DAM NE06722 - NE06722-3033
Dam Name: DAM NE06722
State: NE
Downstream Hazard Potential: L
Incident Type: Failure
Incident Date: 05/07/2015
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Overtopping
Incident Mechanism 2
Incident Mechanism 3
Incident IDNE06722-3033
Incident DescriptionDam was overtopped and failed following 10-inch plus rain in less than 12 hours. Dam was an unapproved structure. It appears the dam was constructed without any engineering analysis.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure ImpactsBridges
Economic Damages (in $)
Response
Volume released at failure (ac-ft)175
Additional Remarks or UpdatesDownstream bridge was washed out. Unable to determine if it was caused by dam breach or natural flooding due to heavy rain. Dam was discovered by our staff in 2014 in aerial photos and was inspected in May 2015. The dam had evidently breached a short time prior to the inspection. We have no plans for the dam. We do not think the dam had a principal spillway.
Owner Type
Dam TypeRE
Primary Purpose(s)P
EAPNR
Dam Height25 ft
Max Storage (ac-ft)411.00
Surface Area (acres)21.00
Year Completed
NID NumberNE06722
River Name
Latitude40.177
Longitude-97.5594
Year Modified
Regulatory Agency(ies)NE DNR
Incident Time
Incident Duration
Incident Report ProducedNo
Information SourcesNeDNR
