JEFFERSON LAKE - CO00363-3169
Dam Name: JEFFERSON LAKE
State: CO
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 06/22/2017
Incident Driver: Seepage/Internal Erosion
Incident Mechanism 1: Excessive/Increased Seepage
Incident Mechanism 2Erosion
Incident Mechanism 3
Incident IDCO00363-3169
Incident DescriptionOwners staff observed a small whirlpool in the reservoir at the reservoir edge adjacent to the dam. Possible contact erosion PFM. Resulted in an emergecy field investigation and a reservoir storage restriction.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentYes
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Responserestrictred water level and observation
Volume released at failure (ac-ft)
Additional Remarks or UpdatesResulted in an emergency field investigation and a reservoir storage restriction. Owner is working with Engineer to develop a repair plan
Owner TypeL
Dam TypeRE
Primary Purpose(s)S
EAPY
Dam Height33 ft
Max Storage (ac-ft)3417.00
Surface Area (acres)126.00
Year Completed1951
NID NumberCO00363
River NameJEFFERSON CREEK
Latitude39.4506
Longitude-105.863
Year Modified
Regulatory Agency(ies)DWR
Incident Time14:20
Incident Duration2 days
Incident Report ProducedYes
Information SourcesCO DWR
