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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 [[Ambala|Umballa]]+(Ambala) +]] to [[Kalka ]] in the Himalayan foothills where it joined there was a connection to the DKR owned [[Kalka-Simla Railway]]. <ref>narrow gauge([[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/46/9Rail_gauge#Narrow_Gauge|NG]]; Retrieved 10 Dec 2015) line that opened in 1903 <ref name=name/ref><ref>[https://ia801009.us.archive.org/8/itemsstream/BombayBarodaAndCentralIndiaRailwaySystem/Bombay_Baroda_And_Central_India_Railway_System.pdf #page/n68/mode/1up " Administration Report on the Railways in India – corrected up to 31st March 1918"; Superintendent of Government Printing, Calcutta; page 6960]; Retrieved 17 24 Dec 20152017</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 Construction of the construction and working of a 2ft/610mm narrow gauge161 mile([[Rail_gauge#Narrow_Gauge|NG]]243km) stated in May 1889 and opened in March 1891. The BG line from was initially worked by the [[KalkaEast Indian Railway]] to (EIR) <ref name=Admin>[[Simla]]https://archive. The line was opened to traffic in 1903 and as a result of high capital cost and high maintenance cost org/stream/BombayBarodaAndCentralIndiaRailwaySystem/Bombay_Baroda_And_Central_India_Railway_System#page/n68/mode/1up " Administration Report on the Delhi-Umballa-Kalka Railway Company was by 1904 Railways in severe financial crisis. The Kalka-Simla Railway was purchased by GoI in January 1906. The line was later converted India – corrected up to 2ft 6in31st March 1918"; Superintendent of Government Printing, Calcutta; page 60]; Retrieved 14 Jun 2020</762mm narrow gaugeref>.

+NoteTaken over by the [[Government of India ]]([[Government of India |GoI]]) in 1925 <ref name=GovUK>[http: //discovery.nationalarchives.gov.uk/details/rd/d2cc94a1-245a-4594-b7e3-ba22bf6a8cf7 IOR "Records of the Delhi-Umballa-Kalka Railway Company" IOR/L/AG/46/9"]; Retrieved 14 Jun 2020</ref> and the working transferred to the [[North Western Railway]](NWR) on 1 Apr 1926 <ref>[https://ia801605.us.archive.org/30/items/in.ernet.dli.2015.36650/2015.36650.India-Railway-Board-History-Of-Indian-Railways-Constructed-And-In-Progress.pdf US Archive .org pdf download of ‘History Of Indian Railways, constructed and in progress’, 31 March 1937 by ‘The Government of India – Railway Department’ page 151 pdf 190]; Retrieved 14 Jun 2020</ref>.

'''Note'''<br>+ '''Umballa''' ''is used in this text as it was the name of the Railway Company.''<br>+ '''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''

<refname=name>[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:-