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Skidding (circa 1900). In mining, quarrying, and forestry, skidding mainly concerned the usual transport of felled or cut material (wood, logs, stone) or extracted material (ores), sometimes cut to size (squared ashlar), to the road, track, river or top of the slope which, from the loader or loading point, enabled it to be transported onwards.
In forestry, a skid cone is a hollow steel or plastic cone placed over the sawn end of a log. When skidding (dragging) logs end-wise, it presents a pointed end that deflects itself past obstacles. Skid cones are most popularly used when skidding single logs behind ATVs or light tractors, particularly when a single operator is too occupied with ...
A slip tongue log skidder used in the 19th and early 20th centuries Elements of a skidding harness. A skidder is any type of heavy vehicle used in a logging operation for pulling cut trees out of a forest in a process called "skidding", in which the logs are transported from the cutting site to a landing.
A logging donkey consists of a steam boiler and steam engine, [5] [6] connected to a winch mounted on a sled called a donkey sled. [7] [8] The donkeys were moved by simply dragging themselves with the winch line, originally hemp rope and later steel cable. They were used to move logs, by attaching lines to the logs and hauling them. [9] [10]
Logs were moved more efficiently by railroads built into remote forest areas, often supported by additional methods like high-wheel loaders, tractors and log flumes. [14] The largest high-wheel loader, the "Bunyan Buggie," was built in 1960 for service in California, featuring wheels 24 feet (7.3 m) high.
Logs further from the road can be shoveled to the landing in a few passes back and forth. Skidding and cable logging can be more cost efficient for logs further from the road. Shovel logging can make use of the loader between log truck arrivals. It can also reduce soil disturbance, since it requires only a single pass to move all the logs in reach.
Cleaner wood since the logs are not skidded on the ground to the landing (in tree length more than full tree) More fresh wood (in tree length more than full tree) Less damage to retained trees in thinning operations; Typically requires fewer types of machines in an operation; No need to clear large landings close to the road
As the names imply the skidding line is used to drag the logs in, and the haulback line is used to drag the skidding line back out for the next turn (or group of logs). A skyline system will add a third line---the skyline whose function is to hold the skidding line and the haulback line off the ground or 'in the sky'.
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