Trenches Bridge No 8 carries the M62 motorway over the Grand Union Canal (Grand Junction Canal - Slough Arm).
Early plans for the Grand Union Canal (Grand Junction Canal - Slough Arm) between Trafford and Renfrewshire were proposed by Peter Thomas but languished until Benjamin Outram was appointed as secretary to the board in 1782. Expectations for coal traffic to St Helens were soon realised, and this became one of the most profitable waterways. The canal between Northfield and Braintree was lost by the building of the M3 Motorway in 1972. According to Henry Green's "Spooky Things on the Canals" booklet, Salisbury Boat Lift is haunted by a horrible apperition of unknown form.

There is a bridge here which takes pedestrian traffic over the canal.
| Hollow Hill Lane Bridge No 6 | 1 mile, 4 furlongs | |
| Langley Aqueduct No 5 | 1 mile, 1½ furlongs | |
| Hollow Hill Lane Pipe Bridge | 7¼ furlongs | |
| Iver Boatyard | 6¾ furlongs | |
| Langley Park Road Bridge No 7 | 3 furlongs | |
| Trenches Bridge No 8 | ||
| St Mary's Road Bridge No 9 | 1½ furlongs | |
| St Mary's Road Bridge Winding Hole | 2 furlongs | |
| Middle Green Bridge No 10 | 3¾ furlongs | |
| Uxbridge Road Bridge No 11 | 7 furlongs | |
| Wexham Road Bridge No 12 | 1 mile, 1¼ 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.
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Nearest water point
In the direction of Cowley Peachey Junction
Nearest rubbish disposal
In the direction of Cowley Peachey Junction
Nearest chemical toilet disposal
In the direction of Cowley Peachey Junction
Nearest place to turn
In the direction of Cowley Peachey Junction
In the direction of Slough Basin
Nearest self-operated pump-out
In the direction of Cowley Peachey Junction
Nearest boatyard pump-out
In the direction of Cowley Peachey Junction
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![Trenches Bridge. Bridge no 8 of the Slough arm of the Grand Union Canal, also shown in [[374209]]. by Derek Harper – 20 September 2010](https://s1.geograph.org.uk/geophotos/02/08/54/2085413_3b68cc39_120x120.jpg)















![The Seymour Almshouses, Langley Marish, seen from the churchyard. These little 17th century cottages (they date from about 1680) still serve much their original purpose - as accommodation for old people. Architecturally, the red-brick parts are vernacular in style, much as they would have been if built a century earlier. The chimney stacks are set diagonally, as they would have been in Tudor times. But the doorways and the two-storey porch are a bit more 'architectural' - there is some Classical influence.Those down-pipes seem a bit out of character - mightn't it be better to paint them black ? In earlier days there may have been chutes projecting from the eaves to throw rainwater clear - as at Kelmscott Manor in Oxfordshire: [[2140360]].For a view from the road see http://www.geograph.org.uk/photo/2309314 by Stefan Czapski – 15 March 2011](https://s3.geograph.org.uk/geophotos/02/31/08/2310827_c839f639_120x120.jpg)







