Harnaut–Mokama section

{{Infobox rail line

| name        = Harnaut–Mokama section
हरनौत-मोकामा खण्ड
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| logo        = 
| logo_width  = 100 px
| image       = Harnaut railway station board.jpg
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| caption     = Harnaut railway station board
| type        = 
| system      = 
| status      = Operational
| locale      = Bihar
| start       = Harnaut
| end         = Mokama
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| routes      =
| daily_ridership =
| open        = 2016
| close       =
| owner = Indian Railways
| operator    = East Central Railway
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| depot       =
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| linelength  = 52 km (32 mi)
| tracklength =
| tracks      = 1/ 2
| gauge       = 1,676 mm (5 ft 6 in) [[5 ft 6 in (1,676 mm) broad gauge|broad gauge]]  
| old_gauge   =
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| speed       = 80–110 km/h (50–68 mph)
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| map         =  

km to Rajgir and Gaya 0 Harnaut Carriage Repair Workshop Harnaut Howrah–Delhi main line to Patna 8 Karnauti (halt) 12 Jai prakash mahuli (halt) 15 Atlmal gola 23 Barh Barh Super Thermal Power Station 33 Punarkh 42 Mor 50 Mokama Mokama–Barauni section to Asansol and Howrah

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}} The Harnaut–Mokama loop also known as Coal Belt Loop which connects Harnaut and Mokama Junction. 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 53 kilometres (33 mi) stretch was assigned a separate identity.