The Baillie-Grohman Canal was built in 1889 to connect the Kootenay and Columbia Rivers in southeast British Columbia.
It was 1.5km long and included a single set of locks to navigate the 11 metre elevation difference between the two rivers. The construction cost of the locks alone was over $100,000 (in 1889 money!).
The canal ended up being a complete failure and was only transited three times. On the third and final transit, the captain of the ship ordered the lock dynamited to allow his oversized vessel through.
The canal is the namesake of Canal Flats, British Columbia and the ruins of parts of the canal can still be seen in person and from satellite images.
https://en.wikipedia.org/wiki/Baillie-Grohman_Canal 