HZ United, LLC is a Civil Engineering Consulting firm providing services to government and private clients. As a company, HZU has been designing elements of major transit development and environmental engineering projects throughout the country. From Missouri I-64 Gateway Reconstruction (a 14 mile freeway in downtown St. Louis), to TH 212 preliminary and final design (a $240 million 12 mile new freeway in Chaska, MN) and Central Corridor Light Rail Construction (a projected $1 billion 12 miles of light rail connecting St. Paul and Minneapolis), HZU has been in the front of the design challenges.