Lone Pine
Key Takeaway
Lone Pine is classified as low hazard in Arizona. It was completed in 1936 and is 90 years old. Its primary use is flood risk reduction.
Physical Details
| Dam Height | 98 ft (taller than 90.6% in AZ) |
| Dam Length | 900 ft |
| Dam Type | Earth |
| Max Storage | 14.7K acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 357 acres |
| Drainage Area | 183 sq mi |
| Max Discharge | 15,000 cfs |
| Year Completed | 1936 (90 years old) |
| NID ID | AZ00012 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
NAVAJO COUNTY
Local Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lone Pine?
Lone Pine is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lone Pine?
Lone Pine is owned by NAVAJO COUNTY (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lone Pine built?
Lone Pine was completed in 1936, making it 90 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 Lone Pine?
Lone Pine serves the following purposes: Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lone Pine?
Lone Pine has a dam height of 98 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 Lone Pine last inspected?
Lone Pine was last inspected on August 19, 2020. Inspection dates indicate when a formal review occurred, not the results of that inspection.