The Nainpur-Mandla Fort Railway was a 2ft 6in/762mm narrow gauge(NG) line, opened in 1909 and worked by Bengal-Nagpur Railway(BNR) as part of the Satpura Railway Narrow Gauge Lines
The Mandla Branch of EBR , 26 miles (42km), from Nainpur to Mandla (described as Garha Mandle), more usually as Mandla Fort), opened 1909 .
The Nainpur-Mandla Fort section closed in 2015 for conversion to broad gauge(BG) 
See Satpura Railway
and Bengal-Nagpur Railway