Mahanadi Coalfields (MCL), the Coal India unit which supplies NALCO, said it has sufficient coal and has asked NALCO to prioritize moving coal via conveyor belts and trucks instead of using trains. It said it was prioritising the sending of coal via rail to power stations.
The NALCO official said it was not possible to increase transport by road due to "logistical challenges".
The NALCO Officers' Association, a welfare association for executives of the company, is taking legal action over the coal supply shortfalls, alleging poor planning by the Indian government and the various state bodies involved.
"The lopsided prioritization of the union government and the lackadaisical attitude of the railways has triggered the present crisis," said Subir Palit, a lawyer representing the NALCO Officers' Association, which has taken the coal ministry, MCL and a unit of the Indian Railways to court over the supply shortfalls.