|
Incident ID |
ID00180-3586 |
|
Dam Name |
PORTNEUF |
|
Downstream Hazard Potential |
H |
|
State |
ID |
|
Incident Date |
05/10/2023 |
|
Incident Type |
Non-failure |
|
Incident Driver |
Hydrologic/flooding |
|
Incident Mechanism 1 |
Spillway Erosion/head Cutting |
|
Incident Mechanism 2 |
Spillway Deficiency |
|
Incident Mechanism 3 |
|
|
Incident Description |
Spillway Failure-severe erosion of the emergency spillway downstream channel and associated
removal of soil materials beneath the existing concrete apron-Snowmelt resulting from above normal winter accumulation |
|
Named Hydrologic Event |
|
|
EAP Enacted (Y/N) due to Incident |
|
|
Fatalities (Number) |
|
|
Number of People Evacuated |
0 |
|
Number of Habitable Structures Evacuated |
|
|
Number of Habitable Structures Flooded |
|
|
Other Infrastructure Impacts |
|
|
Economic Damages (in $) |
|
|
Volume released at failure (ac-ft) |
|
|
Response |
|
|
Additional Remarks or Updates |
Minor Flooding of Farm Buildings and Non-Habitable Infrastructure |
|
Incident Time |
|
|
Incident Duration |
2 Days |
|
Incident Report Produced |
Yes |
|
Information Sources |
ID DWR |
|
Owner Type |
P |
|
Dam Type |
RE |
|
Primary Purpose(s) |
|
|
EAP |
Y |
|
Year Completed |
1912 |
|
Year Modified |
1949 |
|
Dam Height |
54 ft |
|
Max Storage (ac-ft) |
20504 ac-ft |
|
Surface Area (acres) |
1593 acres |
|
River Name |
PORTNEUF RIVER |
|
Latitude |
42.8787 |
|
Longitude |
-111.943 |
|
Regulatory Agency(ies) |
IDWR |
|
NID Number |
ID00180 |
|
Attachments |
Y |
