Essential services shall be permitted as authorized and regulated by law and other ordinances of the Village, it being the intention hereof to exempt such essential services from the application of this chapter. For the purposes of this section, essential services shall be interpreted as the erection, construction, alteration or maintenance by public utilities or municipal departments of underground, surface or overhead gas, communication, telephone, electrical, steam, fuel or water transmission or distribution systems; collections, supply or disposal systems, including poles, wires, mains, drains, sewers, pipes, conduits, cables, fire alarm and police call boxes, traffic signals, hydrants and similar accessories in connection therewith which are necessary for the furnishing of adequate service by such utilities or municipal departments for the general public health, safety, convenience or welfare. However, essential services shall not be interpreted to include communication towers, administration and office buildings, substations, structures which are enclosures or shelters for service equipment, maintenance depots, and aboveground features of similar character, and such uses and structures shall not be exempt from the application of this chapter.