LOWER IPC DAM - NH00480-3441
Dam Name: LOWER IPC DAM
State: NH
Downstream Hazard Potential: S
Incident Type: Non-Failure
Incident Date: 06/22/2020
Incident Driver: Seepage/Internal Erosion
Incident Mechanism 1: Piping
Incident Mechanism 2Excessive/Increased Seepage
Incident Mechanism 3
Incident IDNH00480-3441
Incident DescriptionTwo whirlpools were observed upstream of the TC spillway
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure ImpactsNone
Economic Damages (in $)Unknown
Response
Volume released at failure (ac-ft)
Additional Remarks or UpdatesLow level gate opened until repairs were made
Owner TypeP
Dam TypeCNTC
Primary Purpose(s)H
EAPY
Dam Height16 ft
Max Storage (ac-ft)31.00
Surface Area (acres)2.00
Year Completed1934
NID NumberNH00480
River NameNEWFOUND RIVER
Latitude43.6
Longitude-71.748
Year Modified
1937
Regulatory Agency(ies)NHDES DAM BUREAU
Incident Time
Incident Duration68 days
Incident Report ProducedYes
Information SourcesNHDES DAM BUREAU
