SILICA POND DAM - NH01098-3446
Dam Name: SILICA POND DAM
State: NH
Downstream Hazard Potential: S
Incident Type: Failure
Incident Date: 07/01/2022
Incident Driver: Deterioration or Poor Condition
Incident Mechanism 1: Gate/Valve Failure
Incident Mechanism 2
Incident Mechanism 3
Incident IDNH01098-3446
Incident DescriptionFailure of the low level gate resulted in the release of the impoundment. The release was gradual, and it is understood that downstream economic loss was not inflicted.
Named Hydrologic Event
EAP Enacted (Y/N) due to Incident
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure ImpactsNone
Economic Damages (in $)Unknown
Response
Volume released at failure (ac-ft)4
Additional Remarks or UpdatesThe dam owner is presently evaluating reconstruction or removal options.
Owner TypeL
Dam TypeRE
Primary Purpose(s)R
EAPNR
Dam Height9 ft
Max Storage (ac-ft)29.00
Surface Area (acres)3.00
Year Completed1935
NID NumberNH01098
River NameUnnamed
Latitude42.8227
Longitude-72.1869
Year Modified
Regulatory Agency(ies)NHDES
Incident Time
Incident Duration1 day
Incident Report Produced
Information SourcesNHDES
