Washington D.C. Underground Utility Construction Underground Utility Construction Washington D.C. Boring Contractors, LLC provides Washington DC with underground utility and infrastructure construction services via three methods of service: horizontal directional drilling (HDD) more commonly called directional boring, horizontal auger boring and hand-tunneling. We provide Washington DC commercial, residential and municipal owners and contractors with underground … Continue reading Washington D.C. Horizontal Directional Drilling (HDD) Boring Contractors