UPPER BEAVER SUBWATERSHED SITE M-1 - IA00717-3358
Dam Name: UPPER BEAVER SUBWATERSHED SITE M-1
State: IA
Downstream Hazard Potential: L
Incident Type: Non-Failure
Incident Date: 03/01/2019
Incident Driver: Deterioration or Poor Condition
Incident Mechanism 1: Spillway Erosion/Head Cutting
Incident Mechanism 2Accident or Misoperation
Incident Mechanism 3
Incident IDIA00717-3358
Incident DescriptionClogged spillway inlet and high auxiliary spillway flows resulted in significant erosion of the auxiliary spillway channel.
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or Updates
Owner TypeL
Dam TypeRE
Primary Purpose(s)PC
EAPNR
Dam Height60 ft
Max Storage (ac-ft)194.00
Surface Area (acres)8.00
Year Completed1967
NID NumberIA00717
River NameTR-BEAVER CREEK
Latitude42.0612
Longitude-95.8452
Year Modified
Regulatory Agency(ies)IOWA DNR
Incident Time
Incident Duration
Incident Report Produced
Information SourcesIA Dam Safety
