Crowley moves Doyon Rig 25: spotlight on the North Slope.

• Position: Oil & Gas

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Crowley's high-deck-strength series deck barges, 455-8 and 455-7, delivered a Doyon drill rig to Prudhoe Bay in August 2010 to support BP's North Slope drilling operations.

The rig, which is capable of working efficiently in extreme Arctic conditions, was originally loaded on the sister barges in the Columbia River in Vancouver, Wash., then towed to the site by tugs Gladiator and Guardsman.

Barge 455-7 carried eight pieces of the drilling complex, consisting of 32 rig mats and totaling more than 4.3 million pounds, while barge 455-8 carried four...