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Log drivers at Klarälven in Sweden. Log driving is a means of moving logs (sawn tree trunks) from a forest to sawmills and pulp mills downstream using the current of a river. It was the main transportation method of the early logging industry in Europe and North America. [1]
Timber rafting is a method of transporting felled tree trunks by tying them together to make rafts, which are then drifted or pulled downriver, or across a lake or other body of water. It is arguably, after log driving, the second cheapest means of transporting felled timber. Both methods may be referred to as timber floating.
Log jams form when trees floating in the water become entangled with other trees floating in the water or become snagged on rocks, large woody debris, or other objects anchored underwater. They can build up slowly over months or years, or they can happen instantaneously when large numbers of trees are swept into the water after natural disasters .
Log boom on St. Croix River in Maine, aerial photo taken in 1973 Timber marks on a log building in Sweden where they are called flottningsmärke. A log boom (sometimes called a log fence or log bag) is a barrier placed in a river, designed to collect and or contain floating logs timbered from nearby forests. The term is also used as a place ...
Log rolling, sometimes called birling, is a Sparring Sport involving two competitors, each on one end of a free-floating log in a body of water. The athletes battle to stay on the log by sprinting, kicking the log, and using a variety of techniques as they attempt to cause the opponent to fall off.
Log flumes are generally out in the open, though some may contain enclosed or tunneled sections. The flume is usually made of fiberglass, concrete or galvanized steel. In a typical course, the boatful of riders floats through a small section of channel upon leaving the station, then engages a lift hill that takes them on a winding course in the ...
Log transportation method along rivers. In the case of floating logs that have not been drowned but may have been separated from initial logging routes and stuck on the banks of rivers and lakes, a new process is utilized. Here, truck inner tubes are completely deflated so that a diver can slip them over the logs.
In the early days, felled logs were transported using simple methods such as rivers to float tree trunks downstream to sawmills or paper mills. This practice, known as log driving or timber rafting, was the cheapest and most common. Some logs, due to high resin content, would sink and were known as deadheads.