LAKE ZUMBRO CDF - MN01822-3355
Dam Name: LAKE ZUMBRO CDF
State: MN
Downstream Hazard Potential: L
Incident Type: Failure
Incident Date: 11/22/2019
Incident Driver: Structural Stability
Incident Mechanism 1: Foundation Deficiency
Incident Mechanism 2Slope Stability
Incident Mechanism 3
Incident IDMN01822-3355
Incident DescriptionNew dam. Concerns about possible karst at spillway. Dam failed during initial filling 2 to 3 feet below design level.
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 ImpactsOther
Economic Damages (in $)$1 to $100,000
ResponseEmergency repairs of breach. Dredging downstream harbor of sediments.
Volume released at failure (ac-ft)
Additional Remarks or UpdatesLarge debris flow into downstream lake needed cleanout.
Rock foundation failure under core trench. 30 foot wide, vertical wall, 50 foot north of outlet.
Rock foundation failure under core trench. 30 foot wide, vertical wall, 50 foot north of outlet.
Owner TypeL
Dam TypeRE
Primary Purpose(s)O
EAPNR
Dam Height37 ft
Max Storage (ac-ft)518.00
Surface Area (acres)0.00
Year Completed
NID NumberMN01822
River Name
Latitude44.1695
Longitude-92.4304
Year Modified
Regulatory Agency(ies)MNDNR EWR
Incident Time
Incident Duration
Incident Report ProducedYes
Information SourcesMN Dam Safety
