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OC Infrastructure Programs is located on the third floor of County Administration South.

phone  (714) 647-3999 or (714) 245-4589

  • Programming
  • Engineering Design
  • Flood Programs
  • Project Management
  • Traffic and Development Support

After-Hours Phone Numbers

Public roads, flood control channels and public right-of-way areas: (714) 955-0200
Water pollution incidents:  1 (877) 89-SPILL (77455)
County of Orange Facility Maintenance:  (714) 667-4900
For emergencies, please call 9-1-1

picture_as_pdf OC Civic Center Map and Parking Info

Note: A portion of the sidewalk on the east side of Ross Street is closed due to construction. Please see map in PDF above for alternate walking routes.

Mailing Address
P.O. Box 4048
Santa Ana, CA 92702-4048

To submit an online service request, please visit