Lone Tree Section 23 Tails Dam Reservoir Report
Last Updated: December 14, 2025
Located in Humboldt, Nevada, the Lone Tree Section 23 Tails Dam is a privately owned structure designed for flood risk reduction along the Humboldt River.
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Summary
Completed in 1996, this earth dam stands at a height of 180 feet with a length of 9622 feet, providing storage capacity of 20,040 acre-feet. The dam's primary purpose is flood risk reduction, serving as a crucial component for managing water resources in the region.
Despite its significant hazard potential and poor condition assessment, the Lone Tree Section 23 Tails Dam has undergone multiple modifications over the years to enhance its hydraulic and structural integrity. The dam is regulated by the Nevada Department of Water Resources and undergoes regular inspections to ensure its continued safety and functionality. With no spillway in place, the dam's outlet gates play a vital role in managing water levels and mitigating flood risks for the surrounding area.
As a key infrastructure for water resource management in Humboldt County, the Lone Tree Section 23 Tails Dam serves as a critical flood control measure along the Humboldt River. With its storage capacity, structural design, and regulatory oversight, the dam plays a crucial role in protecting nearby communities and infrastructure from the impacts of potential flooding events. Ongoing risk assessments and management measures are essential to ensure the long-term effectiveness and safety of this essential water resource structure.
Years Modified |
2001 - Hydraulic, 2001 - Structural, 2002 - Hydraulic, 2002 - Structural, 2003 - Hydraulic, 2003 - Structural |
Year Completed |
1996 |
Dam Length |
9622 |
Dam Height |
180 |
River Or Stream |
HUMBOLDT RIVER-OS |
Primary Dam Type |
Earth |
Surface Area |
245 |
Hydraulic Height |
177 |
Drainage Area |
0.4 |
Nid Storage |
20040 |
Structural Height |
180 |
Outlet Gates |
Other Controlled - 1 |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
180 |
Seasonal Comparison
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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.
Lone Tree Section 23 Tails Dam