Parsons Secures Lead Design Role For $227 Million SC Interchange Project
Parsons Corporation was selected by SCDOT to lead design services for the $227 million Interstate 526 Long Point Road Interchange Improvements project. Working with Ames Construction, Parsons will address safety and congestion issues in Charleston's Mount Pleasant area, with its design award valued at approximately 10 percent of the total project cost.

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Parsons Corporation has been selected by the South Carolina Department of Transportation (SCDOT) to provide lead design services for the Interstate 526 Long Point Road Interchange Improvements project. Announced on Aug. 03, 2026, the award positions Parsons as the lead designer within the Ames Construction design-build team. The move expands Parsons' portfolio of complex transportation infrastructure projects delivered through collaborative design-build partnerships, targeting critical upgrades in the Charleston region.
The total design-build project is valued at approximately $227 million. Parsons’ specific award for design services represents approximately 10 percent of this total value. The project aims to modernize one of the Charleston region's busiest transportation corridors, specifically addressing infrastructure needs in the growing Mount Pleasant area.
Project Scope and Impact
The Interstate 526 Long Point Road Interchange Improvements project focuses on three primary objectives: improving safety, reducing congestion, and strengthening freight mobility. These enhancements are designed to benefit residents, businesses, and freight traffic navigating the corridor.
| Metric | Value |
|---|---|
| Total Project Value | Approximately $227 million |
| Parsons Design Award | Approximately 10 percent of total |
| Lead Designer | Parsons Corporation |
| Construction Partner | Ames Construction |
By modernizing this key artery, the project addresses capacity constraints in a high-growth demographic zone. The collaborative design-build approach allows for integrated planning between Parsons and Ames Construction, aiming to streamline delivery and minimize disruption during construction phases.
Strategic Portfolio Expansion
This selection reinforces Parsons' position in the transportation infrastructure sector. The company highlighted that the award expands its portfolio of complex projects delivered through collaborative design-build partnerships. Such partnerships are increasingly favored by public agencies like SCDOT for their ability to manage risk and accelerate timelines compared to traditional design-bid-build methods.
What the Numbers Show
The allocation of approximately 10 percent of the total project value to design services indicates a significant emphasis on engineering complexity. In typical highway projects, design fees often range lower; a higher percentage suggests intricate geometric solutions or environmental mitigation requirements inherent to the Mount Pleasant area's dense development patterns.
How might the success of this design-build partnership influence SCDOT's procurement strategies for future infrastructure projects in South Carolina?
What specific environmental or logistical challenges in the Mount Pleasant area are driving the higher-than-average 10% allocation for design services?
Could Parsons' expanded role in complex transportation design lead to increased revenue concentration in the infrastructure sector, and how does this diversify their risk profile?

































