All oversize loads entering the City of Williston, Barnwell County, must conform to the requirements set by the South Carolina Department of Transportation.

In general, any vehicle over 12 feet in width, 14 feet in height, and within the Class 3 weight category (over 120,000 lbs) should obtain an oversize load permit from the Williston Public Works Department.

The Williston Public Works Department works closely with the Barnwell County Sheriff's Office to ensure that oversize loads are routed through the city safely and efficiently, minimizing disruptions to local traffic and infrastructure.

Escort vehicles are required for oversize loads exceeding 16 feet in width or 18 feet in height in Williston. The escort vehicle must be equipped with appropriate warning lights and flags.

For loads exceeding 20 feet in width or 25 feet in height, a police escort is mandatory. The Williston Police Department provides escort services, and arrangements must be made at least 48 hours in advance. The fee for police escort services is $150 per hour, with a minimum of 2 hours.

To apply for an oversize load permit in Williston, applicants must submit their request through the South Carolina Department of Transportation's online permit portal or by contacting the Williston Public Works Department directly at (803) 458-5221.

Applicants must provide detailed information about the load, including its dimensions, weight, and proposed route through Williston. Documentation requirements include proof of insurance and a detailed route survey.

Oversize loads are restricted from traveling through Williston during peak traffic hours (7-9 am and 4-6 pm, Monday-Friday).

During periods of heavy rain or flooding, oversize loads may be restricted from traveling on certain routes as determined by the Williston Public Works Department.

Residential neighborhoods and historic districts within Williston have restricted routes for oversize loads. Permits will be issued with specific route instructions to avoid these areas.

The base permit fee for oversize loads in Williston is $100. Additional fees apply based on the size and weight of the load, as well as the complexity of the route.

For loads requiring a police escort, an additional fee of $150 per hour is charged, with a minimum of 2 hours. Complex routes that require additional review or infrastructure protection may incur additional fees ranging from $200 to $500.