|
Incident ID |
WA00320-2267 |
|
Dam Name |
HAWKINS DAM |
|
Downstream Hazard Potential |
S |
|
State |
WA |
|
Incident Date |
08/21/2014 |
|
Incident Type |
Failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Spillway Erosion/head Cutting |
|
Incident Mechanism 2 |
|
|
Incident Mechanism 3 |
|
|
Incident Description |
Fire-swept Benson Creek watershed received from 0.4 to 0.9 inches of rain in one hour. Debris obstructed the spillway-the dam didn't overtop. Erosion in the spillway channel down-cut into the lake and draining it. |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
|
|
Fatalities (Number) |
0 |
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
0 |
|
Number of Habitable Structures Flooded |
0 |
|
Other Infrastructure Impacts |
|
|
Economic Damages (in $) |
None |
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
See the attached incident report. |
|
Incident Time |
|
|
Incident Duration |
|
|
Incident Report Produced |
Yes |
|
Information Sources |
|
|
Owner Type |
P |
|
Dam Type |
RE |
|
Primary Purpose(s) |
IR |
|
EAP |
N |
|
Year Completed |
1940 |
|
Year Modified |
1992 |
|
Dam Height |
33 ft |
|
Max Storage (ac-ft) |
60 ac-ft |
|
Surface Area (acres) |
3 acres |
|
River Name |
TR-BENSON CREEK |
|
Latitude |
48.3139 |
|
Longitude |
-120.002 |
|
Regulatory Agency(ies) |
Washington, Dept of Ecology |
|
NID Number |
WA00320 |
|
Attachments |
Y |
