Location, size and invert elevation of any existing
sanitary or storm sewers, culverts and drain pipes, the location of
manholes, catch basins, hydrants, and 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.