Teton Dam The Collapse and Disaster Names TE

– Located in 3 miles northwest of Newdale, Idaho • • • Building began

• Water began seeping from canyon wall about 750 feet down stream from

• Cause of Failire • -Dam fill inadequately campacted, too dry. (brittle) •

• Possible Solutions: • • • Use less brittle material. More pressure flexibility.

• http: //washington-statemagazine. wsu. edu/stories/2004/August/tetondam. html • http: //web. umr. edu/~rogersda/teton_dam/ • http:

Slides: 18

Download presentation

Teton Dam The Collapse and Disaster. Names TE 335

– Located in 3 miles 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 5332 ft Total impoundment capacity 288250 acre-feet, active capacit of 200 k acre feet (Karl Terzaghi) (Arthur Casagrande) • 11 lives lost • 100 Million dollar to build • 300 Million Dollars of claims

• Water began seeping from canyon wall about 750 feet down stream from the dam on Thursday. • By early Saturday, June 5 th 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.

• 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

• 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.

• http: //washington-statemagazine. wsu. edu/stories/2004/August/tetondam. html • http: //web. umr. edu/~rogersda/teton_dam/ • http: //www. geol. ucsb. edu/faculty/sylvester/Teton%20 Dam/welcome_ dam. html • http: //www. eng. uab. edu/cee/faculty/ndelatte/case_studies_project/T eton%20 Dam. htm • http: //www. rootsweb. com/~idfremon/flood. htm