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 Canyon County, Idaho

Nampa - Middleton - Caldwell - Greenleaf - Melba - Notus - Parma - Wilder - Star
- Bowmont - Huston - Riverside - Roswell - Sunnyslope

Exceptional Septic System, Water Drainage, and Excavation Services for Nampa, Caldwell, Middleton, and Nearby Areas

A3 Underground Construction is a licensed excavation and septic system contractor serving Nampa, Caldwell, Middleton, and other cities throughout Canyon County. We offer high quality septic system installation and repair, underground drainage solutions, and trenching, grading, and excavating services at very competitive prices. With over 30 years of experience, extensive industry knowledge, and a fleet of well-maintained demolition and construction equipment, we're able to handle a full range of septic system, sewer, and stormwater management services, as well as comprehensive utility trenching, excavating, backhoe services, agricultural field piping, and more.

Over 3 Decades of Experience and Thousands of Satisfied Residential, Agricultural, and Commercial Clients

Whether you need complex septic system design and installation for your ranch in Middleton, large cable trenching for your warehouse in Nampa, or grading & excavating for your estate in Caldwell, we have the skills and expertise to get the job done quickly, affordably, and to the highest industry standards.

Our wide range of services are ideal for most residential, agricultural, and commercial applications, including:

  • Septic System Planning, Design, Installation, and Repair/Replacement
  • Complex Septic System Installation for Aerobic, Nitrogen Reduction, Microbic Systems, and More
  • Septic Tank Installation
  • Septic Tank Repair
  • Septic Tank Locating (Manual and Electronic)
  • Stone Drainfield Installation and Repair
  • Adding Leach Lines
  • Agricultural Drainage Solutions
  • Culverts and Field Piping
  • Retaining Ponds and Spillways
  • French/Trench Drains
  • Grease Traps. Interceptors, and Sewage Lines
  • Trenching Digging for Utilities
  • Joint Trenching for Stacking Utilities
  • Large Cable Trenching (up to 4-5 inch conduits)
  • Backhoe and Grading Services
  • Clearing Lots and Building Pad Preparation
  • Excavation and Mass Excavation

State Licensed to Repair, Maintain & Install Complex Aerobic, Nitrogen Reduction, and Microbic Septic Systems for Nampa, Caldwell, and Middleton Customers

As a testament to our scope of experience and in-depth knowledge of septic, sewer and drainage systems, A3 Underground Construction is one of the few septic tank companies that has been certified by the State of Idaho to install, repair and maintain complex septic systems. This means we are qualified to work on aerobic systems, nitrogen reduction systems, microbic systems, central and large soil absorption systems, and more. If you live or own property in one of the many counties in Idaho that requires installation of an alternative septic system (often because of high ground water or difficult terrain), give A3 Underground Construction a call today. We will visit your property and provide you with a comprehensive assessment, personalized design consultation, and competitive bid.

Septic Tank Repair & Replacement, Septic Tank Locating, and Septic Riser/Lid Installation Services for Caldwell, Nampa, and Middleton at Great Rates

Over the years we have installed, repaired and replaced thousands of septic tanks for a wide range of properties, including private homes and estates, ranches and farms, industrial buildings, retail stores, restaurants, storage facilities, and warehouses. If you are experiencing symptoms of septic system failure, such as wet spots in the drainfield, foul odors, or backed up plumbing, give us a call today. With over 3 decades of hands-on experience and industry knowledge, our reliable team are experts at correctly diagnosing the cause of septic system failures. Once we determine the cause of the problem, we will provide a cost-effective solution, whether that means adding leach lines, replacing inlet/outlet tees, removing tree roots from sewer lines, or replacing a collapsed tank. Even if you don't know the location of your septic tank, we can find it for you using manual or electronic locating, then excavate the lid to gain access to your system. If you are looking for the best value in septic system repair and replacement services in the Caldwell, Nampa, and Middleton area, call A3 Underground Construction today.

Utility Trenching for Water, Cable, Telecommunications, Sewer, Gas, Electric, and Storm, Including Joint Trenching and Large Cable Trench Digging, Available Throughout Nampa, Caldwell & Middleton, Idaho

For high quality workmanship from an experienced demolition contractor and excavator, call on A3 Underground Construction. Our trench digging services are available throughout Nampa, Caldwell, Middleton, and nearby areas, and are some of the best you'll find anywhere. In addition to standard utility trenching, we also offer joint trenching (for stacking multiple utilities in a single trench), large cable trenching (for up to 4 to 5 inch conduits), trenching for culverts and spillways, and more. Our team can also assist you in site evaluation and planning. After thoroughly assessing your property's terrain, we will design and construct the ideal layout to efficiently connect your utility lines into a new or existing septic system, sewage system, drainage system, and your building's utility or power panel.

Drainage and Stormwater Management Solutions for Farms, Ranches, Ranchettes, and Estates

Our comprehensive drainage solutions and stormwater management services for Nampa, Caldwell, and Middleton include expert installation, repair, and maintenance of culverts, adjustable concrete spillways, retaining ponds, french drains, trench drains, retaining walls, private lagoons, and agricultural field piping. By using premium-grade materials and the industry's best practices, we ensure that your water drainage systems are built to last. In addition, with our years of hands-on expertise and knowledge, we are experts at constructing piping and drainage with the ideal grading for efficient water run-off.

Experienced and Reliable Excavation Contractor Serving Middleton, Caldwell, Nampa, and Nearby Areas: Grading, Excavating & Demolition Services

When it comes to grading, excavating, and demolition services in Caldwell, Nampa, and Middleton, A3 Underground Construction is the best choice. Our reliable team is led by an experienced excavation contractor with over 30 years of experience, and every job is owner-supervised for complete quality assurance. With our fleet of well-maintained skid steers, backhoes, dump trucks, and excavators, we can handle almost any size job, from grading for new driveways to building site preparation throughout Middleton, Caldwell, and Nampa.

Call Today to Schedule an On-Site Estimate and Personalized Quote for Septic System Installations, Excavation Services, and Drainage Solutions in Canyon County

Give us a call today to learn more! We offer convenient on-site estimates, accurate advice, and competitive bids for Caldwell, Nampa, and Middleton. We always stand behind the quality of our work, and are fully licensed, bonded, and insured.

A3 Underground Construction Nampa, Caldwell, Middleton - 83651, 83652, 83653, 83686, 83687, 83605, 83606, 83607, 83644 California (CA)
Area code (208)
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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 Ada County, including but not limited to:

  • Bowmont, ID
  • Caldwell, ID
  • Huston, ID
  • Nampa, ID
  • Greenleaf, ID
  • Melba, ID
  • Middleton, ID
  • Notus, ID
  • Parma, ID
  • Riverside, ID
  • Roswell, ID
  • Star, ID
  • Sunnyslope, ID
  • Wilder, ID
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