Swift No. 1
Lewis River·
Skamania, Washington·
Built 1958·
Earth·
412 ft tall
Physical Details
| Dam Height | 412 ft (taller than 96.7% in WA) |
| Dam Length | 2,100 ft |
| Dam Type | Earth |
| Max Storage | 755.5K acre-ft |
| Normal Storage | 755.5K acre-ft |
| Surface Area | 4,620 acres |
| Drainage Area | 477 sq mi |
| Max Discharge | 184,300 cfs |
| Year Completed | 1958 (68 years old) |
| NID ID | WA00147 |
Safety Information
High Hazard
Loss of human life is likely if the dam fails
Emergency Action Plan: Yes
Last Inspection: May 3, 2022
State Regulated: No
Ownership
PacifiCorp
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Swift No. 1?
Swift No. 1 is classified as High Hazard. Loss of human life is likely if the dam fails.
Who owns Swift No. 1?
Swift No. 1 is owned by PacifiCorp (Private).
When was Swift No. 1 last inspected?
Swift No. 1 was last inspected on May 3, 2022.
When was Swift No. 1 built?
Swift No. 1 was completed in 1958, making it 68 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.