Location, size, and invert elevation of any existing sanitary or
storm sewers, culverts and drainpipes, 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.