The '''Delhi-Umballa-Kalka Railway'''(DKR) Company was formed in 1889. The broad gauge([[Rail_gauge#Broad_Gauge|BG]]) line ran north from [[Delhi]] via [[Umballa
]]+(Ambala) to Kalka in the Himalayan foothills where it joined the [[Kalka-Simla Railway]] . <ref>[ http://discovery.nationalarchives.gov.uk/details/rd/d2cc94a1-245a-4594-b7e3-ba22bf6a8cf7 National Archives "Records of the Delhi-Umballa-Kalka Railway Company" IOR/L/AG/46/9] ; Retrieved 10 Dec 2015</ ref><ref>[https://archive.org/stream/BombayBarodaAndCentralIndiaRailwaySystem/Bombay_Baroda_And_Central_India_Railway_System#page/n68/mode/ 2up " Administration Report on the Railways in India – corrected up to 31st March 1918"; Superintendent of Government Printing, Calcutta; page 60]; Retrieved 2 Feb 2016</ref> The line was worked by the [[East Indian Railway]](EIR) and taken over by the Government of India([[Government of India |GoI]]) in 1925.
The DKR Company signed a contact in 1898 with GoI for the construction and working of a 2ft/610mm narrow gauge( [[Rail_gauge#Narrow_Gauge|NG]]) line from [[ Kalka]] to [ [Simla]]. The line was opened to traffic in 1903 and as a result of high capital cost and high maintenance cost the Delhi-Umballa-Kalka Railway Company was by 1904 in severe financial crisis. The Kalka-Simla Railway was purchased by GoI in January 1906. The line was later converted to 2ft 6in/ 762mm narrow gauge.
'''Umballa''' ''is used in this text as it was the name of the Railway Company.''
'''Amballa''' ''and'' '''Ambala''' ''are also recorded in different documents as various spellings .
'' ''None of these three place names appear in the [[Gazetteers#Imperial_Gazetteer_of_India|The Imperial Gazetteer of India]] 1908 which is normally taken to be the definitive source''
An on-line search of the IOR records relating to this railway
<ref>[http://searcharchives.bl.uk/primo_library/libweb/action/search.do?vid=IAMS_VU2 British Library “British Library Archives and Manuscripts Catalogue” - Search]; Retrieved 20 Jan 2016</ref> gives 23 references. The most important being:-
*'''L/F/8/13/945/1 ''' “Delhi Umballa Kalka Railway Company Limited, Contract for the construction of the Delhi Umballa Kalka Railway; 1889”
*'''L/AG/46/9''' “Records of the Delhi-Umballa-Kalka Railway Company; 1898-1907”
*'''L/AG/46/29 ''' “Records of the India Office relating to the Delhi-Umballa-Kalka Railway; 1889-1926”
*[http://en.wikipedia.org/wiki/Delhi%E2%80%93Kalka_line Delhi-Kalka Line"] Wikipedia
== References ==