page_title: Arroyo Seco (Los Angeles County)
section_title: Arroyo Seco Parkway
hierarchical_section_title: Arroyo Seco (Los Angeles County) / History / Transportation corridor / Arroyo Seco Parkway
caption_attribution_description: English: sign on CA 110: Welcome To The Historic Arryo Seco Parkway sign on CA 110: Welcome To The Historic Arryo Seco Parkway
context_page_description: The Arroyo Seco, meaning "dry stream" in Spanish, is a 24.9-mile-long seasonal river, canyon, watershed, and cultural area in Los Angeles County, California. The area was explored by Gaspar de Portolà who named the stream Arroyo Seco as this canyon had the least water of any they had seen. During this exploration he met the Chief Hahamog-na of the Tongva Indians.
context_section_description: By mid-20th Century, the automobile had long become a mainstay of Southern California life. In 1940 the Arroyo Seco Parkway, the first freeway, was built as a parkway alongside the newly constructed flood channel in the Los Angeles portion of the Arroyo. Today, also known as the Pasadena Freeway, it continues on through downtown becoming the Harbor Freeway, and terminates near the harbor in San Pedro.
  The Arroyo Seco Corridor Management Plan was completed for the "Arroyo Seco Parkway" in 2004.  The Plan was created through a partnership with the National Trust for Historic Preservation, the National Scenic Byways Center (Federal Highways), Caltrans (State Highways), the National Park Service, the Santa Monica Mountains Conservancy, and The Center for Preservation Education and Planning (CPEP Inc.).
  The Arroyo Seco Flood Control Channel, was built by the Works Progress Administration before and during construction of the parkway to avoid damages from future floods.
caption: Arroyo Seco Parkway
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