Diamond A

COUGAR CREEK JARBIDGE RIVER· Owyhee, Idaho· Built 1931· 29 ft tall
Low Hazard Other Private

Key Takeaway

Diamond A is classified as low hazard in Idaho. It was completed in 1931 and is 95 years old. Its primary use is other.

Physical Details

Dam Height 29 ft (taller than 53.7% in ID)
Dam Length350 ft
Normal Storage3.9K acre-ft
Surface Area325 acres
Drainage Area31 sq mi
Max Discharge0 cfs
Year Completed1931 (95 years old)
NID IDID00083

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 1, 2018
State Regulated: Yes
Regulatory Agency: IDWR

Ownership

Private

Frequently Asked Questions

What is the hazard classification of Diamond A?

Diamond A 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 Diamond A?

Diamond A is owned by information not available (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.

When was Diamond A built?

Diamond A was completed in 1931, making it 95 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 Diamond A?

Diamond A serves the following purposes: Other. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.

How tall is Diamond A?

Diamond A has a dam height of 29 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 Diamond A last inspected?

Diamond A was last inspected on June 1, 2018. 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.