Essential Services, Enclosed or Permanent Structures. Such uses shall include electric substations, transformers, switches and auxiliary apparatus serving a distribution area, and water pumping stations, water towers, sewage pumping stations, and package sewage treatment plants. They shall be subject to the following regulations:

Essential Services Open. Such uses shall be limited to the erection, construction, alteration or maintenance by public utilities or Borough for other governmental agencies, or as approved by a Borough agency as part of a development plan approval, of underground gas, oil, electrical, telephone, steam, water or sewage transmission lines or systems and underground and/or surface equipment, including but not limited to poles, wires, mains, drains, sewers, pipes, conduits, cables, fire alarm boxes, police call boxes, traffic signals, hydrants, and other similar equipment and accessories. Such facility shall be reasonably necessary for the furnishing of adequate service by such public utilities, Borough, other governmental agencies or private or semi-private entities if approved by a municipal agency as part of a development plan application, in furtherance of the public health, safety or general welfare.