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).

Waterways Ireland Online guide to the Grand Canal


IWAI shannon Harbour Website
IWAI Offaly Branch Website
IWAI Dublin Branch Website
IWAI Kildare Branch Website