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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 6.289m to data values 1957-1958 to refer to RLR
Add 6.243m to data values 1959-1966 to refer to RLR
Add 6.393m to data values 1967 onwards to refer to RLR
RLR is 18.000m below primary benchmark Pilar de Mareas