Particle.news
The Srisailam Dam is constructed across the Krishna River in Nagarkurnool district, Telangana and Nandyal district, Andhra Pradesh near Srisailam temple town and is the 2nd largest capacity working hydroelectric station in India. The dam was constructed in a deep gorge in the Nallamala Hills in between Kurnool and Nagarkurnool districts, 300 m (980 ft) above sea level. It is 512 m (1,680 ft) long, 145 metres (476 ft) maximum height and has 12 radial crest gates. It has a reservoir of 616 square kilometres (238 sq mi). Project has an estimated live capacity to hold 178.74 Tmcft at its full reservoir level of 885 feet (270 m) MSL. It's gross storage capacity is 6.116 cubic kms (216 tmc ft). The minimum draw down level (MDDL) of the reservoir is at 705 feet (215 m) MSL from its river sluice gates and corresponding dead storage is 3.42 Tmcft. The left bank underground power station houses 6 × 150 megawatts (200,000 hp) reversible Francis-pump turbines for pumped-storage operation (each Turbine can pump 200 cumecs) and the right bank semi under ground power station houses 7 × 110 megawatts (150,000 hp) Francis-turbine generators. Tail pond dam/weir located 14 km downstream of Srisailam dam is under advanced stage of construction to hold the water released by the hydro turbines and later pump back into the Srisailam reservoir by operating the turbines in pump mode. The weir portion got breached in November 2015 unable to withstand the normal water release from the hydro power stations. Tail pond weir was completed during the year 2017 and pumping mode operation is being done even when the downstream Nagarjuna Sagar reservoir water level is below 531.5 feet (162 m) MSL. The tail pond has nearly 1 tmcft live storage capacity. From Wikipedia