Mystery WMATA/Metro survey markers: Can any intrepid city planners or engineers explain what these discs are (or were) used for? I seem them all over the place, even sometimes away from Metro stops.TorontoNeverSkeets t1_j29p2l1 wrote
Reply to comment by LilGeographersRoom in Mystery WMATA/Metro survey markers: Can any intrepid city planners or engineers explain what these discs are (or were) used for? I seem them all over the place, even sometimes away from Metro stops. by LilGeographersRoom
My guess is because they’re for doing monitoring on/around wmata property. Probably used for some combination for new construction and or vibration/settlement monitoring.
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