Liverpool tide gauge site

The tide gauge is located within the Old Lock Keeper's Office at the entrance to Gladstone Dock. The pressure points are located on the seaward side of Gladstone Lock.
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Tide gauge building

The tide gauge consists of a pneumatic bubbler system supplying two full tide pressure points. These are mounted on steelwork attached to an access ladder on the seaward side of the dock entrance. Both pressure lines, wind speed and direction are monitored by the POL data logger.

The tide gauge is levelled to the tide gauge bench mark supported by Ordnance Survey auxiliary marks.

External users

Sea level pressures and/or elevations from this site are supplied to the following authority:

• Environment Agency, North West Region

Site history

1991 – DATARING system installed with two full tide pressure points and datum probe
1995 – Wind speed and direction instruments installed
2000 – POL data logger installed
2001 – Mid-Tide pressure point installed
2003 – Wind speed & direction instrument failed