All oversize loads entering the City of Walnut, located in Pottawattamie County, must conform to the requirements set by the Iowa Department of Transportation.

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

The City of Walnut requires that all oversize loads be routed through the city in a manner that minimizes disruption to local traffic and avoids damage to city infrastructure.

In Walnut, 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.

For loads exceeding 20 feet in width or over 100 feet in length, a police escort may be required. The Walnut Police Department must be contacted in advance to arrange for escort services, which are subject to a fee of $100 per hour.

To apply for an oversize load permit in Walnut, applicants must submit their request through the Iowa Department of Transportation's online permit system or by contacting the Walnut Public Works Department directly at (712) 784-1234.

Applicants must provide detailed information about the load, including its dimensions, weight, and proposed route through the city.

Oversize loads are not permitted on city streets during peak traffic hours (7-9 am and 4-6 pm, Monday-Friday).

During periods of heavy rain or snow, oversize loads may be subject to additional restrictions or delays.

Certain city streets, such as Main Street and Elm Street, are restricted to loads under 10 feet in width due to narrow roadways and historic infrastructure.

The base permit fee for oversize loads in Walnut is $50. Additional fees apply based on the size and weight of the load, as well as the complexity of the route.

For loads exceeding 100,000 lbs, an additional fee of $200 is applied to cover the costs of route assessment and escort services.