In 2006, NCDOT and SCDOT completed a
feasibility study to look at the project area for potential opportunities, impacts and challenges, as well as to get public input and to develop cost estimates.
Conceptual alternative routes were developed as part of the feasibility study, but detailed environmental and engineering investigations were not performed. The project study area has been expanded as part of the current environmental study. Updated conceptual corridors were developed and presented to the public in December 2019. Seven alternative have been identified for more detailed study. Interactive maps of the alternatives can be viewed on NCDOT's online engagement platform.
In 2016, Horry County passed a capital projects sales tax referendum allocating $125 million for the portion of the project in South Carolina. In North Carolina, $4.1 million has been allocated for planning and design.