I-85 Reconstruction & Widening Design-Build

Spartanburg & Cherokee Counties, SC

Parrish & Partners is serving as the lead design engineering firm for this design-build project, which consists of the reconstruction and widening of approximately 21 miles of I-85 in Spartanburg and Cherokee Counties. The project will reconstruct the existing asphalt pavement to Portland Cement Concrete, increase capacity, and upgrade interchanges and overpass bridges to meet state and federal design requirements. SCDOT intends to reconstruct the existing six-lane mainline and auxiliary lanes from MM 76.4 to MM 80, then widen I-85 from four to six lanes beginning at MM 80 in Spartanburg County and ending at the Broad River Bridge.


  • Project Management
  • Roadway Design
  • Structure Design
  • Hydraulic Design
  • Environmental Permitting
  • Railroad Coordination
  • Public / Media Relations
  • Design Quality Control
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At a Glance

Client SCDOT

Dates of Service 2016 - 2021

  • 21 miles of interstate
  • 4 interchange reconstructions
  • 8 total bridges being constructed
  • $435 million total project cost
  • D-B Team - Blythe/Zachry JV

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