Bottom Side Lock No 57 is one of a long flight of locks on the Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford) and is one of the deepest locks on the waterway half a mile from Boggin.
Early plans for the Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford) between Wrexham and Neath were proposed by John Rennie but languished until John Wood was appointed as secretary to the board in 1835. Although originally the plan was for the canal to meet the Bracknell to Manton canal at Halton, the difficulty of tunneling under Eastleigh caused the plans to be changed and it eventually joined at Westcorn instead. Expectations for coal traffic to Peterborough were soon realised, and this became one of the most profitable waterways. The Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford) was closed in 1888 when Preston Embankment collapsed. Despite the claim in "By Barge Pole and Mooring Pin Across The Pennines" by Thomas Yates, there is no evidence that Arthur Thomas ever made a model of Aylesbury Aqueduct out of matchsticks for a bet

Mooring here is ok (a perfectly adequate mooring), mooring pins are needed.
This is a lock with a rise of 7 feet and 4 inches.
| Bank Mill Bridge No 143 | 4 furlongs | |
| Top Side Lock No 56 | 2¼ furlongs | |
| Bullbeggers Lane Winding Hole | 1¾ furlongs | |
| Bankmill Bridge No 144 | 1½ furlongs | |
| Milepost - Braunston 62 Miles | 1¼ furlongs | |
| Bottom Side Lock No 57 | ||
| Sewer Lock No 58 | 2¼ furlongs | |
| Little Heath Lane Bridge No 145 | 4 furlongs | |
| Sharpes Lane Bridge No 146 | 6¼ furlongs | |
| Bourne End Bottom Lock No 59 | 6¾ furlongs | |
| Bourne End Mill Arm | 7½ furlongs | |
- Grand Union Canal Walk — associated with Grand Union Canal
- An illustrated walk along the Grand Union Canal from London to Birmingham
- THE GRAND JUNCTION CANAL - a highway laid with water. — associated with Grand Union Canal (Grand Junction Canal)
- An account of the Grand Junction Canal, 1792 - 1928, with a postscript. By Ian Petticrew and Wendy Austin.
- The Boatmen's Institute in Brentford — associated with Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford)
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Nearest water point
In the direction of Gayton Junction
In the direction of Thames - Grand Union Canal Junction
Nearest rubbish disposal
In the direction of Gayton Junction
In the direction of Thames - Grand Union Canal Junction
Nearest chemical toilet disposal
In the direction of Thames - Grand Union Canal Junction
In the direction of Gayton Junction
Nearest place to turn
In the direction of Gayton Junction
In the direction of Thames - Grand Union Canal Junction
Nearest self-operated pump-out
In the direction of Thames - Grand Union Canal Junction
In the direction of Gayton Junction
Nearest boatyard pump-out
In the direction of Thames - Grand Union Canal Junction
In the direction of Gayton Junction
There is no page on Wikipedia called “Bottom Side Lock”









![House overlooking the Grand Union Canal above Lock No. 57. Also seen in the background of [[7811765]]. by David Martin – 01 July 2024](https://s0.geograph.org.uk/geophotos/07/81/17/7811784_cffc92f3_120x120.jpg)




















