Quarry Incline at Cwm Penmachno (upper part) is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 17 July 1992. Incline.
Quarry Incline at Cwm Penmachno (upper part)
- WRENN ID
- tilted-chalk-woodpecker
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 17 July 1992
- Type
- Incline
- Address
- Quarry Incline at Cwm Penmachno (upper part), Bro Machno, Conwy
- OS grid reference
- SH 751 468
- Coordinates
- 53.00433, -3.86262
- Source
- Cadw listing
Description
The Quarry Incline at Cwm Penmachno is a water balanced incline with two tracks, built across a series of quarry terraces. It is made of slate waste rubble and features two parallel tracks that have a surface of flat slabs. The incline rises to a height of approximately 5 meters from the ground, although this height varies according to the terracing of the quarry, and it has a width of about 4 meters. The sides of the incline are supported by deep slate rubble buttresses that extend above the trackway. At the lower section, there is an archway that is around 2 meters high and wide, constructed with drystone slate rubble voussoirs. At the top of the incline, there is a stepped platform that includes the remains of a former drumhouse, with steps leading up to the platform from ground level on the west side. The incline above the former drumhouse platform continues in a fragmentary state and is not considered of special interest.
Local climate
Quarry Incline at Cwm Penmachno (upper part) sits in one of the wettest parts of the UK, with an average of 1,370 mm of rain a year. This makes it wetter than 96% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 93% of listed buildings.
It experiences an average of 49 freeze-thaw cycles a year, more than 90% of listed buildings. Of these, 29 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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