BPA will upgrade aging equipment on the Celilo-Sylmar 500-kilovolt transmission line from the Celilo Converter Station in The Dalles, Oregon to the Nevada-Oregon border (265 miles), where BPA’s ownership of the 846-mile line terminates. This work will increase the PDCI transfer capability from its current 3100 megawatt (MW) capacity to 3220 MW. The upgrades will improve reliability and performance of the aging DC line.
The project will deliver several important advantages:
Improve reliability for all users - The upgrade will assure a reliable future for the region’s valuable transmission infrastructure. It would make the PDCI more dependable and allow the continued transfer of power between the Northwest and Southern California, a benefit for both regions.
Benefits regional economy - The project will boost the economy and create or secure jobs. It requires spending on construction materials, transportation services, site preparation and construction, food, fuel and lodging for construction staff.
Accommodate increased power transmission - The upgrade will allow even more clean power, including hydro, wind and solar, to reach markets that need it. Upgrading and reinforcing existing transmission pathways causes less environmental disruption than building new lines.
Support customers' needs - The project will fulfill requests from BPA’s customers for more DC transmission capacity. Generators are queued up, waiting to get their power delivered to markets. Increasing DC line capacity helps meet the needs of regional power generators and consumers in California.