RYERSON STATION - PA00193-3216


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
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