Elroy Reservoir Report
Nearby: Trudell #1 Leo
Last Updated: December 13, 2025
Elroy, a private water resource in Richland, Montana, is a crucial structure for fire protection, stock, and small fish pond purposes.
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Summary
Built in 1960, this earth dam stands at a height of 15 feet and has a storage capacity of 55 acre-feet, with a normal storage of 22 acre-feet. Located on Otis Creek in the city of NOHLY, Elroy serves as a vital resource for the local community, ensuring water availability for various needs.
Managed by the Montana Department of Natural Resources and Conservation (DNRC), Elroy is regulated, permitted, inspected, and enforced by the state. Despite its low hazard potential, the dam's condition assessment is currently not rated, highlighting the importance of regular inspections and maintenance to ensure its continued safety and functionality. With its location in a congressional district represented by Greg Gianforte (R), Elroy plays a key role in water resource management in the region.
While Elroy has not undergone recent modifications or assessments for risk management measures, it remains a critical infrastructure for water storage and distribution in the area. As a point of interest for water resource and climate enthusiasts, Elroy's role in providing essential services such as fire protection and stock pond supply showcases the significance of sustainable water management practices in the face of changing environmental conditions.
Year Completed |
1960 |
Dam Length |
250 |
Dam Height |
15 |
River Or Stream |
OTIS 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.
Elroy