Abstract
Working in the employ of JRP Historical Consulting, LLC (JRP), a cultural resources management firm based in Davis, California, the author, Chandra Miller, produced four Historic American Engineering Record (HAER) reports on four historic railroad grade separations in the City of San Mateo in San Mateo County, California. The recordation of the structures was part of the National Historic Preservation Act Section 106 compliance process to mitigate adverse effects to historic properties as a result of a Federal undertaking involving the grade separations. The four reports were submitted to the Library of Congress and are included as an appendix to this document. The purpose of this project is to place these railroad grade separations within the historic context of transportation technology and urban growth in the San Francisco Bay Area, discuss aspects of the history of historic preservation and HAER recordation, and present the process by which HAER reports are prepared as part of the Section 106 compliance documentation.