Undergrounding feasibility study adds first of several critical components to Austin Energy’s reliability planning

March 25, 2025

As Austin experiences hotter summers, colder winters and more extreme weather, Austin Energy is working to incorporate the results of two independent studies focused on its 5,000 miles of overhead electrical distribution lines into a comprehensive reliability plan. Today, Austin Energy briefed City Council on the results of the first of these studies.

Austin Energy partnered with engineering firm 1898 & Co. to study the feasibility and cost of burying overhead power lines. A second study, focused on “hardening” existing overhead lines in areas especially vulnerable to outages and wildfires, is expected to conclude in May. Both studies will inform a comprehensive Distribution Resiliency Plan that Austin Energy plans to present to Austin City Council toward the end of 2025.

Undergrounding feasibility results

1898 & Co. recommended that due to the cost, environmental concerns and community impacts, Austin Energy should analyze projects to see where strategic undergrounding makes sense or where an overhead alternative may be more appropriate rather than undertaking a large-scale effort to convert existing overhead lines to underground. The consultant further recommended that Austin Energy include the study results and data in a larger strategy for reliability and resilience.

The study noted a variety of challenges to undergrounding work including environmentally sensitive or protected areas, limited space within underground easements, acquiring permits, telecommunication line relocation, rocky soils and traffic disruption. 1898 & Co. concluded roughly 120 miles of Austin Energy’s lines may have benefits that exceed the costs of undergrounding power lines, but other resiliency solutions could be more effective and less costly than undergrounding.

The undergrounding feasibility study estimated that placing all of Austin Energy’s overhead lines underground would cost $50 billion and require decades of work. For perspective, Austin Energy’s entire Fiscal Year 2025 budget is approximately $2 billion.

Austin Energy’s current and ongoing reliability initiatives

Keeping the energy flowing for our community is Austin Energy’s focus every day. The two distribution system studies will bolster these ongoing reliability initiatives:

• Supporting underground service design for new development.
• Wildfire mitigation by vegetation management efforts and Pano AI wildfire detection system.
• “Hardening” infrastructure to make electronic components and circuits resistant to damage or malfunction.
• Adding “smart” equipment to reduce outage durations.

“While all these efforts have historically been separate initiatives, we now see the need to bring these together with lessons learned together into one Comprehensive Distribution Resiliency Plan later this year,” said Bob Kahn, Austin Energy General Manager. “This long-range, ongoing plan will outline Austin Energy's strategies to make our grid more reliable and resilient for decades to come.”

About Austin Energy

Austin Energy, the City of Austin’s electric utility, serves more than 550,000 residential and commercial customer accounts and more than one million residents in Greater Austin. The utility’s mission — to safely deliver clean, affordable, reliable energy and excellent customer service — has guided Austin Energy in powering the community and supporting the region’s growth since 1895. For more information about Austin Energy, visit austinenergy.com.