Olive Oil Reservoir Report
Nearby: Tiger #2 Anderson Reservoir
Last Updated: December 5, 2025
Located in Dodson, Montana, Olive Oil is a privately owned earth dam completed in 1950 for fire protection, stock, or small fish pond purposes.
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Summary
With a height of 22 feet and a length of 200 feet, Olive Oil has a storage capacity of 194 acre-feet and a normal storage level of 125 acre-feet. The dam is situated on Fogerty Coulee, under the jurisdiction of the state regulatory agency DNRC, and falls within Congressional District 00, Montana represented by Greg Gianforte.
Despite being classified as having low hazard potential and not rated in terms of condition assessment, Olive Oil is subject to state permitting, inspection, and enforcement. The dam is designed to serve as a crucial water source for fire protection and livestock in the surrounding area. While the structure has not been modified in recent years and lacks detailed risk assessment and emergency preparedness measures, its presence highlights the importance of water resource management in mitigating climate-related challenges in the region. Enthusiasts of water resources and climate resilience can find valuable insights in Olive Oil's role in maintaining water security and ecosystem health in Blaine County, Montana.
Year Completed |
1950 |
Dam Length |
200 |
Dam Height |
22 |
River Or Stream |
FOGERTY COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
194 |
Hazard Potential |
Low |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Peoples Creek Near Hays Mt
|
4cfs |
Milk River Near Harlem Mt
|
69cfs |
Milk River Near Dodson Mt
|
68cfs |
Battle Creek Near Chinook Mt
|
12cfs |
Clear Creek Near Chinook Mt
|
21cfs |
Missouri River Near Landusky Mt
|
9100cfs |
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.
Olive Oil