The Proposal: The proposed link envisages tapping of 2,252 Mcum of water from Cauvey at the existing Kattalai bed regulator through a 255.60 km. long gravity canal for irrigating additional area of 3.38 lakh hectares, utilizing 1,952 Mcum of water in Tamil Nadu.   This link canal will also provide 185 Mcum for domestic and industrial water supply to enroute area, besides the transmission losses of 115 Mcum of water.

Engineering Aspect: The existing Kattalai head regulator is located on river Cauvery downstream of Mettur dam.  The crest level is 96.80 m.    This regulator is proposed to be modified as a barrage to serve as the headwork structure for this link canal.  Also, a weir across Gundar river is proposed for picking up of water for irrigation.  The total length of the link canal is 255.60 km.  The canal takes off at Right Bank of Cauvery near Kattalai, at the head regulator, with FSL 100.75 m and outfalls into Gundar River with FSL at 75.688 m.  The canal is proposed to be operated through out the year to meet the domestic and industrial water supply as well as the irrigation needs.  The canal is proposed to be lined through out its length.

Environmental Issue: In this link also no major environmental issues are involved.  No water logging is expected since the canal runs through water short areas.  Rather, it will be beneficial in recharging the ground water in the region. 

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