Dock System at Y Felinheli is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 3 October 1996. Church. 1 related planning application.
Dock System at Y Felinheli
- WRENN ID
- dusk-threshold-shade
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 3 October 1996
- Type
- Church
- Address
- Dock System at Y Felinheli, Port Dinorwic, LL56 4PA
- OS grid reference
- SH 527 679
- Coordinates
- 53.18805, -4.20474
- Source
- Cadw listing
Description
The dock system at Y Felinheli is approximately 500 metres long, built along the line of a former natural inlet. At the outer, western end of the system is an entrance lock constructed from dressed grey stone, with two wooden lock gates and walkways above, featuring iron posts and chain railings. The inner dock walls are made of red brick and have large stone capstones and dressings, with some capstones replaced with concrete. Ladders are set into the sides of the dock. The dock widens inside the lock before narrowing at a single-leaf bascule bridge. This steel bridge pivots at its southern end and was modified in 1912 with the addition of an electric drive motor. The sloping parapets of the bridge become semi-circular towards the southern end, with teeth that engage with the raising mechanism. East of the bridge, the dock curves and varies in width, following the course of the natural inlet. At the inner end of the system is a dry dock, or graving dock, which can be sealed by a steel caisson. The dry dock has stepped side walls and a polygonal eastern end.
Local climate
Dock System at Y Felinheli sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% 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 23 freeze-thaw cycles a year, fewer than 75% of listed buildings. Of these, 11 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.
More on this building
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- Full EPC report — heating system, energy costs, size, glazing, construction etc.
- Sale history — 5 transactions since 2017
- Related listed building consents — 1 application
- 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
Matched applications, energy data and sale records are assembled automatically and may contain errors. Flag incorrect data.
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