Anayirangal Dam is an earthen dam built on the Panniyar river in Chinnakanal and Santhanpara panchayats, 22 km (14 mi) from Munnar in Idukki district of Kerala, India. The dam is surrounded on one side by forest and on the other by Tata Tea Plantation. The dam is located near the Munnar – Kumily road. The water flowing from the dam reaches Kuthungal and Ponmudi dams through the Panniyar river. Power is generated at Kuthungal and Panniyar powerhouses. The dam stores water from small streams flowing from Bealram and rainwater flowing from the hills on the Tamil Nadu border. The reservoir usually fills up in June and July. The height of the dam is 34.14 metres (112.0 ft) and Length is 326.13 metres (1,070.0 ft).
The project is situated in Mudirapuzha basin, a sub basin of Periyar River. The reservoir is created by constructing a dam at Anayirankal. Construction was led by E.U.Philipose, Superintending Engineer, Kerala State Electricity Board. The dam has ungated spill way system. The water stored in the reservoir is released to the river downstream through an outlet. This water is diverted by an overflow barrage at Kuthungal to Kuthungal Power House. After generation of power the water is released to Ponmudi reservoir at the downstream. The water from the Ponmudi reservoir is diverted to Panniyar Power station located on the left bank of Mudirapuzha and released back to Mudirapuzha river and flows downstream to kallarkutty reservoir. From there the river flows through taluks of Udumpanchola, Devikulam, Kothamangalam, Muvattupuzha, Kunnathunadu, Aluva, Kodungalloor, Paravur.
