Since 1950, the Heavy Constructors Association of the Greater Kansas City Area has been the advocate for public works in both Kansas and Missouri. The HCA remains committed to delivering needed improvements to Kansas City’s highways, roads, bridges, airports, rivers, sanitary water and storm water systems. Our quality of life as we know it depends on these facilities which we use each and every day. WE BUILD THE BIG STUFF! The Heavy Constructors Association of Greater Kansas City is a highway-heavy utility chapter of the Associated General Contractors of America (AGC) and the American Road and Transportation Builders Association (ARTBA).