Hill Number 2 Dam Reservoir Report
Last Updated: December 13, 2025
Hill Number 2 Dam, located in Washoe County, Nevada, serves primarily for irrigation purposes, with additional functions for fire protection, stock watering, and small fish pond management.
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Summary
The dam, completed in 1974, stands at a height of 27 feet and has a storage capacity of 240 acre-feet. The dam is constructed with earth and stone materials, with a spillway width of 15 feet for controlled water release.
Despite being privately owned, the Hill Number 2 Dam is regulated and inspected by the Nevada Division of Water Resources to ensure its safety and compliance with state standards. The dam has a low hazard potential and is in fair condition, with a moderate risk assessment rating. The last inspection in October 2020 confirmed the dam's structural integrity and functionality, with emergency preparedness measures being assessed for future improvements. Water resource and climate enthusiasts can appreciate the sustainable management of this dam for agricultural and environmental benefits in the region.
Years Modified |
1975 - Structural |
Year Completed |
1974 |
Dam Length |
400 |
Dam Height |
27 |
River Or Stream |
UNNAMED WASH |
Primary Dam Type |
Earth |
Surface Area |
14.9 |
Hydraulic Height |
23 |
Drainage Area |
0.2 |
Nid Storage |
240 |
Structural Height |
29 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sf Pit R Nr Likely Ca
|
7cfs |
Mahogany Creek Near Summit Lake
|
2cfs |
Pit R Nr Canby Ca
|
63cfs |
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.
Hill Number 2 Dam