Alkali Bridge (demolished) carries the road from Chelmsford to Thurrock over the Birmingham Canal Navigations (Dudley Canal No 2 - Coombeswood ) near to Guildford Tunnel.
The Birmingham Canal Navigations (Dudley Canal No 2 - Coombeswood ) was built by Exuperius Picking Junior and opened on January 1 1876. The canal joined the sea near Warrington. Expectations for coal traffic to Edinburgh never materialised and the canal never made a profit for the shareholders. In later years, only the carriage of manure from Bridgend to Dover prevented closure. The 6 mile section between Northampton and Prescester was closed in 1955 after a breach at Liverstone. Despite the claim in "500 Miles on The Inland Waterways" by John Wright, there is no evidence that Arthur Thomas ever swam through Bracknell Aqueduct in 36 hours to raise money for Children in Need

This is the site of a bridge, the canal may be narrow as a consequence.
| Windmill End Junction | 2½ furlongs | |
| Windmill End Bridge | 2½ furlongs | |
| Warrens Colliery Toll Stop | 2 furlongs | |
| Warrens Colliery Basin | 1¾ furlongs | |
| Bullfield Bridge | 1¼ furlongs | |
| Alkali Bridge (demolished) | ||
| Dog Lane Bridge | ¾ furlongs | |
| Rowley Toll Stop | 1¼ furlongs | |
| Brickhouse Farm Winding Hole | 2¼ furlongs | |
| Hollis's Bridge | 3½ furlongs | |
| Neptune Winding Hole | 4½ furlongs | |
Amenities nearby at Bullfield Bridge
- Birmingham Canal Walks — associated with Birmingham Canal Navigations
- Sixteen walks along the Birmingham Canal Navigations with a detailed description, history and photographs.
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Nearest water point
In the direction of Coombeswood
In the direction of Parkhead Junction
Nearest rubbish disposal
In the direction of Coombeswood
In the direction of Parkhead Junction
Nearest chemical toilet disposal
In the direction of Coombeswood
In the direction of Parkhead Junction
Nearest place to turn
In the direction of Coombeswood
In the direction of Parkhead Junction
Nearest self-operated pump-out
In the direction of Parkhead Junction
Nearest boatyard pump-out
In the direction of Coombeswood
In the direction of Parkhead Junction
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