Porter Ranch community started as a housing tract in the community of Northridge. This was along San Fernando Mission Blvd west of Reseda Blvd circa 1960-1963. No homes were north of Rinaldi except for a few dozen above "the ridge", where there was a 7/11 which was a destination for determined kids who like to hike or ride bikes up Tampa. These homes were only accessible via Tampa. Approximately 50 homes of the original tract was destroyed north of San Fernando Mission Blvd to build the 118 freeway.