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Photos, video - King of the road: Big boiler makes its way to Duluth harbor

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A semi pulling a large industrial boiler (the silver object within the red frame) slowly works its way along Haines Road headed toward Piedmont Avenue on Thursday. Bob King / rking@duluthnews.com2 / 5
Workers use poles to elevate power lines and light signal poles at the intersection of Haines and Anderson roads, so the big, boiler-carrying rig can safely make it through safely. Bob King / rking@duluthnews.com3 / 5
The two flatbed trailers moving the boiler each had 18 tires per side. Bob King / rking@duluthnews.com4 / 5
The huge rig makes its way down Piedmont Avenue through the Piedmont Heights business district on Thursday. Bob King / rking@duluthnews.com5 / 5

A semi pulling a 442-ton industrial boiler made its way from Twig to the Duluth harbor on Thursday, the final leg of a slow journey that started in Nebraska.

Workers used tall poles to lift power lines out of the way along the route as the convoy started in Twig at midday, traveled down U.S. Highway 53 to Haines Road, then Piedmont Avenue, then 24th Avenue West -- eventually reaching Superior Street and wending its way to the waterfront via Garfield Avenue.

The boiler was headed to the Clure Public Marine Terminal, where it was to be loaded onto the ship Erik and transported to Sarnia, Ontario.

The entire unit, consisting of two tractors, two flatbed trailers and the boiler, extended 350 feet and weighed 885,000 pounds.