Garston Lock was built between 1718 and 1723 under the supervision of the engineer John Hore of Newbury, and this stretch of the river is now administered by Canal And River Trust and known as the Kennet Navigation. It has a rise/fall of 7 ft 7ins (2.29m).
One of only two remaining working examples of turf sided locks on the canal (the other being Monkey Marsh Lock), Garston Lock has been described as needing "more water to operate than the now more common brick or stone-sided variety" as the sloping sides increase the volume of the lock.
The two sets of lock gates work differently: the upper set operates via a mechanical system, while the lower gates are hydraulic. The top part of the lock chamber has sloping banks which are covered by vegetation of various types rather than by turf. An arrangement of steel rails ensure that boats stay in the centre of the lock during the rise/fall of 7 ft 7 in (2.31 m).
- Pearson, Michael (2003). Kennet & Avon Middle Thames:Pearson's Canal Companion. Rugby: Central Waterways Supplies. ISBN 0-907864-97-X.
- Allsop, Niall (1987). The Kennet & Avon Canal. Bath: Millstream Book. ISBN 0-948975-15-6.
- Shead, Jim. "All Change for the K&A". Waterways Information. Retrieved 26 October 2010.
- "Garston Lock". Waterscape.com. Retrieved 2006-09-16.
- "Garston Lock". English Heritage, Viewfinder. Retrieved 2006-09-16.
- "All change for the K&A". Retrieved 2006-09-16.
- "Garston Lock". Images of England. Retrieved 2006-09-16.
- "Pillbox at NW Corner of Garston GV Lock". Images of England. Retrieved 2006-09-16.
- "Pillbox at SE Corner of Garston GV Lock". Images of England. Retrieved 2006-09-16.
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Grid reference: SU655707