By JACQI LEYVA-HILL
Special to the PRESS
After decades of discussion, plans for a second causeway connecting South Padre Island to the mainland are once again moving forward, though construction remains years away and city officials have not yet provided public comment on the project’s progress.
Environmental clearance is expected by 2026, and if approvals and funding align, construction could begin as early as 2029. The project will require coordination among multiple agencies, including the U.S. Fish and Wildlife Service, the U.S. Army Corps of Engineers, and the Environmental Protection Agency.
In December 2023, the Texas Transportation Commission officially designated the proposed bridge route as State Highway 104 (SH 104). The change allows the Texas Department of Transportation (TxDOT) and the Cameron County Regional Mobility Authority (CCRMA) to continue environmental studies and pursue new funding opportunities for the long-awaited second access point to the Island.
The proposed 11-mile route would include an eight-mile bridge spanning the Laguna Madre, linking FM 106 on the mainland to Park Road 100 on South Padre Island, roughly three to four miles north of the existing Queen Isabella Memorial Bridge. Officials say the project is essential for hurricane evacuation, emergency access, and reducing heavy traffic during peak tourism periods.
CCRMA Executive Director Pete Sepulveda Jr. called the project “the most environmentally complex task in the nation” in a 2017 Port Isabel–South Padre Press article outlining earlier design changes. The description highlights the project’s scale and the sensitive ecosystems it will cross.
The estimated cost ranges from $700 million to $1 billion, according to the City of Brownsville’s 2024 Civic Alerts and industry reports from Associated Construction Publications – Texas Contractor (ACPP Construction News). ACPP is part of a national trade network that routinely covers major TxDOT projects, including the South Padre Island Second Access / SH 104 Causeway.
For now, residents and visitors must continue relying on the Queen Isabella Causeway as planners work toward building what could become the Island’s long-awaited second lifeline.
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