LAKE HIDDENWOOD DAM - SD00750-3253
Dam Name: LAKE HIDDENWOOD DAM
State: SD
Downstream Hazard Potential: L
Incident Type: Failure
Incident Date: 05/18/2018
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Overtopping
Incident Mechanism 2
Incident Mechanism 3
Incident IDSD00750-3253
Incident Description
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)0
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure ImpactsBridges, Roads
Economic Damages (in $)Unknown
Responsepost failure site visit by staff from SD Dam Safety and owner staff, owner closed recreation area associated with the dam
Volume released at failure (ac-ft)
Additional Remarks or Updateslow hazard dam so was not required to have an EAP, also no habitable structures in the downstream flood plain, bridge across the dam's spillway and gravel road across the crest were washed out, also some flash flooding of downstream cropland
Owner TypeS
Dam TypeRE
Primary Purpose(s)R
EAPNR
Dam Height27 ft
Max Storage (ac-ft)474.00
Surface Area (acres)27.00
Year Completed1926
NID NumberSD00750
River NameTR MISSOURI
Latitude0
Longitude0
Year Modified
Regulatory Agency(ies)SD DENR
Incident Time
Incident Duration
Incident Report ProducedNo
Information SourcesSD DENR
