Welland Canal
Increasing lock size

Canal
First (1829)
Second (1846)
Third (1887)
Fourth (1932)
Locks
40
27
26
8
Width (metres)
6.7
8.1
13.7
24.4
Length (metres)
33.5
45.7
82.3
261.8
Depth (metres)
2.4
2.7
4.3
8.2

Question: Which version of the Welland Canal has the most locks and which version has the largest locks?
Answer: The First Welland Canal has the most total locks with 40, the Fourth Welland Canal has the largest locks measuring 24.4 meters wide, 261.8 meters long, and 8.2 meters deep.