Utility locates and OUPS before digging a pool in Ohio

Yes. The Ohio Utilities Protection Service has operated the state's call-before-you-dig center for decades, and many people in Northeast Ohio still call it OUPS. Today it goes by OHIO811. You reach it by dialing 811 or by submitting a notice online, with a homeowner version called e-dig and a professional version called i-dig. The service is free.

When a notice comes in, OHIO811 sends it to every member utility with lines in the area: the electric company, the gas company, phone and cable providers, and the water and sewer systems that are members. Each one checks its records and marks its lines at the site. OHIO811 itself does not mark anything.

Ohio rewrote its underground utility protection law through House Bill 227, and the changes took effect on June 9, 2026. For a pool project, the ones that matter are the timing rules.

• Notice window. The excavator must notify OHIO811 at least two working days before digging, not counting the day of the notice, and not more than 16 calendar days before. Working days leave out weekends and legal holidays. The old rule was 48 hours and no more than 10 working days.
• Marking window. Utilities have two working days, not counting the day of notice, to mark their lines or report that they have none at the site.
• Start window. If digging does not start within 16 calendar days of the notice, the notice is no longer good, and a new one is needed.

A practical example: a notice filed on a Monday gives the utilities Tuesday and Wednesday to respond, and digging can start Thursday. A notice filed on a Friday counts Monday and Tuesday, so digging can start Wednesday.

The person or company doing the digging. Ohio's law puts the duty on the excavator, and OHIO811 advises that the actual excavator place the notice and get its own reference number. When a pool builder is doing the excavation, the builder files the notice. A homeowner's ticket from last month's garden bed does not cover the pool crew.

This matters because the pool is rarely the only digging on the project. The electrician trenching from your panel to the equipment pad, the crew setting fence posts and anyone installing a drain line are all excavating. Each needs a valid notice covering the area where they dig.

Before notifying OHIO811, the excavator is expected to premark the proposed dig area in white, using paint, flags or stakes, so the locators know exactly where to look. For a pool, that means outlining the excavation plus some margin, the equipment pad, and the trench route for the electrical and plumbing runs.

After the locators come, you will see other colors. Ohio uses the American Public Works Association color code:

• Red: electric power lines and cables.
• Yellow: gas, oil, steam and petroleum.
• Orange: communication lines such as phone, cable and fiber.
• Blue: drinking water.
• Green: sewers and drain lines.
• Purple: reclaimed water and slurry lines.
• Pink: temporary survey marks.

Protect the marks. If a mark is destroyed or removed, the excavator must stop and notify OHIO811 again before continuing. Mowing, rain and truck traffic wipe out paint faster than you would think.

Ohio law defines the tolerance zone as the width of the utility line plus 18 inches on each side. The marks show approximate locations, not exact ones, so digging inside that zone has to be done with care, usually by hand or with soft excavation, until the line is exposed and its position confirmed.

On a pool site this comes up most with the service lines to the house. A gas service or buried electric drop often runs along the side yard, which is the same path an excavator needs to reach the backyard. Heavy equipment crossing a shallow line is a risk too, and the crew may need to plate or mat over it.

This is the part of the process most homeowners miss. OHIO811's member utilities mark the lines they own, operate or maintain. Privately installed lines are not located or marked. On a typical Northeast Ohio property, that can include:

• A gas line from the meter to a grill, fire pit, pool heater, garage heater or generator.
• Buried electric to a detached garage, shed, barn, landscape lights or a lamp post.
• Water lines to a barn or yard hydrant, and on rural lots, the line from your well to the house.
• The septic tank, distribution box and leach field lines.
• Downspout drains, sump discharge lines and old clay field tile.
• Irrigation systems and invisible dog fence wire.
• Propane lines from a buried or surface tank.

OHIO811's own guidance says that if there are visible signs of a utility, like a meter, a lamp post or a hydrant, and no marks appear for it after the waiting period, it may be an owner-responsible line, and a private utility locator should be called. Private locators use the same kinds of electronic and radar tools, and they charge for the visit.

You can help a lot here. Tell the builder about anything you know is buried: where the previous owner ran power to the shed, where the sump line empties, where the dog fence goes. Old house records, inspection reports and a look at the basement wall for pipe exits all give clues.

Sometimes a lot. A marked gas or electric service through the middle of the planned pool area means relocating the line, moving the pool or rethinking the layout. Relocating a utility service is done by the utility or a licensed contractor, takes scheduling and costs money, so it is far better to know early.

That is why we look for utilities at the design stage, before the permit site plan is final. On the site visit we note meters, service drops, cleanouts, the septic lid, the well, and any lights or outlets out in the yard, and we ask about private lines. The final notice to OHIO811 goes in just before digging, within the legal window. If a conflict shows up that we could not see, we change the plan before a machine touches the ground.

A pool build is not one dig. The main excavation happens early, but trenching for the electrical run, fence post holes and any drain lines can come weeks later. Because a notice is only good if digging starts within 16 calendar days, later work often needs its own notice, filed by whoever does that digging.

Weather is the other wrinkle. A wet Northeast Ohio spring can push an excavation start back by days at a time, and a notice filed for a Monday dig may not be used until the ground dries. If the start slips past the 16 days, or rain and traffic wash out the paint, the excavator has to notify again and wait for fresh marks. It costs nothing but time, and it is far cheaper than guessing where a line runs.

Rural properties in Portage, Trumbull, Geauga and Medina counties often have more private lines than public ones. The well line, the septic system, a propane line to the house or a heater, power run out to a barn, and farm drainage tile laid decades ago may all be on the lot, and none of it will be marked by OHIO811's member utilities. Field tile in particular tends to turn up during excavation, and it has to be rerouted or capped so it does not keep feeding water toward the pool.

OHIO811 deals with buried lines, but overhead wires matter for a pool too. An excavator's boom, a dump truck bed or a crane setting a fiberglass shell has to stay clear of power lines, and the National Electrical Code sets minimum clearances between overhead conductors and a finished pool. A service drop crossing the backyard can limit where the pool goes and how the shell is lifted in. Your electric utility can tell you what is required near its lines and whether a line can be raised, buried or temporarily covered.

Stop work and keep people away from the area. If it is a gas line and you smell gas or hear a hiss, leave the area, call 911 from a safe distance and then the gas company, and do not try to crimp or repair the line. For any damaged line, the utility needs to know right away, even for a nick in the coating that looks harmless, because damage can fail later.

Careful locating and hand digging within the tolerance zone make strikes rare. The goal of the whole process is that nobody finds a line by hitting it.