Council approves replacement of Barton Springs (Zilker) Bridge after engineers warn of expired design life; federal grant included

The Austin City Council voted April 24 to replace the Barton Springs (Zilker) Bridge, approving a project that staff said is supported by a competitive federal bridge grant and engineering recommendations.

Director Richard Mendoza of Transportation & Public Works told council the bridge is inspected every two years by TxDOT and was rated in "fair condition" in 2024, but a forensic engineering review conducted in 2017 found problems not visible in routine inspections and recommended major rehabilitation or replacement within five years. "This bridge has exceeded its design life and design use," Mendoza said, describing how earlier lane reductions helped avoid a load limit but providing no assurance that future inspections will not require further operational restrictions.

Mendoza said the replacement application was supported by a federal bridge infrastructure grant in the neighborhood of $32 million. He said full replacement was recommended because a rehabilitation option would have required demolition to the piers, would be nearly as costly, and would not provide the same longevity. He estimated a multi‑year construction schedule — roughly three to four years — but said staff is exploring ways to compress the work and limit traffic impacts.

Public comment was strongly split. Opponents, including Bill Bunch of Save Our Springs Alliance and multiple residents and preservation advocates, urged repair and restoration instead of demolition and questioned the city's engineering conclusions and the need to expand the bridge. Bunch said independent review of the city's documents concluded the bridge "needs maintenance mainly to the decking, not demolition," and urged the council to preserve the historic structure and to pursue a public process on design and environmental impacts.

Supporters, including Joe Gieselman of Barton Hills, said the bridge is a critical access point for daily travel and emergency evacuation and argued that replacement is the prudent path. Gieselman said the bridge is one of two main access points for his neighborhood and noted wildfire evacuation concerns.

Why it matters: The bridge spans Barton Creek adjacent to Zilker Park, a high‑use recreational area. Staff said the replacement would maintain current travel lane capacity and add improved bike and pedestrian facilities; opponents said the replacement would damage a scenic, historic crossing and urged preservation.

Council action: After discussion and questions for staff, a motion to approve the replacement (item 50) passed. The motion was offered and carried; council adopted the project and accepted the federal grant funding. Councilmember Ellis moved; Councilmember Vela seconded; the mayor called the vote and stated "Motion carries. Item number 50 is approved." (No roll‑call tally was recorded in the public transcript.)

Implementation notes: Mendoza said the current design proposes maintaining through traffic lanes during construction and adding improved bike and pedestrian facilities. He told council the city is treating the grant award as targeted for replacement; staff said they will review grant conditions but did not indicate the award requires a fixed design. Staff also said they will coordinate with PARD on temporary impacts to park amenities such as the Zilker Eagle train during construction.

What to watch: Staff said the next steps include final design, coordination of construction phasing to limit impacts (staff discussed compressing schedules around major events such as music festivals), and briefing council on the procurement and timeline. Preservation groups said they will continue to press for repair or a scaled alternative and to seek greater public review of plans.