email Sign up for Email Updates from OC Traffic CommitteeThe OC Traffic Committee (OCTC) holds monthly meetings at 10:00 a.m. on the second Thursday of each month. Meetings may be cancelled if…

WORKING FOR ORANGE COUNTY OC Infrastructure Programs provides engineering services for roadways in unincorporated areas and regional flood control programs throughout Orange County. This…

Several of these manuals are available both in their entirety and broken down into sections for easier downloading.Title Computer Aided Design (CAD) Standards Manual (Version 1.0 - January 2023)…

Homeowners’ Guide for Post-Fire Flood, Debris, and Erosion Control We know from past experience that burn areas are especially susceptible to damage from flooding, and mud and debris flows that…

Prado Dam is an existing facility constructed by the Corps of Engineers in 1941. The plan of improvement for the Prado Dam and reservoir, which has an estimated cost of $880 million includes…

Search by Location To verify if a particular address falls within an OC Road Fee Program, please visit the Geographic Information System (GIS) web map application atlightbulb ocgis.…

Year Adopted: 1981 Year Closed: 2020 Supervisorial Districts: 3 & 5  Cities covered by Plano Trabuco Road Fee Program: Rancho Santa Margarita Program Description…

Geotechnical Design Report Revised Aerially Deposited Lead Report Material Report Aerial Deposited Lead Report

The Santa Ana River and its shoreline are home to numerous threatened or endangered species, including the Santa Ana sucker, the least Bell's vireo, the southwestern willow flycatcher, and the…

1. What is the OC Loop?The Orange County (OC) Loop is a vision for 66 miles of seamless connections and an opportunity for people to bike, walk, and connect to some of California’s most scenic…