PITTSBURGH, Nov. 25, 2025 /PRNewswire/ -- "I thought there should be a way to create a flush pavement surface over recessed manhole covers on roadways," said an inventor, from Mount Royal, QC, Canada, ...
I was wondering if the Missoula city street design manual requires that manhole covers be recessed 2 inches to provide an adequate “thump” when driven over. Not only are they annoying, they are ...
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