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 Payette, Gem & Washington County

Cambridge - Emmett - Fruitland - Hamilton Corner - Letha - Midvale - New Plymouth - Ola - Payette - Sweet - Weiser

Expert Septic Tank Installation & Repair, Grading and Excavating Contractor Serving New Plymouth, Emmett, Weiser, and Nearby Areas

A3 Underground Construction is your best source for septic system installation and repair, grading, demolition, and trenching anywhere in or near New Plymouth, Emmett, and Weiser. We are a fully licensed and insured septic system installer and excavation contractor with over 30 years of experience and thousands of satisfied customers. Our clients trust us because we always provide exceptional workmanship, personalized customer service, and very competitive prices. We offer everything from agricultural field piping and drainage solutions, to complex septic system design and installation, to large cable and joint trenching services.

Contact us today to learn more about our septic tank and excavation services in Emmett, Weiser, and New Plymouth.

We Have Installed and Repaired Thousands of Septic Tanks For Residential, Agricultural, and Commercial Properties

Our comprehensive septic system and underground construction services are ideal for homes, estates, farms, ranches, retail stores, warehouses, industrial facilities, and commercial businesses throughout New Plymouth, Emmett, and Weiser. They include:

  • Septic System Engineering and Installation, and Repair
  • Complex Septic System Installation, Including Aerobic/Nitrogen Reduction Systems
  • Septic Tank Installation and Repair
  • Septic Tank Locating
  • Septic Tank Enzyme Treatments
  • Leach Field Design and Installation
  • Leach Line Additions
  • Site Evaluation and Planning Services
  • Stormwater Management Systems
  • Agricultural Field Piping, French Drains, & Trench Drains
  • Culverts and Retaining Ponds
  • Concrete Spillways
  • Grease Traps/Interceptors
  • Utility Trenching and Digging
  • Joint Trenching, Large Cable Trenching, and Sewer Trenching
  • Backhoe Services
  • Excavating, Grading, and Demolition Services

Over 30 Years of Experience in Septic System Design and Installation Services

Our expert staff have the hands-on expertise to work on a wide range of underground construction jobs, from digging trenches for sewer lines in Weiser, to repairing a cracked septic tank in Emmett. As a full-service septic system company, we are qualified to handle all the details, including pulling permits, evaluating your site, planning and designing new septic systems, installing leach lines, trenching for utilities, and more. In addition, we are one of the few septic tank companies that is licensed by the State of Idaho to install, repair, and maintain complex septic systems, such as aerobic, nitrogen reduction, and microbic systems.

Code-Compliant Trench Digging for Sewer, Water, Gas, Phone, Cable, Storm, and Electric, Telecommunications Lines, Irrigation Systems, and More

We provide reliable utility trenching for New Plymouth, Emmett, Weiser, and surrounding areas. Our trench services include short and long run utility trenches, large cable commercial and industrial trenches (up to 4-5 inch conduits), joint trenches, and trenches for retrofit and changed utilities. Because all jobs are owner-supervised, you can rest assured that every job will be completed on time, on budget, and to extremely high industry standards, and comply with all relevant county and city building codes.

Cost Effective Excavation, Grading, and Demolition Services for Building Contractors, Private Property Owners, Farmers, Ranchers, and Commercial Businesses

Whether you need backhoe services, tree removal, building site preparation, dirt compaction, or grading for a new driveway, call A3 Underground Construction. We have the skills, qualified staff, and equipment to deliver the best value on excavating, grading, and demolition services in and near New Plymouth, Emmett, and Weiser. Our services also include digging new footings for foundations, removing and hauling debris, clearing lots, digging ponds and sewers, home demolition, and swimming pool removal.

Give Us A Call Today for Any of Our Excavating or Septic System Services! We Offer On-Site Estimates and Accurate Quotes for New Plymouth, Emmett, Weiser, and Surrounding Areas

A3 Underground Construction is dedicated to fulfilling the unique needs of our clients, whether that means installing a replacement septic tank in New Plymouth, building a culvert and retaining pond in Emmett, or designing and installing an entirely new advanced septic system in Weiser. Contact us today to schedule an on-site consultation.

A3 Underground Construction Plymouth, Emmett, Weiser - 02360, 83617, 83672 California (CA)
Area code (208, 508, 774)
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For fastest response, please call (208) 257-3208, (208) 630-3017


They have done many jobs for me and friends Always happy with the work done!

Susan Haggard 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 the counties of Payette, Gem, and Washington, including the following cities and communities:

  • Cambridge, ID
  • Emmett, ID
  • Fruitland, ID
  • Hamilton Corner, ID
  • Letha, ID
  • Midvale, ID
  • New Plymouth, ID
  • Ola, ID
  • Payette, ID
  • Sweet, ID
  • Weiser, ID
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