The San Francisco Municipal Transportation Agency’s formal application to move forward with the ambitious redevelopment of the Potrero Yard Muni Bus Maintenance Facility at 2500 Mariposa Street has been newly massed and formally submitted to Planning for review.
As proposed, the existing facility on the 4.4-acre site will be rebuilt, increasing the yard’s storage capacity from 138 to 213 buses, modernizing the infrastructure to accommodate battery electric buses, facilitating Muni’s transition to an all-electric fleet, and yielding a state-of-the-art operator training facility and operations center, with a three-story, 75-foot-tall podium garage across the majority of the site.
Atop the new 600,000-square-foot Muni facility, the SFMTA is proposing the development of between 525 and 575 residential units, half of which would be offered at below market rates (BMR) and 40 percent of which would have two bedrooms or more, along with 91,000 square feet of rooftop open space and 4,000 square feet of commercial space fronting Bryant Street.
While the Mariposa site is currently only zoned for Public uses and limited to development up to 65 feet in height, the proposed $495 million development, which is being designed by Sitelab Urban Studio, would rise to a maximum height of 150 feet and will require a rezoning for use, height and mass to proceed.
And based on its preliminary review of the aforementioned plans, Planning is generally supportive of the proposed project, density and approach, with one exception and request.
From Planning’s feedback to the design team:
“Planning is very interested in assuring that this bus facility is designed to contribute to its urban context by featuring active uses along the perimeter of the bus facility. Planning agrees with the emphasis of placing most of the active uses along Bryant Street while allowing the Mariposa frontage to serve the main frontage for the bus operations. However, Planning is interested in finding ways to assure that as much of the perimeter features active frontages as possible — particularly along 17th Street –which means balancing interior efficiency with providing uses at the building’s parameter that have a stronger relationship to the surrounding public realm and other uses.”
As preliminarily proposed, the 17th Street frontage of the development would effectively be an inactive, 70-foot-tall street wall stretching from Bryant to Hampshire.
We’ll keep you posted and plugged-in.
Editor’s Note: As a point of order, while SITELAB completed the conceptual design for the project’s preliminary planning application (PPA), as massed and rendered above, the team has not been engaged to refine and finalize the design.