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10.0 DEFINITIONS Following are a list of definitions for technical terms used in this Application: ' Avian Of or relating to birds. Breaker Device for opening a circuit. ' Bus An electrical conductor that serves as a common connection for two or more electrical circuits; may be in the form of rigid bars or stranded conductors or cables. Conductor A material or object that permits an electric current to flow easily. Corona The breakdown or ionization of air in a few centimeters or less immediately surrounding conductors. Double circuit The construction of two separate circuits at the same or different voltage on the same structures to increase capacity of the line. Electric Field("EF") The field of force that is produced as a result of a voltage charge on a conductor or antenna. Electromagnetic The term describing the relationship between electricity and magnetism; a quality that combines both magnetic and electric properties. Electromagnetic Field The combination of an electric (E) field and a magnetic (H)field, such as in ("EMF") high frequency radiating fields. For the lower frequencies associated with , power lines, EMF should be separated into electric and magnetic fields. Electric and magnetic fields arise from the flow of electricity and the voltage of a line. The intensity of the electric field is related to the voltage of the line. The intensity of the magnetic field is related to the current flow through the conductors. Electromotive Force The force (voltage) that produces an electric current in a circuit. ' Excavation A cavity formed by cutting,digging,or scooping. Fauna The collective animals of any place or time that live in mutual association. Flora The collective plants of any place or time that live in mutual association. Grading To level off to a smooth horizontal or sloping surface. Grounding To connect electrically with a ground;to connect some point of an electrical circuit or some item of electrical equipment to earth or to the conducting medium used in lieu thereof. Habitat The place or environment where a plant or animal naturally or normally lives and grows. High Voltage Overhead and underground conducting lines of either copper or aluminum Transmission Lines used to transmit electric power over relatively long distances, usually from a ("HVTL") central generating station to main substations. They are also used for electric power transmission from one central station to another for load sharing. In Minnesota, a HVTL is a conductor of electric energy and associated facilities designed for and capable of operating at a nominal voltage of 100 kilovolts or more either immediately or without significant modification (associated facilities include, but not be limited to, insulators, towers, substations,and terminals). See Minn. Rules 7850.1000,Subp. 9. Orono Project June 7, 2011 MPUC Docket No. E002/TL-11-223 74