Coleman Reservoir Dam Reservoir Report
Nearby: Little Valley Dam Toney Reservoir Dam
Last Updated: December 13, 2025
The Coleman Reservoir Dam, located in Washoe, Nevada, serves as a vital water resource for irrigation purposes in the region.
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Summary
This private-owned earth dam stands at a height of 23 feet and has a storage capacity of 450 acre-feet, with a normal storage capacity of 300 acre-feet. The dam, built on Coleman Creek, is regulated by the Nevada Department of Water Resources and undergoes regular inspections to ensure its safety and functionality.
Despite its low hazard potential, the Coleman Reservoir Dam is rated as having a poor condition assessment as of July 2017. The dam features an uncontrolled spillway and one slide (sluice gate) outlet gate. Although the risk assessment deems the dam's risk level as moderate, there is a lack of detailed information on specific risk management measures in place. The dam's location and purpose make it a crucial infrastructure for sustaining agricultural activities and providing fire protection, stock watering, and small fish pond maintenance in the area.
Overall, the Coleman Reservoir Dam stands as a significant piece of infrastructure in the region, ensuring water availability for irrigation and other essential purposes. As water resource and climate enthusiasts, understanding the condition and functioning of such dams is crucial for preserving water security and resilience in the face of changing climatic conditions. Continued monitoring and maintenance of the Coleman Reservoir Dam will be vital to safeguard its structural integrity and prevent potential hazards to the surrounding community and environment.
Dam Length |
100 |
Dam Height |
23 |
River Or Stream |
COLEMAN CREEK |
Primary Dam Type |
Earth |
Surface Area |
30 |
Hydraulic Height |
20 |
Drainage Area |
90 |
Nid Storage |
450 |
Structural Height |
23 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
23 |
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.
Coleman Reservoir Dam
Twelvemile Creek