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Holyhead to Conwy

Third geodetic levelling, England & Wales.
Geodetic line G158.

Levelling Route

FBM  Holyhead.   118.7661ft SH 2411 8282
S7558  SW face, S angle of GPO   - SH 2473 8270
S7557  SE angle of Railway Station Hotel   - SH 2480 8217
G4950  NW face, 4' from N angle of 164 London Road   - SH 2545 8167
G4951  NW face, 1' from N angle of Bridge Lodge, Penrhos, SW side of road   - SH 2706 8056
S7555  NW face of Poor Law Institute, SW side of road   - SH 2900 7947
G4952  S face, SW angle of Tabor Hall   - SH 2948 8047
G4953  SE face, 1' from E angle of Ty Newydd Farm   - SH 3097 8076
BOLT  OSBM Bolt on concrete block at production of hedge, W side of road   - SH 3176 8158
S7554  E face of buttress, SE angle of St Machraeth's Church   - SH 3133 8311
BOLT  OSBM Bolt on living rock, Penporth Field, 115' N of hedge, 145' S of hedge, W side of road   - SH 3170 8472
G4954  NW face, N angle of Police Station   - SH 3191 8611
S7553  NE face of church buttress   - SH 3135 8689
G4955  SW face, S angle of Baptist Chapel, Rhyd Wyn   - SH 3148 8897
G4956  N face, NW angle of Bryn Hyfryd House   - SH 3258 8980
G4957  NW face, 9' from W angle of Bryn Siriol   - SH 3238 9124
BOLT  OSBM Bolt on living rock, 31' SW of roadway, 26' from hedge, S side of road   - SH 3191 9234
G4958  SE face, S angle of building, Frondou Farm   - SH 3273 9291
G4959  SW angle, W face of barn at Cafnan Farm   - SH 3434 9304
G4960  W face, 8' from NW angle of Pen Lon Farm   - SH 3578 9296
S7552  NW face, 3' from W angle of Cemaes Bay School   - SH 3730 9344
G4961  W face, NW angle of Rhos Isaf   - SH 3905 9359
G4962  NE face, E angle of Tregynrig Bach   - SH 4056 9352
BOLT  OSBM Bolt on concrete block at fence junction   - SH 4200 9364
BOLT  OSBM Bolt on living rock 17' E of wall, E side of road, 87' S of wall junction   - SH 4294 9378
S7551  E face, SE angle of Junior School   - SH 4407 9311
S7550  SW face, 5' from W angle of Police Station   - SH 4429 9286
G4963  W face, 5' from SW angle of Peniel Chapel, N side of Llaneiloan Road   - SH 4518 9311
BOLT  OSBM Bolt on living rock, 115' E of wall junction, S side of road, 4' N of wall   - SH 4628 9267
G4964  S face, 6' from SW angle of Bryn Awelon   - SH 4665 9200
S7549  NW face, N angle of school at Penysarn   - SH 4620 9069
G4965  NW face, 28' from N angle of Gwylbcoed Farm   - SH 4644 8899
G4966  Llaneuddog, Sardis Chapel.   - SH 4670 8803
G4967  Brynrefail.   - SH 4805 8687
BOLT  OSBM Bolt on boulder 147' NW of wall junction, 102' S of wall junction, 5' E of wall, S side of road   - SH 4920 8558
S7548  NE face, E angle of Llanallgo School   - SH 5054 8525
G4969  NW face, W angle of Tydden Eden Farm House   - SH 5140 8396
S7547  NE face, 29' from E angle of Benllech Congregational Chapel   - SH 5175 8283
G4970  NE face, Groes Wion, 19' from E angle   - SH 5208 8173
G4971  W face, 4' from SW angle of Springholme   - SH 5211 8043
G4972  NW face, W angle of Bull Hotel   - SH 5215 7923
S7546  NE face, 7' from E angle of Pentraeth Rectory   - SH 5253 7850
BOLT  OSBM Bolt on living rock, Afon Braint, SW side of road   - SH 5409 7782
G4973  NE face, 4' from E angle of Bryn Hyfryd House   - SH 5589 7703
BOLT  OSBM Bolt in culvert, 15' E from production of hedge alongside Afon Cadnunt, N side of road   - SH 5699 7641
G4974  S face, 25' from SE angle of lodge to Home Farm   - SH 5915 7642
S7545  NW face, 4' from W angle of Beaumaris Grammar School   - SH 6059 7623
S7544  SW angle of Beaumaris Post Office, NE side of Church Street   - SH 6050 7611
BOLT  OSBM Bolt on living rock, NW side of road, 555' SW of milestone 'Beaumaris 1M'   - SH 5928 7488
BOLT  North Terminal Transfer Bolt - in concrete block 22' NE of path in grounds of Gazelle Hotel   - SH 5799 7403
BOLT  Garth Transfer Bolt - in concrete roof of building SW of Garth Pier   - SH 5840 7316
G2762  S face of living rock, N side of road, 131' E from wall junction   - SH 5906 7251
S0335  NE face of stone wall, SW side of road, 27' SE from fence junction   - SH 5915 7238
G2763  SE face, 12' from E angle of Penrhyn Home Farm buildings   - SH 5949 7131
G2764  E face, 17' from NE angle of Lyric Cottage, W side of road   - SH 5980 7088
BOLT  OSBM Bolt on S end of parapet of railway bridge, 29' N of hedge junction   - SH 6078 7099
G2765  SE face, 7' from S angle of Tan Y Lon, NW side of road   - SH 6191 7112
G2766  SE face, 7' from E angle of dairy of Wig Farm, NW side of road   - SH 6355 7211
G2767  SE face, 7' from E angle of outbuilding at University College Farm, NW side of road   - SH 6520 7273
G2768  SE face, 2' from S angle of Madfryn Farm building, N side of road   - SH 6645 7347
G2769  Llanfairfechan, Church.   - SH 6814 7470
G2770  SE face, 29' from E angle of Bron-Menai Cottages, NW side of road   - SH 6915 7586
G2771  N face, 1' from NE angle of Goat Inn, S side of road   - SH 7057 7617
S0333  Penmaenmawr.   - SH 7181 7629
G2772  SE face, 3' NE from angle of walls of St Seriol's Church, NW side of road   - SH 7218 7651
G2773  NW face, 9' from angle of outbuilding of farm, SE side of road   - SH 7285 7677
G2774  NW face, 2' from N angle of Fairyglen Hotel, SE side of road   - SH 7440 7659
BOLT  OSBM Bolt in rock 6' NE & 36' N from junction of F.R. & Old Conway Road, N side of road   - SH 7496 7707
FBM  Conwy.   618.4259ft SH 7552 7746

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


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