Indian Railways engineers have developed a new tunnelling method in the most challenging part of the 111-km-long Katra-Banihal section of the Kashmir rail link project.

Tunnel-1 is a 3.2-km-long single tube tunnel, located at the foot of the Trikuta Hills in the Katra-Reasi section of the  project.

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https://telanganatoday.com/engineers-develop-new-tunnelling-method-for-kashmir-rail-link-project