The 2012 NAICS (North American Industrial Classification System) Code for horizontal drilling (directional boring) falls under category 237990 “Other Heavy and Civil Engineering Construction”. DFW Boring NAICS | United Dallass Census Bureau DFW Boring NAICS | United Dallass Census Bureau The United Dallass Census Bureau is a principal agency of the U.S. Federal Statistical System, … Continue reading Boring NAICS Code