|
Incident ID |
SD00407-2140 |
|
Dam Name |
BUFFALO LAKE ROAD DAM 2 |
|
Downstream Hazard Potential |
S |
|
State |
SD |
|
Incident Date |
06/23/2014 |
|
Incident Type |
Failure |
|
Incident Driver |
Deterioration Or Poor Condition |
|
Incident Mechanism 1 |
Spillway Pipe Failure |
|
Incident Mechanism 2 |
Piping |
|
Incident Mechanism 3 |
Sinkhole |
|
Incident Description |
Based 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 |
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|
Number of Habitable Structures Flooded |
|
|
Other Infrastructure Impacts |
Roads |
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
The CMP Spillway was added about 25 years ago per SD Dam Safety. Attached photos from both dam 1 & 2. |
|
Incident Time |
|
|
Incident Duration |
|
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Incident Report Produced |
|
|
Information Sources |
|
|
Owner Type |
S |
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
Y |
|
Year Completed |
1961 |
|
Year Modified |
1991 |
|
Dam Height |
82 ft |
|
Max Storage (ac-ft) |
2850 ac-ft |
|
Surface Area (acres) |
0 acres |
|
River Name |
TR CHEYENNE |
|
Latitude |
44.6217 |
|
Longitude |
-102.003 |
|
Regulatory Agency(ies) |
DENR |
|
NID Number |
SD00407 |
|
Attachments |
Y |
