Conversation so far:
what is the biggest thermal power plant in india
The Vindhyachal Thermal Power Station is currently the biggest thermal power plant in India.
where is the vindhyachal thermal power station located
The Vindhyachal Thermal Power Station is located in Singrauli district in the Indian state of Madhya Pradesh
what is the vindhyachal thermal power station's capacity
The Vindhyachal Thermal Power Station has an installed capacity of 4,760 MW.

Question: where is the coal sourced from
Self-contained rewrite: where is the coal for the vindhyachal thermal power station sourced from