A news item about the impending conversion of the (Nagpur) Itwari-Nagbhir narrow gauge section from November 2019:
This is the last of the vast network of narrow gauge lines which used to cover a large part of the less-developed areas of Maharashtra and Madhya Pradesh.
Here is an earlier post describing its operations in late 2015:
https://abn397.wordpress.com/2015/12/14/the-satpura-railway-still-exists/