|
Incident ID |
MI00549-3511 |
|
Dam Name |
EDENVILLE |
|
Downstream Hazard Potential |
H |
|
State |
MI |
|
Incident Date |
05/19/2020 |
|
Incident Type |
Failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Slope Stability |
|
Incident Mechanism 2 |
High Reservoir Level |
|
Incident Mechanism 3 |
|
|
Incident Description |
In the IFT’s opinion, the most plausible principal mechanism for the failure of Edenville Dam, supported by strong evidence, is static liquefaction (flow) instability of saturated, loose sands in the downstream section of the embankment. The record lake level at the time of the failure and the duration of high water levels almost certainly contributed to the static liquefaction instability failure. |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
Yes |
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
10000 |
|
Number of Habitable Structures Evacuated |
3000 |
|
Number of Habitable Structures Flooded |
3000 |
|
Other Infrastructure Impacts |
Dams Downstream |
|
Economic Damages (in $) |
over $100 million |
|
Volume released at failure (ac-ft) |
66200 ac-ft |
|
Response |
See IFT Report |
|
Additional Remarks or Updates |
According to the 2020 major disaster declaration request by the State (Michigan 2020), the damage across
a five-county area was estimated at roughly $190 million in losses for residents. Over 3,000 homes were
affected, and there was $55 million in damage to public infrastructure. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
Yes |
|
Information Sources |
2022 IFT Report |
|
Owner Type |
P |
|
Dam Type |
PGRE |
|
Primary Purpose(s) |
CH |
|
EAP |
Y |
|
Year Completed |
1925 |
|
Year Modified |
0 |
|
Dam Height |
54 ft |
|
Max Storage (ac-ft) |
66200 ac-ft |
|
Surface Area (acres) |
2600 acres |
|
River Name |
TITTAWABASSEE RIVER |
|
Latitude |
43.8142 |
|
Longitude |
-84.3769 |
|
Regulatory Agency(ies) |
MICHIGAN DEQ |
|
NID Number |
MI00549 |
|
Attachments |
Y |
