jester02k

jester02k t1_ispwpwy wrote

Some of the sidewalks in Boston have voids under them for Water,Power, and Steam (Heat). It makes for easier access to them for repairs and upgrades. I think the one in your picture is one due to the caulking along the edges to keep the water out hence the steep pitch. Edit: Oh I forgot the steam heat pipes add the benefit of heating the sidewalk so light snow storms it just melts like a dusting.

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