|
Incident ID |
AK00017-3341 |
|
Dam Name |
HESS CREEK DAM |
|
Downstream Hazard Potential |
H |
|
State |
AK |
|
Incident Date |
04/27/2020 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Deterioration Or Poor Condition |
|
Incident Mechanism 1 |
High Reservoir Level |
|
Incident Mechanism 2 |
Debris Clogging |
|
Incident Mechanism 3 |
|
|
Incident Description |
Satellite imagery on 4/25/2020 appears to show the dam is impounding significant amount of water. There is no serviceable
spillway. The low level outlet does not appear to be functioning. Wildfires last year burned area and likely increase runoff and erosion, potentially clogging low level
outlet causing impoundment. |
|
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 |
Inspection and monitoring as the reservoir level receeded. |
|
Additional Remarks or Updates |
|
|
Incident Time |
|
|
Incident Duration |
1 month |
|
Incident Report Produced |
Yes |
|
Information Sources |
Alaska Dam Safety |
|
Owner Type |
P |
|
Dam Type |
RE |
|
Primary Purpose(s) |
S |
|
EAP |
N |
|
Year Completed |
1946 |
|
Year Modified |
0 |
|
Dam Height |
56 ft |
|
Max Storage (ac-ft) |
10200 ac-ft |
|
Surface Area (acres) |
0 acres |
|
River Name |
SOUTH FORK HESS CREEK |
|
Latitude |
65.5933 |
|
Longitude |
-148.392 |
|
Regulatory Agency(ies) |
AKDNR |
|
NID Number |
AK00017 |
|
Attachments |
Y |
