|
Incident ID |
NE06722-3033 |
|
Dam Name |
DAM NE06722 |
|
Downstream Hazard Potential |
L |
|
State |
NE |
|
Incident Date |
05/07/2015 |
|
Incident Type |
Failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Overtopping |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
Dam 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 Incident |
No |
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
0 |
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
Bridges |
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
175 ac-ft |
|
Response |
|
|
Additional Remarks or Updates |
Downstream 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. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
No |
|
Information Sources |
NeDNR |
|
Owner Type |
|
|
Dam Type |
RE |
|
Primary Purpose(s) |
P |
|
EAP |
NR |
|
Year Completed |
0 |
|
Year Modified |
0 |
|
Dam Height |
25 ft |
|
Max Storage (ac-ft) |
411 ac-ft |
|
Surface Area (acres) |
21 acres |
|
River Name |
|
|
Latitude |
40.177 |
|
Longitude |
-97.5594 |
|
Regulatory Agency(ies) |
NE DNR |
|
NID Number |
NE06722 |
|
Attachments |
|
