A power line or substation is on my land. Is it a data center site?

It might be, but the line or the substation on its own does not make it one. It is a good reason to take a closer look, and it is the first thing we ask about. What decides the answer is what kind of line it is, whether the grid behind it has room for a load the size of a town, and how the easement sits on your land. None of those can be judged from the fence line, and most of them are not up to the landowner.

Is it a transmission line or a distribution line?

That is the first thing to work out, and you can usually tell by looking.

Distribution lines are the ones along roads that serve homes and farms. PJM, a regional grid operator, puts their voltage at about 13,000 volts. National Grid describes them as the wooden poles that run along roads and connect to homes and businesses.

Transmission lines are bigger in every way. AEP says its transmission towers are usually about 100 feet tall, can be metal or wood, and carry larger wires than the poles in your neighborhood. FirstEnergy says transmission easements can be up to 500 feet wide and hold large wood poles, wood H-frames, concrete or steel poles, or steel lattice towers, and that transmission lines do not serve homes directly. For one new 345 kilovolt line, Evergy expects steel structures 100 to 150 feet tall, with 600 to 1,200 feet between them. A Hawaii cooperative offers a simple clue: the longer the insulators that hold the wires, the higher the voltage.

The Department of Energy lists typical transmission voltages as 115, 138, 230, 345, 500 and 765 kilovolts, and says distribution systems are typically rated below 34 kilovolts. In between sits what utilities call subtransmission, and definitions vary: the Energy Information Administration generally puts it at 69 to 138 kilovolts, while OSHA puts it at 34.5 to 69 kilovolts and notes that some utilities call these lines transmission.

For a large data center, what matters is the high voltage network. A distribution line along your road is useful to know about, but it is not what a large project would connect to.

Why can’t a data center just connect to the line crossing my land?

Because the power on a transmission line is at a voltage no building can use. PJM and AEP both explain that it has to be stepped down through transformers at a substation before it reaches a customer. Even the physical connection is engineered. AEP’s rules for connecting to its transmission system require, at a minimum, remotely controlled disconnect switches, and say a direct tap into the line may be considered only as a temporary solution in unusual cases.

Size decides how much new equipment is needed. A May 2026 report from a federal energy laboratory found that facilities under about 20 megawatts may be served from existing distribution lines, while requests above 50 to 75 megawatts often need a substation expansion or a dedicated substation. It describes the largest campuses as connecting through a dedicated substation served at transmission voltage, and estimates that new substations cost millions of dollars and take three to five years to permit and build.

So a line across your land is not a plug. It is a possible source of supply that would need a new substation, and the land to put one on.

What does a substation near my land tell me?

That the high voltage network reaches your area, which is a good start. It does not tell you whether that substation has anything to spare.

The federal laboratory report explains that a substation’s capacity is limited by the ratings of its transformers, and that adding transformers can mean more land, construction and upgrades further up the grid. Where several large users cluster, it says, their combined demand can quickly exceed what substations can carry.

That capacity gets claimed. AEP Ohio’s load study letter of November 2025 said that regional transmission upgrades would be needed for all 36 new data center projects it had studied, and that none of their roughly 13,000 megawatts of load could be reliably served until a regional project expected around the end of 2031. It kept to queue order: projects that asked first were grouped for late 2031, and later ones were given a planning date of 2033. East Kentucky Power Cooperative says it has spare regional capacity near Maysville that would likely disappear if a different data center located elsewhere in its part of the grid first.

One more thing about substations: the land under one is often not part of anyone’s farm. FirstEnergy says it commonly owns substation sites outright rather than holding an easement. If there is a substation on what you think of as your land, check your deed to see whether that parcel is still yours.

What does the easement let me build?

Usually nothing inside it. That surprises people, because it means the strip under the line is the one part of the farm a data center cannot build on.

• Dominion Energy says most of its easements specifically prohibit buildings or structures in the right of way, that it enforces this strictly, that it can require a structure to be removed, and that it does not give consent verbally.
• FirstEnergy says that unless the legal documents provide for it, no buildings, fences, barns, sheds or other structures are allowed in the right of way, that the ground level may not be changed, and that no digging is allowed within 50 feet of any of its poles or towers.
• Entergy allows only plants that stay at or under 8 feet, and reminds landowners that the easement is attached to their deed and on record at the local courthouse.

The buildings, parking and the new substation would all go beside the easement. Where the easement runs makes a real difference. A line along one edge leaves a large block of usable land. A wide easement through the middle can cut a tract into two smaller pieces. Get a copy of the easement document from the courthouse and read what it actually says, because every one is different.

How does anyone find out if the grid has room?

Only the utility can answer that, and it answers through a study, not a phone call.

Some utilities publish hosting capacity maps. The Department of Energy keeps an atlas of them, and says they give a general understanding of how much load or generation a distribution system can take at specific places, but do not answer site specific connection questions. Con Edison says the numbers on its map are an estimate only and do not replace a formal engineering study. Most of these maps cover distribution lines, not the high voltage network a large data center needs.

The study itself is built for the company that will use the power. AEP Ohio studies a data center request only when the customer controls the property, by owning, leasing or holding an option on it, and gives a specific location, load ramp and final load, and it charges a one time study fee of 10,000 to 100,000 dollars. Dominion’s process starts with the customer’s site plan, a load letter and a schedule for ramping up. ERCOT says the transmission company will ask for the expected peak demand and energization date and charge a fee to process the request. East Kentucky Power Cooperative asks data centers for an application fee of up to 250,000 dollars.

That is why the honest answer to “is my land a site” comes from a developer working with the utility, not from looking at the line. We explain the difference between being near power and having it in what powered land is.

What should I write down about the line or substation?

You do not need any of this to talk to us, but it helps.

• What the structures look like: steel or wood, one pole or two, lattice towers, roughly how tall, and how many wires.
• How far the nearest substation is, and whether it is a small fenced yard or a large one with several transformers.
• Where the easement crosses your land: along an edge or through the middle.
• The name of your electric utility or cooperative.
• A copy of the easement, if you have one.

The rest of what a site needs, from acreage to flooding and road access, is in what makes land qualify.

Where do we fit in this?

We buy or option land ourselves and develop it into sites data center companies want, and land near transmission and substations is where we start looking. We check the grid around it against public data at our own cost, and we say no to most land we look at, usually because the capacity is not there. If a line or substation is on or near your land, the county, a rough acreage and a description of what you see is enough for us to tell you where it stands.