It's no romantic tour of SROs and a bygone era, but change in the good ol' Tenderloin continues apace anyway. This latest, at 121 Golden Gate, is a plan by St. Anthony Foundation to demolish their current two-story building, which is being used as a kitchen and social services space. The nonprofit, in conjunction with Mercy Housing California and HKIT Architects, plans to build in its place a 99-foot-tall, 10-story building that will have 90 affordable units for seniors. The building's still early in the planning stages, and will be getting a full-on environmental impact review. According to the timeline in the initial study, construction should begin on the $39 million project toward the end of this year.