The Kansas City Chiefs proposed $3 billion enclosed stadium in Kansas City, Kan., is still several years away from opening, but the project already is shaping up to become one of the largest and most closely watched heavy construction efforts in North America. MANICA has developed several high-profile sports venues, including Allegiant Stadium in Las Vegas and the new Nissan Stadium currently under construction in Nashville. Team officials have not announced a general contractor or construction manager, nor have they released construction phasing, equipment requirements or workforce estimates.