|
Incident ID |
MI00544-1460 |
|
Dam Name |
BROWN BRIDGE DAM |
|
Downstream Hazard Potential |
H |
|
State |
MI |
|
Incident Date |
10/08/2012 |
|
Incident Type |
Failure |
|
Incident Driver |
Seepage/internal Erosion |
|
Incident Mechanism 1 |
Foundation Deficiency |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
Investigation determined water pressure destabilized subsurface soils and led to erosion of foundation soils, release of water beneath the control structure and collapse of an earthen embankment beside part of the drawdown structure. |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
|
|
Fatalities (Number) |
|
|
Number of People Evacuated |
|
|
Number of Habitable Structures Evacuated |
|
|
Number of Habitable Structures Flooded |
|
|
Other Infrastructure Impacts |
|
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
Failure of a temporary dam put in place to gradually release water from Brown Bridge pond. Report of 66 properties damaged.
Property-damage lawsuits pending. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
|
|
Owner Type |
|
|
Dam Type |
PGRE |
|
Primary Purpose(s) |
|
|
EAP |
Y |
|
Year Completed |
1921 |
|
Year Modified |
0 |
|
Dam Height |
46 ft |
|
Max Storage (ac-ft) |
2800 ac-ft |
|
Surface Area (acres) |
191 acres |
|
River Name |
BOARDMAN RIVER |
|
Latitude |
44.6434 |
|
Longitude |
-85.5095 |
|
Regulatory Agency(ies) |
Michigan DEQ |
|
NID Number |
MI00544 |
|
Attachments |
Y |
