As utilities work to accommodate growing electricity demand, renewable generation, and large-scale electrification initiatives, transmission systems are facing increasing pressure to deliver more capacity, greater resiliency, and higher reliability. While new technologies continue to emerge, utilities are also confronting practical challenges related to aging infrastructure, workforce constraints, evolving regulations, and project delivery risks.
These challenges were a central focus during CEATI’s recent Overhead Transmission Design Spring General Meeting, hosted by Hydro-Québec in Montreal. The meeting brought together transmission professionals from across North America to exchange lessons learned, discuss emerging priorities, and explore engineering solutions for the evolving transmission landscape. Participants also toured Hydro-Québec’s Institut de recherche d’Hydro-Québec (IREQ), gaining firsthand insight into ongoing research and innovation initiatives supporting transmission system development.
Across the discussions, one theme stood out: utilities are looking for practical ways to expand and strengthen transmission systems while balancing reliability, affordability, and long-term asset performance.
1. Maximizing existing transmission assets is becoming a strategic priority
As load growth accelerates due to electrification, data centers, renewable generation, and industrial development, utilities are increasingly focused on extracting additional capacity from existing transmission corridors.
Members discussed growing interest in dynamic line ratings (DLR), ambient adjusted ratings (AAR), high-temperature low-sag (HTLS) conductors, voltage uprating, and other grid-enhancing technologies that can increase transfer capability without requiring entirely new rights-of-way.
The takeaway: optimizing existing assets is becoming one of the most practical and cost-effective ways to address growing transmission needs.
2. Resiliency and regulatory requirements continue to evolve
Utilities are operating in an environment of increasing regulatory complexity while simultaneously preparing for more frequent and severe weather events.
Members discussed challenges related to evolving reliability standards, climate adaptation requirements, wildfire risk, icing, conductor galloping, physical security concerns, and broader resiliency planning efforts. As expectations continue to evolve, utilities are looking for design approaches that improve system resilience while remaining practical to implement.
The takeaway: resiliency is no longer a standalone initiative. It is becoming a core design consideration across transmission planning, engineering, and operations.
3. Aging infrastructure remains a long-term reliability challenge
Many transmission assets are approaching or exceeding their original design lives, creating growing concerns around reliability, condition assessment, and replacement prioritization.
Members highlighted challenges associated with foundation corrosion, conductor deterioration, aging wood structures, concrete degradation, and modernization of critical infrastructure. Utilities are increasingly seeking risk-based frameworks that support informed decisions about life extension, refurbishment, and replacement.
The takeaway: understanding asset condition and remaining life is becoming increasingly important for maintaining reliability while controlling costs.
4. Workforce development is becoming a business necessity
Many utilities continue to face workforce challenges driven by retirements, rapid hiring, and increasing project complexity.
Members discussed concerns related to knowledge transfer, technical training, and maintaining engineering expertise as experienced professionals leave the workforce. Access to practical guidance, training resources, and peer-to-peer knowledge sharing remains a priority for organizations seeking to develop the next generation of transmission professionals.
The takeaway: technical expertise is becoming one of the industry's most valuable resources, making workforce development a strategic priority rather than simply a staffing issue.
5. Transmission expansion faces growing project delivery challenges
Utilities across North America are planning significant transmission expansion programs to support reliability, electrification, renewable integration, and economic growth.
However, these efforts are increasingly constrained by supply chain limitations, material shortages, contractor availability, manufacturing lead times, and competition for specialized resources. Members discussed the importance of sharing lessons learned and identifying strategies to manage procurement risks and improve project execution.
The takeaway: successful transmission expansion depends not only on engineering solutions, but also on effective supply chain management and project delivery planning.
What do these trends mean for transmission utilities?
The discussions in Montreal reinforced a clear message: the future of transmission infrastructure will depend on utilities' ability to balance growth, reliability, resiliency, and affordability.
As utilities work to increase system capacity, modernize aging assets, strengthen resiliency, and deliver major capital projects, success will depend on combining innovative technologies with practical engineering, strong asset management practices, and industry collaboration.
These are not challenges any one utility is facing alone. By sharing experiences, lessons learned, and emerging approaches, utilities can make more informed decisions as they prepare for the next generation of transmission system development.
CEATI thanks Hydro-Québec for hosting the meeting and providing valuable opportunities for collaboration and knowledge exchange among members.
Learn more about CEATI's Overhead Transmission Design Program. Interested in joining the next discussion? Connect with us to discuss membership or join us at our annual Transmission & Distribution Conference in Denver, November 17–18, 2026.
