Munsee Reservoir Report
Nearby: Salmon Falls Creek Kinyon Pond Dam
Last Updated: December 16, 2025
Munsee is a privately owned dam located in Twin Falls, Idaho, along an unnamed stream and Salmon Falls Creek.
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Summary
Built in 1977 for irrigation purposes, this earth dam stands at a height of 22.8 feet with a storage capacity of 90 acre-feet. The dam's spillway is of the controlled type, ensuring regulated water release when necessary.
Despite its low hazard potential and fair condition assessment, Munsee poses a very high risk, with a risk assessment rating of 1. While the dam has been inspected periodically, the last assessment took place in May 2018. The dam's emergency action plan status and risk management measures remain unclear, raising concerns for potential issues that may arise in the future. For water resource and climate enthusiasts, monitoring Munsee and advocating for proper maintenance and risk mitigation strategies is crucial to ensure the safety and sustainability of this irrigation infrastructure in Idaho.
Year Completed |
1977 |
Dam Length |
750 |
Dam Height |
22.8 |
River Or Stream |
UNNAMED STREAM SALMON FALLS CREEK |
Surface Area |
12 |
Hydraulic Height |
17.7 |
Drainage Area |
1.9 |
Nid Storage |
90 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
23 |
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.
Munsee
Box Canyon