Koss #2 Reservoir Report
Nearby: R Ereaux #1 Stratton Reservoir
Last Updated: December 6, 2025
Koss #2 is a private earth dam located in Montana, specifically in Phillips County.
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Summary
Completed in 1955, this dam serves multiple purposes, including fire protection, stock watering, and as a small fish pond. With a height of 20 feet and a storage capacity of 77 acre-feet, Koss #2 is regulated by the Montana Department of Natural Resources and Conservation (DNRC) and is inspected regularly to ensure its safety and compliance with state regulations.
Situated on Telegraph Creek, Koss #2 has a low hazard potential and is currently rated as "Not Rated" in terms of its condition assessment. While the dam has not been modified in recent years and lacks certain features such as spillways and outlet gates, it continues to provide valuable water resources for the local area. The dam's emergency action plan (EAP) status, risk assessment, and management measures are currently not available, highlighting the need for further assessment and planning to ensure the safety and integrity of this important water infrastructure.
Overall, Koss #2 is an essential water resource in Montana, contributing to fire protection, livestock management, and recreational activities such as fishing. As climate change impacts water availability and quality, it is crucial to monitor and maintain dams like Koss #2 to safeguard our water resources for future generations. Collaborative efforts between private owners, state agencies, and the community are essential to ensure the resilience and sustainability of this vital water infrastructure in the face of evolving environmental challenges.
Year Completed |
1955 |
Dam Length |
180 |
Dam Height |
20 |
River Or Stream |
TR-TELEGRAPH CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
77 |
Hazard Potential |
Low |
Nid Height |
20 |
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.
Koss #2