William L. Jess Dam
ROGUE RIVER·
Jackson, Oregon·
Built 1976·
Rockfill·
342 ft tall
Physical Details
| Dam Height | 342 ft (taller than 99.4% in OR) |
| Dam Length | 3,600 ft |
| Dam Type | Rockfill |
| Max Storage | 500.0K acre-ft |
| Normal Storage | 465.0K acre-ft |
| Surface Area | 3,430 acres |
| Drainage Area | 674 sq mi |
| Max Discharge | 158,000 cfs |
| Year Completed | 1976 (50 years old) |
| NID ID | OR00612 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: July 21, 2021
State Regulated: No
Ownership
USACE - Portland District
Federal Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of William L. Jess Dam?
William L. Jess Dam is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns William L. Jess Dam?
William L. Jess Dam is owned by USACE - Portland District (Federal Government).
When was William L. Jess Dam last inspected?
William L. Jess Dam was last inspected on July 21, 2021.
When was William L. Jess Dam built?
William L. Jess Dam was completed in 1976, making it 50 years old.
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.