Five Mile Erosion Contr Reservoir Report
Nearby: Nash Twin Lakes South
Last Updated: December 6, 2025
Five Mile Erosion Control, located in Idaho's Franklin County, is a privately-owned structure designed to mitigate erosion along the Five Mile Creek and Bear River.
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Summary
Built in 1952, this Earth dam stands at a height of 44.4 feet and has a storage capacity of 250 acre-feet. With a low hazard potential and satisfactory condition assessment, the dam has a controlled spillway with a width of 3 feet and a maximum discharge of 274 cubic feet per second.
Managed by the Idaho Department of Water Resources, Five Mile Erosion Control is regulated, permitted, inspected, and enforced by the state. The structure serves a primary purpose of erosion control and is made of stone core supported by rock and soil foundations. Despite its very high risk assessment due to the potential impact on surrounding areas, the dam's emergency action plan status and risk management measures are currently unknown. With a drainage area of 10.5 square miles and a surface area of 14 acres, this dam plays a crucial role in protecting the local environment and water resources.
Overall, Five Mile Erosion Control serves as a vital infrastructure piece in Idaho's water resource management, providing protection against erosion and ensuring the safety and stability of the surrounding areas. With its history dating back to the 1950s, this structure continues to play a significant role in safeguarding the local ecosystem and maintaining the integrity of the Five Mile Creek and Bear River watersheds. As climate change continues to impact water resources, the upkeep and maintenance of structures like Five Mile Erosion Control are essential in mitigating potential risks and preserving the natural environment for future generations.
Year Completed |
1952 |
Dam Length |
600 |
Dam Height |
44.4 |
River Or Stream |
FIVEMILE CREEK BEAR RIVER |
Surface Area |
14 |
Hydraulic Height |
37 |
Drainage Area |
10.5 |
Nid Storage |
250 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
44 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bear River At Idaho-Utah State Line
|
411cfs |
Logan River Above State Dam
|
100cfs |
Logan
|
0cfs |
Portneuf River At Topaz Id
|
128cfs |
Blacksmith Fork Ab U.P.&L. Co
|
60cfs |
Bear River At Pescadero
|
73cfs |
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 |
|---|---|---|
Third Creek Group Campground
|
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Dry Canyon Campground
|
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Dry Canyon
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Five Mile Erosion Contr