COLUMBIA EMBANKMENT AND CANAL SPILLWAY - SC01064-3505
Dam Name: COLUMBIA EMBANKMENT AND CANAL SPILLWAY
State: SC
Downstream Hazard Potential: S
Incident Type: Failure
Incident Date: 10/04/2015
Incident Driver: Malfunction of Equipment/Gate
Incident Mechanism 1: Debris Clogging
Incident Mechanism 2Insufficient Spillway Capacity
Incident Mechanism 3Overtopping
Incident IDSC01064-3505
Incident DescriptionBreach of 125 yr old canal dike due to debris stuck beneath canal headgates prevent gate closure. Canal embankment overtopped and failed.
Named Hydrologic EventHurricane Joaquin
EAP Enacted (Y/N) due to IncidentYes
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure ImpactsNone
Economic Damages (in $)$50 million to $100 million
ResponseTemp water supply pipes & pumps. Cofferdam across canal. Installed bulkheads upstream of headgates.
Volume released at failure (ac-ft)
Additional Remarks or UpdatesNo impact to Infracture. Loss of hydropower Threatened loss to municiple water supply.
Owner TypeL
Dam TypeREST
Primary Purpose(s)HS
EAPY
Dam Height8 ft
Max Storage (ac-ft)800.00
Surface Area (acres)265.00
Year Completed1882
NID NumberSC01064
River NameBROAD
Latitude34.0333
Longitude-81.0665
Year Modified
Regulatory Agency(ies)FERC
Incident Time8:00 PM
Incident Duration
Incident Report ProducedYes
Information SourcesASDSO Decade Dam Series
