|Waterway||River Lee Navigation|
|Maintained by||British Waterways|
|Length||85 feet (25.9 m)|
|Width||16 feet (4.9 m)|
|Fall||5 feet 6 inches (1.7 m)|
|22.5 miles (36.2 km)|
Hertford Castle Weir
|3.8 miles (6.1 km)|
The lock has a reputation as being difficult to negotiate. 
To the east of the lock is the Amwell Quarry nature reserve a Site of Special Scientific Interest (SSSI)  and a section of the Old River Lea known as the Amwell Magna Fishery where it merges with its tributary the River Ash .
The New River flows close by to the west.
The lock is located on the River Lee Navigation towpath which is part of the Lea Valley Walk
|Next lock upstream||River Lee Navigation||Next lock downstream|
Grid reference: TL3689513388