UdaiSagar Lake is another striking lake that falls under the category of five lakes of Udaipur.
Udaisagar Lake is located at a distance of about 13 kms in the east of Udaipur. The construction of this lake was started in 1559 by MaharanaUdai Singh and got completed in 1565. Maharana Udai Singh constructed this dam on Berach River, to ensure adequate supply of water in his kingdom. Dam at Udaisagar Lake drains about 479 sq km of the country and covers an area of 10.5 sq kms. It has a storage capacity of 23.4 milli cubic meter. To manage the overflowing lake during rainy season, one channel has been made connecting to Berach River. Today, the water of this lake is used in the zinc smelter close to Debari. The lake usually has plenty of water with the exception of lean years.
In 1573, Maharana Pratap Singh was invited by Kunwar Man Singh on the banks of Udai Sagar Lake to talk about the surrendering terms and conditions to Akbar (Mughal Emperor). The invitation was declined by Pratap Singh and he even insulted Man Singh. This incident led to the Battle of Haldighati in 1576. Later, Maharana Raj Singh conquered the army of Emperor Aurangzeb near the embankment of Udai Sagar Lake. People visit this lake to enjoy the serene waters of this lake.
Three causeways, one from Pichola Lake, the other from Madar Lake and the third one from Badi Lake lead to the Fateh Sagar Lake. There are three inlet channels, which feed the lake and an overflow section on the eastern side in the Masonry dam of 800 m length. Monsoon rains are the main source of all water to the lake. Initially constructed as an irrigation scheme, it is now the second major source of drinking water to the city of Udaipur and the irrigation supplies have been discontinued. A canal from the Rang Sagar Lake connects to the Fateh Sagar Lake. A gate controlled canal further connects Fateh Sagar Lake with Lake Pichhola.