counter map and sewer invert elevation
counter map and sewer invert elevation
(OP)
How to read counter map?
See attached image
Are A and B invert elevations or rim elevations? Can both be determined by this number?
How can we find the elevation of the house? C
Is E and F the elevation of street or house? Generally there are 4-5 steps up to first floor of house in front yard on this street.
For D it is a 10” sewer main. What is meaning of 23-83?
For G is R=4.77 the slope of ground?
http://files.engineering.com/getfile.aspx?folder=e...
See attached image
Are A and B invert elevations or rim elevations? Can both be determined by this number?
How can we find the elevation of the house? C
Is E and F the elevation of street or house? Generally there are 4-5 steps up to first floor of house in front yard on this street.
For D it is a 10” sewer main. What is meaning of 23-83?
For G is R=4.77 the slope of ground?
http://files.engineering.com/getfile.aspx?folder=e...





RE: counter map and sewer invert elevation
Would appear that A & B are sewer inverts. Rim elevations normally are put on the drawing, but not in this case. Rim elevations are unkwown.
Regarding: How can we find the elevation of the house? C
Do a survey.
Regarding: Is E and F the elevation of street or house? Generally there are 4-5 steps up to first floor of house in front yard on this street.
I would think that E & F are the elevations of the lot corners.
Regarding: For D it is a 10” sewer main. What is meaning of 23-83?
Unknown, but may be evident if more of the plan is shown. May be manhole numbers.
Regarding: For G is R=4.77 the slope of ground?
I would think that is correct.
RE: counter map and sewer invert elevation
RE: counter map and sewer invert elevation
My guess would be that the 2-line numbers formatted 15" over 20-70' for example is the sewer size and line identification.
5 digit numbers near circles/manholes appear to be inverts inlets and outlets.
Again, I'm just guessing here, go back to the source of your map and ask there.