Quake and Rebuilding: An Archive of Streetcar Pictures ~ Friday, April 17, 2009
San Francisco's major transit provider at the time of the 1906 earthquake, the United Railroads (later reorganized as the Market Street Railway, later merged into the Muni), kept meticulous photographic records. Some of the have recently emerged from the City's archives, and show both the devastation caused by the earthquake and fire,
and hurried rebuilding:
Here's an online SFGate/Chronicle story with more pictures.