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Rollback at Devil's Head, Wisconsin


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#1 Peter

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Posted 18 December 2009 - 07:38 AM

MANY INJURED IN LIFT ACCIDENT AT DEVIL'S HEAD
SAM Magazine--December 18, 2009--More than a dozen people were injured in a lift malfunction at Devil's Head Resort, Wisc., three of them seriously. According to published reports, the Hall double stopped and then started to roll back last night at about 7 p.m. Witnesses described the rollback as very quick. Many people jumped from the lift while others were slammed into the bottom terminal, where most of the injuries occurred.

We will update this story as more information comes in.

http://www.wkowtv.co....asp?S=11697187
http://www.nbc15.com...s/79583412.html


Devil's Head operates 6 Hall doubles, all built in 1971 and 1972, as well as a 1978 Hall quad, 2 Riblet quads (1998 and 1990), and a 1975 Hall triple.

From the pictures of the incident, this appears to be lift #3. The below pictures are photos of this lift.

Attached File(s)


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#2 Kelly

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Posted 18 December 2009 - 08:59 AM

Industry members please post relevant information in SORT forums –
Thanks
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#3 skisox34

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Posted 18 December 2009 - 09:37 AM

Wow that is pretty crazy it sounds like the brake made it come to stop eventually so it wasn't like the winter park rollback. Still sounds pretty serious.

#4 Peter

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Posted 18 December 2009 - 02:58 PM

SAM Magazine—Merrimac, Wisc., Dec. 18, 2009—At least 14 people were injured in a lift malfunction at Devil's Head Resort, Wisc., three of them seriously though not critically, after a lift rollback incident.

The lift, a 1970s Hall double, was full when it stopped and then started to roll back last night at about 7 p.m. All three brake systems failed, and 10 to 15 chairs rolled back through the terminal. Several deroped as they swung wildly around the bullwheel, some catching on the terminal skirting, which was also damaged. The haul rope itself deroped at the first tower above the terminal.

The lift was fully evacuated by 9 p.m. All of those admitted to the two area hospitals were released by Friday morning.

Witnesses described the rollback as very quick. Many people jumped from the lift while others were slammed into the bottom terminal, where most of the injuries occurred. Witnesses said that sparks were flying and they smelled smoke at the terminal. One described a “loud bang” and the smell of “burned rubber.” The State Department of Commerce has taken charge of the investigation, but cause of the accident has not been determined.

The lift had been inspected as recently as last month by The Richardson Group, which had done annual inspections since 2007. The state last inspected the lift in 2006.
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#5 Lift Kid

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Posted 18 December 2009 - 03:13 PM

Just received an email regarding this accident from our Patrol Director. Interesting that all three braking systems failed. I wonder what may have caused this to happen. I'm interested to hear the what the investigation reveals.

#6 iceberg210

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Posted 18 December 2009 - 03:27 PM

Glad to hear that no one was killed, and wishing the speediest of recoveries by those that were injured.

Wondering on the topic of the accident what sort of device did the Hall's have for antirollback protection?

Also are there any other cases of all three safety nets not performing? Seems odd that all three systems would fail. Hopefully they can figure out the issue fast and prevent this sort of thing from happening again.
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#7 71CJ5

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Posted 18 December 2009 - 06:31 PM

Do the gearboxes that Hall used not have high speed backstops?

#8 Andoman

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Posted 18 December 2009 - 07:29 PM

I hope for speedy recovery for those that were injured. This incident has to have worried most of the midwest ski areas since there are an awful lot of Halls still in service here. I'll have to watch for the incident report when it's issued.

#9 Peter

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Posted 18 December 2009 - 08:59 PM

Witnesses recall chaotic scene after Devil's Head ski lift accident in Wisconsin
'I've never heard screaming like that'

By John Keilman and Kevin Murphy Chicago Tribune

December 19, 2009


MERRIMAC - , Wis. -- Michael Krisher had almost reached the top of a hill at the Devil's Head ski resort when the chair lift he was riding stopped.

He wasn't concerned. Lifts stopped all the time when someone lost a ski or stumbled getting off. But after a moment the chair started to go backward -- slowly at first, then faster and faster.

"As we were going down the hill, you could just hear people screaming at the bottom," Krisher said. "I've never heard screaming like that except in the movies."

For reasons Wisconsin officials are still trying to discern, a nearly 40-year-old lift at the resort began running backward Thursday night at an out-of-control rate of speed, overriding several safety brakes that should have stopped it.

Authorities said 14 people were hurt, though by Friday almost all had been released from area hospitals. Some had leaped from their chairs as they tried to avoid the pileup at the bottom.

Krisher, 27, of Sun Prairie, decided to stay with his chair. It eventually slowed and stopped just before the bottom of the hill. He had been speeding backward for about 45 seconds, he estimated.

Skiers said the lift, which has a capacity of up to 70 people, was fully loaded when it malfunctioned at about 7 p.m.

Skiers and snowboarders were stunned at the bizarre mishap that plunged a night of half-price skiing into chaos at the resort, about 40 miles northwest of Madison.

"I've been riding there since I was a kid, 15 or 20 years, and nothing like this has happened before," said Madison resident Josh Strandlie, 25, who witnessed the accident.

Arlington Heights snowboarders Chris Ambler and Mike daPonte were close to the top when their chair began to go backward. Ambler, 21, said the change of momentum nearly sent them tumbling, since the chair did not have a safety bar in front.

"Then I heard some metal clanking and saw chairs flying around sideways at the top (of the lift)," Ambler said "A few kids in a chair behind us started yelling, 'Jump! Jump!' "

Those who reached the bottom were being flung from their chairs, Ambler said, so he and daPonte leaped about 20 feet to the ground, their snowboards still strapped to their feet. Neither man was hurt.

Joe Vittengl, the general manager of Devil's Head, said an emergency brake deployed automatically to stop the chairs, and an operator also pushed a button that stopped the lift.

He said the accident's cause was still undetermined, though a drive system appeared to have failed. The lift passed an inspection last month, he said.

The resort opened Friday, though officials with the Wisconsin Department of Commerce were still poring over the malfunctioning machine.

Nearby hospitals took in 14 people from the resort. The people received mostly minor head, neck and back injuries, though Ken Carlson, spokesman for Sauk Prairie Memorial Hospital in Prairie du Sac, said one person suffered a lower extremity fracture.

By late Friday, only one person who had been in the accident was still hospitalized. Kevin Grohskopf, spokesman for St. Clare Hospital in Baraboo, said that person's injuries were not life-threatening.

John Keilman is a Tribune reporter; Kevin Murphy is a freelance reporter.
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#10 LiftTech

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Posted 19 December 2009 - 09:47 AM

View Post71CJ5, on 18 December 2009 - 06:31 PM, said:

Do the gearboxes that Hall used not have high speed backstops?


You are correct, at least none that I have seen, bullwheel back stops (two of them), service brake and bullwheel brake.

#11 Lift Dinosaur

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Posted 19 December 2009 - 05:39 PM

View Post71CJ5, on 18 December 2009 - 06:31 PM, said:

Do the gearboxes that Hall used not have high speed backstops?


Many of the early models of gear reducers did not have internal rollback devices. While I am not familiar with the drive train arrangement used by Hall Lifts, many manufacturers used a "high speed backstop" which acted on the shaft that connected the electric motor to the gear reducer. Link Belt and Formsprague are two high speed rollback devices I am familiar with.

Dino
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#12 Lift Kid

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Posted 19 December 2009 - 09:21 PM

http://www.saminfo.c...le.php?tid=4363

DEVIL’S HEAD RESORT, STATE INSPECTORS INVESTIGATING ACCIDENT
December 18, 2009

SAM Magazine—Merrimac, Wisc., Dec. 18, 2009—A team of investigators including state inspectors, tramway experts and staff members of the Devil’s Head resort are conducting an investigation into what led to the lift rollback accident at the resort on Thursday evening.



Resort general manager Joe Vittengl said that the resort’s entire staff was deeply concerned for the resort guests who were injured in the incident. “We’re contacting them and offering any assistance we can,” Vittengl said. Most of the injuries were minor; one person remains under observation in an area hospital.

Vittengl said that the lift on which the incident occurred was run by a veteran operator. The lift had been inspected by an independent tramway engineer, per state regulations, on Nov. 5, prior to the start of the ski season. It was given clearance to operate. Vittengl also said that the lift’s safety systems are routinely checked, even more frequently than industry standards require. Chairlifts of the type involved in the incident have four independent mechanisms to stop the lift in the event of an incident.

Even though all of Devil’s Head’s lifts were inspected before the start of the ski season, the resort will inspect all lifts again immediately. “We want our guests to have fun,” Vittengl said. “But more importantly, we want them to be safe. It’s our top priority.”

The lift that experienced the rollback incident will remain out of service until the investigation is completed and repairs can be made. Other lifts at Devil’s Head continue to operate on their normal schedule.

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#13 dh_lift_op

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Posted 20 December 2009 - 12:07 AM

Everyone is lucky that this wasn't worse. I'm sure most of us can see what the outcome could have been. Last I heard, the worst injury was a broken leg, I'm not sure if it was from someone who jumped or rode it out. Quite a scary thought when you think about riding 45 seconds and in reverse... I am curious to find out if this was caused by neglect or a true accident. The state requested the report and I'm sure we will find out soon.

I did overhear a few Ski Patrols saying that whoever was yelling "jump" should be shot. They believed that it would have been safer to ride it out. I personally would have leaped off at the last possible second before entering the terminal where I was close to the ground.

I saw a news segment on a Madison tv channel, and they had a spokesperson, who I do not remember, he said that this was the first one since the 1960's (I'm sure he wasn't including the WP Eskimo lift). Is this true?

This post has been edited by dh_lift_op: 20 December 2009 - 12:17 AM


#14 Peter

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Posted 20 December 2009 - 10:24 AM

The Dinosaur rollback at Snoqualmie Pass, WA was in the mid 1970's.
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#15 monkey

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Posted 21 December 2009 - 05:51 PM

Inspect your drop dogs.

#16 shoemanII

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Posted 22 December 2009 - 06:04 PM

various musings from afar:
1.) passengers describe the lift going backward "faster and faster", and seeing chairs "flying around sideways at the top". "people were heard screaming", "those passengers that reached the bottom were flung from chairs".

and ski patrol opines that it was safer in the chair? their ignorance of the dynamics involved in a rollback is very impressive.

let's see: 35 loaded chairs x 2 passengers each x 170lbs/passenger = 5.95T of folks freewheeling backwards down the hill.

2.) the general manager's "spin" on the accident and misdirection of responsiblilty are typical, expected and usual in these situations. makes me ill.

3.) "Inspect your drop dogs."

yes, please do so, every f*cking day. forever.

#17 hyak.net

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Posted 23 December 2009 - 10:37 AM

Sure sounds familiar when you read this article.... 1971-Dino

http://hyak.net/articles/12_71.html

#18 liftmech

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Posted 24 December 2009 - 02:27 PM

The Hyak incident was operator error; he had forgotten to reengage the high-speed backstop after stopping the lift from its reverse operation. As soon as he pressed start again (releasing the service brake), the almost fully-loaded lift overhauled in the reverse direction. Still no word on this latest incident though.
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#19 dh_lift_op

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Posted 24 December 2009 - 08:43 PM

News says it was a brake failure, but the report explaining why it failed has not been released yet.

#20 skisox34

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Posted 31 December 2009 - 07:03 AM

To anybody who may be a a lifty this year, maybe a first year. Inspect everything you are supposed to and take your job seriously. I have already seen far too many half-assing it and I'm not saying that that is what happened here. But think of the people who's lives are in you hands. I used to take the number of carriers and divide my two and multiply by the number of people in each carrier and I knew that many people were counting on me for their safety. Ya it sucks sometimes it's cold and all the guests complain to you about things you have no control over. But their safety rests in your hands especially if you are a drive operator.

*departs the soap box*

And yes inspect your drop dogs!





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