Great Indian Peninsula Railway
1845 Company provisionally registered. See 1845 Company Registration
1849 August 1st. Incorporated by an act of the British Parliament with a share capital of 500,000 pounds.
1849 August 17th. Entered into a contract with the East India Company for the construction and operation of an experimental line, from Bombay to or near Callian, with a view to an extension thereof to Malsej Ghaut. ref>Morning Post - Saturday 18 August 1849</ref>
1853 April 16th. At 3:35 pm, the first passenger train left Boree Bunder station in Bombay (for Tannah (Thane). The train took fifty-seven minutes to reach Tannah and covered a distance of 21 miles. Three locomotives named Sultan, Sindh and Sahib pulled the 14 carriages carrying 400 passengers on board.
1854 The railway bridge over Thane creek was completed
1854 May 1st. The section of the line from Tannah to Callian (Kalyan) was opened and its construction involved a two-line viaduct over the estuary and two tunnels.
1856 May 12th The line was extended to Campoolie (Khopoli) via Padusdhurree (Palasdhari)
1858 June 14th. Khandala-Poonah (Pune) section was opened to traffic.
The Padusdhurree-Khandala section involved the difficult crossing of the Bhore Ghat (Bhor Ghat) and it took another five years for completion. During this period, the 21 km gap was covered by palanquin, pony or cart through the village of Campoolie.
1861 January 1st. The Kassarah (Kasara) line was opened
1865 January 1st. The steep Thull Ghat (Thal Ghat) section up to Egutpoora (Igatpuri) was opened and completed the crossing of the Sahyadri.
The south-east main line proceeded over Bhor Ghat to Poonah, Sholapore (Solapur) and Raichore (Raichur), where it joined the Madras Railway.
1868 Route kilometerage was 888 km
1870 Route kilometerage was 2,388.
Beyond Callian, the north-east main line proceeded over the Thull ghat to Bhosawal (Bhusawal) near Nusseerabad. From Bhosawal, there was a bifurcation. One passed through great cotton district of Oomravuttee (present day Amravati) and was extended up to Nagpore (present day Nagpur). The other was extended up to Jubbulpore (present day Jabalpur) to connect with the Allahabad-Jubbulpore branch line of the East Indian Railway which had been opened in June 1867.
1870 March 7th. It became possible to travel directly from Bombay to Calcutta.
1900 June 30th. The assets of the GIPR were purchased by the GoI and merged with those of the Indian Midland Railway into a "new" GIPR, managed by the old company.
1925 July 1st. The company's management was taken over by the Government.
1951 November 5th. Incorporated into the Central Railway.
Sources of Information
-  Wikipedia