BUFFALO LAKE ROAD DAM 1 - SD00518-2141
Dam Name: BUFFALO LAKE ROAD DAM 1
State: SD
Downstream Hazard Potential: S
Incident Type: Failure
Incident Date: 06/23/2014
Incident Driver: Deterioration or Poor Condition
Incident Mechanism 1: Spillway Pipe Failure
Incident Mechanism 2
Incident Mechanism 3
Incident IDSD00518-2141
Incident DescriptionBased on news reports and SD Dam Safety info it appears that CMP spillways deteriorated and failed causing internal erosion and sink holes. High water in the lake exacerbated the erosion.
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 ImpactsRoads
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or UpdatesThe CMP Spillway was added about 25 years ago per SD Dam Safety. Attached photos from both dam 1 & 2.
Owner TypeS
Dam TypeRE
Primary Purpose(s)R
EAPY
Dam Height95 ft
Max Storage (ac-ft)2650.00
Surface Area (acres)0.00
Year Completed1961
NID NumberSD00518
River NameTR CHEYENNE
Latitude44.635
Longitude-101.897
Year Modified
1991
Regulatory Agency(ies)DENR
Incident Time
Incident Duration
Incident Report Produced
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