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A3 Underground Construction

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A3 Underground Construction is central and southwest Idaho’s best choice for high quality, cost-effective septic system installation and repair, underground drainage solutions, and trenching, grading, and excavating services. We have over 30 years of experience, extensive industry knowledge, and a fleet of well-maintained demolition and construction equipment. Not only are we are a fully licensed and insured excavation and septic system contractor, but we’re also one of the few state-certified complex septic system installers serving the Boise Metropolitan area. Call today to arrange an on-site consultation anywhere in or near Boise, Nampa, Meridian, Middleton, Caldwell, McCall, New Plymouth, and Midvale.

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(208) 630-3017
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