Since its Foundation days, the tug's exhaust stack has been extended, to reduce fumes in the wheelhouse.
Waterworks Construction, as the name implies, specializes in building wharfs and has sent equipment to Newfoundland and Labrador before.
Incidentally the barge, although operated by NGC Nunatsiavut Marine Inc, is maintained by McKeil Marine and has been on the for sale list for some time. NGC is the business arm of the Nunatsiavut Government (the self-governed autonomous region of Labrador established by Inuit land claims). I believe the word "kaligak" refers to a specific type of sled in the Inuit language.