A3 Underground Construction is a fully licensed, highly experienced excavation contractor that specializes in septic system pumping, installation, and repair, underground utility trenching, drainage solutions, 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, A3 Underground Construction is 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.