L & M Underground, Inc., Excavation Company in Denver, CO

About

Directional Boring, trenching and utility potholing contractor with 26 years experience and a team of certified operators for excavators and directional drills. We install underground utilities including electric, fiber, water, irrigation, gas sleeves. Our excavation services are ideal for electrical, sign, lighting, solar, EV charging, cell tower, wind farm projects. Licensed and Insured in Colorado and Wyoming. Small Business Enterprise (SBE) certified with City of Denver, CDOT and RTD. Excellent Safety record. Prequalified with major utility companies, municipalities and CDOT. We work on residential, HOA, commercial, industrial, municipal, right of way and highway projects. Our services are ideal for golf courses, parks, parking lots.

Description written by the business.

Services

Excavation
Site preparation
Trenching
Utility lines
Hauling
Concrete removal

As listed on Google (56)

Directional drilling
Underground utility infrastructure
Directional boring
Fiber Optics
Fiber to the Building
Missile Boring
Open Trenching
Solar power underground conduits
Telco Outside Plant
Trenching
Utility Construction
Utility Location
Vacuum Excavators
Water service lines
Cable Pulling
Directional Boring Contractor
Fiber Optic
Fiber Pulling
Hdd Drill Rig
Horizontal Directional Boring
Horizontal Directional Drilling
Open Trench
Rock Boring
Underground Construction
Underground Contractor
Underground Utility Installations
Utility Excavation
Vacuum Excavation
EV Charging Stations Electrical Conduit and Site Works
Conduit Installations
Electric Vehicle Chargers
Hand Digging
Hdd Drill
Hydro Excavation
Rock Drilling
Sewer Lines
Underground Utility Construction
Underground Utility Installation
Concrete Cuts
Drilling Equipment
Fiber Testing
Parking Lot Lighting
Private Locates
Site Work
Solar Systems
Subsurface Investigation
Underground Pipes
Utility Locates
Irrigation
Chiller pipe
Water main line
Electrical Services and Mainline
Gas pipeline
Concrete breaking & hauling
Dirt removal
Jack & boring

What reviews mention

communication 3

Recent reviews

We reached out to L&M Underground for help with a boring scope on a fuel station we are building. David, Lori and Mike were a pleasure to work with. Their crew was on site and on time per the schedule we worked out, and their pricing was better than expected. Thank you again!!
5 of 5, 2026-08-18

Worked with L and M on a project in Boulder. The expertise that Brian and his team had on site got us through 100 ft of hard shale with an 8" pipe. These guys do what it takes to get the job done.
5 of 5, 2025-07-25

Just completed a project with L&M. Made it fast and easy. Quick Bid turn, great communication. 10 out of 10 service.
5 of 5, 2024-11-05

We recently hired L&M for a technical boring project, and they exceeded all expectations! Their team demonstrated incredible expertise, professionalism, and attention to detail from start to finish. The precision and accuracy with which they handled the job made a complex task lo...
5 of 5, 2024-09-08

L&M was a pleasure to work with from start to finish. They communicated every step of the way making the process easy for all parties involved. We look forward to working with them again in the future.
5 of 5, 2024-08-19

Hours

Mon	7 am to 5 pm
Tue	7 am to 5 pm
Wed	7 am to 5 pm
Thu	7 am to 5 pm
Fri	7 am to 5 pm
Sat	Closed
Sun	Closed

Business details

online estimates
onsite services
wheelchair accessible entrance
wheelchair accessible restroom

Contact L & M Underground, Inc.

(303) 933-1970
lmunderground.com
1830 W 64th Ln # B, Denver, CO 80221
View on Google Maps

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Data: Google Business Profile data via DataForSEO, pulled October 2026. Profile checked 2026-10-15.