Alay #1 Reservoir Report
Nearby: Alay #2 Haglof Reservoir
Last Updated: December 6, 2025
Alay #1 is a privately owned earthen dam located in Garfield, Montana, along the TR-WALL CREEK river or stream.
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Summary
Completed in 1950, the dam stands at a height of 15 feet and has a storage capacity of 55 acre-feet, with a primary purpose of providing fire protection, stock water, or serving as a small fish pond. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with regular inspections and enforcement measures in place to ensure its safety and compliance with state regulations.
With a low hazard potential and a condition assessment that is currently not rated, Alay #1 serves as a vital resource for water management in the area. While the dam does not have a designated Emergency Action Plan (EAP) or inundation maps prepared, it meets state permitting and inspection requirements. The dam also falls under the jurisdiction of the Omaha District of the US Army Corps of Engineers, with Congressman Greg Gianforte representing the area in Congressional District 00, Montana.
For water resource and climate enthusiasts, Alay #1 presents an interesting case study of a small-scale dam that plays a crucial role in providing water for various purposes in a rural setting. The dam's location and design reflect its importance in supporting local agriculture and fire protection efforts, highlighting the intricate balance between water management and environmental conservation. As efforts to address climate change intensify, understanding the role of dams like Alay #1 in sustaining water resources becomes increasingly relevant for ensuring the resilience of communities and ecosystems in the face of evolving environmental challenges.
Year Completed |
1950 |
Dam Length |
150 |
Dam Height |
15 |
River Or Stream |
TR-WALL CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Nid Storage |
55 |
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.
Alay #1