|
Incident ID |
DE00030-1204 |
|
Dam Name |
GARRISONS LAKE DAM |
|
Downstream Hazard Potential |
H |
|
State |
DE |
|
Incident Date |
08/28/2011 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Overtopping |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
Dam started overtopping around 4 am, and overtopping continued until 10 or 11 am. Overtopping flow was confined to one location and due to the clay core of the dam only minor erosion occurred. |
|
Named Hydrologic Event |
Irene |
|
EAP Enacted (Y/N) due to Incident |
No |
|
Fatalities (Number) |
|
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
|
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
None |
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
0 ac-ft |
|
Response |
|
|
Additional Remarks or Updates |
Adequate warning was provided to remove spillway flashboards several days prior to the storm to lower pond level in advance, which helped to minimize damage.
Eroded areas were sandbagged on 8/29/2011 as a temporary measure to prevent further erosion. |
|
Incident Time |
12:00 AM |
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
|
|
Owner Type |
S |
|
Dam Type |
REPG |
|
Primary Purpose(s) |
RF |
|
EAP |
N |
|
Year Completed |
1964 |
|
Year Modified |
0 |
|
Dam Height |
10 ft |
|
Max Storage (ac-ft) |
1164 ac-ft |
|
Surface Area (acres) |
86 acres |
|
River Name |
LEIPSIC RIVER |
|
Latitude |
39.244 |
|
Longitude |
-75.5884 |
|
Regulatory Agency(ies) |
DNREC |
|
NID Number |
DE00030 |
|
Attachments |
|
