Summary
Completed in 1948, this earth dam stands at a height of 25.4 meters and has a normal storage capacity of 350 acre-feet, serving an area of 45 acres. With a significant hazard potential and a fair condition assessment, Mcmullen is subject to regular inspections by the Idaho Department of Water Resources to ensure its safety and integrity.
The dam features a controlled spillway with a width of 111 feet and a maximum discharge capacity of 370 cubic feet per second. Despite its age, Mcmullen has been maintained to meet state regulations and undergoes inspections every four years. The risk assessment for this dam is classified as very high, emphasizing the importance of risk management measures to mitigate potential hazards and ensure the safety of downstream communities and infrastructure.
Located in Twin Falls County, Mcmullen's strategic position and function in irrigation highlight its significance in water resource management in the region. With its historical legacy and ongoing maintenance efforts, this dam serves as a critical infrastructure asset for agricultural activities in the area, demonstrating the intersection of water resource management and climate resilience in Idaho's landscape.
Year Completed |
1948 |
Dam Length |
1850 |
Dam Height |
25.4 |
River Or Stream |
COTTONWOOD CREEK ROCK CREEK |
Surface Area |
45 |
Hydraulic Height |
21.8 |
Drainage Area |
31 |
Nid Storage |
350 |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
25 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Schipper Campground
|
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Schipper
|
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Rock Creek Co Park
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Mcmullen