SILVER LAKE DAM - MIDDLETOWN - DE00051-3104
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
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