City of Chicago | Inspections, Permitting, and, Licensing

Inspections, Permitting & Licensing

Utility Markings

Within 48 hours (excluding Saturdays, Sundays, and holidays) of receipt of notice, 811 Chicago utility members shall mark the locations of their underground facilities as to apprise the person excavating or involved in demolition, the location of the underground facility. The location of underground utility facilities is defined as a strip of land at least three (3) feet wide but not wider than the width of the underground facility plus eighteen (18) inches on either side of the facility.

An underground utility facility will be marked through the use of different colors of paint following the American Public Works Association Color Code:

  • ELECTRIC - 911 EMERGENCY - SAFETY RED
  • GAS-OIL-STEAM-PETROLEUM - HIGH VISIBILITY SAFETY YELLOW
  • COMMUNICATION/CATV - TELEPHONE - T.V. - ALERT ORANGE
  • POTABLE WATER - SAFETY PRECAUTION BLUE
  • SEWER - SAFETY PRECAUTION GREEN
  • PROPOSED EXCAVATION - SAFETY WHITE
If you need assistance, please contact support for the appropriate department.
If your question is about an existing permit application, please include your application number or the address of your application.