Santahar-Kaunia line is a meter gauge line under Bangladesh Railway. This line is built by Bhramhaputra - Sultanpur railway company between 1899-1905. 
| Santahar–Kaunia line | 
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| Status | Operational | 
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| Owner | Bangladesh Railway | 
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| Locale | Bangladesh | 
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| Termini |  | 
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| Stations | 29 | 
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| Train number(s) | 20 services daily | 
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| Opened | 1899-1905 | 
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| Line length | 167 kilometres (104 mi) | 
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| Track length | 167 kilometres (104 mi) | 
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| Number of tracks | 1; 2 in some places | 
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| Track gauge | meter gauge (1,000 mm (3 ft 3+3⁄8 in) | 
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| Electrification | None | 
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| Operating speed | 50 kilometres per hour (31 mph) (for 1,000 mm (3 ft 3+3⁄8 in) gauge) & 75 kilometres per hour (47 mph) (for 1,676 mm (5 ft 6 in)  gauge) | 
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| Highest elevation | varies | 
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