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