Roberts Luman Draw Reservoir Report
Nearby: Griffith Stock Griffith
Last Updated: December 5, 2025
Roberts Luman Draw is a private earth dam located in Powder River, Montana, built in 1964 for water supply purposes along the Luman Draw river.
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Summary
The dam stands at a height of 28 feet with a hydraulic height of 23 feet and a length of 252 feet, providing a storage capacity of 45 acre-feet. Despite its small surface area of 3 acres and uncontrolled spillway type, the dam is classified as low hazard potential with a fair condition assessment as of April 2020.
Owned and regulated by the State of Wyoming, Roberts Luman Draw is subject to regular state inspections, permitting, and enforcement to ensure its safety and functionality. The dam's risk assessment indicates a moderate risk level, with a risk management plan potentially in place to address any identified vulnerabilities. With Liz Cheney serving as the Congressional Representative for the district covering the dam, stakeholders and water resource enthusiasts can stay updated on any developments related to Roberts Luman Draw through her office.
Overall, Roberts Luman Draw serves as a vital water resource infrastructure in Sheridan County, Wyoming, contributing to the local water supply and irrigation needs. Its historical significance and ongoing maintenance efforts underscore the importance of sustainable water management practices in the face of changing climate conditions. As the dam continues to play a crucial role in the region's water security, ongoing monitoring and risk assessment will be key to ensuring its long-term resilience and effectiveness.
Year Completed |
1964 |
Dam Length |
252 |
Dam Height |
28 |
River Or Stream |
LUMAN DRAW |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
23 |
Nid Storage |
45 |
Structural Height |
28 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Clear Creek Near Arvada
|
256cfs |
Powder River At Arvada
|
156cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Prairie Dog Creek Near Acme
|
19cfs |
Tongue River At State Line Nr Decker Mt
|
195cfs |
Piney Creek At Kearny
|
113cfs |
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.
Roberts Luman Draw