blades in the wintertime.
The reception was somewhat on the chilly side, Tuesday, when a pair of mountaintop residents brought their protests about windpower electricity to the Grant County Commission. Residents Bruce Halgren and Richard Spicer appeared before commissioners as part of a campaign to reduced the number of windpowered turbines being erected in the community by NedPower and Shell Renewables and Hydrogen. The pair asked commissioners to oppose six turbines to be constructed within 820 feet of public roadways. They say the turbines present an "ice throw" hazard to motorists on Grassy Ridge Road and state Route 93.