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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 5.475m to data values 1961-1997 to refer to RLR
Add 5.445m to data values 1998 onwards to refer to RLR
RLR is 9.000m below primary benchmark Attached Benchmark (ABM)