Spear #1 Reservoir Report
Nearby: A Irion #1 Landa #2
Last Updated: December 6, 2025
Spear #1 is a private earth dam located in Powder River, Montana, along the TR-SHEEP CREEK.
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Summary
Built in 1954, this dam serves multiple purposes including fire protection, stock, and as a small fish pond, with a storage capacity of 83 acre-feet. With a height of 15 feet and a length of 150 feet, Spear #1 has a low hazard potential and is regulated by the Montana Department of Natural Resources and Conservation (DNRC). The dam has not been rated for its condition assessment, but it undergoes regular inspections and is equipped with emergency action plans.
Situated in Congressional District 00 of Montana, Spear #1 plays a crucial role in water resource management in the region. The dam's primary owner is private, and it is not funded or managed by federal agencies. Despite its modest size, Spear #1 contributes to the overall water supply and ecosystem health in the area. With its strategic location and purposeful design, the dam provides essential services to local communities and wildlife, highlighting the importance of small-scale water infrastructure in sustaining the environment amidst changing climate patterns.
As an integral part of the local water infrastructure, Spear #1 serves as a testament to the collaborative efforts between private owners and state regulatory agencies in ensuring water security and safety. With its history dating back to the mid-20th century, the dam stands as a symbol of resilience and adaptability in the face of evolving environmental challenges. Its presence along TR-SHEEP CREEK not only supports fire protection and livestock needs but also contributes to the conservation of aquatic habitats, making it a valuable asset for water resource and climate enthusiasts seeking sustainable solutions for water management in the region.
Year Completed |
1954 |
Dam Length |
150 |
Dam Height |
15 |
River Or Stream |
TR-SHEEP CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
83 |
Hazard Potential |
Low |
Nid Height |
15 |
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.
Spear #1