The former Environment Minister's remarks came a day after Vijayan backed state Electricity Minister Kadakampally Surdendran who said that the new CPI(M)-led LDF government would implement the project proposed across Chalakkudy river in consultation with environmentalists and their organisations.
"Athirappilly project is a perfect recipe for ecological disaster which Prime Minister Narendra Modi and Chief Minister Pinarayi Vijayan will wreak on Kerala and the country," Ramesh told PTI.
Vijayan had also lamented that the project got stuck in a series of legal issues despite getting clearances from various departments.
Ramesh, who had rejected green clearance to the project during his stint as Environment Minister in 2011 in the UPA-II government, said his stand on Athirappally has been "clear, categorical and consistent".
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"It is a stand taken by then Principal Chief Conservator of Forest T M Manoharan, who was the Chairman of the Kerala State Electricity Board under three Chief Ministers. He had opposed the project citing the harm it could cause to the environment and ecology of the area," Ramesh said.
Meanwhile, the CPI, a key partner in the LDF government, has come out openly against the CPI(M) leaders' move to revive the project.
Opposing the project, CPI leader and Agriculture Minister V S Sunil Kumar said there was no change in his party's stand on the issue.
The project planned at the water resource bed of Chalakudy river was revived during the 2006-2011 LDF rule in the state.