JEFFERSON LAKE - CO00363-3169
Incident ID CO00363-3169
Dam Name JEFFERSON LAKE
Downstream Hazard Potential H
State CO
Incident Date 06/22/2017
Incident Type Non-failure
Incident Driver Seepage/internal Erosion
Incident Mechanism 1 Excessive/increased Seepage
Incident Mechanism 2 Erosion
Incident Mechanism 3
Incident Description Owners 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 Incident Yes
Fatalities (Number)
Number of People Evacuated
Number of Habitable Structures Evacuated
Number of Habitable Structures Flooded
Other Infrastructure Impacts
Economic Damages (in $)
Volume released at failure (ac-ft)
Response restrictred water level and observation
Additional Remarks or Updates Resulted in an emergency field investigation and a reservoir storage restriction. Owner is working with Engineer to develop a repair plan
Incident Time 14:20
Incident Duration 2 days
Incident Report Produced Yes
Information Sources CO DWR
Owner Type L
Dam Type RE
Primary Purpose(s) S
EAP Y
Year Completed 1951
Year Modified 0
Dam Height 33 ft
Max Storage (ac-ft) 3417 ac-ft
Surface Area (acres) 126 acres
River Name JEFFERSON CREEK
Latitude 39.4506
Longitude -105.863
Regulatory Agency(ies) DWR
NID Number CO00363
Attachments
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