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If the image above appears blurry, or you would like to see a larger image, please view the full-sized image of the RLR diagram.
Add 6.269m to data values 1937-1952 to refer to RLR
Add 6.256m to data values 1953-1955 to refer to RLR
Add 6.263m to data values 1956 onwards to refer to RLR
RLR is 13.100m below primary benchmark 71 PP