We Emphasize Quality, Not Just Industry Standards


About Us

Active Underground was established in 2005 as a Septic Excavation Business. We are located in Mason County and have over 15 years of experience.

We specialize in commercial and residential sites from Septic to Excavation in the Shelton, WA and surrounding areas in Mason County.

Active Underground makes it a priority to have the knowledge and experience of knowing what the customer wants with the most efficient way of getting the job done, at a fair price. What sets us apart from our competition is our attention to detail; getting the job right and on time; and our customer’s satisfaction.