Jordan Dam Reservoir Report
Last Updated: December 20, 2025
Jordan Dam, located in Valley County, Montana, is a federal gravity dam managed by the Bureau of Land Management.
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Summary
The dam, with a height of 16 feet and a hydraulic height of 12 feet, was completed with a primary purpose that is currently unspecified. It has a storage capacity of 76.52 acre-feet, with a normal storage level of 36.64 acre-feet, covering a surface area of 18.53 acres and serving a drainage area of 0.5 square miles.
Despite its low hazard potential, Jordan Dam has an unsatisfactory condition assessment and is in need of regular inspections due to its moderate risk level. The dam features an uncontrolled spillway and is situated on an intermittent river or stream. With a history of inspection dating back to October 2017, the dam is in need of ongoing risk management measures to ensure its safety and stability. Overall, Jordan Dam presents an intriguing case study for water resource and climate enthusiasts, highlighting the complexities of managing and maintaining critical infrastructure in the face of changing environmental conditions.
Dam Length |
492 |
River Or Stream |
INTERMITTENT |
Primary Dam Type |
Gravity |
Surface Area |
18.53 |
Hydraulic Height |
12 |
Drainage Area |
0.5 |
Nid Storage |
76.52 |
Structural Height |
16 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Jordan Dam