Revised Local Reference (RLR) Diagram for HEYSHAM

Station ID: 936

RLR diagram based on the information in the datum section below

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Datum information

Subtract 2.285m from data values 1960-1974 to refer to RLR
Add 1.802m to data values 1975 onwards to refer to RLR
RLR is 13.900m below primary benchmark SD 4030 6012