South Carolina's building programme is led by power and pavement: the $5 billion Canadys Station gas plant in Colleton County, approved in June 2026, sits ahead of two interstate widenings that have each grown by a billion dollars or more — I-26 between Charleston and Columbia, now $3.03 billion, and Columbia's Carolina Crossroads at $2.751 billion — plus a $2.27 billion widening of I-95 from the Georgia line. Charleston concentrates the rest, with MUSC's $1.115 billion cancer hospital in design, the Navy Base Intermodal Facility, and a $453 million pair of Charleston airport projects, while the $2.35 billion Mark Clark Expressway extension sits suspended after the state infrastructure bank voted to abandon it.
*How to read the total: the sum of the published figures in the list below. Bases differ by project — most are total cost estimates, some are federal grants, program totals, or construction contracts as awarded. Each project's expanded view labels its own basis. We add them up with the labels showing rather than pretend they're all the same kind of number.
Hover a pin for the project snapshot. Pin numbers match the project list below. Locations are approximate (nearest city or corridor midpoint) on a schematic state outline.
Click any project to expand its full record — description, owner, dates, funding, the law behind it, and its source. Filter by who owns it and where it stands, or sort by cost.
16 projects over the $10M floor with a public owner: 1 energy plant, 7 highway/interchange projects (1 suspended), 1 rail/port intermodal facility, 3 airport projects, and 4 public university / academic health buildings. Ordered by published cost, descending.
Known gaps: No qualifying Joint Base Charleston or Shaw AFB military construction project over $10M with a firm published cost was found — the Joint Base Charleston Aeromedical Evacuation Squadron facility was only published as a $25M–$100M solicitation range, so it is excluded rather than estimated. No Santee Cooper or municipal water/wastewater capital project over $10M with a published total was verified in this pass. GSP's terminal expansion and Columbia Metropolitan Airport work are in planning with no construction cost published.
Deliberately excluded: I-85 widening in Spartanburg/Cherokee ($830M — substantially complete 2024); the I-26 Midlands Connection ($421M — completed June 2025); Charleston Harbor Deepening to 52 ft ($580M — completed 2022); Hugh K. Leatherman Terminal Phase One ($1B — opened 2021; later phases have no separately funded published cost); Inland Port Greer expansion ($55M — completed March 2025); I-526 Lowcountry Corridor WEST as a standalone (no funded published total verified — press figures range $1.1B–$7B; its funded piece, Long Point Road, is listed); I-73 and the I-85 Anderson/Oconee and I-77 York/Chester widenings (unfunded proposals). Completed projects are excluded by the same rule as every state in this tally: this page counts what is being built, not what was.
News-flagged figures: 11 of the 16 rows rest on news reporting of official figures rather than a citable owner page — the Canadys approval (Utility Dive, reporting the PSC order), the three SCDOT corridor totals (the Governor's office / Secretary Powell cost update), the MUSC cancer hospital, UofSC's medical school, Clemson's veterinary complex, Main Road Segment A and the Airport Connector Road. They are flagged in the underlying data, and the figures are the officials' own as reported. The Navy Base Intermodal Facility's cost is genuinely unsettled ($545M Ports Authority budget vs $690M–$782M in later testimony and trade press); the committed-funding figure is used, with the conflict in the project's notes.
Threshold discipline: the floor stayed $10M. The smallest entry ($12.19M, GSP apron work) clears it on the airport commission's own package; GSP's larger terminal expansion is still in a $4M planning phase with no construction cost published, so it is not listed — volume was reported, not padded.