LONG LAKE DAM - AK00044-3459
Dam Name: LONG LAKE DAM
State: AK
Downstream Hazard Potential: L
Incident Type: Non-Failure
Incident Date: 09/27/2021
Incident Driver: Malfunction of Equipment/Gate
Incident Mechanism 1: Gate/Valve Failure
Incident Mechanism 2
Incident Mechanism 3
Incident IDAK00044-3459
Incident DescriptionA log damaged flashboards causing an overtopping event
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure Impacts
Economic Damages (in $)Unknown
ResponseDam owner repaired the flashboards
Volume released at failure (ac-ft)
Additional Remarks or Updates
Owner TypeU
Dam TypeCNPG
Primary Purpose(s)H
EAPNR
Dam Height30 ft
Max Storage (ac-ft)147000.00
Surface Area (acres)1375.00
Year Completed1973
NID NumberAK00044
River NameLONG RIVER
Latitude58.1667
Longitude-133.733
Year Modified
Regulatory Agency(ies)AKDNR
Incident Time
Incident Duration
Incident Report ProducedYes
Information SourcesAKDNR
