Haylodge #1 Reservoir Report
Nearby: Haylodge #2 Stanley Steamer
Last Updated: December 6, 2025
Haylodge #1 is a privately owned irrigation dam located in CHINOOK, Montana, along the HAY COULEE river.
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Summary
Built in 1939, this Earth dam stands at 30 feet tall and stretches 200 feet in length, with a storage capacity of 77 acre-feet. The dam is regulated by the Montana Department of Natural Resources and Conservation (DNRC), with state permitting, inspection, and enforcement in place to ensure its safety and compliance with regulations.
Despite its age, Haylodge #1 has a low hazard potential and has not been rated for its condition assessment. The dam serves a primary purpose of irrigation, supporting agricultural activities in the area. While no recent inspection or maintenance data is available, the dam's structure and functionality contribute to water resource management in the region. With its location in Congressional District 00, Montana, and under the jurisdiction of state regulatory agencies, Haylodge #1 plays a crucial role in sustaining water resources in Hill County.
As a key infrastructure supporting irrigation in the region, Haylodge #1 represents a significant piece of Montana's water management system. While its current condition assessment is not available, the dam's design, construction, and regulatory oversight ensure its continued operation for the benefit of local agricultural activities. With a focus on water resource conservation and climate resilience, the presence of dams like Haylodge #1 highlights the importance of sustainable water management practices in the face of changing environmental conditions.
Year Completed |
1939 |
Dam Length |
200 |
Dam Height |
30 |
River Or Stream |
HAY COULEE |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
77 |
Hazard Potential |
Low |
Nid Height |
30 |
Seasonal Comparison
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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.
Haylodge #1