In this section you will find several informational resources including online maps, drawings, reports, manuals, and links to County Standard Plans and other government resources. Standard…

Year Adopted: 1982 Supervisorial Districts: 3 & 5  Cities covered by El Toro Road Fee Program: Lake Forest and Mission Viejo Program Description Improve El Toro Road from…

The East Garden Grove-Wintersburg Channel Improvement Project was officially completed in March 2023.Read and download the Notice of Project Completion.Watch the before and after drone video…

Diversion Dashboard: SystemThe following dashboard provides a systemwide visualization of diversion hours by date and diversion category for all designated Emergency Receiving Centers. Data…

The County of Orange has six active OC Road Fee Programs.  Each OC Road Fee Program has a specific Area of Benefit (AOB) that determines if an OC road fee is associated with the…

Improvements to 23 miles of existing channel from Weir Canyon Road to the Pacific Ocean include channel widening, improvement to the existing Greenville-Banning Channel located parallel to the river…

The major flooding threat in Orange County has been the Santa Ana River. In 1938, the Santa Ana River flooded parts of Anaheim, Santa Ana, and Garden Grove, reportedly killing more than 50 people.…

Year Adopted: 1987 Supervisorial District: 5 Cities covered by Moulton Parkway/Laguna Niguel Road Fee Program: Aliso Viejo, Dana Point, Laguna Beach, Laguna Hills, Laguna Niguel, Laguna…

Shari L. Freidenrich CPA, CCMT, CPFA, CPFIM and ACPFIM SHARI FREIDENRICH was first elected as Orange County’s Treasurer-Tax Collector in 2010 and subsequently re-elected without…