A barge is a flat-bottomed boat, built mainly for river and canal transport of heavy goods. Most barges are not self-propelled and need to be moved by tugboats towing or towboats pushing them. Barges on canals (towed by draft animals on an adjacent towpath) contended with the railway in the early industrial revolution but were outcompeted in the carriage of high value items due to the higher speed, falling costs, and route flexibility of rail transport. Barges are still used today for low value bulk items, as the cost of hauling goods by barge is very low. Barges are also used for very heavy or bulky items; a typical barge measures 195 feet by 35 feet, and can carry up to 1500 tons of cargo.

Self propelled barges may be used as such when traveling downstream or upstream in placid waters and operated as an unpowered barge with the assistance of a tugboat when traveling upstream in faster waters.

Poles are used on barges to fend off the barge as it nears other vessels or a wharf, often called pike poles, and on shallow canals for example in the UK long punt poles are used to manoeuvre or propel the barge. These long poles have given rise to the saying, "I wouldn't touch that (subject/thing) with a barge pole." The meaning is that something is so unseemly or contentious that the person wants to avoid it or being associated with it at all costs. A common variation is to say, "I wouldn't touch that with a (insert length) barge pole." Typically the length for small avoidance is "ten foot": The greater the length, the more the sayer feels it is to be avoided, but the expression "I wouldn't touch it with a ten foot pole" is by now the most common one by far.[citation needed]

Etymology
Barge is attested from 1300, from Old French barge, from Vulgar Latin barga. The word originally could refer to any small boat, the modern meaning arose around 1480. Bark "small ship" is attested from 1420, from Old French barque, from Vulgar Latin barca (400 AD). The more precise meaning "three-masted ship" arose in the 17th century, and often takes the French spelling for disambiguation.

Both are probably derived from a Latin *barica, from Greek baris "Egyptian boat", ultimately from m Coptic bari "small boat."