|
Incident ID |
SC00638-3120 |
|
Dam Name |
DAVIDS MILLPOND DAM |
|
Downstream Hazard Potential |
S |
|
State |
SC |
|
Incident Date |
09/16/2018 |
|
Incident Type |
Failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Insufficient Spillway Capacity |
|
Incident Mechanism 2 |
Overtopping |
|
Incident Mechanism 3 |
Erosion |
|
Incident Description |
Simply appears dam overtopped during the heavy rainfall associated with Hurricane Florence and suffered headcut erosion on the downstream slope at location of primary spillway. Auxiliary spillway is a concrete chute but is severely restricted by "orifice" at outlet. |
|
Named Hydrologic Event |
Hurricane Florence |
|
EAP Enacted (Y/N) due to Incident |
No |
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
0 |
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
Roads |
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
State Dam Safety Program performed a full inspection following the breach of this dam. The inspection report will contain a requirement that the Owner hire an engineer and submit either a permit application for repair or removal of the dam. |
|
Additional Remarks or Updates |
Report on dam failures associated with Hurricane Florence to be released by Geotechnical Extreme Event Reconnaisance (GEER) group at some point in the future. GEER team field work occurred during month of September 2018. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
SC Dam Safety |
|
Owner Type |
P |
|
Dam Type |
RE |
|
Primary Purpose(s) |
O |
|
EAP |
Y |
|
Year Completed |
1870 |
|
Year Modified |
0 |
|
Dam Height |
9 ft |
|
Max Storage (ac-ft) |
394 ac-ft |
|
Surface Area (acres) |
45 acres |
|
River Name |
NAKED CREEK |
|
Latitude |
34.6443 |
|
Longitude |
-79.7482 |
|
Regulatory Agency(ies) |
SC DHEC |
|
NID Number |
SC00638 |
|
Attachments |
|
