Every responsible excavation project in Ohio starts with a call to 811, the free utility-locating service that marks the public utilities before anyone digs. That call is essential and legally required, and it protects against the worst-case strikes on gas mains, electric, water, and communications lines. But here is what a lot of homeowners do not realize: 811 marks the public, primary utilities. It does not mark the many secondary and private lines that crisscross a typical residential property, and those unmarked lines are exactly where a lot of excavation surprises happen. Understanding what is at stake when equipment hits an unmarked secondary utility, and how a careful contractor avoids it, is part of digging on your property responsibly.
What 811 Does and Doesn't Cover
The 811 system is designed to locate and mark the public utility lines that run to and across your property, the gas service, electric, water, sewer, and telecommunications lines owned and maintained by the utility companies. When you call before digging, those companies send locators to mark their lines, and this dramatically reduces the risk of catastrophic strikes. But 811 locators are generally only responsible for the utility-owned lines up to the meter or point of service. They do not locate the private lines beyond that point, the secondary utilities that a homeowner or previous contractor installed and that no utility company knows about. Those are invisible to the 811 system, and they are everywhere on a developed property.
The Secondary Lines That Catch People
The list of unmarked private utilities on a typical property is longer than most people expect. There is the gas line running from the meter out to a detached garage, a pool heater, a fire pit, or a backup generator. There is the electric line feeding a shed, a detached garage, landscape lighting, or a pool. There is irrigation piping for a sprinkler system, often shallow and spread across the whole yard. There are invisible pet fence wires buried just below the surface. There is private water line to an outbuilding, low-voltage wiring, and sometimes private septic or drainage components. None of these are marked by 811, because none of them are owned by a utility company. They were installed privately, the records are often lost or were never kept, and they sit waiting underground where an excavator has no way to see them.
What a Strike Actually Costs
The consequences of hitting an unmarked secondary line range from annoying to genuinely dangerous. Hitting a private gas line, to a generator or pool heater for example, is the most serious, because it creates a gas leak and a real safety hazard, even if the line is smaller than a main. Striking a private electric feed can be a shock and arc hazard and knocks out power to whatever it served. Cutting irrigation lines or invisible fence wire is not dangerous but means repairs the homeowner did not budget for. Beyond the immediate hazard, there is the question of who pays. Repairs to a damaged private line, restoration of service, and any resulting damage can become a dispute between the homeowner and contractor, especially when it was not clear up front who was responsible for identifying private lines and how the dig would account for them. A strike that injures someone raises the stakes far higher.
Who Is Responsible
Responsibility for a secondary-utility strike depends on the circumstances and what was discussed up front, which is exactly why it should be discussed up front. The 811 call is mandatory and the contractor must make it, but because 811 does not cover private lines, the homeowner often has knowledge of those lines that the contractor does not, where the generator line runs, where the sprinkler system is, whether there is an invisible fence. A responsible contractor asks about known private utilities before digging and proceeds carefully in areas where they might exist, and a responsible homeowner shares what they know. When both parties communicate, private lines can be located or hand-exposed before the machine gets near them. When nobody asks and nobody tells, a strike becomes a finger-pointing dispute. Clear communication before the dig is the best protection for everyone.
How Careful Excavation Avoids the Strike
At Shawn's Landscape & Design, avoiding utility strikes is built into how we approach a dig, not left to luck. We make the required 811 call on every project, without exception, so the public utilities are properly located and marked. Beyond that, we ask you about known private and secondary lines on your property, the generator feed, the irrigation, the invisible fence, the line to the shed, so we can account for them. In areas where private lines may exist or where the marked utilities run close to our work, we dig carefully and hand-expose where appropriate rather than driving a machine blindly into uncertain ground, the same careful, investigate-first approach we bring to subsurface conditions in our discussion of knowing what is underground before digging. Responsible excavation and site prep means respecting what you cannot see and taking the time to find out where it is.
Bottom Line: 811 Is the Floor, Not the Whole Job
Calling 811 before digging is mandatory and it prevents the worst utility strikes, but it only marks the public utilities. The private, secondary lines, gas to a generator, electric to a shed, irrigation, invisible fence, are invisible to the system and are exactly where excavation surprises happen. Hitting one ranges from an unbudgeted repair to a genuine safety hazard, and who pays for it comes down to whether the lines were communicated and accounted for before the dig. The best protection is a contractor who makes the 811 call, asks about private lines, and digs carefully near uncertainty, paired with a homeowner who shares what they know. We treat the ground with the respect that the things you cannot see deserve.