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Caernarvon to Holyhead

Third geodetic levelling, England & Wales.
Geodetic line G159.

Levelling Route

FBM  Caernarvon.   490.1580ft SH 4800 5457
G2750  Groeslon, Tafarn Pennionyn.   - SH 4732 5595
G2751  N face, NE angle of outbuilding at Plas Dolydd, W side of road   - SH 4754 5713
S0354  Llanwnda, Capel Glanrhyd.   - SH 4758 5833
G2752  Bontnewydd.   - SH 4829 5992
G2753  NE face, N angle of Tan Y Bryn, W side of road   - SH 4835 6143
S0353  Stone pillar at junction of walls, W side of road, 1' N from entrance to steps   - SH 4824 6225
G2754  NW face, 1' from N angle of GPO, Caernarvon   - SH 4798 6264
S0352  Caernarfon, Christ Church.   - SH 4809 6314
G2755  Waterloo Port.   - SH 4902 6428
BOLT  Waterloo Port Transfer Bolt - in concrete block 17' NE of hedge, 34' SE of sea wall, Menai Straits   - SH 4872 6422
BOLT  Barras Transfer Bolt - in concrete block in field, 3' from NE side of road, 7' SE of hedge junction   - SH 4803 6555
BOLT  OSBM Bolt in buttress of stone wall, SE side of road, 117' SW of hedge junction   - SH 4807 6635
S7597  S face, 6' from SE angle of school   - SH 4839 6705
G4716  NE angle of house Meas Merllyn, SE side of road   - SH 4733 6684
G4906  SE angle of house Llys Newdd, NW side of road   - SH 4570 6662
S7596  N angle of school, SE side of road   - SH 4445 6558
G4907  NW face, 9' from N angle of outbuilding at Parc Farm, SE side of road   - SH 4339 6524
S7595  N angle of chapel, SE side of road   - SH 4234 6563
BOLT  OSBM Bolt on concrete block at junction of bank & wall, E side of road   - SH 4116 6745
S7594  S angle of chapel, NE side of road   - SH 4075 6883
S7294  N face of Hermon TP   - SH 3907 6875
G4908  NE angle of old school building, SE side of road junction   - SH 3825 6928
G4909  SW angle of Meyrick Arms Hotel, NE side of road   - SH 3876 7019
G4910  SE face, 3' from E angle of bridge abutment, NW side of road   - SH 3785 7086
G4911  E angle of outbuilding at Bodgedwydd Farm, NW side of road   - SH 3625 7149
BOLT  OSBM Bolt on living rock, 50' SE of bridge Pont Glan Felin, W side of road   - SH 3562 7008
S7563  N angle of school, W side of road   - SH 3536 6877
G4912  SE angle of farm house, Merddyn Y Bit at junction of roads   - SH 3494 7006
G4913  W face of outbuilding at Bodelwa Farm, E side of road   - SH 3436 7047
G4914  SE angle of Tycroes Farm   - SH 3494 7240
G4915  W face, 4' from SW angle of Yt'Nyllan Farm House   - SH 3394 7293
S7307  Pendefig.   - SH 3436 7367
G4916  Bryn Hyfryd.   - SH 3429 7521
G4917  NE angle of outbuilding at Plas Llechylched Farm, W side of road   - SH 3433 7673
S7561  Bryngwran.   - SH 3499 7753
BOLT  OSBM Bolt cemented in granite boulder, NE side of road, 200' NW from crossroads   - SH 3366 7804
G4918  NE angle of house Gwaelod Bach, S side of road   - SH 3189 7840
BOLT  OSBM Bolt in concrete on wall junction, NE side of road   - SH 3037 7869
S7556  S face, SE angle of St Michaels Church   - SH 2929 7939
G4943  NE face, E angle of house Arfryn, SE side of main road   - SH 2824 7859
G4988  N face, 10' from NE angle of outbuilding at Castell Crwban, S side of road   - SH 2702 7802
G4989  N angle of Noddfa Chapel, SW side of road   - SH 2579 7882
S7560  NW angle of Cliff Hotel   - SH 2457 7946
G4990  SW face, S angle of outbuilding at Porthdafarch South, N side of road   - SH 2325 8016
G4991  NE face, E angle of Glan Gorsgoch Isaf, NW side of road   - SH 2215 8062
BOLT  OSBM Bolt in rock outcrop, 60' W of road   - SH 2164 8145
G4992  SW face, W angle of chapel Silon   - SH 2283 8251
S7559  W face, SW angle of school, N side of Alderley Terrace   - SH 2418 8258
FBM  Holyhead.   118.7661ft SH 2411 8282

This route is covered by Landranger sheets 114, 115 and 123. (interactive map)


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