Black Rock to Sigurd transmission line project
About the project
The purpose and need for the Black Rock – Sigurd 230-kilovolt line is to help ensure the transmission system is reliable. With increased energy usage across PacifiCorp's service territory and an increase in solar power interconnecting in Central Utah, a new line is needed to transport cost-effective solar energy to the load centers across PacifiCorp's service territory. The Black Rock – Sigurd 230 kV line is the most economical way to meet the reliability requirements and transmit solar energy from Central Utah to the load centers. Without a new line, the existing transmission system becomes overloaded and does not meet the reliability criteria as per the required NERC TPL Standard. To fix this, PacifiCorp is building a new 230 kV line to allow cost effective solar power to serve the load centers. The installation and energization of the Black Rock – Sigurd 230 kV line will contribute to an additional 1,298 megawatts of planned/requested renewable energy coming online and establish a transmission route that enhances overall grid resilience.
- Type of structure: Steel monopoles and Wood H-Frame structures
- Voltage: 230 kV
- End points: Black Rock substation and Sigurd substation
- Length: Approximately 67 miles
- Height of structures: 50-100 feet
- Span between structures: 500-1200 feet
- Right-of-way width: 100 feet
Project timeline
Anticipated In-Service Date: 2027
Project map
Black Rock to Sigurd Project Map
Public outreach
Outreach efforts are essential to the early identification and resolution of potential project issues. The Company will perform public outreach to inform each land use authority about the project, and create opportunities for affected stakeholders to have their questions and concerns addressed. Notifications of public outreach opportunities will be mailed out to stakeholders and posted on this site. Additionally, this website will be updated throughout the project with various pieces of key information.
Any questions or comments about the project can be directed to pacpmo@pacificorp.com and be sure to note “Black Rock to Sigurd” in the subject line. Input and feedback are valuable to us as we work through the planning and permitting phases of the project. Please include your contact information and preferred contact method in your correspondence.