Standard & Complex Septic Tank Repair & Installation Services

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Office:Contact A3 Underground, Boise, Idaho Septic Contractor    Cell:Contact A3 Underground, Boise, Idaho Septic Contractor
We Serve Customers Throughout Washington & Adams County, Idaho

Cambridge - Midvale - Weiser - Council - New Meadows - Mesa - Alpine - Fruitvale

The Best Choice for Expert Septic System Installation & Repair, Grading, Excavating, and Demolition In & Near Cambridge & Midvale, Idaho

A3 Underground Construction provides high-quality, cost-effective septic tank installation and repair, trenching digging, water drainage solutions, and grading, excavating, and demolition services for Cambridge, Midvale, New Meadows, Council, Mesa, and surrounding areas. As a licensed septic tank installer with over 30 years of experience, a highly trained staff, and a fleet of well-maintained equipment, we are fully integrated to handle septic system and excavation jobs of nearly any size, from repairing a septic tank in Mesa, to trenching for cable lines in Midvale and installing an alternative septic system in Cambridge. Because of our exceptional work ethic, honest advice, and competitive prices, we have earned the respect and repeat business of thousands of satisfied residential, agricultural, and commercial clients.

One Call Does It All - Comprehensive Septic System Design, Installation and Repair for Homes, Estates, Farms, Ranches, Industrial Facilities & Businesses in Cambridge, Midvale, Mesa, Weiser, Council & Surrounding Areas

At A3 Underground Construction, we have the skills, expertise, and hands-on experience to deliver a full range of septic system services for properties of all kinds in and near Cambridge, Midvale, and Mesa. Whether you are needing to replace a failed septic tank, add leach lines, or install a new complex or advanced septic system, we can handle all the details from start to finish. Our dedicated staff are experts in site evaluation and planning, and can assist you in determining the ideal location and design for your septic system, drain field, and piping. If necessary, we can even pull building permits for your property. We can also work with existing design spec from your preferred building contractor.

State-Certified Complex Septic System Installer Serving Cambridge, Midvale, and Mesa, Idaho

In addition to being qualified to install and replace standard septic systems, we are licensed by the State of Idaho to install and repair complex septic systems. These alternative sewer systems are required in certain counties that are affected by high ground water, uneven terrain, and unique soil types. Our experienced team always stays up to date on the latest and best practices related to all types of on-site wastewater systems, including:

  • Aerobic septic systems
  • Nitrogen reduction systems
  • Microbic systems
  • At-grade soil absorption systems
  • Drip distribution systems
  • Large soil absorption systems
  • Drainfield remediation components
  • Individual lagoons
  • Pressure distribution and transport systems
  • Evapotranspiration systems
  • And More . . .

Contact us today for more information. We provide convenient on-site estimates and personalized consultations for complex septic system installations throughout Midvale, Mesa, and Cambridge.

Utility Trenching for Sewer, Gas, Cable, Electric, Stormwater, and Telecommunications, Including Large Cable Trenching and Joint Trenching for Stacking Multiple Utility Lines

Our trench digging services are available throughout Midvale, Mesa, and Cambridge. We offer superior workmanship on digging trenches for storm, sewer, electric, cable, gas, and power lines, and are experts at integrating utility trenching into new and existing septic systems. Over the years we have worked with thousands of general contractors, homeowners, and commercial businesses, who trust us to consistently deliver expert trenching services at cost-effective prices. We can also dig trenches for retaining walls, concrete footings, and foundations.

We're Experts in Designing & Installing Culverts, Adjustable Spillways, Retaining Ponds, French Drains, Trench Drains, Well-to-Field Piping, Pivots, and Drywalls for Midvale, Mesa, and Cambridge Properties

For high quality, competitively-priced stormwater management and drainage solutions, call on A3 Underground Construction. All of our culverts, drains, spillways, and drywalls are constructed from premium-grade steel, concrete, or galvanized metal, and are carefully designed and installed to be long-lasting, durable, and high functioning. In addition, with over 3 decades of experience, our reliable team can provide accurate advice on choosing the best drainage system for your needs and your property's unique terrain. Give us a call today to speak to a friendly staff member, who can schedule a personalized on site consultation anywhere in or near Cambridge, Midvale, and Mesa.

Trusted Demolition Contractor and Excavator With Over 3 Decades of Experience

We offer a full range of grading, excavating, and demolition services to clients throughout Mesa, Cambridge, and Midvale. Whether you are a private homeowner or a general contractor, you can rely on A3 Underground Construction for all your demolition and excavating needs. We're qualified to provide backhoe services, dirt compaction, building site preparation, swimming pool removal, lot clearing, tree removal, ground leveling services, and grading for building pads, driveways, walkways, and roads. Our well-maintained fleet of excavators, skid steers, backhoes, and dump trucks can make short work of most size jobs, and our expert operators are always friendly, efficient, and dependable.

Convenient On Site Estimates and Competitive Bids for Cambridge, Mesa, Midvale, and Nearby Areas

Call today to learn more! A member of our knowledgeable staff would be pleased to answer any of your questions and schedule you an on site assessment with one of our experienced estimators.

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For fastest response, please call (208) 257-3208, (208) 630-3017


Highly professional, always a great job for a fair price. You can't go wrong with this company for your excavation needs.

Linda Coyle Standifer Via Facebook Review

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10 Reasons to Choose A3 Underground Construction
  • Over 3 Decades of Experience
  • Fully Licensed & Installed Excavation Contractor
  • Locally & Family Owned Business
  • One of the Few Certified Complex System Installers in the Boise Metropolitan Area
  • Extremely Helpful and Knowledgeable Staff
  • We Can Handle Every Aspect of Your Project
  • Complete Site Evaluation and Planning Services
  • Exceptional Workmanship at a Competitive Price
  • All Work Performed in Compliance with Relevant Building Codes & Permitting Regulations
  • Jobs Are Completed On Time & On Budget
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We provide septic, grading, excavation, trenching, and drainage services throughout Adams & Washington County, including but not limited to:

  • Cambridge, ID
  • Midvale, ID
  • Weiser, ID
  • Council, ID
  • New Meadows, ID
  • Alpin, ID
  • Fruitvale, ID
  • Mesa, ID
  • Meadows, ID
  • Starkey, ID
  • Bear, ID
  • Beer Bottle Crossing, ID
  • Cuprum, ID
  • Devils Ladder, ID
  • Glendale, ID
  • Goodrich, ID
  • Helena, ID
  • Indian Valley, ID
  • Wildhorse, ID
  • Woodland, ID
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