The objective of building the Ghataprabha reservoir across Ghataprabha River, was storing water for irrigational purpose. The first stage started in 1897 and comprised a 71 km long left bank canal from the Dupdal weir across Ghataprabha rive near Dupdhal in Gokak canal for providing irrigation to an extent of 0.425 lakh hectares. The second stage of the reservoir project comprised left bank canal from the Dupdal weir from Km 72 to its full length extension of 109 Km across Ghataprabha river, near Hidkal, upto a height of 650.14 metre.

The Ghataprabha reservoir has storage of about 659 Mcum for providing irrigation to a total extent of 1.396 lakh hectares of land, inclusive of the area under stage I. The third stage of the project includes raising the FRL of Hidkal dam to its final level of RL 662.94 Mtr (RL 2175.00 feet). Thus creating gross storage of 1448 Mcum, which is channelised into 202 Km long Right Bank Canal and 86 Km long Chickkodi Branch Canal in order to irrigate 191386 hectares of land bringing the total area under the project to 3.31 lakh hectares of land. The Ghataprabha reservoir is a composite dam, 53.34 meters high and 10183 long.

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