Narakakkanam Weir

Narakakkanam Weir (Malayalam:നാരകക്കാനം തടയണ) is a diversion dam constructed across Narakakkanam River in Mariyapuram panchayath of Thankamani Village in Idukki district in Kerala, India. Narakakkanam weir is an augmentation weir for the Idukki Hydro Electric Project. Narakakkanam, Azhutha, Vazhikkadavu, Vadakkepuzha and Kuttiar diversion schemes were later added to augment the Idukki reservoir. The height of the dam is 11.50 m from the deepest foundation and length is 45.20 m.

Specifications

 * Location	Latitude : 9⁰ 50′ N
 * Longitude: 77⁰ 00′ E
 * Panchayath : Mariyapuram
 * Village: Thankamani
 * District : Idukki
 * River Basin : Periyar
 * River : Narakakkanam river
 * Release from Dam to river : Periyar
 * Taluk through which release flows : Thodupuzha
 * Year of completion :
 * Name of Project : Idukki HEP
 * Purpose of Project : Hydro Power
 * Installed capacity of the Project	780 MW


 * Type of Dam : Concrete- Gravity
 * Classification ; Weir
 * Maximum Water Level (MWL) : EL 770.00 m
 * Full Reservoir Level ( FRL): EL 768.00 m
 * Storage at FRL	0.00396 Mm3
 * Height from deepest foundation : 11.50 m
 * Length : 45.20 m
 * Spillway : Ungated – Overflow section
 * Crest Level : EL 768.00 m
 * River Outlet : Not provided
 * Officers in charge & phone No.	Assistant Executive Engineer, Idukki Augmentation Scheme, Moolamattom. Phone-9496009429