Us#13 Dam Reservoir Report
Nearby: Big Timber #5 Schlesinger #3
Last Updated: December 6, 2025
Us#13 Dam, located in Rosebud, Montana, is a federal-owned gravity dam on an unnamed drainage, managed by the Bureau of Land Management.
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Summary
With a hydraulic height of 20 feet and a structural height of 26 feet, the dam has a storage capacity of 63.9 acre-feet, serving a drainage area of 5 square miles. Despite its low hazard potential, the dam's condition assessment is currently marked as "Not Rated," indicating a need for further evaluation.
The dam, standing at 521 feet in length, was last inspected in September 2018 with an inspection frequency of 5 years. Although its primary purpose is unspecified, the dam's core structure consists of buttress and stone materials. The surrounding area covers approximately 9.4 acres, providing essential water resource management within the region. As a key infrastructure managed by the Bureau of Land Management, Us#13 Dam plays a crucial role in regulating water flow and storage in the area, contributing to the overall environmental and climate resilience of the region.
Dam Length |
521 |
River Or Stream |
UNNAMED DRAINAGE |
Primary Dam Type |
Gravity |
Surface Area |
9.4 |
Hydraulic Height |
20 |
Drainage Area |
5 |
Nid Storage |
63.9 |
Structural Height |
26 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
26 |
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.
Us#13 Dam