Fuddy Duddy Reservoir Report
Nearby: Little Phantom Deuteronomy
Last Updated: December 5, 2025
Located in Big Sandy, Montana, Fuddy Duddy is a privately owned earth dam completed in 1900 with a primary purpose of providing fire protection, stock, or a small fish pond.
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Summary
Situated on Cut Bank Creek, this dam has a height of 12 feet and a length of 660 feet, with a storage capacity of 137 acre-feet. Although its hazard potential is rated as low and its condition is not yet assessed, Fuddy Duddy is regulated by the Montana Department of Natural Resources and Conservation, with state jurisdiction and permitting in place for inspection and enforcement.
The dam's design and construction are not attributed to any federal agencies, and it does not receive any federal funding or oversight. Congressman Greg Gianforte represents the area in Congressional District 00, Montana, where Fuddy Duddy serves as a crucial water resource for fire protection and livestock needs. With a surface area of 8 acres and normal storage capacity of 10 acre-feet, this dam plays a vital role in the local ecosystem and water management efforts.
Despite its age of over a century, Fuddy Duddy continues to be a reliable asset for the community, with no documented modifications or assessments as of yet. Its low hazard potential suggests a minimal risk of failure, but the lack of a condition assessment and emergency action plan highlights the importance of ongoing monitoring and maintenance to ensure the safety and efficiency of this essential water infrastructure.
Year Completed |
1900 |
Dam Length |
660 |
Dam Height |
12 |
River Or Stream |
CUT BANK CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
12 |
Nid Storage |
137 |
Hazard Potential |
Low |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Judith River Nr Mouth
|
368cfs |
Missouri River At Virgelle Mt
|
4290cfs |
Teton River At Loma Mt
|
30cfs |
Missouri River At Fort Benton Mt
|
4720cfs |
Marias River Near Loma Mt
|
335cfs |
Missouri River Near Great Falls Mt
|
3530cfs |
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.
Fuddy Duddy