To protect both upper and lower Mainstem project communities, Seven Oaks Dam, a 550-foot-high and 2,980-foot long rockfill dam with a gross capacity of 147,970 acre feet, has been…

Project Background In April 2019, OC Public Works received an inquiry from an area resident regarding flooding at the intersection of Santa Clara Avenue and Prospect Avenue., which prompted staff…

 Thank you for your interest in the upcoming Santa Ana-Delhi Channel Improvement Project. Join us for a community open house on Monday, July 24, 2023, from 5-7 p.m. at the Muth Interpretive…

OC Public Works Standard PlansCaltrans Standard DetailsAPWA Standard Plans (Purchase) and Green Book (Purchase)If there are any questions regarding the details of a document, or to obtain a hard copy…

Program Overview Year Adopted: 1990 Supervisorial Districts: 3 & 5 Cities covered by Santiago Canyon Road Fee Program: Anaheim, Irvine, Lake Forest, Mission Viejo, Orange, and Rancho…

Year Adopted: 2004 Supervisorial District: 5 Cities Covered by SCRIP Road Fee Program: Unincorporated Orange County Program Description Establishes a comprehensive…

U.S. Army Corps of Engineers Santiago Creek Project  Santa Ana River Mainstem (SARM) Santiago Creek Flood Risk Management Project

  Traffic Design & Signal Operations (TD&SO)TD&SO staff oversee the operation and maintenance of over 120 traffic signals and other traffic control devices within unincorporated…

OC Public Works is currently planning improvements along a portion of Yorba Street in unincorporated Santa Ana designed to reduce flooding, reduce the need for frequent roadway maintenance and…

Project Background The bridge located along Trabuco Canyon Road, between Rose Canyon Road and Trabuco Creek Road, is nearing the end of its service life and has required repeated maintenance…