Changes

*18541853-54, the railway bridge over the Thane creek was opened and on 1 May 1854 the section continuation of the line from [[Thane]] to [[Callian]] (later named [[Kalyan]]) was openedthe first contact awarded to [[Messrs. Wythes and Jackson, Construction Contractors|Messrs. Wythes and Jackson]] <ref name=GGW&J>[http://www.gracesguide.co.uk/Wythes_and_Jackson Grace's Guide "Wythes and Jackson"]; Retrieved 6 Jul 2016</ref>. This section of the construction line involved a railway bridge over the Thane creek and the two-line [[Tannah Viaduct]] over the estuary and two tunnels. The This viaduct was the first substantial railway bridge to be constructed in India and connected Bombay Island to the mainlandand opened and on 1 May 1854.

'''North-East Line''' - [[Bombay]] via [[Callian]] and [[Thal Ghat Railway Construction|Thal Ghat]] to [[JubbleporeJubbulpore]] - 615 miles(990km)

*18611857-61, [[Callian]] (later named [[Kalyan]]) to [[Kasara]] section openedconstructed, a further 42 miles(68 km)<ref>[http://www.gracesguide.co.uk/Great_Indian_Peninsula_Railway Graces Guide "Great Indian Peninsula Railway - 1865"]; Retrieved 3 Jul 2016</ref> rising to an altitude of 948 feet(289m) above sea level at [[Kasara]] at the approach to the [[Thal Ghat Railway Construction|Thal Ghat]]. Opened in 1861.*1857-65Aug, [[Messrs. Wythes and Jackson, Construction Contractors|Messrs. The Wythes and Jackson]] were awarded the contract for the '''[[Thal Ghat Railway Construction]]''' *1857-65. The [[Thal Ghat Railway Construction|Thal Ghat Railway]] was a major project to take the GIPR mainline across the Western Ghats towards Jubblepores[[Jubbulpore]]. The [[Kasara]] to [[Igatpuri]] section was 9.5 miles(15km) and within that distance the line had to rise to 1,918 feet(585m). The construction required 13 tunnels, 6 viaducts, including the [[Ehagaon Viaduct]]; cuttings; embankments; 15 bridges and culverts and the Reversing Station<ref>[http://books.google.com/books?id=a5MEAAAAMAAJ&printsec=frontcover&dq=bombay+mechanics&hl=en&ei=8FUcTMGmHqC0nAeWxImdDg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCwQ6AEwAA#v=onepage&q&f=false Google Books "Paper on the (GIPR) Thul Ghaut Railway" incline delivered to the Bombay Mechancs Institution in December 1860 by the GIPR Chief Engineer [[James John Berkeley]], page 20.] Retrieved on 2 Jul 2016</ref>.*c.1859-65, [[Messrs. Wythes and Jackson, Construction Contractors|Messrs. Wythes and Jackson]] were awarded a further contact to construct a further section of the GIPR north-eastern line from [[Igatpuri]] at the end of the Thal Ghat, this was opened in stages reaching [[Chalisgaon]] in 1861, [[Jalgaon]] in 1863 and [[Bhusawal]] in 1865, a total of 191.24 miles(307km)<ref>[https://archive.org/stream/BombayBarodaAndCentralIndiaRailwaySystem/Bombay_Baroda_And_Central_India_Railway_System#page/n73/mode/2up " Administration Report on the Railways in India – corrected up to 31st March 1918"; Superintendent of Government Printing, Calcutta; pages 64-68, pdf pages 73-77]; Retrieved 6 Jun 2016</ref>.