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Newlands Fish Weir is a post-medieval fish weir situated in Wales on bedrock formed during the Tremadocian period of the Upper Cambrian, a metasedimentary foundation typical of much of Wales's ancient geology. The weir represents a functional structure built to exploit the local river for food production during the early modern period, when such constructions were commonplace across Welsh waterways. Fish weirs of this type operated by directing the flow of water and trapping fish within enclosures as the tide or current subsided, providing a reliable protein source for local communities and sometimes generating income through commercial fishing rights.
The monument stands protected by Cadw, the Welsh Government's historic monuments service, under the reference AN145, recognising its significance as evidence of post-medieval rural economy and water management. The hard metasedimentary bedrock underlying the site would have provided a stable foundation for construction, though the builders would still have needed to work with the natural river dynamics and seasonal water levels to make the weir effective. Such structures often required regular maintenance and rebuilding, as river forces continually challenged their integrity.
Newlands Fish Weir is a scheduled monument protected by Cadw under reference AN145. View the official record →
Newlands Fish Weir is a post-medieval fish weir situated in Wales on bedrock formed during the Tremadocian period of the Upper Cambrian, a metasedimentary foundation typical of much of Wales's ancient geology. It is designated a Scheduled Ancient Monument by Cadw under reference AN145.
Newlands Fish Weir dates from the post medieval period, and is classified as a fish weir. It is one of over 32,000 scheduled monuments protected across the UK.
Newlands Fish Weir is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is AN145.
Several scheduled monuments lie within 10 km, including Ynys Leurad Hut Circles (2.2 km), Tre-Arddur Hut Group (3 km), Felin Wen Tide Mill (3.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Newlands Fish Weir's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Newlands Fish Weir stands on Upper Cambrian, Including Tremadoc, bedrock that formed in the Tremadocian. The rock here is metasedimentary rock.