The obvert elevation of a pipe is the elevation of the inner top surface of the pipe (as opposed to "invert" which is the inner bottom surface of the pipe). Invert (and obvert) is usually used in reference to pipe and not manholes, since the invert elevation is where the water flow calculations begin. Based on this interpretation, the obvert (at a manhole) can be measured as the distance from the manhole rim to the inside top of the pipe(s).

The top inside level of a pipe, culvert etc.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -B--RT. That is, six letter words with 2nd letter B and 5th letter R and 6th letter T. In alphabetical order, they are:

obvert

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -BV-R-. That is, six letter words with 2nd letter B and 3rd letter V and 5th letter R. In alphabetical order, they are:

obvert