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Length of underground energy transmission network cables (km) (Regional)



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This FACT indicates the total length of energy transmission networks (underground cables) in kilometres in each state, measured between 2014-2015. This number is represented in thousands. Underground energy lines are beneficial to a city for a number of reasons, firstly, because they have less of a visual and environmental impact, which typically generate large opposition from local communities. Another benefit is that they have lower transmission losses and can absorb emergency power loads. They also have lower maintenance costs, emit no electric field and can be engineered to emit a lower magnetic field than an overhead line. They require a narrower band of land to install are less susceptible to the impacts of severe weather. The disadvantages are that the initial costs are high, and if there is a malfunction, it can be more difficult to repair. The state with the largest length of these netowrks is New South Wales, at 40,229 km. The state/territory with the smallest number is Northern Territory, at 1,510 km.


Source: Bureau of Infrastructure, Transport and Regional Economics, 2017

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