applications of the nws fldwav model. teton dam failure on snake river
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Teton Dam FailureTeton Dam FailureSpecificationsSpecifications
Dam Height: 300 ftCrest Length: 3,000 ftStorage behind dam: 250,000 acre-ftDam crest width: 35 ftSlope of upstream dam face: 1:2Slope of downstream dam face: 1:2.5
Failure occurred June 6, 197611 people killed25,000 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 : 0.5Reservoir depleted in 5 hrs
Outflow Hydrograph and Flooded AreaOutflow Hydrograph and Flooded AreaDownstream of Teton DamDownstream of Teton Dam
0 1 2 3 4 5 6
TIME (HR)
0
500
1000
1500
2000
2500
Th
ou
san
ds
DIS
CH
AR
GE
(C
FS
)
Lower Mississippi RiverLower 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)
MORGANZADIVERSION
MIS
SIS
SIP
PI
GAGING STATION ANDCOMPUTATIONAL NODE
COMPUTATIONAL NODE
LATERAL INFLOW OROUTFLOW
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