Peterson #1 Reservoir Report
Nearby: Mcferran #3 Mcferran #2
Last Updated: December 5, 2025
Peterson #1, located in Pompeys Pillar, Montana, is a privately owned earth dam completed in 1958 for fire protection, stock, and small fish pond purposes.
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Summary
Standing at a height of 16 feet with a length of 325 feet, this dam has a storage capacity of 80 acre-feet, with a normal storage level of 34 acre-feet. Situated on TR-FLY Creek, the dam serves as a crucial water resource in Big Horn County, Montana, ensuring water availability for various uses in the region.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Peterson #1 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. While the dam has not been inspected recently and lacks an Emergency Action Plan (EAP), it continues to play a vital role in water management and conservation efforts in the area. With its strategic location and purposeful design, Peterson #1 stands as a testament to the importance of sustainable water resource management in the face of changing climate patterns.
As climate enthusiasts and water resource advocates continue to monitor the impact of climate change on water availability and quality, structures like Peterson #1 serve as essential components of the local water infrastructure. While the dam's condition assessment remains pending and updates on emergency preparedness are needed, its role in providing water for fire protection, livestock, and aquatic life underscores the significance of proactive water management practices in the region. As discussions on climate resilience and water resource sustainability gain momentum, Peterson #1 stands as a tangible example of the interconnectedness between water resources, infrastructure, and climate adaptation strategies.
Year Completed |
1958 |
Dam Length |
325 |
Dam Height |
16 |
River Or Stream |
TR-FLY CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
80 |
Hazard Potential |
Low |
Nid Height |
16 |
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.
Peterson #1