|
Incident ID |
PA00000-102 |
|
Dam Name |
SOUTH FORK (AKA JOHNSTOWN DAM) |
|
Downstream Hazard Potential |
H |
|
State |
PA |
|
Incident Date |
01/01/1889 |
|
Incident Type |
Failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Overtopping |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
|
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
No |
|
Fatalities (Number) |
2209 |
|
Number of People Evacuated |
|
|
Number of Habitable Structures Evacuated |
|
|
Number of Habitable Structures Flooded |
|
|
Other Infrastructure Impacts |
|
|
Economic Damages (in $) |
$10 million to $25 million |
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
37 high wall of water hit Johnstown, 9 miles downstream. The dam had a deficient outlet and spillway, had been improperly maintained, and was overtopped and washed out during heavy rains. It took 57 minutes for the 30-40 ft-high floodwave (which had re
Fatalities: 2209 - Victims: 99 entire families, 396 children under the age of 10, and 755 unidentified victims. 45% of the victims whose ages were known were under 20. More than 1 in every 5 residents of Johnstown were killed. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
|
|
Owner Type |
|
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
|
|
Year Completed |
0 |
|
Year Modified |
0 |
|
Dam Height |
72 ft |
|
Max Storage (ac-ft) |
0 ac-ft |
|
Surface Area (acres) |
0 acres |
|
River Name |
LITTLE CONEMAUGH RIVER |
|
Latitude |
0 |
|
Longitude |
0 |
|
Regulatory Agency(ies) |
|
|
NID Number |
PA00000 |
|
Attachments |
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