SHANNON LAKE DAM - NH00562-3588
Dam Name: SHANNON LAKE DAM
State: NH
Downstream Hazard Potential: S
Incident Type: Non-Failure
Incident Date: 06/28/2023
Incident Driver: Hydrologic/Flooding
Incident Mechanism 1: Spillway Erosion/Head Cutting
Incident Mechanism 2
Incident Mechanism 3
Incident IDNH00562-3588
Incident Descriptionerosion of earthen auxiliary spillway
Named Hydrologic Event
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 ImpactsNone
Economic Damages (in $)$1 to $100,000
Response
Volume released at failure (ac-ft)
Additional Remarks or Updates
Owner TypeP
Dam TypeRE
Primary Purpose(s)R
EAPN
Dam Height20 ft
Max Storage (ac-ft)21.00
Surface Area (acres)4.00
Year Completed1969
NID NumberNH00562
River NameSHANNON BROOK
Latitude43.7322
Longitude-71.3225
Year Modified
Regulatory Agency(ies)NHDES DAM BUREAU
Incident Time
Incident Duration1 Day
Incident Report ProducedNo
Information SourcesNH DES
