All oversize loads entering Harlem, Blaine County, must conform to the regulations outlined by the Montana Department of Transportation (MDT).

In general, any vehicle exceeding 12 feet in width, 14 feet 6 inches in height, and within Class 3 overweight classification (over 80,000 lbs) should secure a special permit from the Harlem Public Works Department.

Harlem, with its proximity to the Milk River and agricultural activities, demands extra care in oversize load planning. Loads must be properly flagged and marked according to state and local guidelines.

For oversize loads exceeding 18 feet in width or 120 feet in overall length, escort vehicles are mandatory, particularly on narrow rural roads around Harlem.

Police escorts may be necessary for oversize loads traveling through downtown Harlem or near critical intersections. Arrangements for police escorts can be made by calling the Blaine County Sheriff's Office at least 72 hours in advance.

To obtain a special permit, applicants can visit the Harlem Public Works Department's website or contact the permit office directly at (406) 353-2441.

Applicants are advised to include detailed route information, load specifications, and any additional information that might be pertinent to the safe passage of the oversize load through Blaine County.

Oversize loads are restricted from traveling during peak hours (7 am - 9 am and 4 pm - 6 pm, Monday through Friday) on local highways and city roads to minimize congestion.

During periods of extreme weather (such as heavy snow or high water events), oversize load permits may be temporarily revoked or additional restrictions applied.

The base permit fee for an oversize load in Blaine County is $50. Extra fees may be levied based on the complexity of the route, escort requirements, and other considerations as determined by the Harlem Public Works Department.

For oversize loads requiring a police escort, an escort fee of $150 per hour per officer is charged, with a 2-hour minimum.