10/09/2026
How do you unload 6,000 tons of logs? Let gravity do the work.
In 1953, Robert F. Allan designed British Columbia’s first self-dumping log barges, Powell No. 1 and Powell No. 2, for Kingcome Navigation, the marine arm of MacMillan Bloedel and Powell River Co. The principle was elegantly simple: seawater flooded a tipping tank, causing the barge to heel until the logs slid into the water. With the cargo released, the barge floated higher and the tank drained by gravity.
The benefits extended well beyond unloading. Carrying logs aboard barges instead of towing them in rafts or bundles meant faster delivery, far fewer weather delays and substantial cost savings. It also delivered better-quality timber, with far less time spent immersed in salt water. Robert Allan Ltd. would go on to design at least 16 of BC’s 25 purpose-built log barges, many self-loading as well as self-dumping, up to 20,000 DWT, transforming log transportation along the BC coast.
Thanks to the qathet Museum and Archives for the images!