Neiser #1 Reservoir Report
Nearby: Dewey Cornhuskers
Last Updated: December 20, 2025
Neiser #1 is a state-regulated irrigation dam located in Medicine Lake, Montana, on Neiser Creek.
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Summary
Completed in 1936, this earth dam stands at 35 feet high and spans 300 feet in length, with a storage capacity of 314 acre-feet. The dam is managed by the Montana Department of Natural Resources and Conservation (DNRC) and is designed to support agricultural irrigation in the area.
Despite its age, Neiser #1 is classified as having a low hazard potential, with a condition assessment of "Not Rated." The dam has not been inspected in recent years, and its emergency action plan (EAP) status is currently unknown. The surrounding area is at low risk for inundation, with no detailed risk assessment or management measures in place. Overall, Neiser #1 serves as a critical infrastructure for water resource management in the region, highlighting the importance of continued monitoring and maintenance to ensure its long-term functionality and safety in the face of changing climate conditions.
Year Completed |
1936 |
Dam Length |
300 |
Dam Height |
35 |
River Or Stream |
NEISER CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
35 |
Nid Storage |
314 |
Hazard Potential |
Low |
Nid Height |
35 |
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.
Neiser #1