Such uses shall be limited to the erection, construction, alteration or maintenance, by public utilities or municipal or other governmental agencies, of underground or overhead electrical, gas, water transmission or distribution systems or collection, communication, supply or disposal systems, including poles, wires, mains, drains, sewer, pipes, conduits, cables, fire alarm boxes, police call boxes, traffic signals, hydrants and other similar equipment and accessories in connection therewith reasonably necessary for the furnishing of adequate services by such public utilities or municipal or other governmental agencies or for the public health or safety or general welfare, but not including buildings. Open essential services shall not include any human or animal fecal matter or material.