State Line Detention Dam

OLNEY WELL DRAW· Greenlee, Arizona· Built 1952· Gravity·
Low Hazard Debris Control Federal Government

Key Takeaway

State Line Detention Dam is classified as low hazard in Arizona. It was completed in 1952 and is 74 years old. Its primary use is debris control.

Physical Details

Dam Length1,028 ft
Dam TypeGravity
Max Storage383 acre-ft
Normal Storage207 acre-ft
Surface Area30 acres
Drainage Area16 sq mi
Max Discharge4,104 cfs
Year Completed1952 (74 years old)
NID IDAZ20036

Safety Information

Low Hazard

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?

Emergency Action Plan: No
Last Inspection: August 15, 2013
State Regulated: No

Ownership

DOI BLM

Federal Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of State Line Detention Dam?

State Line Detention Dam 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 State Line Detention Dam?

State Line Detention Dam is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was State Line Detention Dam built?

State Line Detention Dam was completed in 1952, making it 74 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 State Line Detention Dam?

State Line Detention Dam serves the following purposes: Debris Control. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was State Line Detention Dam last inspected?

State Line Detention Dam was last inspected on August 15, 2013. Inspection dates indicate when a formal review occurred, not the results of that inspection.

Data from the National Inventory of Dams (NID) maintained by the US Army Corps of Engineers. Dam conditions may have changed since the last update. This site is not affiliated with USACE. Do not use for emergency planning — contact your local dam safety program.