Riondas (Flamms) Pond Dam - NJ00000-3429
Dam Name: Riondas (Flamms) Pond Dam
State: NJ
Downstream Hazard Potential: L
Incident Type: Non-Failure
Incident Date: 09/03/2021
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Overtopping
Incident Mechanism 2
Incident Mechanism 3
Incident IDNJ00000-3429
Incident DescriptionInspection performed by NJ Dam Safety on September 3, 2021 revealed overtopping of dam embankment occurred causing significant erosion of downstream embankment slope and portion of crest.
Named Hydrologic EventTS Ida
EAP Enacted (Y/N) due to IncidentUnknown
Fatalities (Number)
Number of People EvacuatedUnknown
Number of Habitable Structures EvacuatedUnknown
Number of Habitable Structures FloodedUnknown
Other Infrastructure Impacts
Economic Damages (in $)
ResponseLake has been drained and temporary armored channel has been cut through embankment as interim measure until permanent repair or decommissioning can be completed.
Volume released at failure (ac-ft)
Additional Remarks or Updates
Owner TypeP
Dam TypeRE
Primary Purpose(s)R
EAPNR
Dam Height10 ft
Max Storage (ac-ft)
Surface Area (acres)2.00
Year Completed0
NID NumberNJ00000
River NameHackensack River
Latitude40.945
Longitude-73.948
Year Modified
Regulatory Agency(ies)NJDEP
Incident Time
Incident Duration
Incident Report Produced
Information SourcesNJDEP
