10 longest tunnels in India

1. Karbude Tunnel , 6.506 km long , Maharastra by Konkan Railway.
2. Nathuwadi Tunnel , 4.389 km, Maharastra by Konkan Railway
3. Tike Tunnel , 4.077 km Maharastra by Konkan Railway
4. Berdewadi Tunnel 4.000 km ,Maharastra by Konkan Railway
5. Savarde Tunnel , 3.429 km,  Maharastra by Konkan Railway
6. Barcem Tunnel, 3.343 km ,Goa by Konkan Railway
7. Karwar Tunnel , 2.950 km, Karnataka by Konkan Railway
8. Chowk  tunnel ,2.830 km, Maharastra by central Railway
9. Parchuri Tunnel, 2.628 km ,  Maharastra by Konkan Railway
10. Khowai tunnel , 2.472 km , Tripura by North East Frontier Railway.

At Qazigund end of stretch of USBRL Project , kashmir Railway, the longest tunnel on Indian Railways is being constructed ( T-80, Pir Panjal Tunnel). This tunnel is 10.96 km long and will pierce through the Pir Panjal range below the snow line.