Demolition of existing barn and pad prep for new shop.

Harmony Road Commercial Development, Milwaukie, Oregon

We are a service company that provides our customers cost effective excavation services with, safety and attention to detail before we even start.  Our experience has shown us that this will breed a natural, positive environment of quality and communication, focusing on schedule and budget at all times. We will create solutions for our customers' everyday challenges. We are dedicated to our customers with their utmost needs and wants in mind.

Regis Street Improvment - City of Stayton

American Underground is committed to long-term customer satisfaction. To achieve this goal, we are continuously working harder and smarter with more dedication and resolve each and every day, without ever compromising our integrity, and always making sure safety is our number one goal each and every day.



Gary King and Sean Connaghan, Partnered in 2015 to start their own civil underground company. Both accomplished in their trade with a combined 20 plus years of experience. From road building , commercial site prep, to industrial underground projects. ''No Job is too big, or too small". 

Skyline Blvd. Portland, Oregon

Dig out  in Turner Or

Construction of new driveway in south salem.

Red Leaf Multi-Housing Development