Warren Diversion
Warren Diversion is a dam located in Valley County, Idaho, built in 1924. It carries a Significant hazard potential classification and has a fair condition assessment.
About Warren Diversion
The primary purpose of Warren Diversion is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is private-owned. It impounds the Big Creek Payette River near Cascade.
The dam stands 19 feet tall and stretches 100 feet across, creates a reservoir covering 25 acres, has a storage capacity of 100 acre-feet, and collects water from a drainage area of 56 square miles. Completed in 1924, the structure is over a century 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 07/02/2018.
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Location
| State | Idaho |
| County | Valley |
| Nearest City | Cascade |
| River/Stream | Big Creek Payette River |
| Coordinates | 44.48590, -115.96570 |
Physical Characteristics
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 100 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Normal Storage | 100 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 56 sq mi |
| Max Discharge | 908 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Irrigation |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 07/02/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | ID00323 |
| Federal ID | ID00323 |
| More Info | State Dam Safety Program |