Willow Creek Bor Mt - Dike 3 Reservoir Report
Last Updated: December 5, 2025
Willow Creek Bor Mt - Dike 3, located in Lewis and Clark County, Montana, is a Federal-owned earth dam completed in 1941 by the Bureau of Reclamation.
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Summary
Standing at a height of 3 feet and a length of 70 feet, this structure plays a crucial role in managing the flow of Willow Creek. With a storage capacity of 39,800 acre-feet, it serves as a vital water resource in the region.
Despite its age, the dam's hazard potential is classified as high, highlighting the importance of regular inspections and maintenance. The last inspection took place in June 2020, with a scheduled frequency of once per year. While the condition assessment is not currently available, the Bureau of Reclamation is responsible for regulating, inspecting, and operating this key infrastructure.
Given its significance in water management and flood control, Willow Creek Bor Mt - Dike 3 underscores the ongoing need for monitoring and risk management measures. With its association with three other structures and its location within the Walla Walla District, this dam remains a critical component of the region's water infrastructure.
Year Completed |
1941 |
Dam Length |
70 |
Dam Height |
3 |
River Or Stream |
WILLOW CREEK |
Primary Dam Type |
Earth |
Nid Storage |
39800 |
Structural Height |
3 |
Hazard Potential |
High |
Nid Height |
3 |
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 |
|---|---|---|
Willow Creek FAS
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Nilan Reservoir FAS
|
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Pishkun Reservoir FAS
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Willow Creek Bor Mt - Dike 3