Teton Dam Failure Specifications Dam Height: 300 ft Crest Length: 3,000 ft Storage behind dam: 250,000 acre-ft Dam crest width: 35 ft Slope of upstream dam face: 1:2 Slope of downstream dam face: 1:2.5 Failure occurred June 6, 1976 11 people killed 25,000 people homeless $400M damage Peak Outflow: 1.6 – 2.8 million cfs (2.3M best estimate) Breach shape – trapezoid. Max width 500 ft; side slope 1 : 0.5 Reservoir depleted in 5 hrs
Outflow Hydrograph and Flooded Area Downstream of Teton Dam
Lower Mississippi River BONNET CARRE DIVERSION RED RIVER LDG (MI 302.4) BATON ROUGE DONALDSONVILLE RESERVE NEW ORLEANS CHALMETTE PT A LA HACHE VENICE (MI 10.7) MORGANZA DIVERSION MISSISSIPPI GAGING STATION AND COMPUTATIONAL NODE LATERAL INFLOW OR OUTFLOW
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