The Junction Navigation
Here is my top-level page about the Junction Navigation, which later became known as the Ballinamore & Ballyconnell Canal and later still as the Shannon–Erne Waterway.
The role of the cads and bounders of the Ulster Canal Company in getting a canal built at taxpayers’ expense
The construction of the Junction Navigation at Aghoo (Lock 4)
Lock gear old and new
The Lagan Navigation
The Ulster Canal
This is the top-level page for non-contentious material on the Ulster Canal.
The Newry Canals
Victoria Lock on the Newry Ship Canal (leads to several subsidiary pages)
Prothero flies north
The Foyle and the Strabane Canal, the Erne in the 1890s and the Armagh Blackwater and Ulster Canal in the 1890s
Minor waterways
The turf canal network on the estate of Scotts of Willsborough near [London]Derry and, a little to the east, the Broharris or Ballykelly Canal.
Unbuilt canals
Here are two short pieces about canals that were never built, which in at least one case was just as well: a canal from Armagh to Moy on the Blackwater and an insane proposal for a canal from Dublin to Lough Neagh.
And here is a memorial [the link is now dead] to what was perhaps the most insane Irish waterway proposal ever. Which, given the competition, is some achievement. If folk want to move boats between the Atlantic and the Erne, or vice versa, why can’t they pay for their own cranage and transport?
Irish waterways history 