“Endangered Garden”, a linear park along San Francisco Bay was commissioned in 1987 by the San Francisco Arts Commission. As co-designer of the thirty million dollar “Sunnydale Facilities”, a pump station and holding tank for water and sewage, Patricia Johanson's intent was to present this functional structure as a work of art and a productive landscape. Other goals included increasing food and habitat for wildlife, and providing maximum public access to San Francisco Bay. Tidal sculpture, butterfly meadow, habitat restoration, seating, and overlook are all incorporated into the image of the endangered San Francisco Garter Snake, as is a public access baywalk, thirty feet wide and one-third of a mile long that coincides with the roof of the new transport / storage sewer.