Sidehill Detention Basin Dam Reservoir Report
Last Updated: December 21, 2025
Sidehill Detention Basin Dam, located in Sparks, Nevada, was completed in 1998 with the primary purpose of flood risk reduction along the Sun Valley Creek.
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Summary
This earth dam stands at 14 feet high with a hydraulic height of 12 feet and a length of 200 feet, providing a maximum storage capacity of 71 acre-feet. Despite its significant hazard potential, the dam's condition assessment is currently poor, indicating a need for maintenance and improvement to ensure its effectiveness in managing flood risks in the region.
The dam features an uncontrolled spillway with a width of 40 feet and an outlet gate for water release. The inspection frequency is set at every three years, with the last assessment conducted in June 2021. The risk assessment for Sidehill Detention Basin Dam is moderate, suggesting a need for proactive risk management measures to mitigate potential hazards. With its location in Washoe County, Nevada, and its critical role in flood risk reduction, this dam serves as a vital infrastructure for water resource and climate enthusiasts to monitor and support for the safety and protection of the surrounding community.
Year Completed |
1998 |
Dam Length |
200 |
Dam Height |
14 |
River Or Stream |
SUN VALLEY CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
7.1 |
Hydraulic Height |
12 |
Drainage Area |
1.1 |
Nid Storage |
71 |
Structural Height |
14 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
14 |
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.
Sidehill Detention Basin Dam