WALNUT GROVE - AZ00000-103
Dam Name: WALNUT GROVE
State: AZ
Downstream Hazard Potential: H
Incident Type: Failure
Incident Date: 01/01/1890
Incident Driver: Unknown
Incident Mechanism 1: Spillway Deficiency
Incident Mechanism 2
Incident Mechanism 3
Incident IDAZ00000-103
Incident Description
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or UpdatesDestroyed town of Seymour (pop: <10); huge economic losses in Wickenburg; washed out new 25-high diversion dam 12 miles downstream. Inadequate spillway that was able to pass only about 4% of the flood flow at the time of failure; spillway terminated a. Jim Liggett, Cornell University http://roadrunnergold.com/PDF_Files/2006%20Newsletters/2006July-a_web.pdf
Fatalities: - Unknown; most likely +/- 70, although published estimates range from 10-150
Fatalities: - Unknown; most likely +/- 70, although published estimates range from 10-150
Owner Type
Dam TypeER
Primary Purpose(s)
EAP
Dam Height110 ft
Max Storage (ac-ft)
Surface Area (acres)0.00
Year Completed
NID NumberAZ00000
River NameHASSAYAMPA
Latitude0
Longitude0
Year Modified
Regulatory Agency(ies)
Incident Time
Incident Duration
Incident Report Produced
Information Sources
