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.

Demolition of existing barn and pad prep for new shop.

Construction of new driveway in south salem.


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.



Dig out  in Turner Or

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". 


​​Installation of approx 161 ft trench drain 

at Pacific NW Marble and Granite.