Ichari Dam

The Ichari Dam is a concrete gravity dam on the Tons River 13 km north of Dakpathar in Uttarakhand, India. The primary purpose of the dam is hydroelectric power production and it is a run-of-the-river-type. It was completed in 1972. The dam diverts water to the Chibro Power Station (240 MW) which is then returned to the Tons River before being fed to the Khodri Power Station (120 MW).

Design and operation
The dam is a 59 m tall and 155 m long concrete gravity type with a structural volume of 181000 m3. The dam's spillway is located across its crest and is controlled by seven floodgates. It has a maximum discharge capacity of 13500 m3/s. The dam's reservoir has a 8930000 m3 capacity, of which 5110000 m3 is active (or "useful") capacity. The surface area of the reservoir is 8 km2.

Chibro Power Plant
Adjacent to the dam and on its left bank, water is diverted into a 6.2 km head-race tunnel which leads south to the underground power station at 30.55639°N, 77.79806°W. There, the water powers four 60 MW Francis turbine-generators. The design hydraulic head of the station is 110 m and its design discharge is 200 m3/s. The plant was commissioned in 1975 and was the first power plant built underground in Northern India. Made by

Khodri Power Plant
Water discharged from the Chibro Power Plant is returned into the Tons River just 100 m upstream of the intake for the Khodri Power Station. Water enters the intake and then travels south down a 7.5 km head-race tunnel which leads to the power station on the Yamuna River at 30.50833°N, 77.79972°W. There, the water powers four 30 MW Francis turbine-generators before being discharged into a tail-race channel behind the Dakpathar Barrage. The design hydraulic head of the station is 57.9 m and its design discharge is 200 m3/s. The plant was commissioned in January 1984.