A J Tillman #2 Reservoir Report
Nearby: Mr Flaming Jet Little
Last Updated: December 6, 2025
A J Tillman #2 is a privately owned earth dam located in Zurich, Montana, on Coal Coulee.
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Summary
Built in 1930, this dam serves multiple purposes including fire protection, stock watering, and a small fish pond. With a height of 18 feet and a length of 400 feet, the dam has a storage capacity of 63 acre-feet, with a normal storage level of 24 acre-feet.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), A J Tillman #2 is regulated, permitted, inspected, and enforced by the state. Despite being rated as having a low hazard potential and not yet assessed for condition, the dam remains an essential water resource in the area. Its location in a congressional district represented by Greg Gianforte (R) highlights its significance in the local community.
For water resource and climate enthusiasts, A J Tillman #2 offers a fascinating glimpse into the history and management of water infrastructure in rural Montana. Its multi-purpose design and state-regulated status make it a valuable asset for fire protection, livestock, and conservation efforts in the region. As an earth dam with a low hazard potential, A J Tillman #2 represents a balance between human needs and environmental stewardship, showcasing the importance of sustainable water resource management in the face of climate change challenges.
Year Completed |
1930 |
Dam Length |
400 |
Dam Height |
18 |
River Or Stream |
COAL COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
63 |
Hazard Potential |
Low |
Nid Height |
18 |
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.
A J Tillman #2