Teton Dam The Collapse and Disaster. Names TE 335.
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Teton Dam
The Collapse and Disaster. Names
TE 335
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– Located in 3miles northwest of Newdale, Idaho
• Building began in Feb 1972 and was completed in Nov. 1975• 305-foot-high• Legnth of 3100 ft including spillway• Crest elevation of 5332ft• Total impoundment capacity 288250 acre-feet, active capacit of
200k acre feet (Karl Terzaghi) (Arthur Casagrande)• 11 lives lost• 100 Million dollar to build• 300 Million Dollars of claims
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• Water began seeping from canyon wall about 750 feet down stream from the dam on Thursday.
• By early Saturday, June 5th 1976, a new leak had appeared near the abutment.
• By 9:30 a.m. this leak had begun. Four bulldozers were sent in to try and plug the leak. It continued to grow. At
• area residents were already calling and going door to door warning families who lived just below the dam to get out fast.
• Around 11:00 a.m. a whirlpool was spotted in the water above the dam. hole on the downstream side had grown to more than 25 feet in diameter.
• Bulldozers got stuck. and were swallowed by the hole. The operators were pulled free with ropes that had been tied around their waists.
• By evening, the reservoir had drained completely.
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• Cause of Failire
• -Dam fill inadequately campacted, too dry. (brittle)
• - Fracturd bedrock abundments (less support)
• -Excessive reliance on grout barrier
• -Piping: Erosion of tunnels by leaking water
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• Possible Solutions:• Use less brittle material. More pressure
flexibility.• Secure abuntments.• Don’t rely on grout connections and barriers.• Better placement of pipes for less or no erosion. • Take to account the “pre-breakage” leaks that
might lead to dam eruption.• Better evacuation efforts.
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• http://washington-state-magazine.wsu.edu/stories/2004/August/tetondam.html
• http://web.umr.edu/~rogersda/teton_dam/
• http://www.geol.ucsb.edu/faculty/sylvester/Teton%20Dam/welcome_dam.html
• http://www.eng.uab.edu/cee/faculty/ndelatte/case_studies_project/Teton%20Dam.htm
• http://www.rootsweb.com/~idfremon/flood.htm