The Harnaut–Mokama loop also known as Coal Belt Loop which connects railway station and . Originally a part of the Howrah–Delhi main line & Bakhtiyarpur–Tilaiya line, it was opened to traffic in 2016.
The line carries coal from Jharkhand state to most important NTPC Barh. With the construction of a shorter railway line for a part of the route, the stretch was assigned a separate identity.
Harnaut is also a legislative assembly constituency.
Branch line Construction of dual electric line between Karnauti Halt and Jaiprakash Mahuli Halt extent up to .
Railway workshop & Industry Two major Industries along with this line Rail Coach Factory, Harnaut & NTPC Barh
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