|
Incident ID |
CA00701-1900 |
|
Dam Name |
MCMAHON |
|
Downstream Hazard Potential |
S |
|
State |
CA |
|
Incident Date |
04/17/2012 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Manmade Action |
|
Incident Mechanism 1 |
Spillway Pipe Failure |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
Sudden closure d/s valve while u/s valve was open, the hydraulic pressure caused an 8-inch section of PVC pipe to rupture. |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
No |
|
Fatalities (Number) |
|
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
|
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
None |
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
An 8-inch diameter TEE of of the main outlet pipe ruptures while attempting to close the d/s butterfly valve. Small uncontrolled release, no other significant damage |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
|
|
Information Sources |
|
|
Owner Type |
P |
|
Dam Type |
RE |
|
Primary Purpose(s) |
IS |
|
EAP |
NR |
|
Year Completed |
1957 |
|
Year Modified |
0 |
|
Dam Height |
52 ft |
|
Max Storage (ac-ft) |
878 ac-ft |
|
Surface Area (acres) |
26 acres |
|
River Name |
MAXWELL CREEK |
|
Latitude |
37.6997 |
|
Longitude |
-120.201 |
|
Regulatory Agency(ies) |
Division of Safety of Dams |
|
NID Number |
CA00701 |
|
Attachments |
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