LOCH ALSH RESERVOIR - PA00935-3191
Dam Name: LOCH ALSH RESERVOIR
State: PA
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 09/08/2011
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Overtopping
Incident Mechanism 2
Incident Mechanism 3
Incident IDPA00935-3191
Incident DescriptionTROPICAL STORM LEE CAUSED OVERTOPPING OF DAM WITH 5 INCHES RAINFALL IN 3 HOURS
Named Hydrologic EventTS Lee
EAP Enacted (Y/N) due to IncidentYes
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or Updates
Owner TypeL
Dam TypeMSREST
Primary Purpose(s)R
EAPY
Dam Height16 ft
Max Storage (ac-ft)41.00
Surface Area (acres)6.00
Year Completed1915
NID NumberPA00935
River NameTR WISSAHICKON CREEK
Latitude40.1558
Longitude-75.2047
Year Modified
Regulatory Agency(ies)PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL PROTECTION
Incident Time
Incident Duration1 DAY
Incident Report Produced
Information SourcesPA Dam Safety
