JOHNSTOWN - CO01772-3449
Dam Name: JOHNSTOWN
State: CO
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 09/25/2020
Incident Driver: Manmade Action
Incident Mechanism 1: Accident or Misoperation
Incident Mechanism 2Excessive/Increased Seepage
Incident Mechanism 3
Incident IDCO01772-3449
Incident Description
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentYes
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 Updates
Owner TypeL
Dam TypeRE
Primary Purpose(s)S
EAPY
Dam Height16 ft
Max Storage (ac-ft)258.00
Surface Area (acres)34.00
Year Completed1953
NID NumberCO01772
River NameBIG THOMPSON RIVER-OS
Latitude40.3375
Longitude-104.959
Year Modified
Regulatory Agency(ies)DWR
Incident Time11:50 AM
Incident Duration2 days
Incident Report ProducedYes
Information SourcesCO DWR
