D'Andrea Detention Basin #1 Dam Reservoir Report
Last Updated: December 14, 2025
D'Andrea Detention Basin #1 Dam, located in Sparks, Nevada, is a privately owned structure designed by FPE Engineering for the primary purpose of flood risk reduction.
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Summary
This earth dam stands at a height of 21 feet with a hydraulic height of 25 feet, providing a maximum storage capacity of 71 acre-feet. With a spillway width of 50 feet and a maximum discharge of 1154 cubic feet per second, the dam serves to protect the surrounding area from potential flooding events along the North Truckee Drain-Tr.
Although the dam is state-regulated and inspected, its condition assessment is currently rated as poor, with a high hazard potential. The last inspection conducted in July 2021 revealed the need for maintenance and potential improvements to ensure the dam's structural integrity and safety. Despite its moderate risk assessment score of 3, it is essential for the owner to address the identified issues promptly to mitigate any potential risks and safeguard the community and environment from the impacts of a dam failure. For water resource and climate enthusiasts, monitoring the ongoing management and maintenance of D'Andrea Detention Basin #1 Dam is crucial to ensure its effectiveness in flood risk reduction and overall resilience in the face of changing climate conditions.
Dam Length |
1160 |
Dam Height |
21 |
River Or Stream |
NORTH TRUCKEE DRAIN-TR |
Primary Dam Type |
Earth |
Surface Area |
5.3 |
Hydraulic Height |
25 |
Drainage Area |
1.1 |
Nid Storage |
71 |
Structural Height |
21 |
Outlet Gates |
Uncontrolled - 1 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
25 |
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.
D'Andrea Detention Basin #1 Dam