Revised Local Reference (RLR) Diagram for IMMINGHAM

Station ID: 286

RLR diagram based on the information in the datum section below

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Datum information

Subtract 4.715m from data values 1959-1982 to refer to RLR
Subtract 4.721m from data values 1983-1985 to refer to RLR
Add 2.869m to data values 1986 onwards to refer to RLR
RLR is 12.000m below primary benchmark TA 1989 1630