All oversize loads entering the City of Letcher, which is located in Yankton County, must conform to the requirements set by the South Dakota Department of Transportation.

In general, any vehicle over 12 feet in width, 14 feet 6 inches in height, and within the Class 3 weight category (over 80,000 lbs) should obtain an oversize load permit from the Letcher Public Works Department.

The City of Letcher has specific ordinances that require permits for oversize loads to ensure safe passage through the city streets and to minimize disruptions to local traffic and construction activities.

In Letcher, escort vehicles are required for oversize loads exceeding 16 feet in width or 18 feet in height. Escort vehicles must be equipped with appropriate warning lights and flags as per South Dakota regulations.

For loads exceeding 20 feet in width or over 100 feet in length, a pilot car escort is mandatory. The escort vehicle must be positioned ahead of the oversize load to warn oncoming traffic. Local police escort may be required for particularly complex movements, and arrangements must be made in advance through the Letcher Police Department.

To apply for an oversize load permit in Letcher, applicants must submit their application through the South Dakota Department of Transportation's online portal or by contacting the Letcher Public Works Department directly.

Applicants are required to provide detailed information about the load, including its dimensions, weight, and proposed route through Letcher. Documentation, such as proof of insurance and a valid USDOT number, is also required.

Oversize loads are restricted from traveling during peak hours (7-9 am and 4-6 pm) on weekdays in Letcher.

During the spring thaw season (typically March to May), additional weight restrictions may be imposed on certain city roads. It is the responsibility of the permit holder to check with the Letcher Public Works Department for the latest information on road conditions and restrictions.

Certain city streets, such as those with low-hanging utility wires or narrow bridges, may be restricted to oversize loads. The proposed route must be reviewed and approved by the Letcher Public Works Department prior to permit issuance.

The standard permit fee for oversize loads in Letcher is $50, plus an additional $0.10 per mile for route mileage within the city limits.

For loads requiring a police escort, an additional fee of $100 per hour will be charged, with a minimum of 2 hours.