Jonas #6 Reservoir Report
Nearby: Dwarf Twin Forks (Dawson)
Last Updated: December 6, 2025
Jonas #6 is a private earth dam located in Dawson County, Montana, specifically in the city of Intake along TR-Glendive Creek.
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Summary
Completed in 1968, the dam serves multiple purposes including fire protection, stock, and small fish pond management. With a height of 20 feet and a storage capacity of 269 acre-feet, the dam plays a crucial role in water resource management in the area.
Despite its low hazard potential, Jonas #6 is regulated by the Montana Department of Natural Resources and Conservation (DNRC) with state jurisdiction and permitting. The dam has not been rated for its condition assessment, but it undergoes regular state inspections and enforcement to ensure its structural integrity and safety. With a normal storage capacity of 92 acre-feet, the dam provides essential water resources for local fire protection and agricultural activities.
Located in Congressional District 00, Montana, Jonas #6 is overseen by private owners and stands as a testament to sustainable water management practices in the region. The dam's strategic location along TR-Glendive Creek and its multi-purpose functionality highlight the importance of small-scale water infrastructure in mitigating climate change impacts and supporting local communities.
Year Completed |
1968 |
Dam Length |
150 |
Dam Height |
20 |
River Or Stream |
TR-GLENDIVE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
269 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yellowstone River At Glendive Mt
|
6000cfs |
Beaver Creek Nr Trotters
|
0cfs |
Little Missouri River At Medora
|
64cfs |
Little Missouri River At Marmarth
|
12cfs |
Deep Creek Nr Amidon
|
0cfs |
Powder River Near Locate Mt
|
231cfs |
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.
Jonas #6