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.LilGeographersRoom OP t1_j2dtz74 wrote
Reply to comment by DodgingTrains 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
It was right in front of the Zoo entrance on Connecticut Avenue
[deleted] t1_j2dyrnb wrote
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