Negro Creek Dam Reservoir Report
Nearby: Fly Reservoir Dam Squaw Creek Dam
Last Updated: December 14, 2025
Negro Creek Dam, located in Washoe, Nevada, is a private dam that serves primarily for irrigation purposes.
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Summary
This Earth-type dam stands at 17 feet tall with a hydraulic height of 15 feet and a length of 1290 feet, creating a reservoir with a storage capacity of 1000 acre-feet. Despite its significant hazard potential and poor condition assessment, the dam is under state regulation, inspection, and enforcement by the Nevada Division of Water Resources.
The dam, situated on Negro Creek, poses a moderate risk due to its condition, prompting an inspection frequency of 3 years to ensure public safety. The spillway, with a width of 10 feet, is uncontrolled, and the dam features one slide (sluice gate) outlet gate. The dam's location in an area with a drainage area of 53 square miles highlights its importance for water resource management in the region.
While Negro Creek Dam faces challenges in its current condition, its role in irrigation and water storage underscores its significance for the local community. Efforts to address the dam's poor condition and mitigate potential risks are essential to ensuring the continued reliability and safety of this vital water resource infrastructure in Washoe, Nevada.
Dam Length |
1290 |
Dam Height |
17 |
River Or Stream |
NEGRO CREEK-OS |
Primary Dam Type |
Earth |
Surface Area |
100 |
Hydraulic Height |
15 |
Drainage Area |
53 |
Nid Storage |
1000 |
Structural Height |
17 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
17 |
Seasonal Comparison
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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.
Negro Creek Dam