The Blennerhassett Bridge is the final project in a decades-long effort to complete the four-lane Appalachian Corridor D from I-79 at Clarksburg into Ohio. HCN, a Terracon company, completed three geotechnical phases for the originally planned suspension bridge alternate. During the first phase, a preliminary geotechnical investigation was performed initially by drilling 21 test borings in November of 1999. A second geotechnical study was performed by drilling 34 borings in December of 2000. The second and third phases provided recommendations for the foundation alternatives at the towers, cable bents, and anchorage of the suspension bridge alternate. The West Virginia Division of Highways opted for a tied-arch design after evaluating four concepts for the bridge; comparing factors such as cost construction and environmental issues. The final geotechnical phase performed by HCN established recommendations for the Short Span Tied Arch Alternate. During the construction phase of the project, HCN was also contracted to provide materials consulting, laboratory testing, and construction inspection services.