Central City, Kentucky bituminous coal underlying the bedrock. Central City has a number of old underground coal mine shafts that still crisscross the city. Most of these old shafts date back to the early 1900s. The majority of terrain around the city limits is reclaimed land where surface mining has taken place. As of the census of 2000, there were 5,893 people, 2,065 households, and 1,410 families residing in the city. The population density was 1,126.2 people per square mile (435.0/km). There were 2,313 housing units at an average density of 442.0 per square mile (170.8/km). The racial makeup of the city was
Central London Railway 1939 were converted for use as a protected control centre for the Central Electricity Board. Central London Railway The Central London Railway (CLR), also known as the Twopenny Tube, was a deep-level, underground "tube" railway that opened in London in 1900. The CLR's tunnels and stations form the central section of the London Underground's Central line. The railway company was established in 1889, funding for construction was obtained in 1895 through a syndicate of financiers and work took place from 1896 to 1900. When opened, the CLR served 13 stations and ran completely underground in a pair of tunnels for