Thodupuzha: The water level in the Mullaperiyar dam touched 139.5 ft on Thursday following the incessant rains for the past couple of days.
The spurt in the water level followed heavy rain and Tamil Nadu reducing offtake of water from the dam after the reservoirs downstream reached full capacity.
Last week, Kerala had requested the Supreme Court-appointed high-level supervisory panel and TN to maintain the water level at 136 ft as one of the 13 spillway shutters of the dam was dysfunctional.
On May 7 this year, he Supreme Court had held that the 120-year-old dam is safe and allowed the Tamil Nadu government to raise the water level to 142 feet and ultimately to 152 feet after completing strengthening measures on the dam.
A five-judge Constitution bench had struck down a law promulgated by Kerala, which had been fighting a decade long battle with Tamil Nadu, declaring the dam as endangered and fixing the water level at 136 feet.
It had also pulled up the Kerala government for enacting a law which overruled its verdict of 2006 by which it had declared the dam safe and allowed the Tamil Nadu authorities to raise the water level.