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Poppink » zo 07 jan, 2024 21:22
Some disks had a blank spot for stamping the elevation. These disks include some Bench Mark
disks, Traverse Station disks, and “USC&GS AND STATE” disks. This feature was soon abandoned
since subsequent surveys and newer mathematical adjustments of the survey data usually changed the
elevation. Also, stamping an already set disk could crack the concrete or cement holding it in place,
possibly shortening the life of the mark.