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The original unit (first occupied in 1924) of the Iowa Highway Commission complex on the south side of of Lincoln Way. In 1904 Iowa's 30th General Assembly designated Iowa State College to act as a highway commission for the state. Iowa State's engineering dean Anson Marston and agriculture dean Charles F. Curtiss became the first commissioners. Thomas H. MacDonald, a 1904 ISC engineering graduate, was named assistant engineer in charge of field operations. He quickly became the first chief engineer of the new commission. (Photo is courtesy of the Iowa Department of Transportation.)