Point Lynas Lighthouse
.jpg) The Lighthouse at Point Lynas | |
 | |
| Location | Llaneilian Anglesey Wales United Kingdom |
|---|---|
| Coordinates | 53°24′59″N 4°17′21″W / 53.416287°N 4.289198°W |
| Tower | |
| Constructed | 1766 (first) |
| Automated | 1989 |
| Height | 11 metres (36 ft) |
| Shape | lantern at ground level attached to a square parallelepiped castellated tower as observation room |
| Markings | white tower and lantern |
| Operator | Trinity House[1] [2] |
| Heritage | Grade II listed building  |
| Fog signal | blast every 45s. |
| Light | |
| First lit | 1835 (current) |
| Focal height | 39 metres (128 ft) |
| Lens | first order Fresnel lens |
| Intensity | 89,900 candela |
| Range | 18 nautical miles (33 km; 21 mi) |
| Characteristic | Oc W 10s. |
Point Lynas Lighthouse (Template:Lang-cy) is located on the north coast of Anglesey in North Wales (at grid reference SH479936).
History
This unusual and distinctive lighthouse was designed by Jesse Hartley, engineer to the Mersey Docks and Harbour Board from 1824 to 1860, but with additions by G Lyster some twenty years later.
It is a castellated building comprising a two-storey dwelling surmounted by a square tower 11 metres (36 ft) high. The semicircular lantern is located at the base. The present lantern is 4.6 metres (15 ft) in diameter and dates from about 1874. The lantern has a cast-iron lower wall and rectangular glazing bars take the height to 3.7 metres (12 ft). The lantern is topped by a plain conical roof with a ball finial. The square tower above has a corbelled oriel window of the pilot's look-out.
Original location
Point Lynas was first lit in 1779 at a site about 300 metres (980 ft) south of the present tower, to provide accommodation for Liverpool pilots making use of the shelter at Porthyrysgaw. The site was abandoned for the present position, so that a light could be positioned on the more important north-eastern position, where a tower is not required, as the light sits 39 metres (128 ft) above mean high water.
The lantern
The unusual arrangement of having the lantern at ground level with the look-out and telegraph room above is similar to the Great Orme Lighthouse, also built by the Mersey Docks and Harbour Board. The telegraph station was established in 1879, and two new cottages were erected to accommodate extra staff. Point Lynas has now been taken over by Trinity House.
A Chance Brothers occulting optic was fitted in the light room in 1878. This is 1.4 metres (4 ft 7 in) in diameter and displays a light through 206 degrees. The fixed part of the optic consists of three sections, the central unit on the focal plane has a 0.25 metres (9.8 in) deep curved lens with bands of six prisms above and below it. The bottom unit is made up of six bands of reflective prisms, while the inclined top unit contains sixteen.
The lamp is 1000W with an intensity of 112,000 candela and is white, occulting every 10 seconds, with a range of: 20 nautical miles (37 km; 23 mi)
Electrification and automation
In 1952 the station was electrified and the mechanical elements of the original light-shutter were removed. In 1948 an automatic acetylene fog-gun was installed, but was removed in 1973, when the light was transferred to Trinity House, who fitted electrical emitters. The light was automated in 1989 and is now controlled from Holyhead. As a result, the lighthouse keepers' cottages reverted to Mersey Docks and Harbour Company.
Historical importance
The Lighthouse is considered to be important for its association with Jesse Hartley, the engineer responsible for the world's first great floating-dock system at Liverpool
See also
References
- ^ Point Lynas The Lighthouse Directory. University of North Carolina at Chapel Hill. Retrieved 2 June 2016
- ^ Point Lynas Lighthouse Trinity House. Retrieved 2 June 2016
Sources
- Hague, D., B., The Lighthouses of Wales Their Architecture and Archaeology (The Royal Commission on the Ancient and Historical Monuments of Wales, Edited by Hughes, S., 1994) ISBN 1-871184-08-8
External links
