Main line 82 miles (132 km) from Dublin to River Shannon with 44 locks. Naas Canal 2.5 miles (4 km) with 5 locks.

Barrow Line from Lowtown to River Barrow at Athy 28 miles (45 km) with 9 locks.

Barrow Navigation from Athy to St. Mullins 41 miles (66 km) with 23 locks. Barrow, Nore and Suir tidal waters 55 miles (88 km).


8.5 ft (2.6m) over a width of 8 ft (2.4m) on curved arches.

Boat dimensions:

61 ft (18.5m) x 13 ft (3.9m) x 4 ft (1.2m). Depths in dry weather and in Dublin are reduced to 3.5 ft (1m).

Barrow Navigation sometimes reduced to 2.5 ft (0.76m).