|
Incident ID |
DE00051-3104 |
|
Dam Name |
SILVER LAKE DAM - MIDDLETOWN |
|
Downstream Hazard Potential |
H |
|
State |
DE |
|
Incident Date |
07/06/2017 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Deterioration Or Poor Condition |
|
Incident Mechanism 1 |
Gate/valve Failure |
|
Incident Mechanism 2 |
Insufficient Spillway Capacity |
|
Incident Mechanism 3 |
|
|
Incident Description |
A pop-up storm caused the road to nearly overtop and gates in the left spillway were opened. The gates could not be closed due to deflection and breakage and the pond continued to lower. |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
No |
|
Fatalities (Number) |
|
|
Number of People Evacuated |
|
|
Number of Habitable Structures Evacuated |
|
|
Number of Habitable Structures Flooded |
|
|
Other Infrastructure Impacts |
Roads |
|
Economic Damages (in $) |
$500,000 to $1 million |
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
An emergency cofferdam was placed in front of gates to prevent pond from emptying. EAP procedures were followed but it was not "officially" activated. Design has been initiated to replace the gates. The economic damages only includes emergency construction of temporary sheeting and proposed design costs. We will not have an estimate for constrution costs until the design is complete. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
Yes |
|
Information Sources |
DelDOT and DNREC Dam Safety Program |
|
Owner Type |
S |
|
Dam Type |
PGRE |
|
Primary Purpose(s) |
R |
|
EAP |
Y |
|
Year Completed |
1945 |
|
Year Modified |
0 |
|
Dam Height |
18 ft |
|
Max Storage (ac-ft) |
591 ac-ft |
|
Surface Area (acres) |
39 acres |
|
River Name |
DEEP CREEK |
|
Latitude |
39.438 |
|
Longitude |
-75.6934 |
|
Regulatory Agency(ies) |
DNREC |
|
NID Number |
DE00051 |
|
Attachments |
Y |
