St. Louis Underground Electrical Work

Trenching Isn't the Only Way to Get Wire Underground

Open trenching is the direct approach and the least expensive option per foot, but a trench through an established bed, a paver patio, or a mature tree's roots causes lasting damage.

Directional boring pulls conduit beneath the surface through small entry and exit pits rather than an open channel, so it can run under a driveway or a landscaped bed without disturbing what's on top. We walk the route before quoting, and if boring saves what you'd rather keep, that's the number on your estimate.

What Has to Happen Before Anyone Breaks Ground

A permit is required for most underground electrical work across our service area, and the inspection that matters happens while your trench is still open, before any dirt goes back in. We pull the permit, coordinate the locate through Missouri One Call, and schedule the inspection ourselves, so you're not tracking an inspector while a trench sits open in your yard. If the locate reveals a gas or water line crossing your planned route, we adjust the path before digging rather than after.

Signs the Line Feeding Your Garage or Pool Is Already Failing

Not every trenching call starts with a new project. Some start with a garage that lost power while the house didn't, or a breaker that trips only when it rains.

A handful of signs point to a damaged or failing underground line:

• A detached structure with no power while the main panel tests fine – The fault usually sits somewhere along the buried run, not at either end.
• A GFCI breaker that trips only after heavy rain – Water finding its way into a nicked cable or a cracked conduit joint.
• A cable a fence post or a landscaper's shovel already found – Exposed or nicked conductors need tracing, not just a splice.

Our electricians trace the run before recommending a full re-trench, since a nicked cable near one end sometimes needs a repair, not a new line.

What Your Yard Looks Like When We're Done

Backfill goes in over the conductor at the depth code and the inspection call for, compacted in layers instead of dumped back in at once. We also run marking tape above it, so the next person who digs in that spot, including us, knows there’s a line there before a shovel finds it.

Most single-run jobs finish digging and backfilling in a day, with restoration (seed, sod, or mulch) following once the ground settles. You get one flat-rate number after we walk the route and confirm the method, and that number holds unless the locate or the soil turns up something nobody could see from the yard.

Frequently Asked Questions About Underground Electrical Trenching

The following questions come up as we walk the yard with a homeowner before a route is marked. Ask us anything this section doesn't cover.

How Deep Does Electrical Wire Need to Be Buried?

It depends on the wiring method, not the address. Direct-burial cable requires 24 inches of cover, rigid nonmetallic conduit requires 18 inches, and rigid metal conduit requires as little as 6 inches.

Does Running Underground Electrical Wiring Require a Permit?

Yes, in nearly every jurisdiction across the metro. The inspection must occur while the trench is open, since conductors can't be verified once the dirt is back in.

Can Directional Boring Avoid Digging Up My Whole Yard?

Often, yes. Boring pulls conduit under a driveway or a planted bed through small entry and exit pits, and soil conditions and run length decide whether it makes sense for your project.

What Happens If a Landscaper or Fence Company Hits a Buried Line Later?

Marking tape placed above the conductor during backfill warns the next crew before their equipment reaches the line. A locate through Missouri One Call before any future digging is still required, and it's the step most callers to our office admit they skipped.