4 January 2015 Last updated at 10:51 GMT
People living near the area reported hearing loud banging noises coming from the Screggagh wind farm for around two days.
Debris from the turbine has been scattered over hundreds of metres but no one has been hurt.
It's not clear what caused the collapse but bad weather isn't thought to be a factor, as there were no storms or high winds at the time.
The company who operate the wind farm are now investigating.
Turbine 3 was one of eight turbines on the wind farm and is worth more than half a million pounds.

The whales were spotted along a stretch of beach on Monday evening.
Locals together with teachers and students of a local college tried to float the whales back out to sea, but they kept returning to the shore.
The last time such an incident occurred in Tuticorin, was in 1973 when 147 whales died.
"At least 45 whales are dead and about 36 others which were rescued and pushed back into the sea are still in the vicinity of the shore,'' Dr Patterson Edward, director of the Tuticorin-based Sugandhi Devadasan Marine Research Institute, told BBC Hindi's Imran Qureshi.
Whale expert  Kumaran Sathasivam said it is "very difficult" to rescue stranded whales because they all need to be pushed into the sea at the same time.
"Otherwise, they will return to be with the whale that is in distress. The whales emanate a sound that is not audible to human beings and that makes them return to the shore," he said.
"Also, because of their weight they are not able to get back into the water and their bodies gets overheated, and they die on the shore. You need to constantly pour water on them because their bodies are covered in a layer of fat."
He said it was hard to know if the whales that had been pushed back would survive because there was a strong possibility that they would be too exhausted to swim out to sea.

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Walker was unexpectedly joined by Maria de Cezar while presenting live on BBC Four from Copacabana beach, and after she joined him for an impromptu on-air chat to discuss her wedding, she has invited him to next month's ceremony.
It comes hot on the heels of FOUR marriage proposals at the Rio Games, meaning Maria's is not the only 'Olympic wedding' on the horizon.
Romance was in the air at the individual dressage on Monday, as Briton Charlotte Dujardin not only retained her title but received a proposal - of sorts - from fiance Dean Golding.
Watching Dujardin from the stands, he wore a sign that read: "Can we get married now?"
After winning gold, Dujardin told BBC Radio 5 live: "He's already asked me. He knows it's 'yes'.
"I'm hopefully going to get married next year. I said I would get married after London but time just flew by. It's definitely on the cards now."
Cupid then found British race walker Tom Bosworth at the Copacabana.
The 26-year-old almost pulled off a shock when he led the 20km walk at the halfway stage, before finishing sixth. On Monday, he surprised boyfriend Harry Dineley with a marriage proposal.
Bosworth's was the third proposal of the Rio Games.
On Sunday, Chinese diver He Zi had just been awarded her women's 3m springboard silver when boyfriend and fellow diver Qin Kai proposed in front of a stunned arena.
She nodded.
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The first proposal of the Games came during the first week, when Olympic rugby sevens venue worker Marjorie Enya asked Brazil player Isadora Cerullo to marry her.
"The Olympic Games can look like closure but, for me, it's starting a new life with someone," said Enya. "I wanted to show people that love wins."
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An 80-metre tall wind turbine has collapsed on a mountainside in County Tyrone, Northern Ireland.
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At least 45 whales have died in the southern Indian state of Tamil Nadu after more than 80 of the animals were stranded on the shore at Tuticorin.
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BBC presenter Dan Walker has been invited to the wedding of the woman whose hen do gatecrashed his live Olympics broadcast.