|
Incident ID |
CA00649-3424 |
|
Dam Name |
TWAIN HARTE |
|
Downstream Hazard Potential |
S |
|
State |
CA |
|
Incident Date |
12/23/2021 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Other |
|
Incident Mechanism 1 |
Abutment Failure |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
Reports of a single loud popping sound heard at the dam site. Potential new occurrence of rock exfoliation of the dam's abutments and foundation. Two dam inspections were conducted from which no signs of recent movement or distress of the dam, abutments, or foundation were observed. Also no new signs of rock exfoliation in the abutments and foundation. Reviewed of our files and recent survey data |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
No |
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
0 |
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
None |
|
Economic Damages (in $) |
None |
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
|
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
Yes |
|
Information Sources |
CA DSOD |
|
Owner Type |
P |
|
Dam Type |
MV |
|
Primary Purpose(s) |
RS |
|
EAP |
N |
|
Year Completed |
1928 |
|
Year Modified |
0 |
|
Dam Height |
36 ft |
|
Max Storage (ac-ft) |
143 ac-ft |
|
Surface Area (acres) |
12 acres |
|
River Name |
UNNAMED CREEK |
|
Latitude |
38.0291 |
|
Longitude |
-120.244 |
|
Regulatory Agency(ies) |
DWR, SAFETY OF DAMS |
|
NID Number |
CA00649 |
|
Attachments |
|
