Kosani Saddle dam is an earthen dam constructed on Karamanthodu in

Thariyode Thariyode (also spelled ''Thariode'') is a village near Padinjarathara in Wayanad district in the state of Kerala, India. Important Landmarks * Banasura Sagar Dam – The Largest Earth Dam in India. * Karalad Lake * GLPS Thariode * GHSS Tha ...

panchayath of

Wayanad district Wayanad () is a district in the north-east of the Indian state of Kerala, with its administrative headquarters at the municipality of Kalpetta. It is the only plateau in Kerala. The Wayanad Plateau forms a continuation of the Mysore Plateau, ...

Kerala Kerala ( , ) is a States and union territories of India, state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile ...

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

. It is a saddle dam of Banasura sagar reservoir built as a part of Kuttiayadi Augmentatuon Scheme. The dam was built and is maintained by Kerala State Electricity Board. The Kuttiyadi Augmentation Scheme comprises a main dam known as Banasurasagar Dam, an earth fill dam and a concrete gravity spillway dam and six saddle dams namely, a) Kosani ( Earth fill dam) high b) Near Kottagiri ( Earth fill dam) high c) Kottagiri ( Earth fill dam) high d)

Kuttiyadi Kuttiady is a Major town situated in Kozhikode district of Kerala, India. It is located from Vadakara, from Kozhikode. Kuttiady is situated in the slopes of the Western Ghats. The four-sided junction of Kuttiady helps travelers to reach dif ...

( Concrete dam) high e) Nayamoola ( Earth fill dam) high f) Manjoora ( Earth fill dam) high. All the dams, except Kuttiady saddle, are earth fill dams. The Kuttiyadi saddle dam is a concrete dam. The spillway is located adjacent to the main dam at the right bank of the original river course. The water spread area at FRL / MWL is 12.77 km^2. The catchment area of Banasurasagar Dam is 61.44 km^2..

Specification

Reservoir

The Gross Storage of Kuttiyadi Augmentation (Banasura sagar) Reservoir is 209 Mm3 and live storage 185 Mm3. The water stored in the reservoir is diverted to the reservoir of Kuttiyadi Hydro Electric Project through an interconnecting tunnel. The sill level of diversion tunnel at inlet is 750.83 m. The size and shape of tunnel is varying. It is varying from 2.35 m dia. circular lined tunnel for a length of 890m &2.85 m D-shaped unlined tunnel for a length of 3873 m. Maximum diversion is11.6 m3/s. The diverted water is used for power generation from Kuttiyadi Power Station. FRL of the reservoir is 775.60 m. Top level of dam is 778.50 m. There are four radial gates, each of size 10.97 m x 9.20 m. Crest level of spillway is 767.00 m. Spillway capacity is 1664 m3/s. One lower level outlet is provided in the spillway structure at750.75 m of size 1.10 m X 1.75 m to release irrigation requirement.

References

{{coord missing, Kerala Dams completed in 2005 Dams in Wayanad district