Entries in wind turbine shadow flicker (28)

10/13/09 The Birds, the Bats and the proposed Glacier Hills Wind "Park"

Better Plan continues with our look at the Environmental Impact Statement (EIS) for the Glacier Hills Wind Farm proposed for the Towns of Randolph and Scott in Columbia county.

Download the entire EIS by clicking here

Today we're looking at the section called ENVIRONMENTAL EFFECTS OF THE GLACIER HILLS WIND PARK which begins on page 24 with the issue of bird mortality.

We're very troubled to learn the pre-construction bird and bat studies were done by same utility that is proposing the project.

Here's what the EIS says about birds:

"The potential for avian mortality and displacement from feeding and nesting habitat is a major environmental concern. Bird collisions with turbine blades and towers have been widely reported in this country and abroad.

WEPCO conducted a pre-construction avian study of the project area between mid-June 2007 and mid-June 2008.1 The methodology used and the timing of the survey was consistent with the Breeding Bird Survey methodology and provided a general assessment of bird use in the project area during the one-year study period. The avian study did not identify any heavily used local flight paths or any locations in the project area
where bird activity was heavily concentrated.

The surveys recorded observations of 151 bird species.
Three state-listed threatened species were recorded. An additional 20 species that are listed as species of greatest conservation need (SGCN) were observed in the project area.

Almost all project construction would occur on active agricultural lands. Only a small amount of habitat other than agricultural lands would be directly disturbed by the project. Active agricultural lands provide feeding areas for some bird species during migration and winter but provide only limited habitat for nesting birds. The impact to bird habitat from direct habitat removal and from fragmentation of existing habitat would be relatively low."

NOTE: Though the impact to bird nesting habitat would be relatively low, what about the impact to the birds themselves? Concern about the effects of a large scale industrial wind farms on actual bird populations is growing.

According to a new study by the Britain's Royal Society for the Protection of Birds, wind farms can reduce bird numbers by up to half. [click here for source]The research, published in the Journal of Applied Ecology, suggests the most likely cause of the decline is the fact that birds are less likely to live near wind farms because of the noise and development.

In another report, [source]  Purdue University Associate Professor John Dunning says wind turbines  could also pose a threat to animals that share the airspace: “The worry is if you put something dramatically different, like big towers with whirling blades in it, some of the species that previously used that area, might not get killed but they might avoid going into the area,” Dunning said.

Newsweek published a recent report entitled "Birds VS Environmentalists" with the sub-heading:"The wind industry may be green, but it's proving deadly to wildlife"[source] In it, Michael Fry of the American Bird Conservancy says turbines kill three to 11 birds per megawatt of wind energy they produce. Right now, there are about 20,000 megawatts produced in the United States, which can mean—at worst—up to 220,000 bird fatalities a year. With wind energy expected to produce 20 percent of this country's energy by 2030, output would grow tenfold and, environmentalists worry, deaths could increase at a similar rate.

Because the turbines in the Glacier Hills wind farm will cover over 17,000 acres, and because out of the 151 species of birds identified in WEPCO's pre-construction study, 3 species are threatened and 20 more qualifiy as Species of Greatest Conservation Need (SGCN) we believe another independent study should be conducted by a party with no financial interest in providing results required to get approval of this project.

Residents in both the Invenergy wind farm near the Town of Byron and in the Blue Sky Green Field wind farm near the Town of Malone in Fond du Lac and Dodge counties have said there have been fewer birds since the turbines have gone up. Many have specifically mentioned the loss of barn swallows, even on farms where barn swallow flocks have been coming to nest for years.

Wind developers will often say more birds are killed by cats than by wind turbines. True or not, this statement seems intended to make turbine related bird deaths more acceptable.

Scientists study birds killed by wind turbines

By DAVID SCHECHTER / WFAA-TV

www.wfaa.com

13 October 2009

 

When it comes to generating green energy from the wind, Texas leads the way.

But in the pursuit of cleaner energy, there’s also an environmental cost: dead birds and bats killed by turbine blades.

Now a unique research project in North Texas is trying to find out how many are dying and what can be done to save them.

As Texas continues to flip the switch from dirty coal to clean wind, not all is perfectly green.

That’s why Texas Christian University researchers are scanning the base of a wind turbine at Wolf Ridge, outside Muenster, Texas.

“Some of them are obvious that the turbine killed them. Other times you can’t tell,” said field technician Jennifer Ellis of the dead birds she finds.

Among them are raptors, vultures, yellow-billed cuckoos, said Amanda Hale, TCU researcher.

Birds killed by wind turbines pale in comparison to birds killed by cars, buildings and other animals.

“We do know that birds and bats are being affected by wind turbines,” said Hale.

Hale and her team want to definitively determine how many birds and bats are killed by wind turbines.

Her peer-reviewed research project is funded by the nation’s biggest renewable energy company NexTera.

“We’ve actually seen a huge variety of birds,” Hale said.

But it turns out, dead bats are the surprise finding.

Hale did not expect to find any. Instead, her team has found five times more bats than birds.

Why is that a problem?

The bat population is smaller, more susceptible to disease, and slower to reproduce.

“If we add wind on top of it, it’s enough to be a real concern,” said Hale.

Back at the Hale’s laborartory at TCU, they carry out tests.

“We can measure how good we are at finding these bats,” said Kris Karsten.

Hale’s team analyzes DNA, weather patterns and mortality trends at the Wolf Ridge Wind Farm, all for one purpose.

“If we can predict when mortality happens, we can use that information to prevent it,” said Hale.

As our reliance on wind energy grows, a discovery like that may keep us from making things worse, while we’re trying to make them better.

 

THIS from USA TODAY: [click here to read at source] 

 
Bird deaths present problem at wind farms


Updated 9/22/2009 3:21 AM ET


For years, a huge wind farm in California's San Joaquin Valley was slaughtering thousands of birds, including golden eagles, red-tailed hawks and burrowing owls.

The raptors would get sliced up by the blades on the 5,400 turbines in Altamont Pass, or electrocuted by the wind farm's power lines. Scientists, wildlife agencies and turbine experts came together in an attempt to solve the problem. The result?

Protective measures put in place in an effort to reduce deaths by 50% failed. Deaths in fact soared for three of four bird species studied, said the Altamont Pass Wind Resource Area Bird Fatality Study.

The slaughter at Altamont Pass is being raised by avian scientists who say the drive among environmentalists to rapidly boost U.S. wind-farm power 20 times could lead to massive bird losses and even extinctions.

New wind projects "have the potential of killing a lot of migratory birds," said Michael Fry, director of conservation advocacy at the American Bird Conservancy in Washington.

Wind projects are being proposed for the Texas Gulf, the Atlantic Coast, the Great Plains and Upper Midwest. President Obama said in April that he would allow turbines along the Atlantic as one way to help meet a goal by environmentalists and the industry of generating 20% of the nation's electricity through wind by 2030. Currently about 1% of U.S. power comes from wind, according to the American Wind Energy Association.

"There's concern because of the scale of what we're talking about," said Shawn Smallwood, a Davis, Calif., ecologist and researcher. "Just the sheer numbers of turbines … we're going to be killing so many raptors until there are no more raptors."

Working on the problem

Interior Secretary Ken Salazar is aware of the problem and says the administration is working with energy companies and wildlife groups to help lessen the deaths.

"I think we will be able to minimize the number of birds being killed, just in terms of sheer numbers," Salazar said. "The fact that some birds will be killed is a reality."

Officials in the wind-energy industry say migratory birds and birds of prey, including eagles, are killed each year at some of the nation's biggest wind farms, but they say the concerns are overstated.

Laurie Jodziewicz, manager of siting policy for the American Wind Energy Association, said the industry has taken steps to reduce bird deaths.

"We have hundreds and hundreds of projects all over the country that are not having those impacts," she said, referring to Altamont.

Bird deaths cannot be completely eliminated, Jodziewicz said. "There will be some birds that are killed because they do collide with so many structures," Jodziewicz said.

Salazar said new technology in the design of turbines and more careful placement, such as outside of migratory paths and away from ridgelines, can reduce bird deaths.

Fry says other methods include using radar to detect and shut down turbines when migratory birds approach, building towers higher and with more space between them, and placing them away from areas where raptors hunt for small animals.

"Technology has evolved over the last several decades in significant ways," Salazar said. "We know how to do wind farms in ways that minimize and mitigate the effect on birds."

Non-wind utilities fined heavily

Some see a double standard for wind farms.

ExxonMobil pleaded guilty in federal court in August to the deaths of 85 birds at its operations in several states, according to the Department of Justice. The birds were protected by the Migratory Bird Treaty Act, and Exxon agreed to pay $600,000 in fines and fees. In July, the PacifiCorp utility of Oregon had to pay $10.5 million in fines, restitution and improvements to their equipment after 232 eagles were killed by running into power lines in Wyoming, according to the U.S. Fish and Wildlife Service.

That is far fewer than the estimated 10,000 birds (nearly all protected by the migratory bird law) that are being killed every year at Altamont, according to Robert Bryce, author of Gusher of Lies: The Dangerous Delusions of "Energy Independence." Bryce says that follows a decades-long double-standard where oil and gas companies face prosecution, but "politically popular" forms of energy get a pass.

Salazar said his department's Fish and Wildlife Service task force will recommend guidelines for wind farms that are friendlier to birds.

Bird advocates raise doubts about the impact, because the guidelines are voluntary.

"It's still entirely up to power companies where to place towers," said Gavin Shire, spokesman for the American Bird Conservancy.

 
 
 
 
 

Bats

We are grateful to the PSC for recognizing that the number of bat fatalities caused by the Glacier Hills wind turbines could be high.

Here's what the EIS has to say about bats:

Bat mortality has exceeded bird mortality at most wind farms where post-construction monitoring of both animal groups has been conducted.

Many species of bats are long-lived and have low reproductive rates.

Also, Bat Conservation International estimates that more than 50 percent of American bat species are in decline.

These characteristics make bat populations more vulnerable to the cumulative impacts that could occur as the number of wind projects continues to increase.

Seven species of bats are known to occur in Wisconsin; five of these are state species of special concern exhibiting some evidence of decline.

Very few bat studies have been conducted in Wisconsin and thus bat numbers and behavior are not well understood.

A pre-construction bat activity study was conducted in the Glacier Hills project area. The study, based on acoustic surveys, focused on bat activity patterns during the post-breeding and fall migration periods. No species identifications were performed during the study.

It is certain there will be some level of bat mortality if the proposed wind farm is constructed. However,due to the lack of research on bat mortality at wind farms in the Midwest, it is not possible to make predictions about the magnitude of bat mortality for this project or whether that mortality would have a significant impact on bat populations.

Post-construction mortality studies are being conducted at three recently completed wind projects in Wisconsin, including WEPCO’s Blue Sky Green Field (BSGF) project. These projects have land cover similar to that present within or adjacent to the Glacier Hills project boundary. In addition, the projected bat activity levels based on pre-construction surveys at BSGF are similar to the pre-construction estimates for the Glacier Hills project.

The initial post-construction data from the BSGF project show a high level of bat mortality.3 Thus, it is possible that bat mortality at Glacier Hills could also be high.

 The PSC is now taking comments on the Glacier Hills EIS. If you'd like to comment on page 24 of the EIS regarding the impact of 90 wind turbines on bird and bat poplulations in the Glacier Hills project area, CLICK HERE

 To review the entire docket for this project CLICK HERE and enter docket number 6630-CE-302.

To watch a short video about bats and wind turbines, click on the image below.

NOTE FROM THE BPWI RESEARCH NERD: Many residents of wind farms in our state have pointed out that studies have been done on the effect of wind turbines on birds and bats, but none have been done on the effect wind turbines have on the people who are forced to live with them.


 

 

 

12/9/08 What they say about the word "Assume" and what that has to do with industrial turbine noise and the state of Wisconsin's 1000 foot setback : Part Two of Our Step by Step Look at the History and the Content of Town of Union's Large Wind Ordinance.

A is for "assume"

near the town of byron, fond du lac county, wisconsin, fall, 2008

"[Industrial wind turbine] noise, on which the ordinance is silent,

was assumed to be captured by the 1000 foot setback"

--Alex DePillis

From the Minutes of the November 4, 1999 Guidelines and Model Ordinance Ad Hoc Subcommittee meeting.

At the time, DePillis was a state worker employed by the Wisconsin Energy Bureau, Department of Administration.

He now works as a wind developer for EcoEnergy LLC

What are the results of this "assumption" about the 1000 foot setback?

Gerry Meyer carried mail in his community for 30 years.

He lives inside the Invenergy Forward Energy wind farm near the town of Byron in Wisconsin's Fond du Lac County. When the turbines went on line near his home in March of 2008, he was surprised by the amount of noise that they made. He began keeping a noise log. (The entire turbine noise log can be downloaded by clicking here)

Let's look at the noise log for September 1, 2008

6:20 AM Loud motor running or humming sound.

7:05 AM I’m hearing turbine #4 in the barn, shop, and at the computer.

[ Turbine #4 is less than 1600 feet from the house]

11:15 AM Wind SW Loud.

4:15 PM Turbine 4 and 6 are making loud jet flying over sounds, ripping the sky apart. It has been loud all day.

9:40 PM This is the loudest night in a long time.

I hear #4, 6, 73, 74a, 3a and and possibly more.

I can hear them at the computer in the front of the house and in the family room in the back of the house with the TV on.

Keep in mind turbine 6 is ¾ mile away. # 73 is 2480’ and 74a 5/8 mile away.

It is very sad our town officials and PSC have allowed this turbine project to affect the health of residents in this area and it will continue in other areas.

11:40 PM I hear turbine jet flying over sound while watching TV in our family room.

This assumption about wind turbine noise made by Alex DePillis and other members of the Model Ordinance Ad Hoc Subcommitee helped the state create guidelines which allowed Chicago-based wind developer Invenergy to site turbines as close as 1000 feet from unwilling participants homes in Fond du Lac and Dodge County.

The result?

Residents in Dodge and Fond du Lac are having trouble sleeping at night due to noise from industrial turbines, and when they want to sell their homes, no one seems interested in buying them.

This photo, taken December 8, 2008 is of a home near the town of Byron that has been on the market for a long time. The price has been reduced but still no offers.

Can you guess why?

Why would the state put so many residents at risk by allowing a committee to set guidelines based on an assumption that a 1000 foot setback would take care of noise problems?

Local governments who recognized the inadequacy of the state's guidelines for siting turbines have created large wind ordinances intended to protect the health and safety of residents. Within the last year, six Wisconsin townships have adopted ordinances with a 2640 foot setback. They didn't just pull that figure out of the air. And they didn't base it on an assumption. So what is it based on?

Here's what we learned from the findings section from the Town of Union's large wind ordinance regarding wind turbine noise.

The complete text of the findings and all documents used to support these findings are cited in the ordinance. (Download the entire Town of Union ordinance by clicking here)

This is just a summary:

The state's current wind turbine noise limit of 50dBA does not adequately protect residents from the adverse health effects associated with large wind turbine noise.

The town of Union limits large wind turbine noise to a maximum of 35dBA or 5dBA over ambient, whichever is lower, in order to protect residents from adverse health effects associated with large wind turbine noise based on the following findings:

Large wind turbines are significant sources of noise, which , if improperly sited, can negatively impact the health of residents, particularly in areas of low ambient noise levels.

Large wind turbines emit two types of noise-- 1) Aerodynamic noise from the blades passing through the air, which can generate broadband noise, tonal noise and low frequency noise; and 2) Mechanical noise from the interaction of the turbine components.

A dBA scale is commonly used to measure audible wind turbine noise.

Low frequency noise from large wind turbines is not adequately measured by the state's use of dBA weighting.

Noise is an annoyance that can negatively impact health, producing negative effects such as sleep disturbance and deprivation, stress, anxiety, and fatigue.

Large wind turbines create a noise annoyance that can hinder physical and mental healing and can cause adverse health effects associated with sleep disturbance and deprivation, psychological distress, stress, anxiety, depression, headaches, fatigue, tinnitus and hypertension.

Wind turbine noise can affect each person differently. Some people are unaffected by wind turbine noise, while others may develop adverse health effects from the same noise.

At low frequencies, wind turbine noise may not be heard but rather is felt as a vibration. Medical research reported complaints from people who felt the noise from large wind turbines, similar to symptoms that can be associated with vibroacoustic disease.

The risk for adverse health effects resulting from noise annoyance such as headaches, stress, anxiety, fatigue, depression, pain and stiffness, and decreased cognitive ability associated with sleep deprivation from wind turbine noise increases with increasing A-weighted sound pressures. According to wind turbine noise studies, few respondents were disturbed in their sleep by wind turbine noise at less than 35dBA. Respondents were increasingly disturbed in their sleep by wind turbine noise greater than 35dBA.

Wind turbine noise greater than 5dBA over ambient increases the risk for health effects because a change of 5dB is clearly noticeable.

Studies show prolonged exposure to wind turbine noise resulted in adverse health effects at sound levels below those from other sources of community noise, such as road traffic noise. Sound generated by wind turbines has particular characteristics and creates a different type of noise having different health impacts than compared to urban, industrial or commercial noise.

Living in a rural environment in comparison with a suburban area increases the risk of residents being impacted by noise from nearby large wind turbines because of the low ambient noise in rural environments. The International Standards Organization recommends community noise limits for rural areas be set at 35dBA during the day, 30 dBA during the evening, and 25dBA at night.

Eye-witnesses living near newly-constructed large wind turbines in the Town of Byron, Fond du Lac County, WI, testified at the public hearing held by the Town of Union Plan Commission that they currently experience adverse health effects from the wind turbine noise such as sleep deprivation and disturbance, headaches, nausea and dizziness. Th noise from the wind turbines in the Town of Byron is greater than 45dBA at their residences and can be heard inside of their houses and outside in their yards.

Two Plan Commissioners from the Town of Union visited the newly constructed wind turbines in the Town of Byron, Fond du Lac County, WI in June 2008 and confirmed the wind turbines were a significant source of noise. One described the quality and intensity of the noise as sounding like a jet airplane. The other spoke with residents, farmers and a sheriff's deputy in the area who all stated that the turbines were noisy. He also took sound measurements from the home of a resident with a turbine less than 1500 feet from his home. The sound measured between 57 to 67 dBA on June 6-7, 2008.

However, experiences vary. Two other plan commissioners visited wind turbine sites. One visited sites in Byron Township, Lincoln Township and Montfort and found that overall, people were satisfied with the turbines. Two issues noted by this Plan commissioner were tensions between landowners profiting from the wind turbines and those landowners who did not, and poor conditions of roads following the installation of the turbines.

The other commissioner visited wind farms in Iowa. He estimated that approximately 60% of the people he spoke with had positive opinions of the wind turbines and approximately 40% of the people he spoke with had negative opinions of wind turbines.

A fifth plan commission member went to a wind farm south of Rockford, IL. No one was available to talk so he walked around the area. It was a nice day, and windy. He noticed that the windows in the homes surrounding the site were all closed and no one was outside. He stated the noise was similar to a plane going overhead. He stood under a tower and did not feel any unease.

(For the complete text of the Town of Union's findings regarding Wind Turbine Noise Impacts, please download the complete ordinance by clicking here)

1/10/08 Who Ya Gonna Call?

telegram.jpgWhen something goes wrong with a 40 story turbine near your house......

Who do you call?

How quick do they come?

How long do you have to wait? 

 

Here's what residents are finding out in Pennsylvania. Click here to read the original source of this article.

 Despite efforts to repair wind turbines in Juniata Township, Blair County, they still are generating unbearable noise to some residents.

Tempers flared at a Juniata Township supervisors meeting Monday night as residents voiced their frustrations.

Supervisors agreed to contract Paul Heishman, a professional engineer, to conduct an independent noise study by Jan. 30, when all repairs are expected to be complete.

Babcock and Brown, owners and operators of the turbines in the township and neighboring municipalities, have repaired half of the turbines and will repair the rest by Jan. 30.

‘‘There was some tape that was put on the trailing edge of the turbine blades. That tape was peeling off and causing a noise,” said Matt Dallas, public relations officer for Babcock and Brown. “Ironically, I think the tape is put on to make them quieter. They either used the wrong kind of glue or not enough was used, which is causing the noise.”

Gamesa built the turbines two years ago; in June, Babcock and Brown bought the wind farm that has four turbines in Juniata and several others in Greenfield and Portage townships.

The problem has not been fixed, said Jill and Todd Stull, who live near the turbines.

‘‘You know when you’re standing outside and you hear a plane coming about 30,000 feet overhead, then it goes off in the distance? It sounds like those planes are 5,000 feet above your house and circling and never land,” Jill Stull said.

‘‘It sounds like a jet. I know it’s going to make some noise, but a lot of times, it sounds like a jet,” resident Myrle Baum said.

According to a study conducted in December by Epsilon Associates, a company contracted by Babcock and Brown, the noise level of the repaired turbines was below the township ordinance noise level of 45 decibels.

However, Jill Stull said she borrowed a noise meter from Penn State University, which reads above 45 decibels on windy or cloudy days.

‘‘You got us a bad study. The information is garbled. It’s dishonest. We might as well put it in here,” resident Brian Baum said, pointing to the bathroom.

Once repairs on all the turbines are complete, Dallas said the noise problem should be fixed.

‘‘We really want to fix this and be a good neighbor. We’re in this for the long haul,” he said.

The Stulls said they could move, but they aren’t going to.

‘‘We’re not going anywhere. I just want them to be quiet. I’m not going to jump on the ‘I hate windmills’ bandwagon because I don’t,” Jill Stull said. ‘‘I’m just tired of nobody listening. My point is what is your peace of mind worth? I can’t play outside with my kids back at the pond in the woods because it gives me a headache.”

Sixteen more wind turbines are being built in Juniata Township as part of phase two of the Allegheny Ridge Wind Farm.

Dallas said the company has 20 other wind farms across the country and has not had a noise issue elsewhere.

By Kristy MacKaben, For the Mirror

Altoona Mirror

 

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