Rio Vista

HYDE CREEK SALMON RIVER· Valley, Idaho· Built 1971· 20 ft tall
Significant Hazard Recreation Private

Key Takeaway

Rio Vista is classified as significant hazard in Idaho. It was completed in 1971 and is 55 years old. Its primary use is recreation. Significant hazard means failure could cause economic or environmental damage. Learn more.

Physical Details

Dam Height 20 ft (taller than 28% in ID)
Dam Length700 ft
Normal Storage41 acre-ft
Surface Area11 acres
Drainage Area0 sq mi
Max Discharge118 cfs
Year Completed1971 (55 years old)
Year Modified1981
NID IDID00712

Safety Information

Significant Hazard

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?

Emergency Action Plan: No
Last Inspection: September 25, 2020
State Regulated: Yes
Regulatory Agency: IDWR

Ownership

Private

Nearby Dams

Payette Lake

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J-Ditch Effluent Lagoon

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Little Payette Lake Main

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Knox Meadow

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Blackhawk Lake

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Little Payette Lake Dike

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Hancock

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Hollenbeak

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Frequently Asked Questions

What is the hazard classification of Rio Vista?

Rio Vista 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 Rio Vista?

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

When was Rio Vista built?

Rio Vista was completed in 1971, making it 55 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 Rio Vista?

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

How tall is Rio Vista?

Rio Vista has a dam height of 20 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 Rio Vista last inspected?

Rio Vista was last inspected on September 25, 2020. 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.