Vazhikadavu Weir

Vazhikadavu Weir (Malayalam:വഴിക്കടവ് തടയണ) is a diversion dam of concrete gravity type constructed across Meenachil River at Teekoy Village in Kottayam District in Kerala, India. The Vazhikkadavu weir is constructed as an augmentation scheme to Idukki HEP. The dam has a height of 10.20 metres (33.5 ft) from the deepest foundation and a length of 58 metres (190 ft).^[1]^[2]

Narakakkanam, Azhutha, Vazhikkadavu, Vadakkepuzha and Kuttiar diversion schemes were later added to augment the Idukki reservoir. The Vazhikadavu diversion scheme envisages diversion of the water from 6 km² catchment of Vazhikkadavu Ar (tributary of Meenachil Ar.) to Idukki reservoir by constructing an unlined tunnel of 2,579.25 metres (8,462.1 ft) and a weir which is 58 m long for regulation and additional power generation of 18.2 Million units at Idukki Power station. The weir site and tunnel inlet are located in Meenachil taluk of Kottayam District and tunnel exit site is located in Peermade taluk of Idukki district. The diversion weir site is near Vagamon – 2 km from Vagamon town on Vagomon Erattupetta road.^[3] The construction started in 1989 but was completed in 2002.^[4]

Specifications

Latitude : 9⁰ 41′ N
Longitude: 76⁰ 54′ E
Panchayath : Teekoy
Village : Teekoy
District : Kottayam
River Basin : Periyar
River : Meenachil river
Release from Dam to river : Meenachil river
Taluk through which release flows : Meenachil
Year of completion : 2002
Name of Project:Idukki HEP
Type of Project : Hydro Power
Type of Dam : Concrete- Gravity
Classification : Weir
Maximum Water Level (MWL) : EL 939.00
Full Reservoir Level ( FRL) : EL 936.70 m
Storage at FRL : 0.18 Mm3
Height from deepest foundation : 10.20 m
Length : 58.00 m
Spillway : Ungated – Overflow section
Crest Level : EL 936.70 m
River Outlet : 1 No. Circular type, 0.75 m dia

References

^ "Fact file on dams owned by Kerala State Electricity Board". www.expert-eyes.org. Retrieved 2021-07-29.
^ "Dams_in_Kerala - India WRIS Wiki".
^ "Diversion Structures in Idukki district – KSEB Limited Dam Safety Organisation". Retrieved 2021-07-29.
^ Pillai, N. Vijayamohanan; Kannan, K. P. (July–December 2002). "Time and Cost Overruns of the Power Projects in Kerala1" (PDF). Journal of Social and Economic Development.

[1] "Fact file on dams owned by Kerala State Electricity Board". www.expert-eyes.org. Retrieved 2021-07-29.

[2] "Dams_in_Kerala - India WRIS Wiki".

[3] "Diversion Structures in Idukki district – KSEB Limited Dam Safety Organisation". Retrieved 2021-07-29.

[4] Pillai, N. Vijayamohanan; Kannan, K. P. (July–December 2002). "Time and Cost Overruns of the Power Projects in Kerala1" (PDF). Journal of Social and Economic Development.

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