Hannaland #1 Reservoir Report
Last Updated: December 5, 2025
Hannaland #1 is a privately owned earth dam located in McCone, Montana, along the TR-Timber Creek.
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Summary
Completed in 1944, this dam stands at a height of 25 feet and serves multiple purposes including fire protection, stock, and small fish pond operations. With a maximum storage capacity of 93 acre-feet and a normal storage level of 55 acre-feet, this dam plays a crucial role in water resource management in the area.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Hannaland #1 has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. Despite not having been inspected in recent years, the dam is still regulated, permitted, inspected, and enforced by the state agency. With its strategic location and purpose, Hannaland #1 continues to contribute to the overall water management efforts in the region.
For water resource and climate enthusiasts, Hannaland #1 represents a fascinating case study in dam infrastructure and its role in supporting various water-related activities. As a key feature in the local landscape, this earth dam serves as a vital resource for fire protection, livestock, and recreational purposes. With its historical significance dating back to the mid-20th century, Hannaland #1 highlights the importance of sustainable water management practices in ensuring the resilience of water resources in the face of changing environmental conditions.
Year Completed |
1944 |
Dam Length |
150 |
Dam Height |
25 |
River Or Stream |
TR-TIMBER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
93 |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nelson Creek Near Van Norman Mt
|
33cfs |
Redwater River At Circle Mt
|
4cfs |
Milk River At Nashua Mt
|
233cfs |
Missouri River Near Wolf Point Mt
|
5020cfs |
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 #1