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 building permit application. Each OC Road Fee Program also has its own fee schedule which imposes...

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 Plans & Specifications Find links to County, other governmental and non-governmental Standard Plans & Specifications. Drawings The Flood Drawing Index is an online link...

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 footage filmed by OC Survey!

Basemap of Drainage Facilities Basemap of Drainage Facilities OCFCD 1 OCFCD 2 OCFCD 3 OCFCD 4 OCFCD 5 OCFCD 6 OCFCD 7 OCFCD 8 OCFCD 9 OCFCD 10 OCFCD 11 OCFCD 12 OCFCD 13 OCFCD 14 OCFCD 15 OCFCD 16 OCFCD 18 OCFCD 19 OCFCD 20 OCFCD 21 OCFCD 22...

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) Master Plan of Arterial Highways (MPAH) Find links to the Orange County Transportation Authority’s Road Master Plan, covering freeways, arterial highways and...

OC Public Works Standard Plans Caltrans Standard Details APWA Standard Plans (Purchase) and Green Book (Purchase) If there are any questions regarding the details of a document, or to obtain a hard copy or other alternative formats of the original document, or to have a document read to you, please...

A 100-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 national standard used by the National Flood Insurance Program (NFIP) and...

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 Orange County and for the John Wayne Airport agency this includes the management of the Traffic Signal Maintenance contract* and operating/maintaining the Traffic Management Center...

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) OC Local Drainage Manual (LDM) 2nd Edition Secured OC Hydrology Manual Hydrology Manual 1996 Addendum OC Hydrology Manual Maps OC...

OC Infrastructure Programs manages OC Public Works' Road and Bridge, Flood, and Bikeway Projects approved by the County of Orange Board of Supervisors and listed in the 7-Year Capital Improvement Program. Visit our 7-Year Capital Improvement Program page for direct links to downloadable project lists and interactive maps.