Rio Vista
Rio Vista is a dam located in Valley County, Idaho, built in 1971. It carries a Significant hazard potential classification and has a fair condition assessment.
About Rio Vista
The primary purpose of Rio Vista is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is private-owned. It impounds the Hyde Creek Salmon River near Payette River.
The dam stands 20 feet tall and stretches 700 feet across, creates a reservoir covering 11 acres, has a storage capacity of 41 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1971, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 09/25/2020.
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Location
| State | Idaho |
| County | Valley |
| Nearest City | Payette River |
| River/Stream | Hyde Creek Salmon River |
| Coordinates | 44.90460, -116.11540 |
Physical Characteristics
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 700 ft |
| Year Completed | 1971 (55 years old) |
Storage & Hydraulics
| NID Storage | 41 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 11 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 118 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Recreation |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 09/25/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00712 |
| Federal ID | ID00712 |
| More Info | State Dam Safety Program |