Welland Canal: Locks 4-5-6
Posted by: Groundspeak Premium Member northernpenguin
N 43° 08.312 W 079° 11.576
17T E 646961 N 4777783
Three twinned flight locks allow simultaneous locking of two ships at the same time.
Waymark Code: WM66EV
Location: Ontario, Canada
Date Posted: 04/12/2009
Published By:Groundspeak Premium Member cache_test_dummies
Views: 14

This lock structure is part of the (current) fourth Welland Canal. Here, ships enter the three locks that are linked together and ascend the Niagara Escarpment. This is where the greatest elevation change occurs on the canal - 44 metres by the time all three linked flight locks have been travelled.

The locks are twinned, which allows different ships to travel in opposite directions at the same time.

At Lock #4, the water is also utilized for a hydroelectric power station and you can easily see the surge tower.

From Wikipedia: (visit link)

"Loosely, a flight of locks is simply a series of locks in close-enough proximity to be identified as a separate group. For many reasons, a flight of locks is preferable to the same number of locks spread more widely: crews are put ashore and picked up once, rather than multiple times; transition involves a concentrated burst of effort, rather than a continually-interrupted journey; a lock keeper may be stationed to help crews through the flight quickly; and where water is in short supply, a single pump can recycle water to the top of the whole flight. The need for a flight may be purely determined by the lie of the land, but it is possible to purposely group locks into flights by using cuttings or embankments to "postpone" the height change. Examples: Caen Hill locks, Devizes.

A lock flight should not be confused with a lock staircase. In a flight, each lock has its own upper and lower gates, there is a pound (however short) between each pair of locks, and the locks are operated in the conventional way."
Waterway Name: Welland Shipping Canal

Connected Points:
This lock raises ships over the Niagara Escarpment, connecting Lake Ontario to Lake Erie (in combination with the other 5 locks)

Type: Lock

Date Opened: 01/01/1932

Elevation Difference (meters): 44.00

Site Status: Operational

Web Site: [Web Link]

Date Closed (if applicable): Not listed

Visit Instructions:
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Recent Visits/Logs:
Date Logged Log User Rating  
Bon Echo visited Welland Canal: Locks 4-5-6 12/08/2020 Bon Echo visited it
NFJK visited Welland Canal: Locks 4-5-6 06/29/2012 NFJK visited it
DougandSandra visited Welland Canal: Locks 4-5-6 06/23/2012 DougandSandra visited it
The Blue Quasar visited Welland Canal: Locks 4-5-6 11/20/2011 The Blue Quasar visited it
outsiders2 visited Welland Canal: Locks 4-5-6 10/20/2011 outsiders2 visited it
RockHarder visited Welland Canal: Locks 4-5-6 02/17/2010 RockHarder visited it
northernpenguin visited Welland Canal: Locks 4-5-6 04/10/2009 northernpenguin visited it
aboudreau visited Welland Canal: Locks 4-5-6 02/09/2009 aboudreau visited it

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