This branch again links with the Manimala River at Chennankary in a short, but broad connection known as Munnattumukham.

It has its origin on the [Muthavara Hills] (1156 feet above main sea level) on the Western Ghats in Peermedu in Idukki district of Kerala, India.

[1] Yendayar, Koottickal, Mundakayam, Erumeli, Manimala, Kottangal, Kulathurmoozy, Vaipur, Mallappally, Keezhvaipur, Thuruthicad, Komalam/Kuranjoor Kadavu, Kallooppara, Vallamkulam, Kattode & Kuttoor (outskirts of Thiruvalla city), Pulikeezh, Nedumpuram, Neerattupuram, Amichakary, Muttar, Kidangara, Pulincunnoo, Veliyanadu, Ramankary, Mankompu lie on the banks of Manimala River.

This huge lake has just two outlets, one at Thottappaly Spillway and second at Thannermukkom Bund, both man made barriers, built to prevent incoming seawater during high tides, which otherwise would render the low lying paddyfields (average 2.5 meters below sea level) uncultivable.

[citation needed] Manimala River has been an important water way of Central Travancore.