The Kollam–Sengottai
metre-gauge line was conceived and implemented by Maharajah
Uthram Thirunal of Travancore. It was built jointly by
South Indian Railway Company,
Travancore State and the
Madras Presidency. After a survey in 1888, work started in 1900 and was completed by 1902. The first goods train travelled on this route in 1902 while the first passenger train began its run in 1904. Metre-gauge services were inaugurated on 1July 1904 with the first passenger train flagged off from Kollam by Maharajah
Moolam Thirunal of Travancore with a 21-gun salute. The railway line was constructed by the
British in the foothills of the
Western Ghats to transport forest products,
spices and
cashews from Kollam to Chennai, their southern headquarters.
Timeline • 1888 Survey for Quilon-Madras rail started. • 1899 - Survey for Quilon–Madras rail link completed • 1900 - Works for Kollam–Sengottai metre-gauge railway line started to connect the city of Quilon with
Madras • 1902 - Kollam–Sengottai Railway line works completed • 1904 - On 1 June, His Highness
Moolam Thirunal Rama Varma of
Travancore flagged off the first passenger train service on the Kollam–Sengottai railway line at
Kollam railway station • 1998 - Gauge conversion of Kollam–Sengottai Railway line officially started • 2007 - On 1 May, rail services on Kollam–Punalur section withdrawn • 2010 - On 10 May, Kollam–Punalur broad-gauge section thrown open for services • 2018 - On 31 March, the entire Kollam–Sengottai line thrown open for passenger train services. The first passenger train on the stretch was Tambaram–Kollam–Tambaram special train service (06027/28) which completed the service by earning Rs 3.15 lakh as passenger ticket collection from its 879 passengers against a capacity of 712. • 2022 - Electrification of Kollam - Punalur stretch completed. • 2023 - Electrification of Punalur - Edamon stretch and Sengottai - Bhagavathipuram stretch completed. • 2024 - On 31 March 2024 the pending electrification works between Edamon and Bhagavatipuram was completed. Thus the entire Kollam–Sengottai line is electrified. However the
traction substation at
Punalur was not yet ready. On 2024 July 28, the
Palaruvi Express from
Tirunelveli to
Palakkad was the first electric train that passed through the route. The electric supply was obtained from
Sengottai and
Perinad traction substations. Currently all trains Including
Ernakulam–Velankanni Express are running on electric traction. More trains like MEMU are expected to run through the route since electrification is completed. • 2025 - On 18 October 2025 electric supply from
KSEB reached newly constructed Punalur traction substation after delay of 2.5 years from their end. The Kollam - Chennai Egmore mail was the first train to run using the electric supply from Punalur TSS. The electric supply from Punalur TSS would energise the
Kilikollur -
Thenmala 70 km section. Thus the entire 761 km Kollam - Chennai route is electrified in all respects finally. This was a milestone in the 121 year old history of the route and would ensure seamless transportation experience along the ghat section. ==About the route==