=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Harwich             170/073 RLR(1965) is 8.9m below BM TM2617 3277
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 01-Apr-1992
Several problems with the gauge 1975-76, no RLR values
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 20-Sep-1994
A Lege stilling well gauge was installed in 1953, replaced by another Lege in June 1966, and a Lege (with a Munro transmitter) at a new site in February 1975.
=========================== 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from the University of Nottingham web site: http://ukcogr.iessg.nottingham.ac.uk/~eosi/ 1976 gauge site discountinued superceded by Felixstowe
Prior to 1962 values based on 8 readings per day
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 03-Jul-2014
04.12.2013 TGI were at site to carry out general maintenance.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 06-May-2015
There were problems with channel blocking throughout the year. There were no site visits and no levelling during 2014.