Incident ID |
PA00193-3216 |
Dam Name |
RYERSON STATION |
Downstream Hazard Potential |
H |
State |
PA |
Incident Date |
06/28/2005 |
Incident Type |
Non-failure |
Incident Driver |
Seepage/internal Erosion |
Incident Mechanism 1 |
Cracking |
Incident Mechanism 2 |
Excessive/increased Seepage |
Incident Mechanism 3 |
|
Incident Description |
NORMAL INSPECTION SHOWED CRACKING AND SEEPAGE POSSIBLY RELATED TO NEARBY UNDERGROUND MINING |
Named Hydrologic Event |
|
EAP Enacted (Y/N) due to Incident |
Yes |
Fatalities (Number) |
0 |
Number of People Evacuated |
|
Number of Habitable Structures Evacuated |
1 |
Number of Habitable Structures Flooded |
|
Other Infrastructure Impacts |
Other |
Economic Damages (in $) |
$25 million to $50 million |
Volume released at failure (ac-ft) |
|
Response |
DAM WAS DRAWN DOWN 10 FEET AND EVENTUALLY BREACHED. |
Additional Remarks or Updates |
ONGOING MONITORING SHOWN CONTINUING MOVEMENT. REBUILDING PLAN WAS ABANDONED IN 2015. LOSS OF PUBLIC BOATING AND FISHING OPPORTUNITIES AT A STATE PARK. |
Incident Time |
|
Incident Duration |
|
Incident Report Produced |
|
Information Sources |
PA Dam Safety |
Owner Type |
S |
Dam Type |
CNPG |
Primary Purpose(s) |
R |
EAP |
N |
Year Completed |
1960 |
Year Modified |
0 |
Dam Height |
42 ft |
Max Storage (ac-ft) |
3500 ac-ft |
Surface Area (acres) |
62 acres |
River Name |
NORTH FORK DUNKARD FORK |
Latitude |
39.89 |
Longitude |
-80.4494 |
Regulatory Agency(ies) |
PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL PROTECTION |
NID Number |
PA00193 |
Attachments |
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