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