Tennessee Department of Transportation


Spring Hill, TN


Construction Engineering and Inspection, Utilities and Broadband

The Duplex Road widening project in Spring Hill, Tennessee, improves safety and traffic capacity and enhances the aesthetics and pedestrian use of this 3.2-mile collector road. This two-lane segment of Duplex Road from Main Street to just west of the I-65 overpass existed for many years as a rural thoroughfare with narrow lanes, no shoulders and steep hills with limited sight distance. Most neighborhood entrances connected directly to Duplex Road, and two schools were built on the east end of the road near I-65. With a significant increase in traffic volumes, the City of Spring Hill petitioned the Tennessee Department of Transportation for assistance to improve the existing roadway to three lanes with closed drainage, sidewalks, a multi-use path and signal improvements. Gresham Smith provided the construction engineering and inspection (CEI) services and coordination services to relocate utilities along the project limits.

Adding to the complexity of the roadway widening a busy suburban street, relocation of all overhead and underground utilities was required in conjunction with the roadway construction. Utility relocations included water, sewer and gas, along with overhead power, AT&T and Charter cable. The project includes the construction of six retaining walls, eight box culverts, one span bridge and a stream relocation. Gresham Smith services included utility coordination, submittal reviews, RFIs, weekly coordination meetings, public information meetings, project records and pay estimates produced with SiteManager software, full CEI testing, inspection and EPSC inspection services for the project.