Summary
Built in 1945, this irrigation structure stands at a height of 25 feet and has a storage capacity of 140 acre-feet. Despite its low hazard potential, Thoman is currently assessed as being in poor condition, with its last inspection dating back to July 2018. The dam features an uncontrolled spillway, with one valve serving as its outlet gate.
Thoman's primary purpose is irrigation, serving the surrounding agricultural lands in Lincoln County. While it is state-regulated and permitted, the dam's condition assessment and risk level indicate a need for maintenance and potential risk management measures. With a moderate risk level and a history of poor condition, Thoman presents an opportunity for stakeholders to address its structural and safety concerns to ensure the continued reliability of its irrigation function and minimize potential risks to downstream areas.
Year Completed |
1945 |
Dam Length |
560 |
Dam Height |
25 |
River Or Stream |
GOOSEBERRY CREEK |
Primary Dam Type |
Earth |
Surface Area |
19 |
Hydraulic Height |
20 |
Nid Storage |
140 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bear River Below Pixley Dam
|
1cfs |
Bear River Below Smiths Fork
|
271cfs |
Hams Fork Below Pole Creek
|
6cfs |
Bear River Below Reservoir
|
17cfs |
Big Creek Near Randolph
|
9cfs |
Bear River At Border
|
160cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Thoman