Nagarjuna Sagar Dam is a masonry dam built across Krishna river in Nagarjuna Sagar, Andhra Pradesh, India. It is one of Asia's largest masonry dams, at a height of 124m, and creates a reservoir holding up to 11,472 million cubic metres. The dam is also known for being one of the earliest irrigation and hydro-electric projects in India and boasts of one of the largest networks of canal systems in the world. The dam provides irrigation water to the Nalgonda District, Prakasam District, Khammam District, and Guntur District. A lake emerges from just behind the dam, which is one of the largest artificial lakes in the nation.

The project benefited farmers in the districts of Guntur, Prakasam, Krishna, Nalgonda and Khammam. The right canal is 203km long and irrigates 1.113 million acres (4,500 km²) of land. The left canal is 295 km long and irrigates 1.03 million acres (4,200 km²) of land.

Catchment Area : 215000 km² (83012 sq mi)

Spillway of dam : 471m

Non-over flow dam : 979m

Length of Masonry dam : 1450m

Maximum height : 125 m

Total Length of Earth dam : 3414 m

Maximum height of Earth dam : 26 m

The company was awarded a GOLD MEDAL on 4th August, 1969 by the then Prime Minister of India Mr. Indira Gandhi for achieving record progress of masonry construction on any single day.