Tacoma, WA Construction Gravity Sewers Gravity Sewers provides Tacoma, WA with underground utility and infrastructure construction services via tunnel construction services, horizontal auger boring and (HDD) horizontal directional drilling more commonly called directional boring. We provide underground utility construction services specializing in the underground boring of utility pipelines for satellite, cable, TV, Internet, wi-fi, fiber … Continue reading Tacoma, Washington Gravity Sewers