Tughlaq's primary attention to infrastructure, particularly of iron supply to the city, was also well thought out. A structure (weir or tank) with seven sluices (Hindi:Satpula, meaning "seven bridges") was built on a stream that flowed through the city. This structure called the Satpula is still existing (though non–functional) near Khirki village on the boundary walls of Jahanpanah. Similar structures had also been built at Tughlaqabad and Delhi in Hauz Khas Complex, thus covering the water supply needs of entire population of Jahanpanah.
