Lining (steamboat)
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Lining was a method used by steamboats to move up river through rapids. Lining could also be used to lower steamboats through otherwise impassible falls.
Lining involved running a rope, called a line or a steel cable to a secure point on shore, typically a large tree or a bolt specially set in a rock, and then wrapping the cable around a steam-powered winch on the boat. The winch would then crank in the cable, if the vessel was going upstream, or gradually let out the cable, if the vessel was headed downstream.[1]
Use on the Willamette River
Along the Willamette River, in the first decades of the 1900s, the most dangerous obstacles to navigation were Willamette Falls and the Clackamas Rapids. Since 1873 locks at Oregon allowed navigation around Willamette Falls, but as late as 1907, lining was still required to pass the Clackamas Rapids, which were located north of Oregon City, near the mouth of the Clackamas River.