Planning Commission certifies EIR and approves entitlements for Potrero Yard modernization, citing housing and transit benefits

The San Francisco Planning Commission on Jan. 11 certified the final environmental impact report and approved a package of entitlements for the Potrero Yard Modernization Project at 2500 Mariposa Street, advancing a joint SFMTA and Potrero Neighborhood Collective proposal that pairs a new bus yard with substantial affordable housing.

Staff told commissioners the EIR analyzed two variants: a refined preferred project that maximizes housing on a podium above the bus facility and a paratransit variant that retains additional paratransit storage with fewer units. "The first item before you is the certification of a final environmental impact report or EIR for the project," environmental planner Jennifer McKellar said. The EIR finds the project would result in significant and unavoidable impacts for historical resources (demolition of the existing Potrero Trolley Coach Division building, eligible for the California Register of Historical Resources) and for air quality when construction and operations are analyzed together. Staff said many other impacts (noise, vibration, wind, tribal cultural resources and paleontological resources) could be mitigated to less‑than‑significant levels.

Project sponsors and neighborhood partners described the plan as a multi‑phase effort that would deliver a modern bus facility and deeply affordable housing. Anna Herrera, legislative aide to Supervisor Hillary Ronan, said the project "will combine the modernization of the outdated Potrero bus yard with new construction of hundreds of units of 100% affordable housing," and SFMTA staff said the new yard will accommodate about 54% more buses to improve Muni reliability. Potrero Neighborhood Collective representatives emphasized local hiring, LBE participation, vendor kiosks, a public restroom and arts opportunities. Developer representatives confirmed they have committed some local funds (the developer team noted an earlier reference to up to $35,000,000 from MOHDD toward aspects of phase 2) but said additional financing for full housing phases remains to be secured.

Commissioners pressed staff on the CEQA tradeoffs. Commissioner Diamond said she was troubled by the project's unmitigated toxic air contaminant finding but noted that the EIR's operations‑only scenario modeled lower risk; staff explained the construction period is the main contributor and that the EIR reported an excess cancer risk contribution of 6.87 against a 7.0 threshold—close but conservatively flagged. Ultimately the commission adopted the statement of overriding considerations under CEQA and approved the remaining entitlements — general plan amendments (recommended to the Board of Supervisors), Planning Code text and zoning map changes to create a Potrero Yard Special Use District, shadow findings and the conditional use authorization for the PUD — by unanimous votes.

The project will proceed to the Board of Supervisors and to negotiating project agreements that will memorialize affordability commitments and timing for any shift to the paratransit variant.