Grant Trunk third line project gets further boost Updated: Updated: Works between Kolnur and Potkapalli commissioned Share Article AAA Electrification and other works in progress on the third line between Kolnur and Potkapalli of South Central Railway. Works between Kolnur and Potkapalli commissioned The significant third line project in the ‘Grand Trunk’ route of Telangana region viz., Kazipet – Balharshah project has been given further boost with the commissioning of works between Kolnur and Potkapalli for a distance of 7.75 km along with electrification and yard remodelling on Monday. The section connecting northern with southern region of the country will provide continuous third-line facility for train operations along a stretch of 64 km between Potkapalli – Mandamarri, including the third line on Godavari bridge between Manchiryal and Peddampet, informed SCR General Manager Gajanan Mallya.