St. Louis County Spring Load Restrictions Begin March 18 in Southwest Zone

Spring load restrictions will take effect at 12:01 a.m. Wednesday, March 18, on county roads in the North-Central Zone of Minnesota, which covers the far southwest corner of St. Louis County south of U.S. Highway 2 and west of State Highway 33.

St. Louis County Public Works issued the announcement March 12, six days ahead of the restrictions taking hold. The timing follows the annual pattern of the frost melt season, when roadbeds saturate with water and lose their ability to bear normal truck weights. The county has noted that freeze-thaw cycles combined with heavy vehicles accelerate pothole formation in pavement, making the restrictions a structural protection measure rather than a procedural formality.

State law sets maximum axle weights during restriction periods, and county roads across the affected zone will be posted with weight restriction signs. St. Louis County maintains maps identifying the specific weight limits on individual county roads, which the county posts online as the season progresses. In limited cases where certain roads need additional recovery time beyond the standard window, the county may extend restrictions; posted signs will indicate which roads remain under those extended limits.

Exemptions exist, but they are narrow. The county grants them only for situations involving human health and safety, with utility restoration and well repair cited as typical qualifying cases. Haulers or contractors who believe their work meets that threshold should call the Traffic Engineer at 218-625-3791. Tanja Mattonen, the county's Assistant Traffic Engineer, is the listed media contact and can also be reached at mattonent@stlouiscountymn.gov.

For those operating across multiple freight zones, the timeline after restrictions lift matters as much as the start date. Once spring load restrictions are removed, middle-range overweight permits become available immediately; full-summer overweight permits follow two to three weeks later. MnDOT reports local start and end dates at 651-366-5400. Questions about legal axle weights during restrictions go to 651-350-2000, while oversize and overweight permitting inquiries can be directed to 651-296-6000 or ofcvopermits.dot@state.mn.us. Current road condition updates are available by dialing 511 or through 511mn.org.

Zone boundaries for the broader county are defined by the same two corridors. The North Zone, which covers the majority of St. Louis County north of U.S. Highway 2 and east of State Highway 33, operates on a separate restriction calendar coordinated through MnDOT's statewide frost-zone framework.