Projects & Case Studies

Construction Engineering & Inspection

NCDOT, I-85/I-485 Interstate Widening and New Construction

Charlotte, NC

Services Utilized

Construction Engineering and Inspection
Construction Management

Project Summary

NCDOT, I-85/I-485 Interstate Widening and New Construction

Charlotte, NC

SEPI oversaw construction of a new eight-lane section of I-485 from west of NC 115 (Old Statesville Road) to east of I-85 for the Charlotte Western Outer Loop in Charlotte, NC. This 5.7-mile section links I-77 to I-85, relieving congestion on neighboring surface streets and completes the entire 67-mile I-485 Outer Loop, an important corridor for local and regional travel, which includes the completion of the I-485/NC 115 Interchange. A split diamond interchange was constructed at Prosperity Church Road, which allows traffic to exit I-485 onto a one-way service road connected to three separate streets through a series of roundabouts. The construction of a diverging diamond interchange at Mallard Creek Road was also needed.

SEPI provided CEI services including QA/QC oversight, construction materials testing, project documentation control, contract administration, project claims avoidance, and project closeout, in addition to performing inspection services on construction of Portland cement concrete pavement, MSE walls, culverts, noise walls, drilled piers, monitored permitted sites, sedimentation and erosion control devices, and utility relocation.

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