|
Incident ID |
SD00758-3405 |
|
Dam Name |
JONES LAKE DAM |
|
Downstream Hazard Potential |
H |
|
State |
SD |
|
Incident Date |
06/13/2019 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Unknown |
|
Incident Mechanism 1 |
Sinkhole |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
The conduit spillway of the dam's two primary spillways had a sinkhole with seepage develop around it on the downstream side. |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
Yes |
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
unknown |
|
Number of Habitable Structures Evacuated |
unknown |
|
Number of Habitable Structures Flooded |
unknown |
|
Other Infrastructure Impacts |
|
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
The county emergency manager notified residents downstream of the dam of the situation. The owner used pumps to lower the water level and put a temporary berm across the conduit inlet. |
|
Additional Remarks or Updates |
A very wet spring and early summer likely contributed to the issue. A permanent repair was done in Fall of 2019. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
SD Dam Safety |
|
Owner Type |
S |
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
Y |
|
Year Completed |
1938 |
|
Year Modified |
2000 |
|
Dam Height |
21 ft |
|
Max Storage (ac-ft) |
1260 ac-ft |
|
Surface Area (acres) |
101 acres |
|
River Name |
TR-JAMES RIVER |
|
Latitude |
44.4783 |
|
Longitude |
-98.9467 |
|
Regulatory Agency(ies) |
DENR |
|
NID Number |
SD00758 |
|
Attachments |
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