The Federal Highway Administration has obligated a $400 million grant for the Golden Gate Bridge seismic retrofit, Executive Director Ting told the San Francisco County Transportation Authority at its Sept. 30 meeting. The authority’s staff said the funding will support work on the bridge’s main towers, energy dissipation devices for the side spans and strengthening of the main spans, with work scheduled to begin next year.

The obligating of FHWA funds means a major federal contribution is in place for planned retrofit phases, Executive Director Ting said. ‘‘The Federal Highway Administration has obligated a $400,000,000 grant for the Golden Gate Bridge seismic retrofit program,’’ Director Ting reported during the executive director’s update.

Why it matters: The retrofit addresses seismic vulnerability on a key regional connector linking San Francisco and Marin County. The board did not vote on the project at the Sept. 30 meeting; staff presented the funding update as information and did not request action.

Staff noted local oversight and project sequencing remain in place. Director Ting thanked local officials for their roles in facilitating the work. No additional timeline details or contract awards were presented at the meeting; staff said construction would begin next year but did not give a precise start date.

The authority’s report did not include a financing resolution or new contract approvals; it simply informed the board that the FHWA obligation had occurred and described the scope of planned retrofit work. Board members did not ask for or direct further action during the item.

The update came during the executive director’s monthly report and was followed by other federal- and locally-funded project updates.