MCCLOUD - CA00416-3517
Dam Name: MCCLOUD
State: CA
Downstream Hazard Potential: H
Incident Type: Non-Failure
Incident Date: 12/14/2022
Incident Driver: Unknown
Incident Mechanism 1: Other
Incident Mechanism 2
Incident Mechanism 3
Incident IDCA00416-3517
Incident DescriptionCracked weld observed on 30-inch bypass pipeline - bypass branches off from 7-ft downstream of low level outlet; controlled by 30" butterfly valve guard gate and 24" Howell bunger valve. Crack is ~20" length, from 2 to 5 o'clock, u/s of guard valve flange. Spray of pressurized water from crack.
Named Hydrologic Event
EAP Enacted (Y/N) due to IncidentNo
Fatalities (Number)
Number of People Evacuated0
Number of Habitable Structures Evacuated0
Number of Habitable Structures Flooded0
Other Infrastructure ImpactsNone
Economic Damages (in $)None
ResponseOwner responded quickly upon noticing the cracked pipe and notified state and federal regulators. A temporary repair was completed 12/28/22.
Volume released at failure (ac-ft)
Additional Remarks or Updates
Owner TypeP
Dam TypeRE
Primary Purpose(s)H
EAPY
Dam Height241 ft
Max Storage (ac-ft)35234.00
Surface Area (acres)520.00
Year Completed1965
NID NumberCA00416
River NameMCCLOUD RIVER
Latitude41.1309
Longitude-122.071
Year Modified
Regulatory Agency(ies)DWR, SAFETY OF DAMS
Incident Time
Incident Duration2 weeks
Incident Report ProducedYes
Information SourcesCA DSOD
