Reference Materials
In this section you will find informational resources including online maps, reports, manuals, and links to County Standard Plans and other government resources. Reference Materials (in PDF format)…
Supervisor Chaffees Kids Fishing Derby
Visit our booth at Supervisor Doug Chaffee's Fourth District Kids Fishing Derby at Tri-City Regional Park!Date: Saturday, September 20, 2025Address: 2301 N. Kraemer Blvd., Placentia, CA 92870The…
Standard Plans Specifications
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…
Glossary of Terms
A100-Year (or Base) Flood:A flood event that statistically has a 1 out of 100 (or one percent) chance of being equaled or exceeded on a specific watercourse in any given year. The base flood is the…
Orange County Criminal Justice Coordinating Council
Orange County Criminal Justice Coordinating Council (OCCJCC)General InformationMISSIONTo improve public safety on behalf of Orange County residents, through greater inter-agency communication,…
TRAFFIC ENGINEERING
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…
Letter of Transmittal
From the Desk of Michelle Aguirre, County Executive Officer It is with immense pride and a profound sense of purpose that I present the OC Cares: Master Plan for Aging (OC MPA). This…
Important Dates Fiscal Year Begins July 1
The following schedule is intended to serve as a general guide to property owners in Orange County, California. Please note that the list below includes only the more significant dates and does not…
Online Manuals
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)…