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 Valley & Adams County, Idaho

McCall - New Meadows - Donnelly - Alpine - Big Creek - Cascade - Council - Mesa
- Glendale - Goodrich - Helena - Smiths Ferry - Woodland

Highly Experienced Excavation Contractor & Septic System Installer, Serving McCall, New Meadows, Donnelly, and Nearby Areas

A3 Underground Construction is a licensed and insured excavation contractor with over 30 years of specialized experience working on septic systems. We serve residential, commercial, industrial, and agricultural clients throughout New Meadows, Donnelly, McCall, and the surrounding areas. Our wide range of services includes:

  • Septic System Design and Installation Services
  • Site Evaluation and Planning
  • Septic Tank Installation (Plastic, Fiberglass, and Concrete Septic Tanks)
  • Septic Tank Relocation Services
  • Septic Tank Repair and Replacement
  • Alternative Complex Septic Systems
  • Septic Tank Manual and Electronic Locating
  • Septic Tank Enzyme Treatments
  • Leach Field Design and Installation
  • Leach Line Additions
  • Stormwater Management Services
  • Field Piping, Retaining Ponds, Concrete Spillways, and Culverts
  • French Drains, Trench Drains, Grease Traps and Interceptors
  • Short and Long Run Utility Trenching
  • Joint Trenching and Large Cable Trenching
  • Backhoe Services
  • Grading for Driveways, Building Pads, and Walkways
  • Excavation and Mass Excavation
  • Land Clearing and Tree Removal
  • Demolition & Hauling Services

Call us today to arrange for an on-site consultation with one of our experts. Whether you need to install a complex septic system at your New Meadows private estate, grade a lot for a new driveway in Donnelly for your ranch, or put in a retaining pond at your property in McCall, we have the skills and expertise to deliver exceptional results at a cost-effective price.

Honest Prices on Septic System Design and Installation Services For McCall, New Meadows, Donnelly, and Nearby Areas

As a full service septic system installer, we are qualified to design and install any standard or complex septic system. We will handle every aspect of your job, from pulling building permits, analyzing soil samples, and designing leach fields, to offering accurate advice on the ideal septic tank and system for your property. In addition, we are one of the few septic companies certified by the State of Idaho to install and repair complex septic systems, such as aerobic, nitrogen reduction, microbic, and large soil absorption systems.

Expert Septic Tank Repairs, Leach Line Additions, Septic Tank Locating and Excavation, Septic Tank Riser and Lid Installation, and More for New Meadows, McCall and Donnelly

For experts in septic tank repair, call on A3 Underground Construction. We offer a full range of septic tank repair services to McCall, New Meadows, Donnelly, and surrounding areas. Whether you are experiencing wet spots in the drainfield, backed up plumbing, or foul odors, our reliable team has the expertise and extensive industry knowledge to accurately troubleshoot the exact cause of your septic system failure and provide a long-lasting, cost-effective solution. We can even help you locate your septic tank using electronic or manual locating, and can efficiently excavate the lid to gain access to your system. In addition to septic tank repairs and locating, we also offer septic tank riser installation, septic tank enzymes, septic tank relocating, and inlet/outlet tee replacements.

Providing New Meadows, McCall and Donnelly with the Best Value in Underground Trenching Services For Sewer, Storm, Gas, Water, Cable, Electric, and Telecommunications Lines

A3 Underground Construction is a preferred choice for high quality, code-compliant trench digging services in and near Donnelly, New Meadows, and McCall. Over the years thousands of satisfied residential clients have come to rely on us for our expert workmanship, honest prices, and hands-on expertise. Whether you need utility trenching, sewer line trenching, or large cable trenching, we have the skills, equipment and knowledge to get the job done on time, in budget, and to the highest industry standards. We are also highly experienced at integrating utility trenches into existing and new septic systems. This means we can design and construct the optimal utility layout for your property, whether that includes relocating your septic tank, grading for better drainage, or joint trenching to efficiently stack multiple utilities in a single trench.

Comprehensive Agricultural Drainage Solutions for New Meadows, McCall, and Donnelly, Idaho

A3 Underground Construction is an expert in agricultural drainage systems, including culverts, adjustable concrete spillways, French drains, trench drains, pivots, retaining ponds, private lagoons, and more. Whether you have a farm, ranch, or estate, we can be counted on to come up with a comprehensive, cost-effective, and reliable drainage solution to address your specific needs. Call us today to schedule an on-site evaluation anywhere in or near New Meadows, McCall, and Donnelly.

Grading, Excavating, and Demolition Services for New Meadows, McCall, Donnelly, and Surrounding Areas

Along with designing, installing, and repairing essential stormwater management systems, we can also provide complete grading, excavating, and demolition services. This includes backfilling, debris hauling and removal, and digging for retaining walls, concrete footings, foundations, sewers, and ponds. Whether you are looking for land clearing and tree removal services in New Meadows or ground leveling services to prepare a site for new construction in McCall, you can rely on A3 Underground Construction to provide an effective, high-quality solution at a great price.

On-Site Estimates, Competitive Bids, and Personalized Consultations for Property Owners, Ranchers, Farmers, and Commercial Businesses Throughout Valley and Adams County

Contact us today to schedule a convenient onsite assessment with one of our experienced and knowledgeable estimators. We are ready to travel to nearly any location in McCall, New Meadows, Donnelly, and surrounding communities throughout Adams County and Valley County.

A3 Underground Construction McCall, New Meadows, Donnelly - 83638, 83654, 83615 California (CA)
Area code (208)
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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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A3 Underground Construction provides septic, grading, excavation, trenching, and drainage services throughout Valley County and Adams County including but not limited to:

  • Alpine, ID
  • Bear, ID
  • Big Creek, ID
  • Cascade, ID
  • Council, ID
  • Cuprum, ID
  • Donnelly, ID
  • Fruitvale, ID
  • Glendale, ID
  • Goodrich, ID
  • Helena, ID
  • Indian Valley, ID
  • McCall, ID
  • Meadows, ID
  • Mesa, ID
  • New Meadows, ID
  • Smiths Ferry, ID
  • Starkey, ID
  • Yellow Pine, ID
  • Lake Fork, ID
  • Roseberry, ID
  • Warm Lake, ID
  • Wildhorse, ID
  • Woodland, ID
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