PINE GROVE LAKE DAM - NY13266-3365
Dam Name: PINE GROVE LAKE DAM
State: NY
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 08/04/2020
Incident Driver: Other
Incident Mechanism 1: Vegetation
Incident Mechanism 2
Incident Mechanism 3
Incident IDNY13266-3365
Incident DescriptionEmbankment has extensive trees. High winds caused a tree to fall at the downstream edge of the dam crest. This created a void in the embankment and a crack in the soil around the tree roots, however further examination conluded the cracking was due to earth being pulled away by the roots, not due to dam slope sliding.
Named Hydrologic EventRemnant of Tropical Storm Isaias
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)0
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure Impacts
Economic Damages (in $)
Response
Volume released at failure (ac-ft)
Additional Remarks or Updatestree and roots were removed, embankment was repaired. Additional tree clearing required
Owner TypeP
Dam TypeRE
Primary Purpose(s)R
EAPY
Dam Height12 ft
Max Storage (ac-ft)26.00
Surface Area (acres)5.00
Year Completed1968
NID NumberNY13266
River NameTR-RAMAPO RIVER
Latitude41.16
Longitude-74.1778
Year Modified
Regulatory Agency(ies)NYS DEC
Incident Time
Incident Duration
Incident Report ProducedNo
Information SourcesNY Dam Safety
