Tournesol Siteworks is thoroughly involved in this high profile project, as 192, 000 sq. ft  our VersiCell sub-surface drainage panels were specified by PWP Landscape Architecture. In the SF Chronicle article titled “Transbay Transit Center rooftop turning into 5.4-acre City Park,” writer J.K. Dineen states,

The Transbay Transit Center is set to open late this year and will serve numerous bus lines, including AC Transit, Muni, Golden Gate Transit and Greyhound. It’s still unknown when it might connect to high-speed rail or Caltrain, which will operate the station, how much it will cost to operate, or what shops and restaurants will occupy the 100,000 square feet of retail space.

…But what is known is this: Tree by tree, San Francisco’s next significant public open space, a 5.4-acre green rooftop boxed in by towers of glass, is taking shape atop the transit center. And amid all the questions about the future of the transit center, it is the park — with its carefully curated collection of flora — that has the potential to make the project an attraction in the years before the trains arrive.

New Orleans Botanical Garden, Arrival Entrance and Event Court; photo courtesy of Luis Andrade, Ewing

Our Versicell drainage panels were installed by contractors from McGuire and Hester out of Alameda, CA, just across the bay from San Francisco. VersiCell is a sub-surface drainage panel that provides the ultimate combination of strength and water flow capacity. The modular, connectable panels are frequently used in a variety of installations where fast, high-volume water flow is critical. In addition to sub-surface drainage, VersiCell is frequently used in place of heavy gravel aggregates for waterproofing membrane protection, for heat and sound insulation on structures, as a drainage channel, and on subterranean walls to prevent hydrostatic pressure buildup.

To read the entire SF Chronicle, Transbay Transit Center article, please click here. It is exciting to know that our VersiCell is highly inert, and won’t break down or crush over the life of this application, and that we are part of a project that will be enjoyed by people for decades.


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