Combined viaduct and aqueduct called Treffry Viaduct


Heritage Category:
Scheduled Monument
List Entry Number:
Date first listed:
Location Description:
Legacy Record - This information may be included in the List Entry Details.


© Crown Copyright and database right 2021. All rights reserved. Ordnance Survey Licence number 100024900.
© British Crown and SeaZone Solutions Limited 2021. All rights reserved. Licence number 102006.006.
Use of this data is subject to Terms and Conditions.

The above map is for quick reference purposes only and may not be to scale. For a copy of the full scale map, please see the attached PDF - 1007279.pdf

The PDF will be generated from our live systems and may take a few minutes to download depending on how busy our servers are. We apologise for this delay.

This copy shows the entry on 05-Mar-2021 at 11:34:46.


The building or site itself may lie within the boundary of more than one authority.

Location Description:
Legacy Record - This information may be included in the List Entry Details.
Cornwall (Unitary Authority)
Cornwall (Unitary Authority)
National Grid Reference:
SX 05641 57187

Reasons for Designation

The engineering brilliance of the Treffry Viaduct cannot be overemphasised since unless the aqueduct had been calculated precisely the water could not flow. It formed an integral part of a complex network of leats, inclined planes and tram ways which interconnected quarries, mines, china clay works, Par Harbour, and it was intended to link these to Newquay Harbour on the North Cornish coast via Goss Moor. As a concept the combined aqueduct and viaduct was almost ahead of its time and it was the first to be built in Cornwall.


The monument includes a combined viaduct and aqueduct which crosses the Par River in the steeply sided Luxulyan Valley. The combined viaduct and aqueduct survive as a granite-built ten-arched bridge with a span of approximately 200m which stands up to 27m above the valley floor. The aqueduct flows directly beneath the viaduct and the flow of water is controlled by sluice gates at either end. The track bed of the viaduct, which carried a horse drawn tramway, is produced by granite sleepers across the top of the aqueduct and is contained on either side by a high solid parapet. It was built by Joseph Treffry, one of Cornwall's greatest mining adventurers between 1839 and 1844 to carry a mineral railway from St Blazey and Par to Newquay and is the earliest granite construction of its kind in the region. The aqueduct conveys water via leats to nearby Ponts Mill and was used to provide water for the Fowey Consols mine powering the Carmears Inclined Plane by means of a waterwheel en route. Treffry himself was known locally as the 'king of Mid Cornwall' for his engineering and entrepreneurial achievements.

Sources: HER:- PastScape Monument No:-431167


The contents of this record have been generated from a legacy data system.

Legacy System number:
CO 1048
Legacy System:


This monument is scheduled under the Ancient Monuments and Archaeological Areas Act 1979 as amended as it appears to the Secretary of State to be of national importance. This entry is a copy, the original is held by the Department for Digital, Culture, Media and Sport.

End of official listing

Your Contributions

Do you know more about this entry?

The following information has been contributed by users volunteering for our Enriching The List project. For small corrections to the List Entry please see our Minor Amendments procedure.

The information and images below are the opinion of the contributor, are not part of the official entry and do not represent the official position of Historic England. We have not checked that the contributions below are factually accurate. Please see our terms and conditions. If you wish to report an issue with a contribution or have a question please email [email protected].