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The existence of salt at Khewra, in the [[Jhelum District]] has been known about since the army of Alexander the Great crossed the Jhelum and Mianwali region during his Indian campaign in 326 BC and has been extracted here since at least the 13th Centuary AD. The British took control of the mines in 1849 and soon built a metalled road to the mines. In 1872 a Dr H Warth began the room and pillar method of extraction of the salt. By 1881 the mines, (also known as the 'Mayo Mines', in honour of Lord Mayo, who visited the mines as Viceroy of India), were operated by the 'Northern India Salt Revenue Department' <ref name =PP17>“Industrial Railways and Locomotives of India and South Asia” compiled by Simon Darvill. Published by ‘The Industrial Railway Society’ 2013. ISBN 978 1 901556 82-7. Available at http://irsshop.co.uk/India. Reference: Entry PP17 page ....</ref> <ref>[https://en.wikipedia.org/wiki/Khewra_Salt_Mine Wikipedia "Khewra Salt Mine"]; Retrieved 25 Nov 2017</ref>.

==Railways==