Surveyors place these as points of measurement to work from for their survey. This is known as a “mag” or magnetic nail with some flagging around it. These are usually flush with surfaces although with the flagging they do stick up just a bit. They often need these points for a significant period of time depending on the project. It is placed in the sidewalk because it is easy to nail it in and it is public property.

Thank you.

Just wondering what they could be doing on the street.

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