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Black Mountain Excavation
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Crew working in a trench, fitting a red valve onto a blue water main

Building the backbone of modern infrastructure

Underground utilities

Water, sewer, storm, electrical, and telecom installed and rehabilitated to engineered plans. Safety-first underground utility work across Colorado.

Black Mountain Excavation

What you don’t see matters most

In today's world, what you don't see is as important as what you do. Underground utilities are the lifelines of a community, quietly powering homes, delivering water, carrying waste away, and keeping people connected.

Whether for residential developments, commercial complexes, or large infrastructure, we install and rehabilitate underground systems with precision and efficiency, from water and sewer lines to storm drainage and underground detention.

We are fully licensed, bonded, and insured, for the safety and protection of our clients and our crews.

Every line, every pipe, installed with precision

Comprehensive utility capabilities

We install and manage the full range of underground systems: water, sewer, electrical, and telecommunications. Sanitary or storm, conduit for power, or fiber-optic readiness, each solution is tailored to the project scope and engineering requirements.

Our crews work closely with municipalities, developers, and contractors for efficient, code-compliant results that last.

  • Water and sanitary sewer
  • Storm drainage and underground detention
  • Electrical conduit and duct banks
  • Fiber and telecommunications
  • Utility vaults and structures
  • Tie-ins to existing systems
Multiple gray conduits sweeping through a trench with an excavator behind

Colorado's go-to partner for underground utility excavation

Trusted to dig deeper

Developers, utility providers, and civil contractors across Colorado choose Black Mountain Excavation for large-scale expertise, safety-first execution, and rock-solid reliability. We bring the manpower, precision, and equipment to keep utility projects moving, whether you're breaking ground on new infrastructure or upgrading what's already there.

Crew lowering into a trench box in a residential alley, one worker on the ladder and two watching from the edge

Expert installation, start to finish

Strength below the surface

  1. STA 0+00

    01Survey and map

    Site surveying and utility mapping identify existing systems and potential conflicts.

  2. STA 1+00

    02Trench or bore

    Advanced trenching and boring methods keep surface disruption to a minimum.

  3. STA 2+00

    03Install

    Conduit and pipe go in to the engineered plans.

  4. STA 3+00

    04Backfill and compact

    Proper backfill and compaction stabilize the site.

  5. STA 4+00

    05Test and inspect

    Pressure testing, alignment checks, and final inspections meet every regulatory standard.

Underground utilities

Strength below the surface. Reliability above it.

What you don't see matters as much as what you do. Underground utilities quietly power homes, deliver water, carry waste away, and keep people connected.

Every job starts with site surveying and utility mapping to find existing systems and conflicts. Then trenching or boring, installation to the engineered plans, backfill and compaction, and pressure testing, alignment checks, and final inspection.

Underground utilities
Cross-section of underground utilitiesSoil layers below a paved surface, with locate paint marks above each utility, a proposed excavation outline, and electrical conduit, fiber, potable water, and a sloped sewer line running through the ground.Electrical conduitFiber and telecomPotable waterSanitary sewer and storm

APWA uniform color code for marking buried utilities

  • Red: Electric power lines, cables, conduit, and lighting cables
  • Yellow: Gas, oil, steam, petroleum, or gaseous materials
  • Orange: Communication, alarm or signal lines, cables, or conduit
  • Blue: Potable water
  • Green: Sewers and drain lines
  • Purple: Reclaimed water, irrigation, and slurry lines
  • Pink: Temporary survey markings
  • White: Proposed excavation

Safety-first approach

Excavating near live utilities demands the highest level of caution. Crews follow strict protocols including pre-dig utility locates, daily safety briefings, trench shoring, and confined space procedures, with a zero-incident mindset on every job.

Compliance you can trust

Underground utility work in Colorado has to meet local, state, and federal requirements. Our team stays current on OSHA and DOT protocols, municipal permitting, EPA environmental compliance, and technical standards like the National Electrical Code and telecom guidelines.

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Related work

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Contact us today

Strength below the surface. Reliability above it.

Partner with Black Mountain Excavation for underground utility installation built to the highest standards of safety, performance, and durability.

Request a quote(720) 753-8234

Monday to Friday, 8am to 5pm