Chalmore Lock

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title: "Chalmore Lock" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["locks-of-oxfordshire", "locks-on-the-river-thames", "weirs-on-the-river-thames", "former-structures-on-the-river-thames"] description: "Lock and weir on the River Thames in England" topic_path: "general/locks-of-oxfordshire" source: "https://en.wikipedia.org/wiki/Chalmore_Lock" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Lock and weir on the River Thames in England ::

::data[format=table title="Infobox waterlock"]

Field	Value
waterway	River Thames
country	England
county	Oxfordshire
maint	Environment Agency
first	1838
fall	18 in
::

| name = | native_name = | image = | image_upright = | alt = | caption = | waterway = River Thames | country = England | province = | state = | county = Oxfordshire | maint = Environment Agency | operation = | first = 1838 | latest = | length = | width = | fall = 18 in | sealevel = | enda = | distenda = | endb = | distendb = | heritage = | map_image = | map_size = | map_alt = | map_caption = | pushpin_map = | pushpin_map_size = | pushpin_map_alt = | pushpin_map_caption = | coordinates = | extra = Chalmore Lock was a lock and weir which operated between 1838 and 1883 on the River Thames in England near Wallingford, Oxfordshire.

History

Chalmore Lock was built in 1838 by the Thames Navigation Commissioners at a place called Chalmore Hole between Cleeve Lock and Benson Lock. It was built as a summer or low-water lock. For much of the time the lock was open at both ends and the fall was only 18 inches when the water level reached its lowest in summer. It was described at the time of construction as "a weir and two pairs of gates similar to pound gates to pass boats when the weir is shut in". Its usefulness was demonstrated shortly after its construction, when a barge stranded upstream in the shallows was set in motion within five minutes of closing the gates. The lock was provided with a lock keeper and tolls were exacted for its use. However it fell into disrepair, and the Thames Conservancy was anxious to remove it. Nevertheless, from 1874 onwards, the inhabitants of Wallingford campaigned strongly to keep the lock fearing consequences to the town of its removal. In 1881 Thames Conservancy dredged the river below Wallingford Bridge at "enormous cost" and in the winter floating ice swept away much of the weir. In 1883 the lock was finally removed.

Literature and the media

Chalmore Lock gives rise to an anecdote in Three Men in a Boat by Jerome K. Jerome. In it the author recollects an experience of rowing a young lady downstream from Benson Lock expecting to reach "Wallingford Lock" in a short time. Unaware that the map is out of date and that the lock has been removed he and she experience increasing alarm as they continue on the six-mile stretch in the darkening evening to end at Cleeve Lock.

William Staniland included "The lay of Chalmore Lock" among his Songs after Sunset in 1884.

References

References

1. [http://www.british-history.ac.uk/report.aspx?compid=43256 ''The borough of Wallingford: Introduction and castle'', A History of the County of Berkshire: Volume 3 (1923), pp. 517–531 Date accessed: 14 April 2010]
2. Fred. S. Thacker ''The Thames Highway: Volume II Locks and Weirs'' 1920 – republished 1968 David & Charles pp. 197–200
3. (November 2016)
4. (1889). "Three men in a boat". Folio Society.
5. [https://books.google.com/books?id=GssIAAAAQAAJ&q=%22Chalmore+Lock%22 William Staniland ''Songs after Sunset'']

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