The Mission Bay Branch Library, located at 960 Fourth St., is the newest San Francisco Public Library branch to be built in 40 years. Opened on July 8, 2006, this 7,500-square-foot library caters to the burgeoning new Mission Bay neighborhood. Designed by San Francisco-based Santos Prescott and Associates, construction cost $3.9 million. It is located on the ground floor of a multi-use facility which also houses an adult day health center, affordable senior housing, retail space and a large community meeting room. The Mission Creek Senior Community development, which houses the new library, is a collaboration between the San Francisco Public Library, Mercy Housing California, North and South of Market Adult Day Health Center, the San Francisco Redevelopment Agency and the San Francisco Department of Public Health. Mercy Services Corporation will operate the senior housing and programs, and manage the completed facility.