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Teton Dam

Teton Dam. The Collapse and Disaster. Names TE 335. 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

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Teton Dam

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  1. Teton Dam The Collapse and Disaster. Names TE 335

  2. 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

  3. 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.

  4. 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

  5. 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.

  6. http://washington-state-magazine.wsu.edu/stories/2004/August/tetondam.htmlhttp://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

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