Paging Greg Stephens...for an on-topic answer unlike mine.

I know a couple of ghost stories relating to the Rideau Canal of eastern Ontario (construction supervised by the English Colonel John By, it was designed as a 19th-century shipping/transportation route that would be secure from American depredations).

Rumour has it By's ghost still hangs around the final set of locks where the canal enters the Ottawa River:
http://hauntedontario.netfirms.com/ottawa.html

Also, there was a mill on the Rideau whose owner's young bride came for a tour of the shop. Tragically her cumbersome garments got caught in machinery, causing her death. (This is verified history). Naturally some say her ghost still haunts the old building.

The Rideau was built by Irish and French-Canadian labourers under terrible conditions, at least 500 perished from accidents and malaria as they dug through swampy portions of the route. I've paddled through one of those low-lying sections, a narrow dig near the village of Newboro, and I'd swear it was haunted--quiet, private and spooky, whereas most of the canal is now full of powerboats and fancy cottages.

The ugliest story of the Rideau predates the canal. At the current hamlet of Rideau Ferry there is now a graceful concrete bridge over the fairly wide river channel between Big Rideau and Lower Rideau Lakes. Before the bridge was built, it was called Oliver's Landing, starting in the early 1800's, named after an unsavoury innkeeper/ferryman there. It had an unsavoury reputation for disappearing travellers. Years later when the old inn was torn down, many human skeletal remains were found beneath the basement, giving credence to tales of travellers murdered for their possessions, and possible cannibalism. "Don't eat the soup at Oliver's Inn".

Perhaps irrelevant to your query, but one could argue that the Rideau is a British canal since it was built and funded by British subjects in the colonial era.

W-O