David Barnard Steinman (June 11, 1886 – August 21, 1960) was an American civil engineer. He was the designer of the Mackinac Bridge and many other notable bridges, and a published author. He grew up in New York City's lower Manhattan, and lived with the ambition of making his mark on the Brooklyn Bridge that he lived under. In 1906 he earned a bachelor's degree from City College and in 1909, a Master of Arts from Columbia University and a Doctorate in 1911. He also received an honorary Doctor of Science in Engineering on 15 April 1952 from degree mill Sequoia University, but would distance himself from it soon after a 1957 inquiry raised doubts over its legitimacy, and did not mention the qualifications in his biographies. He was awarded the Franklin Institute's Louis E. Levy Medal in 1957. David B. Steinman built bridges in the United States, Thailand, England, Portugal, Italy, Brazil, Haiti, Puerto Rico, Canada, Korea, Iraq and Pakistan. He had a literary bent, and was a published author with several books, articles in advancement of his craft, and even had children's books and poetry to his credit. Early life Steinman was the child of Jewish immigrants. Little is known of his family and early childhood other than that he had 6 siblings. There is some controversy about where and when he was born. Some sources have him born in Chomsk (Хомск חומסק), Brest, Belarus in 1886, and emigrating to the United States with his family in 1890. However other sources, including Ratigan, and Steinman himself have him born in New York in 1887. Steinman grew up in New York City, New York, and was raised in the shadows of the Brooklyn Bridge. The Williamsburg Bridge was constructed as he grew up. The late Nineteenth and early Twentieth centuries were a time of significant bridge construction in the area, and he later said this is where he got his first interest in bridges. Because his family had little money, he worked to put himself through both the City College of New York, graduating summa cum laude in 1906 and then Columbia University, where he completed three additional degrees culminating in a PhD in Civil Engineering. His PhD thesis was on a steel truss arch design for the Henry Hudson Bridge. While he was attending Columbia he did fellowships as well as taught nighttime classes at the City College