|
Incident ID |
CO01036-3173 |
|
Dam Name |
WILLOW CREEK |
|
Downstream Hazard Potential |
H |
|
State |
CO |
|
Incident Date |
08/19/2017 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Manmade Action |
|
Incident Mechanism 1 |
Other |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
During construction the downstream dewatering pumps quit due to a generator malfunction. Phreatic surface rose and a crack appeared in a construction cut slope on the downstream face. |
|
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 |
Quickly installed a temporary buttress, got pumps running and initiated a more diligent monitoring plan for the pumps, generators and slopes. |
|
Additional Remarks or Updates |
Initiated the construction EAP at an unusual condition level. EAP worked well and brought parties together. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
Yes |
|
Information Sources |
|
|
Owner Type |
S |
|
Dam Type |
RE |
|
Primary Purpose(s) |
R |
|
EAP |
Y |
|
Year Completed |
1966 |
|
Year Modified |
0 |
|
Dam Height |
100 ft |
|
Max Storage (ac-ft) |
36900 ac-ft |
|
Surface Area (acres) |
1011 acres |
|
River Name |
WILLOW CREEK |
|
Latitude |
40.7917 |
|
Longitude |
-106.947 |
|
Regulatory Agency(ies) |
DWR |
|
NID Number |
CO01036 |
|
Attachments |
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