San Simon Fan Drop Structure Detention Dam

SAN SIMON RIVER· Graham, Arizona· Built 1953· Gravity·
Low Hazard Fish And Wildlife Pond Federal Government

Key Takeaway

San Simon Fan Drop Structure Detention Dam is classified as low hazard in Arizona. It was completed in 1953 and is 73 years old. Its primary use is fish and wildlife pond.

Physical Details

Dam Length4,300 ft
Dam TypeGravity
Max Storage900 acre-ft
Normal Storage3.4K acre-ft
Surface Area594 acres
Max Discharge1,215 cfs
Year Completed1953 (73 years old)
NID IDAZ20026

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: June 9, 2009
State Regulated: No

Ownership

DOI BLM

Federal Government

Nearby Dams

Frequently Asked Questions

What is the hazard classification of San Simon Fan Drop Structure Detention Dam?

San Simon Fan Drop Structure 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 San Simon Fan Drop Structure Detention Dam?

San Simon Fan Drop Structure Detention Dam is owned by DOI BLM (Federal Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was San Simon Fan Drop Structure Detention Dam built?

San Simon Fan Drop Structure Detention Dam was completed in 1953, making it 73 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 San Simon Fan Drop Structure Detention Dam?

San Simon Fan Drop Structure Detention Dam serves the following purposes: Fish And Wildlife Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

When was San Simon Fan Drop Structure Detention Dam last inspected?

San Simon Fan Drop Structure Detention Dam was last inspected on June 9, 2009. 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.