As big infrastructure costs make any competition impractical so it will operate as a natural monopoly.
A natural monopoly is a type of monopoly that occurs as a result of unusual circumstances in which high start-up costs and significant economies of scale result in only one firm being able to efficiently provide the service in a given territory. A natural monopoly company may be the sole provider, product, or service in an industry or geographic location. Natural monopolies are permitted when a single company can provide a product or service at a lower cost than any potential competitor, but they are frequently heavily regulated in order to protect consumers.
