City of Fairfield, Ohio
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City of Fairfield, Ohio
City of Fairfield offices will be closed for Columbus Day on Monday, October 12

Call Before You Dig

The Ohio Utilities Protection Service provides a state-of-the-art call center that operates 24 hours a day, seven days a week to answer calls from anyone who intends to dig in the State of Ohio. The service provides more than 50 operators dedicated to answering all incoming calls within 20 seconds.

Call 1-800-362-2764 or 8-1-1 before you dig: It’s the law!

The information below aids use and understanding of the temporary marking of underground facilities to prevent accidental damage or service interruptions.

Use of Markings

Use color-coded surface marks (paint or similar coating) to indicate the location and route of buried lines. To increase visibility, color-coded vertical markers (temporary stakes or flags) should supplement surface marks.

All marks and markers should indicate the name, initials or logo of the company that owns or operates the line and the width of the facility if it is greater than 50mm (2").

If the surface over the buried line is to be removed, supplemental offset markings may be used. Offset markings should be on a uniform alignment and must clearly indicate that the actual facility is a specific distance away.

Location Tolerance Zone

Any excavation within the tolerance zone should be performed with hand tools until the marked facility is exposed. The width of the tolerance zone may be specified in law or code.

If not, 500 mm (18") is required from each side of the facility. The tolerance zone includes the width of the facility and 500 mm (18") measured horizontally from each side of the facility.

Proposed Excavation

Use white marks to show the location or boundary of proposed excavation. Surface marks on roadways should not exceed 40 mm by 500 mm (1 1/2" by 18"). The facility color may be added to white flags or stakes.

One-Call Systems

One-call damage prevention systems should be contacted prior to excavating to prevent damage to buried facilities.

Adopt Uniform Color Code

The American Public Works Association encourages public agencies, utilities, contractors, other associations, manufacturers and all others involved in excavation to adopt the ULCC Uniform Color Code using ANSI standard Z53.1 safety colors as shown below.


Red: Electric power lines, cables, conduit and lighting cables.
Yellow: Gas, oil, steam, petroleum or gaseous materials.
Orange: Communication, alarm or signal lines, cables or conduit.
Blue: Potable water.
Purple: Reclaimed water, irrigation and slurry lines.
Green: Sewers and drain lines.
Pink: Temporary survey markings.
White: Proposed excavating.