Terracon's Bettendorf office first opened in Davenport, Iowa, in 1967, with one employee. The Rock Island office was established in 1989 as the first Terracon office east of the Mississippi River providing environmental services. In 2001, the Davenport and Rock Island offices consolidated and opened the Bettendorf office. Today, the Bettendorf office has 19 full-time employees and three part-time employees, and currently maintains one drill rig. The services they offer include construction materials engineering and testing, geotechnical engineering such as foundation testing and seismic risk assessment, and environmental services like asbestos management and soil sampling.