Columbia’s Williams Street Extension is scheduled to begin construction in spring 2026
The City of Columbia has scheduled construction of the Williams Street Extension for spring 2026, advancing a planned roadway connection the city describes as critical infrastructure for access to its riverfront park.
The project has an estimated cost of $20.6 million. South Carolina is providing $16 million, while $4.6 million is coming from Richland County’s Transportation Penny program, according to the city’s project information.
The extension is listed by Columbia among its active special-project and infrastructure initiatives. The city identifies it as a riverfront-access project intended to connect the area around the waterfront park and surrounding development areas.
Construction is scheduled, not reported complete
The city’s published timetable calls for construction to begin in spring 2026. The available project information does not provide a final completion date.
That distinction is significant for people planning to use the riverfront area or tracking access improvements: the city has identified a construction start schedule, but the source does not establish that the roadway is open, substantially complete or operating.
The source also does not identify road closures, detours, construction-stage traffic changes, or a more detailed sequence for design, bidding, contract award and construction. Those details were not included in the city material provided for this report.
Riverfront access and future development
Columbia says the project is intended to improve riverfront gateways, mobility, safe streets and access to future mixed-use development. The stated purpose includes supporting access to the city’s planned waterfront park.
Those are project goals rather than completed outcomes. The city’s information does not quantify how many homes, jobs, visitors or other users the extension may serve once built.
The city lists Guignard Associates and Hussey, Gay, Bell and DeYoung among the contractor and project partners associated with the extension. The City of Columbia is the public agency presenting the project and its funding plan.
What is known next
Spring 2026 is the next stated project milestone. A final completion deadline has not been published in the available city source, and no later construction-status update is included in the approved material.
For Columbia residents and riverfront-area users, the project is a funded access initiative still identified by the city as moving toward construction, rather than a finished transportation connection.
Sources
- Williams Street Extension – Special Projects, City of Columbia, South Carolina
- Special Projects & Infrastructure, City of Columbia, South Carolina