Valley Dam Reservoir Report
Nearby: Half Barrel Detention Dam Desert
Last Updated: December 21, 2025
Valley Dam, located in Valley, Montana, is a federal-owned structure managed by the Bureau of Land Management.
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Summary
This gravity dam stands at a structural height of 29 feet with a hydraulic height of 24 feet, providing a storage capacity of 56.27 acre-feet. The dam, constructed of buttress and stone, serves as a crucial water resource in the area, regulating an intermittent river or stream with a drainage area of 2.1 square miles.
Despite its low hazard potential, Valley Dam has not been rated for its condition as of the last inspection in October 2017. The dam, with a length of 223 feet and surface area of 12.05 acres, plays a vital role in water management and conservation efforts in the region. While the dam has not been modified in recent years, regular inspections are carried out every five years to ensure its structural integrity and safety.
Valley Dam's primary purpose and associated structures are unspecified, but its significance in water resource management cannot be overstated. With its federal ownership and regulatory oversight, the dam continues to contribute to the sustainable use of water in Valley, Montana, under the stewardship of the Bureau of Land Management. As a gravity dam with historical significance and a stable operational status, Valley Dam remains a critical infrastructure for climate and water resource enthusiasts to monitor and appreciate.
Dam Length |
223 |
River Or Stream |
INTERMITTENT |
Primary Dam Type |
Gravity |
Surface Area |
12.05 |
Hydraulic Height |
24 |
Drainage Area |
2.1 |
Nid Storage |
56.27 |
Structural Height |
29 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
29 |
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.
Valley Dam