AUGUSTA, Mont. (AP) — Authorities are assessing the extent of damage to a historic bridge in western Montana after a truck exceeding the weight limit drove over it.

The Great Falls Tribune reports the 120-year-old Dearborn River High Bridge was closed last week after a 35-ton (32,000-kilogram) truck passed over it. The bridge has a weight limit of 7 tons.

Lewis and Clark County officials say the decking and railing were damage, and authorities were at the site on Monday to analyze other damages.

The bridge was built in 1897 and was restored for $1 million in 2003. It is one of the last surviving pin-connected Pratt half-deck truss bridges in the country.

The bridge is located about 20 miles (32 kilometers) south of Augusta.

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Information from: Great Falls Tribune, http://www.greatfallstribune.com