Ancient Monuments

History on the Ground

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Roman Bridge Penmachno

A Scheduled Monument in Bro Machno, Conwy

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Latitude: 53.0602 / 53°3'36"N

Longitude: -3.782 / 3°46'55"W

OS Eastings: 280675

OS Northings: 352919

OS Grid: SH806529

Mapcode National: GBR 64.CCSC

Mapcode Global: WH669.WB7V

Entry Name: Roman Bridge Penmachno

Scheduled Date: 3 June 1986

Source: Cadw

Source ID: 3392

Cadw Legacy ID: CN189

Schedule Class: Transport

Category: Bridge

Period: Post Medieval/Modern

County: Conwy

Community: Bro Machno

Traditional County: Caernarfonshire


The monument consists of the remains of a bridge, dating to the medieval or post-medieval period. The bridge has a single segmental arch without parapets. It spans c. 10m and is c. 3m wide, springing from vertical abutments with splayed sides. The monument is now ruinous, although structurally sound.

The monument is of national importance for its potential to enhance our knowledge of medieval or post-medieval construction techniques and transportation systems. It retains significant archaeological potential, with a strong probability of the presence of associated archaeological features and deposits. The structure itself may be expected to contain archaeological information concerning chronology and building techniques.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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