LAKE NANCY DAM - NY01065-3164
Incident ID NY01065-3164
Dam Name LAKE NANCY DAM
Downstream Hazard Potential L
State NY
Incident Date 09/06/2017
Incident Type Non-failure
Incident Driver Seepage/internal Erosion
Incident Mechanism 1 Excessive/increased Seepage
Incident Mechanism 2 Piping
Incident Mechanism 3
Incident Description Increased seepage from earth (possibly formerly timber crib) dam. Whirlpool in reservoir. Reservoir was lowered and seepage was sealed with grouting program
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident No
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Volume released at failure (ac-ft)
Response
Additional Remarks or Updates Attempt to seal whirlpool were unsuccesful. Lake was drained with pumps and embankment voids were filled with grout
Incident Time
Incident Duration 1 week
Incident Report Produced No
Information Sources NY DEC
Owner Type L
Dam Type RE
Primary Purpose(s) R
EAP NR
Year Completed 1977
Year Modified 0
Dam Height 17 ft
Max Storage (ac-ft) 1093 ac-ft
Surface Area (acres) 62 acres
River Name LADMAN CREEK
Latitude 43.1141
Longitude -74.0097
Regulatory Agency(ies) NYS DEC
NID Number NY01065
Attachments
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