<Tr> <Th> Turbines </Th> <Td> 1 x 110 MW Francis turbine, 7 x 100.8 MW reversible Francis turbines </Td> </Tr> <Tr> <Th> Installed capacity </Th> <Td> 816 MW (1,094,000 hp) </Td> </Tr> <P> Nagarjuna Sagar Dam, one of the world's largest and tallest Masonry dam built across the Krishna river at Nagarjuna Sagar which is in Nalgonda District, Telangana State . Construction was between 1955 and 1967, the dam created a water reservoir with gross storage capacity of 11.472 billion cubic metres (405.1 × 10 ^ cu ft). The dam is 590 feet (180 m) tall from its deepest foundation and 0.99 miles (1.6 km) long with 26 flood gates which are 42 feet (13 m) wide and 45 feet (14 m) tall . </P> <P> Nagarjuna Sagar was the earliest in the series of large infrastructure projects termed as "modern temples" initiated for achieving the Green Revolution in India . It is also one of the earliest multi-purpose irrigation and hydro - electric projects in India . The dam provides irrigation water to the Nalgonda, Suryapet, Krishna, Khammam, West Godavari, Guntur and Prakasam districts along with hydro electricity generation . Nagarjuna Sagar dam is designed and constructed to use all the water impounded in its reservoir of 312 TMC gross storage capacity which is the second biggest water reservoir in India . </P>

How many gates are there in nagarjuna sagar dam