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APWA color-coded paint and flags on the ground so the crew about to dig can see what is under them.
In Ajax, Ontario — population 126,666, with buried infrastructure laid down over decades and recorded unevenly — line marking is how a site gets read before anyone breaks ground. Local construction, manufacturing, utilities work drives most of the demand.
Line marking is the deliverable most excavation crews actually need: the traced position of each line put on the surface in the APWA uniform color code, with flags where paint will not hold and a field sketch carrying measured offsets to permanent features so the marks can be re-established after rain or traffic. It covers private lines past the meter, re-marks on long-running projects, and white lining — outlining the proposed dig area in white before the one-call ticket goes in, which narrows what the member utilities have to sweep and gets cleaner marks back.
Project-planning data for Ajax, ON — soil, climate, and regulatory factors that shape how locating crews scope work in this market.
Ajax sits in a humid continental climate, with winter ground freeze reaching 48 inches — frost changes what ground penetrating radar returns, and it stops paint from bonding, so cold-season work leans on recorded offsets and coordinates. Local ground: Clay, Loam. Soil conductivity is the variable that decides how much of a locate radar can contribute, because conductive ground absorbs the radar pulse instead of reflecting it. Primary industries — construction, manufacturing, utilities — drive steady demand for line marking across the Durham County area.
Ontario One Call (1-800-400-2255) requires advance notice — confirm the exact period with them before any excavation in Ontario. That notification is free and it is separate from line marking: it brings out the member facility owners to mark the lines they own, and stops at the meter or the right-of-way. Wait for every member to respond before ground is opened.
Locating is quoted per job rather than off a rate card, because the work is a search and a search scales with the site rather than with the clock. On a Ajax job, the things that move the number are how much ground has to be covered, how many targets are in play, whether there are meters, valves, risers, or panels a transmitter can be clipped to, what the lines are made of, what the local ground (clay, loam) does to the instruments, and whether you need surface marks or a record you keep.
Describe the job once through Utility Hotline. Our team reviews the request, then locating companies covering Ajax and Durham County send you their own quotes, so you are comparing them against the same scope. It is free to request.
Tell us about your project and we’ll send your request to locating companies that handle line marking in Ajax.
Get Free QuotesCommon questions about private utility locating in Ajax
Finding and marking the buried lines on the owner side of the meter, the ones a one-call ticket does not cover.
Turning a field locate into a permanent CAD, GIS, or coordinate record that outlives the paint.
ASCE 38 quality-level deliverables — records research, field designation, and test-hole verification, sealed by an engineer.
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Ontario One Call — Always call 1-800-400-2255 before excavation.
