Lebanon Reservoir #1 (Upper)
Key Takeaway
Lebanon Reservoir #1 (Upper) is classified as significant hazard in Arizona. It was completed in 1910 and is 116 years old. Its primary use is irrigation. Significant hazard means failure could cause economic or environmental damage. Learn more.
Physical Details
| Dam Height | 40 ft (taller than 68.4% in AZ) |
| Dam Length | 570 ft |
| Dam Type | Earth |
| Max Storage | 147 acre-ft |
| Normal Storage | 115 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 210 cfs |
| Year Completed | 1910 (116 years old) |
| NID ID | AZ00054 |
Safety Information
No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
ARIZONA STATE LAND DEPARTMENT;LEBANON RESERVOIR & DITCH CO.
Private
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High Hazard 33 ftFrequently Asked Questions
What is the hazard classification of Lebanon Reservoir #1 (Upper)?
Lebanon Reservoir #1 (Upper) is classified as Significant Hazard. No probable loss of human life, but can cause economic loss, environmental damage, or disruption of lifeline facilities. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lebanon Reservoir #1 (Upper)?
Lebanon Reservoir #1 (Upper) is owned by ARIZONA STATE LAND DEPARTMENT;LEBANON RESERVOIR & DITCH CO. (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lebanon Reservoir #1 (Upper) built?
Lebanon Reservoir #1 (Upper) was completed in 1910, making it 116 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Lebanon Reservoir #1 (Upper)?
Lebanon Reservoir #1 (Upper) serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lebanon Reservoir #1 (Upper)?
Lebanon Reservoir #1 (Upper) has a dam height of 40 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Lebanon Reservoir #1 (Upper) last inspected?
Lebanon Reservoir #1 (Upper) was last inspected on December 17, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.