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Old 04-22-2014, 07:51 AM   #91
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This post is specifically for Junkman. He was wondering about safety and about the sinkhole/what caused it/ will it happen again etc. This is what the NCM is doing to monitor the situation going forward. I had to stand on a stool for this to not go over my head. To early in the morning.

On February 12, 2014, a catastrophic sinkhole opened up at the National Corvette Museum (NCM) and swallowed in it eight rare Corvettes. Since then, a diverse team of professionals has been working together with the NCM, led by Scott, Murphy, & Daniel, LLC Construction, to assess and remediate the collapse. As part of this effort, Western Kentucky University (WKU) and project partners are collecting data to research the various environmental factors contributing to the cause and evolution of the sinkhole, as well as monitoring the area during the remediation. These types of collapse features are common in karst regions, like south-central Kentucky, where water flows underground and forms caves and voids as it dissolves away the bedrock.

Since water flowing underground is part of the process of sinkhole development over geologic time, and often difficult to research since it exists underground, a method to monitor stormwater and groundwater in karst regions that can capture high-resolution data about water movement is necessary. Recently, YSI, Incorporated designed a new, submersible water monitoring sonde, the EXO II, which is capable of capturing and logging high-resolution (every 10 minutes in this case), continuous data for several parameters, including water depth, pH, temperature, specific conductivity, turbidity, dissolved oxygen, and others. This logger provides everything from Bluetooth accessibility to real-time monitoring capabilities with additional peripheral devices that are available, and can be used in wells, streams, or any other water monitoring location.

Through a partnership between WKU’s Center for Water Resource Studies (WKU CWRS), Fondriest Environmental, YSI Incorporated, the City of Bowling Green Public Works Department, and the National Corvette Museum, one of these EXO II sondes outfitted with multiple water parameter probes was loaned to WKU CWRS for use at the NCM sinkhole site. The sonde is being used to monitor water in an adjacent pond area that serves to collect runoff and exists as a perched water feature, which can provide information as work continues of any changes in the water from the drilling process and storms that could pose a threat to the remediation process. This monitoring provides an additional measure of safety and data collection to help understand the dynamics of the sinkhole and its natural formation processes.

The data collected through this monitoring project will support efforts by K&S Engineering, Hayward Baker Incorporated, EnSafe, Scott, Murphy & Daniel, LLC, DDS Engineering, and other project partners in their collective work to remediate the sinkhole. It will simultaneously provide invaluable scientific information to WKU CWRS’s research on sinkhole processes and karst landscape evolution.

Dr. Jason Polk (Director, WKU CWRS) and his graduate student, Dan Nedvidek, are using these sondes in other locations in the City and elsewhere to monitor stormwater runoff and measure water quality and other parameters related to karst hydrology. Collectively, these data provide a new, advanced method by which the study of karst processes and hydrogeology can be studied to inform our understanding of groundwater and associated karst features, like sinkholes. Dr. Polk said, “Partnerships like this one with Fondriest and YSI are the essence of collaborative scientific research, and allow us the capabilities to collect data and quickly put together information to inform how to move forward in situations like this one. It’s a great benefit to be able to use new, advanced equipment that will lead the way for future research in this field and others.”

Special thanks to Paul Nieberding (Fondriest Environmental) and Brandon Smith (YSI, Incorporated) for their assistance in making this project possible.
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Old 04-22-2014, 09:16 AM   #92
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I still don't trust it. I fear anything that I can't punch. Bees, horse flies and sink holes are on my stay away from list.
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Old 08-30-2014, 09:01 AM   #93
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Here is the final decision on which cars get restored and what the Corvette Museum decided to do with the sinkhole. There is some sadness in this decision because some cars are lost.

Museum Board Finalizes Decision on Sinkhole, Great 8 Corvettes

The National Corvette Museum Board of Directors held their quarterly meeting and finalized plans for repair of the Museum’s Skydome building, and the eight Corvettes affected by the February 12, 2014 sinkhole collapse.

After careful review of additional information and revised plans with price quotes from the construction company, the board voted to completely fill in the sinkhole.

“We really wanted to preserve a portion of the hole so that guests for years to come could see a little bit of what it was like, but after receiving more detailed pricing, the cost outweighs the benefit,” said Museum Executive Director Wendell Strode. “At the June board meeting, the information available at that time indicated a cost of around $500,000 more to keep the hole, but after incorporating additional safety features and vapor barriers for humidity control, the price tag rose to $1 million more than the cost to put the Skydome back how it was.”

Keeping even a portion of the sinkhole would require 35 foot retaining walls to be built inside of the sinkhole, additional micro piling, visible steel beams running through the hole, and soil nailing. All of these additional structural features are to ensure the safety of the sinkhole and prevent cracking and breaking of the sides in the future, which could result in stability issues, but take away from the natural look of the original sinkhole. The board also considered future maintenance issues that could arise if the hole was kept and the possibility that the hole wouldn’t look like a naturally occurring sinkhole any longer.

“The interest in our new attraction has been phenomenal so we do plan to leave it ‘as-is’ through our Vets ‘n Vettes event November 6-8, 2014, after which time we will begin the process of remediating and filling the hole,” Strode added.

Chevrolet and the National Corvette Museum will restore three of the Corvettes that were damaged when they were swallowed up by the sinkhole.

Chevrolet will restore the 2009 Corvette ZR1 prototype, known as the Blue Devil, and the 1-millionth Corvette produced – a white 1992 convertible. The GM Heritage Center will oversee this process. In addition, the restoration of the 1962 Corvette will be funded by Chevrolet, but will be handled by the National Corvette Museum. A restoration shop has not yet been determined. The remaining five cars were determined to be too badly damaged to warrant restoration. They will remain in their as-recovered state to preserve the historical significance of the cars and what happened on February 12, 2014. They will become part of a future display at the Museum.

In total, General Motors will provide nearly $250,000 in support to help the Museum recover from the sinkhole. The National Corvette Museum celebrates its 20th anniversary this weekend as it welcomes the Corvette enthusiasts nationwide who have helped expand and support the non-profit Museum.

“Our goal was to help the National Corvette Museum recover from a terrible natural disaster by restoring all eight cars,” said Mark Reuss, GM Executive Vice President, Global Product Development. “However, as the cars were recovered, it became clear that restoration would be impractical because so little was left to repair. And, frankly, there is some historical value in leaving those cars to be viewed as they are.”

It’s a sentiment echoed by Corvette enthusiasts from around the globe.

“There has been an outpouring of messages from enthusiasts the world over, asking us not to restore all of the cars,” said Wendell Strode, executive director for the National Corvette Museum. “For Corvette enthusiasts, the damage to the cars is part of their history, and part narrative of the National Corvette Museum. Restoring them all would negate the significance of what happened.”
Timelines for the start and projected completion dates for the three Corvettes’ restorations have not been established. They will be announced later.

Sinkhole summary
On Wednesday, Feb. 12, 2014, at 5:44 a.m., National Corvette Museum (NCM) personnel received a notification from their security company about motion detectors going off in the Skydome area of the museum. When those personnel arrived on site, a sinkhole was discovered, eventually measuring about 45 feet wide, 60 feet long and up to 30 feet deep.

Security camera footage showing the Skydome floor’s collapse has been viewed nearly 8.3 million times on YouTube.

The sinkhole swallowed eight historic Corvettes – two on loan from GM and six owned by the museum:
1993 ZR-1 Spyder (on loan)
2009 ZR1 “Blue Devil” prototype (on loan)
1962 Corvette
1984 PPG Pace Car
1992 1-millionth Corvette
1993 40th Anniversary Corvette
2001 “Mallett Hammer” Z06
2009 1.5-millionth Corvette.

On March 3, the 2009 Blue Devil was the first car recovered and despite significant damage was started and driven out of the Skydome. The 1.5-millionth Corvette and Mallett Corvette were the last cars pulled from the sinkhole, on April 3 and April 9, respectively – after workers were initially unable to find them amid the collapsed earth.

All eight cars were placed in a special display, fueling a nearly 70-percent jump in museum visitor traffic in the months after the sinkhole appeared.

Construction is expected to take approximately 6 months to complete. The Museum will remain open during the process, and the work in the Skydome will be viewable via a Plexiglas wall.
The Museum plans to create a meaningful sinkhole exhibit within the Skydome, featuring the cars involved, 3D interactive images of the sinkhole, videos, photos and more.

The Museum is located at I-65, exit 28 in Bowling Green, KY - just one hour north of Nashville, TN and less than two hours south of Louisville, KY. Open daily, 8am-5pm CT, admission to the Museum is $10 for adults, $8 for seniors age 65 and over, $5 for kids age 6-16 and children age 5 and under are free. Access to view the sinkhole is included with regular admission. Guests who enter the Skydome to view the sinkhole must be age 8 or older. For more information on the Museum, visit their website at or call 800-538-3883.
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Old 08-30-2014, 10:09 AM   #94
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I feel that, overall, they made the correct decision. While it certainly won't please everyone, that was never going to happen anyway no matter what decision was reached. The Board's primary concern had to be the long-term financial well being of the NCM, while weighing the historical significance of the sinkhole event. I think that a display of some of the more badly damaged cars commemorates the event and demonstrates the power and destructive force it wielded, while restoring the cars that can be realistically restored fulfills the museum's desire to return to normalcy and maintain the integrity of the collection as much as is practical. The building itself must take precedence in any future plans as well, and the safety and stability of the main structure are paramount. A "display sinkhole" never made a lot of sense to me, and the description of what such a display would end up looking like only confirms my beliefs.

So, good job by the NCM Board, and let's move forward.
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