A3 Underground Construction

Call A3 Underground Construction for the best value in standard and complex septic system installation, replacement, and repair; aerobic and nitrogen reduction systems; septic tank locating; septic tank enzyme treatments; stone drain field design and installation; leach line additions; site evaluation and planning services; stormwater management; agricultural field piping; retaining ponds, concrete spillways and culverts; French drains and trench drains; grease traps and interceptors; sewer lines; utility trenching and digging; joint trenching; backhoe services; and excavating/grading. We serve customers throughout central and southwest Idaho, including Boise, Caldwell, Cambridge, Cascade, Council, Donnelly, Eagle, Emmett, McCall, Meridian, Middleton, Midvale, Nampa, New Meadows, New Plymouth, Ontario, and Weiser. We are a fully licensed and insured excavation contractor and state certified septic tank installer for both standard and complex systems. Our family owned business has more than 30 years of industry experience and a reputation for superior workmanship, excellent customer service, and competitive prices. All work is code compliant, and completed on time and on budget.

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