There are half a dozen ways to put a utility underground, and the right one is decided by surface, soil, depth, and length — not by preference. Here's the honest comparison the industry actually uses.
The lineup
| Open cut | Dig, place, backfill. Cheapest per foot in open ground; pays for itself in restoration wherever the surface matters. |
|---|---|
| Directional drilling | Steerable bore under anything. The default for crossings and finished surfaces. |
| Cable plowing | A vibrating blade slices the ground and feeds cable or duct in one pass. The production king for long rural routes — miles per day in the right ground. |
| Micro-trenching | A shallow, inches-wide saw cut in pavement for fiber. Fast and tidy in the right city, controversial at shallow depths. |
| Jack-and-bore | Unsteered casing pushed under roads and rail by auger. The traditional highway-crossing method where authorities require casing. |
| Pipe bursting | Replacement, not new install: a bursting head shatters the old pipe while pulling the new one through its path. |
How the choice really gets made
Long rural fiber route in open ground? Plow it, and bore the road and creek crossings. Subdivision with utilities in shared easements? Open-cut joint trench. Downtown block where the street can't close? Bore or micro-trench. Failed water main under pavement? Burst it or drill a parallel main. Every real project mixes methods segment by segment — the estimate sheet, not ideology, decides.
The cost logic
Per-foot cost usually ranks: plowing < open cut (rural) < micro-trench < HDD < jack-and-bore — but total installed cost including restoration, traffic control, and schedule re-orders that list on any hard surface. The full pricing anatomy is in the boring cost guide.