SFMTA certifies EIR for Islais Creek (3rd Street) bridge replacement; board asks to review community mobility strategy

The SFMTA Board on Nov. 28 approved environmental findings for the Islais Creek (3rd Street) bridge replacement project, a Public Works‑led effort to rebuild a structurally deteriorating bridge that carries the T‑third light‑rail line and vehicle traffic across Islais Creek.

Public Works project manager Thomas Reutman described corrosion, cracking, frequent temporary patches and vulnerability to king tides and sea‑level rise. The draft/final environmental impact report concluded that some impacts — notably transit delay and loss of a historic built resource — could not be reduced below significance with mitigation. The EIR envisioned a maximum of about 24 months without T service south of the bridge and 15–18 months of full vehicle closure for bridge construction in some scenarios; the team said it crafted designs and prefabrication approaches to reduce downtime where feasible.

Agency commitments in the EIR include operating a bus bridge on Illinois Street with frequency designed to mirror a train’s one‑seat ride, running T‑service between Chinatown and Mission Bay loop where possible, and developing a funded ‘community engagement and mobility strategy’ during detailed design to identify fundable mitigations for transit, freight and neighborhood access. Staff emphasized the mobility strategy would be developed with community input and could include bus routing changes, extended Bayview shuttle service, micro‑mobility supports and short‑term capital fixes to improve access.

Board amendment and vote: Directors asked for additional transparency. Director Hinsley successfully moved an amendment requiring that the community mobility strategy be presented to the SFMTA board in a public meeting when it is complete; the board approved the EIR findings as amended.

Community concerns: Bayview residents, transit advocates and business groups urged minimizing disruption, securing funding for mitigations before starting construction, and creating a community oversight working group. Public Works and SFMTA staff said the EIR conclusion and the new mobility strategy are intended to guide mitigation planning, and that construction would not begin until funding and permits are in place; staff estimated the earliest start is 2027 pending funding.