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Caernarvon Fundamental Bench Mark   


Location
Grid reference: SH 4800 5457.
Landranger 115: Snowdon & Caernarfon.
Landranger 123: Lleyn Peninsula.
Explorer OL17: Snowdon / Yr Wyddfa.
Explorer 254: Lleyn Peninsula East.
GPS network passive station: H1SH4854.
Waypoint: FM0520.

Neighbouring Flush Brackets
G2709 Dafarn Dudur 786.45m to the west.
G2750 Groeslon, Tafarn Pennionyn 1.54km to the northwest.
G2630 Penygroes 1.67km to the southwest.
G2751 Plas Dolydd 2.60km to the north.
S0317 Llanllyfni 2.83km to the south.
The nearest fundamental bench mark is Trawsfynydd, 29.03km to the southeast.

Third Geodetic Levelling, England & Wales (1950-68)
This fundamental bench mark was used during the Third geodetic levelling, England & Wales, and was levelled with a height of 490.1580 feet [149.4002 metres] above mean sea level (Newlyn datum). It was included on the Caernarvon to Conwy, Caernarvon to Holyhead and Trawsfynydd to Caernarvon levelling lines.

Logged Visits
Visited on 8th October 2016 by Father Ted. Condition: Good.
Pigs seem to be farmed here at present plus the dogs are still barking. FBM on footpath just past farmyard.

Visited on 29th September 2016 by Dusty. Condition: Good.
Photo at http://trigpointing.uk/trig/520

Visited on 13th September 2015 by Dugswell2. Grid reference: SH 48015 54574. Condition: Good.
FBM easily found after longish walk in from the north with Alex Cameron. It was harder to find and follow the footpaths than find the FBM.

Visited on 13th October 2013 by mickandkim. Grid reference: SH 4800 5457. Condition: Good.
In good order

Visited on 3rd July 2007 by Meirion. Condition: Good.
Easy to find, just beyond the Farmhouse with lots of angry dogs, which were all chained up! Thankfully! The farmer was very friendly and most helpful.
If you have any corrections or additions to this record, please let us know.
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