Carolina Bays Parkway, Horry County, South Carolina
CECS was selected by the South Carolina Department of Transportation to provide design services for the extension of the Carolina Bays Parkway from SC 544 to SC 707, a distance of 4.2 miles. The Carolina Bays Parkway is a six-lane divided highway with full control of access. The project is estimated to cost over $250 million and includes a 3,632’ long bridge over the Atlantic Intracoastal Waterway (AIWW), a new interchange at SC 707, and the relocation of a secondary road. As the prime consultant, CECS is responsible for project management, geometric design, roadway and interchange design, drainage design, environmental documentation, quality assurance, and subsurface utility engineering.
Early in the design development process, CECS identified over $20 million in cost savings by combining the original twin bridges over the AIWW into a single six-lane bridge, relocating a secondary road to shorten the AIWW bridge, relocating the interchange at SC 707 to reduce right of way cost, and proposing access roads to landlocked properties to reduce property costs.
A reevaluation of the approved Final Environmental Impact Statement (FEIS) was prepared to address several modifications in the design to include the movement of a terminus form US-17 to SC-707.
CECS provided SUE QL “B” services for over 70,000 linear feet of underground utility lines and approximately 43,000 linear feet of aerial lines. Project challenges included:
• Santee Cooper Electric Transmission main,
• Grand Strand Water & Sewer Authority Transmission
• Multiple fiber optic cables throughout route,
• Seven (7) different utility services in corridor.
The mapping generated will be utilized by the project team to coordinate utilities and their relocations for the new extension of SC 31 in Horry County.