Spent the weekend fixing irrigation lines and narrowly avoided a disaster

I had almost this exact scare two summers ago when planting a row of arborvitae along my property line. My shovel struck a feeder feeding our detached garage barely five inches down—no warning tape, no conduit, just raw wire sitting right under the sod. Shifting your sprinkler line avoids the immediate disaster, but leaving a main service line that shallow would keep me up at night. If someone rents a heavy core aerator or an edger down the road, they could slice right into it. What I ended up doing was calling my utility to pull the meter for a day, rented a mini trencher from Home Depot, and ran new line inside 2-inch Schedule 40 PVC buried a full 18 inches down. I also laid bright red detectable marking tape about six inches below the turf before backfilling. If pulling new wire isn't an option right now, a trick an old electrician neighbor gave me was placing cheap concrete patio pavers directly over the shallow section before throwing the dirt back over it. That way, if anyone takes a spade to that spot in the future, they hit solid concrete instead of 200 live amps.

Before you assume you have to spend thousands ripping up the yard to re-trench to code, call your electric utility. When I hit a shallow direct-bury feed near my driveway a few years back, I called Consumers Energy fully expecting a fight and a massive quote. Turns out the entire run from the street transformer up to the meter base was their property and responsibility. They sent a crew out two days later and directional-bored a brand new line 36 inches down through heavy clay, completly free of charge.

If you check and it actually is on your side of the meter, another practical fix my electrician suggested around mature tree roots is laying pre-cast concrete patio pavers right on top of the cable before backfilling the turf. It won't magically put the wire down to 24 inches, but it gives you a solid physical barrier so the next guy with a spade or a core aerator hits concrete instead of live conductors.

Glad you didn't get zapped. I'd defintely take a flashlight and inspect the exact spot your shovel hit, though. Even if you don't see bare metal, a tiny nick in that outer jacket'll let moisture seep in and slowly rot out the conductor untill it randomly faults out next winter.

Half the time with these older houses, the wire wasn't even laid that shallow on purpose. Decades of erosion or some prior owner regrading the yard ussually stripped off four or five inches of topsoil without anyone ever realizing it.