=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-Sep-1994
Gauge was a Lege stilling well between 1956 and 1974, replaced by
a Lege or Kent 1975-1980.  A Munro stilling well gauge was installed
in February 1980.
Hilbre is an historic station last data 1983
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 02-Jan-2001
Recent work on vertical land movements in the UK can be found from
the University of Nottingham web site:
http://ukcogr.iessg.nottingham.ac.uk/~eosi/
1977-1979 BAD SILTATION PROBLEMS -- NOT FOR PUBLICATION
PRIOR TO 1963 VALUES BASED ON 8 READINGS/DAY.