Location, size and invert elevation of any existing
sanitary or storm sewers, culverts, and drain pipes, the location
of manholes, catch basins, hydrants, electric and communication facilities,
whether overhead or underground, and the location and size of any
existing water and gas mains within the exterior boundaries of the
plat or immediately adjacent thereto. If no sewers or water mains
are located on or immediately adjacent to the tract, the nearest such
sewers or water mains which might be extended to serve the tract shall
be indicated by the direction and distance from the tract, size and
invert elevations.