LAKE LEHMAN - PA00341-3214
Dam Name: LAKE LEHMAN
State: PA
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 08/23/2010
Incident Driver: Seepage/Internal Erosion
Incident Mechanism 1: Excessive/Increased Seepage
Incident Mechanism 2
Incident Mechanism 3
Incident IDPA00341-3214
Incident DescriptionNEW & SIGNIFICANT SEEPAGE WAS OBSERVED ALONG A GUIDE WALL, DOWNSTREAM END OF OUTLET PIPE.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
ResponseOWNER ISTRUCTED TO LOWER LAKE AT RATE OF 1 FT PER DAY. LAKE MAINTAINED 10' BELOW NORMAL POOL.
Volume released at failure (ac-ft)
Additional Remarks or UpdatesTHE COMPANY DECIDED TO REMOVE THE DAM UNDER WAIVER TO BREACH; COMPLETED IN 2014-15.
Owner TypeP
Dam TypeRE
Primary Purpose(s)SR
EAP
Dam Height52 ft
Max Storage (ac-ft)
Surface Area (acres)0.00
Year Completed
NID NumberPA00341
River NamePOWDER MILL RUN
Latitude39.5147
Longitude-76.5139
Year Modified
Regulatory Agency(ies)PADEP
Incident Time
Incident Duration
Incident Report Produced
Information SourcesPA Dam Safety
