Rock Drilling

Specialized trenchless drilling through hard rock formations where
conventional methods fail. JAG Enterprises has the equipment and experience to
complete utility installations in the most challenging geological conditions across the Mountain West.

Rock drilling operation for a utility installation in hard formation — southeastern Idaho

- Overview

What Is Rock Drilling?

Rock drilling is a specialized trenchless technique used when underground utility installations encounter hard rock formations that standard boring or directional drilling equipment cannot penetrate. JAG Enterprises uses purpose-built rock drilling equipment designed to cut through granite, basalt, sandstone, and other hard formations common throughout the Mountain West.

The Mountain West presents some of the most geologically challenging terrain for underground utility work in the country. Volcanic basalt, fractured granite, and mixed rock and cobble formations are common across Idaho, Montana, Nevada, Utah, and Wyoming — and require specialized equipment and experienced crews to navigate successfully.

JAG Enterprises brings both the equipment and the regional expertise to complete rock drilling projects on time and on budget — whether it's a single crossing or a multi-phase infrastructure project across difficult terrain.

Formation Types

Basalt, granite, sandstone, mixed

Method

Rotary/percussive rock drilling

Application

Utility crossings, conduit installation

Surface Disruption

Minimal — trenchless

- How It Works

Geological Assessment

Before drilling begins the formation type and hardness are assessed. This determines the correct drill bit type, rotation speed, and thrust pressure needed to efficiently penetrate the rock without damaging equipment.

Pit Preparation

Entry and exit pits are excavated at each end of the bore path. The drilling rig is positioned and aligned precisely on the required line and grade before drilling begins.

Rock Drilling

Purpose-built rock drilling equipment advances through the formation using rotary cutting, percussive impact, or a combination of both depending on rock type and hardness. Drill cuttings are flushed back to the entry pit continuously throughout the operation.

Bore Stabilization

In fractured or unstable rock formations the bore annulus may be stabilized with grout or casing to prevent collapse before the carrier pipe is pulled through.

Pipe Installation

Once the bore is complete and verified the carrier pipe, conduit, or casing is pulled through the rock bore. Entry and exit pits are backfilled and the surface is restored.