and University Avenue (today's "Western Dental" building) in 1912. "Thirtieth & University" became North Park's symbolic place name, and within 10 years, this became the heart of the community. Later in the 1910s, North Park became one of the many San Diego neighborhoods connected by the Class 1 streetcars and an extensive San Diego public transit system that was spurred by the Panama-California Exposition of 1915 and built by John D. Spreckels. These streetcars became a fixture of this neighborhood until their retirement in 1949. North Park was the site of the crash of PSA Flight 182, California's deadliest aviation accident to date. Architecture Although North Park 92104 is a neighborhood of mixed architectural styles from many eras, one area of note is the Morley Field area of North Park. Named for its proximity to Balboa Park's Morley Field Sports Complex, this area is lined with turn-of-the-century Craftsman Bungalows and California Bungalows. Because many of the homes were designed by renowned designer and builder David Owen Dryden, the area is the site of the "Dryden Historic District." This historical district includes the homes along 28th and Pershing Streets, both bordered on the south by Upas Street and to the north by Landis Street. North Park Dryden Historic District was approved by Historical Resources Board on June 23, 2011 An application for designation of 28th Street and Pershing Avenue from Upas to Landis Streets as a historic district was filed with the City of San Diego Historical Resources Board in May 2007. In September 2008, City staff requested additional information. The Working Group submitted a Supplemental Application in January 2009. The Supplemental Application discusses why the neighborhood reflects significant elements of North Park's development, justifies the proposed district boundaries and nominates Edward F. Bryans, who built more than a dozen homes in the proposed district, as a Master Builder. On June 23, 2011, the City's Historical Resources Board (HRB) approved, by a vote of 8-0, establishment of the North Park Dryden Historic District and also approved Edward F. Bryans as a Master Builder. Of the 136 homes in the District, 104 were approved by the HRB as contributing resources to the District. As evidenced above, interest in the history of North Park (especially its architecture) appears to be growing. Helping to foster this interest and awareness is the North Park Historical Society, a local volunteer civic organization. The North Park Historical