HEARNS POND DAM - DE00060-1206
Dam Name: HEARNS POND DAM
State: DE
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 09/08/2011
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Overtopping
Incident Mechanism 2
Incident Mechanism 3
Incident IDDE00060-1206
Incident DescriptionOvertopping occurred in two separate low areas on the crest of the dam. Minor erosion occurred on the grass downstream slope near the left abutment, and some minor displacement of riprap occurred on the downstream slope near the right abutment.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)
Number of People Evacuated0
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded0
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)0
Additional Remarks or UpdatesDam started overtopping around 7 or 8 pm on 9/08/2011 and overtopping continued until about 8 am on 9/09/2011. Sandbags were placed across each of the low areas on 9/08/2011, which helped to spread out the overtopping flow and reduce erosion.
Owner TypeS
Dam TypeREPG
Primary Purpose(s)RF
EAPN
Dam Height14 ft
Max Storage (ac-ft)1434.00
Surface Area (acres)24.00
Year Completed1912
NID NumberDE00060
River NameCLEAR BROOK
Latitude38.6793
Longitude-75.594
Year Modified
2002
Regulatory Agency(ies)DNREC
Incident Time12:00 AM
Incident Duration
Incident Report Produced
Information Sources
