Underwater Columbia River Transmission Line
Sector: Hydro • Location: The Dalles and Portland, Oregon and Washington, United States
Source: NWPB
A proposed 100-mile high-voltage transmission line to be built underwater beneath the Columbia River, starting in The Dalles, Oregon, and ending in Portland, Oregon. The line would bypass the Bonneville Dam in Skamania County, Washington, and aims to improve energy transmission from eastern Washington and Oregon to western load centers. The project involves trenching the riverbed to bury cables at
- Status
- Prospective
- Sector
- Hydro, Power Transmission, Power Generation (CCGT)
- Location
- The Dalles and Portland, Oregon and Washington, United States of America
- Updated
- 22 Jul 2026
- Source
- NWPB
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Project Information
Participants
| Not available for this record. |
Status
Original status | planned |
Taiyo status | Prospective |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | A proposed 100-mile high-voltage transmission line to be built underwater beneath the Columbia River, starting in The Dalles, Oregon, and ending in Portland, Oregon. The line would bypass the Bonneville Dam in Skamania County, Washington, and aims to improve energy transmission from eastern Washington and Oregon to western load centers. The project involves trenching the riverbed to bury cables at least 10 feet deep, with construction planned over two winters to avoid salmon migration. |
Original sector | Energy |
Budget |
Location
Country | United States of America (USA) |
State | Oregon and Washington |
City | The Dalles and Portland |
Source
Source | NWPB |
URL |
More Details
Record type | Project |
Sector | Hydro, Power Transmission, Power Generation (CCGT) |
Article published date | 2026-06-01 |
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