At 51.97 kilometres long, it is the sixth longest water tunnel in the world.

[2] In 1965, the first phase of construction of a water supply line from the Želivka began far away from Prague.

Soon, a 51 kilometres long tunnel was being cut to bring clean water from the treatment plant in Nesměřice to Jesenice.

Meanwhile, there already were two lines leading from the water tank in Jesenice, one going north-west to Prague-Libuš, Novodvorská street and further, the second going to Prague-Chodov, Hostivař and further.

On 2 April 1967, dredgers and bulldozers started digging trenches for three parallel lines in Chodov.