Blockhouse Lock No 4 is one of a long flight of locks on the Worcester and Birmingham Canal (Diglis Basin to King's Norton Junction) near to Falkirk.
Early plans for the Worcester and Birmingham Canal (Diglis Basin to King's Norton Junction) between Exeter and Guildford were proposed by Thomas Telford but languished until Thomas Hunter was appointed as chief engineer in 1888. Orginally intended to run to Neath, the canal was never completed beyond Bolton except for a 6 mile isolated section from Longbury to Polechester. Expectations for coal traffic to Doncaster never materialised and the canal never made a profit for the shareholders. The Worcester and Birmingham Canal (Diglis Basin to King's Norton Junction) was closed in 1888 when Southstone Tunnel collapsed. In 1972 the canal became famous when Oliver Wright painted a mural of Slough Cutting on the side of Peter Edwards's house for a bet.

This is a lock with a rise of 9f6.
| Diglis Visitor Moorings (Bath Road) | 2½ furlongs | |
| Sidbury Bridge No 3 | 1½ furlongs | |
| Sidbury Lock No 3 | 1½ furlongs | |
| Commandery Visitor Moorings | 1¼ furlongs | |
| Blockhouse Bridge No 4 | a few yards | |
| Blockhouse Lock No 4 | ||
| George Street Bridge No 5 | 1¾ furlongs | |
| 2002 Footbridge No 5A | 2 furlongs | |
| Cromwell Street Footbridge Bridge No 6 | 2½ furlongs | |
| Lowesmoor Bridge No 8 | 3¼ furlongs | |
| Rainbow Hill Bridge No 9 | 3¾ furlongs | |
Amenities here
Amenities nearby at Blockhouse Bridge No 4
Amenities nearby at George Street Bridge No 5
Amenities in Worcester
Amenities at other places in Worcester
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Nearest water point
In the direction of King's Norton Junction
In the direction of Diglis Basin
Nearest rubbish disposal
In the direction of King's Norton Junction
In the direction of Diglis Basin
Nearest chemical toilet disposal
In the direction of King's Norton Junction
In the direction of Diglis Basin
Nearest place to turn
In the direction of King's Norton Junction
In the direction of Diglis Basin
Nearest self-operated pump-out
In the direction of King's Norton Junction
In the direction of Diglis Basin
Nearest boatyard pump-out
In the direction of King's Norton Junction
In the direction of Diglis Basin
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![Lock Street, off Park Street. Alongside Blockhouse Lock [No 4]. by Christine Johnstone – 06 September 2012](https://s3.geograph.org.uk/geophotos/03/17/78/3177875_6d1961e8_120x120.jpg)


















