COLUMBIA, S.C. (WIS) – South Carolina’s infrastructure earned a C-minus in the latest statewide report card from the American Society of Civil Engineers, marking an improvement from the D-plus the state received in 2021 but highlighting significant challenges tied to aging infrastructure, population growth and long-term funding needs.
Civil engineers evaluated eight major infrastructure categories, including roads, bridges, drinking water systems, dams and transit, using factors such as condition, capacity, funding, public safety, resilience and future needs.
The state’s highest grade went to ports, which received a B-plus, aided by major investments including the completion of the Charleston Harbor deepening project, making it the deepest harbor on the East Coast at 52 feet. Aviation and bridges earned a C-minus; dams, roads, and transit earned a D-plus while drinking water and wastewater each received a D.
Engineers credited recent state and federal investments for the overall improvement. The report noted that highway funding programs have grown significantly in recent years and highlighted investments from the federal Infrastructure Investment and Jobs Act, which provided funding for roads, bridges, drinking water systems and other infrastructure projects throughout the state.
Despite those gains, infrastructure leaders say major needs remain.
“Despite the progress, there’s a long way to go,” said Jonathan Ard, co-chair of the 2026 report card effort. Ard noted that 43% of South Carolina’s major roads remain in poor condition, citing previous decades of underinvestment and deterioration.
The report estimates South Carolina faces a $20 billion road funding shortfall over the next 20 years. Engineers say that without sustained investment, much of the state’s road network could continue to deteriorate despite recent improvements.
Road safety remains another concern. While traffic fatalities declined from 1,198 in 2021 to 1,041 in 2024, South Carolina continues to rank among the states with the highest roadway fatality rates in the nation.
State lawmakers pointed to recent reforms as reasons for optimism.
Sen. Josh Kimbrell, R-Spartanburg, said he believes the recently enacted SCDOT Modernization Act will help accelerate road projects and improve efficiency. However, Kimbrell argued the state’s biggest obstacle isn’t funding.
“The issue we have in South Carolina is not a money problem, it’s a contractor problem,” Kimbrell said, citing competition with neighboring states for qualified construction firms.
Beyond transportation, engineers identified mounting concerns with the state’s drinking water and wastewater systems. The report estimates South Carolina faces approximately $8 billion in drinking water infrastructure needs over the next 20 years, with much of the need tied to aging distribution pipelines. Drinking water violations also increased significantly, rising to 317 violations in 2024, up from 186 the previous year.
Wastewater systems face similar pressures. Engineers reported sanitary sewer overflows increased by 346% since 2022, driven in part by aging systems, population growth and increasingly severe weather events.
The report also sounded alarms about the state’s aging bridges and dams. South Carolina has nearly 3,000 bridges more than 60 years old, while only 34.5% of bridges are considered in good condition, below the national average of 44%. The state also has more than 2,400 dams, with an average age of 68 years.
Population growth is expected to intensify those challenges. South Carolina’s population currently stands at about 5.6 million people and is projected to exceed 6.2 million by 2035, increasing demands on roads, water systems, utilities and public transit.
Gwenn Sollenberger, president of the American Society of Civil Engineers, said infrastructure investments are crucial to the state’s future.
“These systems drive economic growth, create jobs, improve public health and protect us from environmental threats,” Sollenberger said.
While South Carolina’s overall grade improved, it still trails the national infrastructure average of C. Engineers called the state’s C-minus “progress, but a floor, not a ceiling,” arguing that continued investment and long-term planning will determine whether South Carolina can continue improving its infrastructure in the years ahead.
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