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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 6.191m to data values 1957-2009 to refer to RLR
Add 6.261m to data values 2010 onwards to refer to RLR
RLR is 10.200m below primary benchmark Tidal BM 2001