Line Marking in Ontario

They follow the APWA Uniform Color Code. Red is electric power, cables, conduit, and lighting; yellow is gas, oil, steam, and petroleum; orange is communication, alarm, and signal lines; blue is potable water; green is sewer and drain lines; purple is reclaimed water, irrigation, and slurry lines; pink is temporary survey markings; and white is the proposed excavation. Individual one-call programs sometimes layer local conventions on top of the base code, so confirm marking requirements with the one-call center for your state or province.

There is no fixed lifespan. Paint on turf often disappears within days once mowing and irrigation resume, paint on pavement fades over weeks under traffic, sweeping, UV, and rain, and flags get pulled, mowed, or blown out. One-call tickets also carry a statutory life that varies by state and province, so public marks have to be refreshed by requesting a re-mark before the ticket expires. On phased or long-duration work, plan on the locating company returning to re-mark rather than trusting old paint, and photograph or survey the marks while they are still fresh.

Private locating is quoted per job rather than off a published rate. What moves the number is how much ground has to be covered, how many utilities are in play, whether the lines are metallic or plastic, how reachable the meters, valves, and tracer wire access points are, and whether you need surface marks only or a drawing and GPS data as well. Across Ontario the number also moves with ground conditions and travel distance to the site, so companies quote the specific job rather than a rate card. Describe it once through Utility Hotline and locating companies offering Line Marking in that part of Ontario send you their own quotes.

Yes. Excavation in Ontario calls for a one-call ticket with Ontario One Call (1-800-400-2255) before the ground is opened. It is free, it is required by law before excavation in most jurisdictions, and its members mark the public lines they own, which in practice stops at the meter or the right-of-way. That leaves the private side unmarked: services past the meter, unrecorded runs, and abandoned lines still in the ground. Line Marking is one of the ways that side gets covered, and it works alongside the one-call ticket rather than in place of it.

Coverage is settled one request at a time rather than off a published service-area map. Requests come in from cities across Ontario, spanning the Central Canada, and each one goes to the companies offering Line Marking on that ground. Coverage runs deeper around the larger metros, and some crews travel for rural and multi-site work, so a remote site is worth submitting rather than assuming nobody serves it. Tell us the job site and the replies tell you who does.