KOCHI: The KSEB opened four spillway shutters of the Edamalayar dam at 11 am on Tuesday as the water level in the dam crossed the upper rule curve level. Though the district collector gave permission to release 350 cumecs of water from 6 am to 6 pm, the dam is releasing only 238.68 cumecs of water. The water from Edamalayar flows through Bhoothathankettu dam where all the 15 shutters are kept open. Bhoothathankettu dam is releasing 1,700 cumecs of water into Periyar.