Hannaland Reservoir Reservoir Report
Nearby: Hannaland #1 Murphy And Sons #2
Last Updated: December 6, 2025
Hannaland Reservoir, located in McCone County, Montana, is a privately owned water resource built in 1959 primarily for fire protection, stock, and small fish pond purposes.
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Summary
The reservoir, with a dam height of 20 feet and a volume of 103 acre-feet, is situated along Soda Creek and serves as a vital source of water for the local community. The structure is under the regulatory oversight of the Montana Department of Natural Resources and Conservation (DNRC), ensuring proper permitting, inspection, and enforcement protocols are in place to maintain its integrity.
With a low hazard potential and a condition assessment of "Not Rated," Hannaland Reservoir presents a reliable and secure water storage solution for the region. While the reservoir does not have a designated spillway type or surface area, its normal storage capacity of 53 acre-feet guarantees a steady supply of water for its intended purposes. The reservoir's location, at coordinates 47.3453° N, -106.0152° W, makes it easily accessible for monitoring and maintenance, contributing to its overall operational efficiency and safety.
In the event of an emergency, the reservoir's management team is expected to have an emergency action plan (EAP) in place, although specific details on the plan's preparedness and guidelines adherence are currently unavailable. Despite this, Hannaland Reservoir remains a crucial water resource in the region, serving the community's needs for fire protection, livestock, and recreational fishing activities. Its strategic location and regulatory compliance underscore its importance in water resource management and climate resilience efforts in Montana.
Year Completed |
1959 |
Dam Length |
400 |
Dam Height |
20 |
River Or Stream |
SODA CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
103 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nelson Creek Near Van Norman Mt
|
33cfs |
Redwater River At Circle Mt
|
4cfs |
Missouri River Near Wolf Point Mt
|
5020cfs |
Milk River At Nashua Mt
|
233cfs |
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.
Hannaland Reservoir