Larson (Garfield) Reservoir Report
Nearby: J Larson #2 Weeding #2
Last Updated: January 6, 2026
Larson (Garfield) is a private-owned irrigation dam located in Jordan, Montana, along the TR-SMOKY BUTTE CREEK.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1948 by the USDA NRCS, this Earth-type dam stands at 15 feet in height and spans 300 feet in length. With a storage capacity of 55 acre-feet, Larson (Garfield) serves the primary purpose of irrigation in the region, drawing water from a drainage area of 14.06 square miles.
Managed by the DNRC, Larson (Garfield) has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. While information on the structure's emergency action plan and risk assessment is not available, the dam has not undergone any recent modifications or inspections. Despite its age, Larson (Garfield) continues to play a vital role in water resource management in the area, showcasing the importance of maintaining and monitoring aging infrastructure for climate and water resource enthusiasts.
Situated in Congressional District 00, Montana, Larson (Garfield) stands as a testament to the enduring legacy of irrigation infrastructure in the region. As climate change continues to impact water resources, the importance of maintaining and assessing dams like Larson (Garfield) becomes increasingly crucial for ensuring sustainable water management practices in the face of evolving environmental challenges.
Year Completed |
1948 |
Dam Length |
300 |
Dam Height |
15 |
River Or Stream |
TR-SMOKY BUTTE CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
15 |
Drainage Area |
14.06 |
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.
Larson (Garfield)