The Longest Great Lakes Freighter Ever Built

A ship longer than three football fields laid end to end sails the Great Lakes, and yet it can never, ever reach the ocean. This is the Paul R. Tregurtha, the longest freighter ever built for the Great Lakes and the undisputed "Queen of the Lakes." At over 1,000 feet, she is a genuine giant of American shipping, and one with a few surprising quirks. Here is her story.

The Answer: The Paul R. Tregurtha

The longest Great Lakes freighter ever built is the M/V Paul R. Tregurtha, which measures a colossal 1,013.5 feet from bow to stern. Launched in 1981 from the American Ship Building Company yard in Lorain, Ohio, she is a self-unloading bulk carrier that spends her days hauling iron ore and coal around the lakes. Affectionately nicknamed "Big Paul," she has been the single longest vessel on the Great Lakes since the day she entered service, and no ship built before or since has ever topped her.

Longer Than Three Football Fields

The numbers are hard to fathom. At 1,013.5 feet long and 105 feet wide, the Tregurtha stretches longer than three American football fields placed end to end. She can swallow up to 68,000 tons of taconite iron-ore pellets, or around 64,000 tons of coal, in a single load, then empty her five massive cargo holds in about eight hours using a 260-foot unloading boom. A single modern 1,000-footer like this one can carry as much cargo in one trip as six of the older, mid-century freighters combined. Little wonder these ships are the backbone of the region's iron and steel supply chain, running out of ports like Duluth.

Why They Can't Build Them Any Bigger

There is a very specific reason the biggest lakers top out right around 1,000 feet: a single lock. To get between Lake Superior and the lower lakes, ships must pass through the Soo Locks at Sault Ste. Marie, and only one of them, the Poe Lock, is big enough to handle the giants. Measuring 1,200 feet long and 110 feet wide, the Poe Lock is the hard ceiling on ship size, and the entire class of 1,000-footers was designed specifically to squeeze through it with just feet to spare. Build a ship any bigger, and it simply could not get where it needs to go.

The Giant That Can Never Reach the Ocean

Here is the truly remarkable part. The Tregurtha and her twelve fellow 1,000-footers are far too large to fit through the smaller locks of the St. Lawrence Seaway and the Welland Canal, which top out around 730 feet. That means these enormous ships are physically trapped on the upper Great Lakes, sailing the same inland freshwater seas like Lake Superior for their entire working lives, and never once touching saltwater or the open ocean. There is at least one nice upside to that confinement: because she is never exposed to corrosive seawater, the Tregurtha remains in excellent shape well into her forties.

The Queen of the Lakes

"Queen of the Lakes" is an unofficial but cherished title, awarded to whichever ship is the longest one currently sailing the Great Lakes, and it has been passed down through the generations as freighters grew ever larger. Back in 1905, a 576-foot steamer wore the crown. The Tregurtha, originally launched under the fancier name William J. De Lancey, was the very last of the thirteen "thousand-footers" ever constructed, and astonishingly, no new Great Lakes freighter was built for nearly four decades after her. She has now held the title of Queen of the Lakes longer than any vessel in the history of the lakes, a reign that shows no sign of ending.