A3 Underground Construction

A3 Underground Construction is a fully licensed, highly experienced excavation contractor and septic system installer. We specialize in standard and complex septic system installation and repairs, underground utility trenching, drainage solutions, and grading, excavation, and demolition services. We have more than 30 years of industry experience and a reputation for superior workmanship, excellent customer service, and competitive prices. With our diverse range of services, large fleet of excavating equipment, and highly skilled team, we’re able to meet the needs of residential, agricultural, commercial, and industrial clients throughout Boise, Nampa, Emmett, Meridian, Caldwell, Middleton, Weiser, McCall, Eagle, New Plymouth, and surrounding areas. Call today to schedule an on-site consultation. Whether you need joint trenching for stacking utilities, a large soil absorption system installed, or demolition and lot clearing services,  you can count on us to get the job done quickly, affordably, and to the highest of standards.