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Design commission grills staff on lane counts as Austin briefs on Barton Springs Road bridge replacement
Summary
City staff told the Design Commission the Barton Springs Road bridge is structurally deteriorated and, guided by federal NEPA requirements and traffic studies, the preferred path is full replacement. Commissioners raised concerns that the replacement restores higher traffic capacity rather than continuing recent lane reductions that prioritized safety and active modes.
City staff told the Austin Design Commission May 18 that the Barton Springs Road bridge is structurally deteriorated and needs substantial work and that, because of a federal grant, the project must undergo the National Environmental Policy Act review before construction.
"Because of that federal grant that we received for construction, the project needs to go through the National Environmental Policy Act or NEPA process," Eric Bailey of Capital Delivery Services said, adding the project received a recently awarded $32,000,000 Federal Highway Administration grant toward construction. Bailey said the consulting engineer concluded the deck and spandrel columns exhibit deterioration that cannot be addressed with light-touch repairs and that replacement or full stripping and extensive rebuilds are the viable alternatives.
Commissioners pressed staff on whether the replacement option would return the bridge to greater vehicular capacity. Commissioner Kevin Howard said he worried the replacement would expand traffic lanes "when Barton Springs ... east of here has been reconfigured to be 1 lane in either direction with a turn lane and protected bike lanes." He asked why the proposed design appeared to provide additional vehicular capacity while the corridor east of the bridge currently operates with fewer lanes.
Bailey responded that the bridge was originally designed for four through lanes and that temporary lane reductions resulted from load limits on the existing structure: "The bridge is designed as a 4 lane bridge... the far northern lanes had to be load limited" and the new design follows traffic counts and the Austin Strategic Mobility Plan for pedestrian and bicycle facility dimensions.
Other commissioners echoed concerns about scale and environmental impacts. Commissioner Carroll called moving to a larger bridge "unnecessary" and said it risks environmental harm in a sensitive area; Commissioner Whitstrup (later comments) urged the design team to treat the project as a placemaking opportunity rather than primarily a car-oriented solution.
Bailey said the Army Corps of Engineers and the Texas Historical Commission have approved full replacement as a viable alternative and that staff is coordinating with TxDOT, the Corps and other partners as part of NEPA. He said the NEPA process is expected to take roughly a year, with the team aiming to complete NEPA by 2026 and advertise the project for bid in 2027, though schedule pressures could shift dates.
On construction staging, Bailey said staff considered a full closure but rejected it because of the impact to emergency response and a high-frequency CapMetro route; the current plan is to keep one lane open in each direction across the bridge and expect an approximately two-year construction duration.
The commission provided comments and requested follow-up information on traffic projections, how the bridge ties into east-of-bridge lane reductions, and potential green/stormwater infrastructure that could be incorporated during final design. The project will return to boards and commissions later in the permitting and design process.
