Chirkey Dam : Design Wikipedia, the free encyclopedia

Chirkey Dam

Dam in Dagestan, Russia

Dam in Dagestan

42°58′37″N 46°52′16″E / 42.97694°N 46.87111°E / 42.97694; 46.87111StatusIn useConstruction began1964Opening date1976Owner(s)RusHydroDam and spillwaysType of damArchImpoundsSulak RiverHeight232.5 m (763 ft)Length338 m (1,109 ft)Width (crest)6 m (20 ft)Width (base)30 m (98 ft)Dam volume1,275,000 m³ (45,026,200 cu ft)Spillways1Spillway typeService, flood discharge tunnelSpillway capacity2,900 m³/s (102,413 cu ft/s)ReservoirCreatesChirkey ReservoirTotal capacity2,780,000,000 m³ (2,253,783 acre⋅ft)Catchment area11,290 km² (4,359 sq mi)Surface area42.4 km² (16 sq mi)Maximum water depth200 m (656 ft)Power StationCommission date1974-1976Hydraulic head205 m (673 ft) (max.)Turbines4 × 250 MW Francis-typeInstalled capacity1,000 MWAnnual generation2.47 billion kWh

The Chirkey Dam (Chirkeisk GES) is an arch dam on the Sulak River in Dagestan, Russia. The main purpose of the dam is hydroelectric power production, and it supports a 1,000 MW power station. Construction on the dam began in 1964, the first generator was operational by 1974, the last in 1976 while the project was officially completed in 1978. It is the tallest arch dam in Russia.

Design

The dam is a 232.5 m (763 ft) tall and 338 m (1,109 ft) long (crest) concrete arch dam. It is 6 m (20 ft) wide at its crest, 30 m (98 ft) wide at its base and contains 1,275,000 m³ (45,026,200 cu ft) of concrete. The dam withholds a 2,780,000,000 m³ (2,253,783 acre⋅ft) reservoir of which 1,320,000,000 m³ (1,070,141 acre⋅ft) is active or "useful" storage. The reservoir has a surface area of 42.4 km² (16 sq mi), length of 40 km (25 mi) and maximum width of 5 km (3 mi). Maximum depth of the reservoir is 200 m (656 ft) and its catchment area is 11,290 km² (4,359 sq mi).^[1]^[2]

The dam's spillway consists of a 509 m (1,670 ft) long non-pressure tunnel with its intake on the left bank of the dam. The spillway's capacity is 2,900 m³/s (102,413 cu ft/s). The dam's outlet works, spillway and power station have a combined discharge capacity of 3,550 m³/s (125,367 cu ft/s).^[1]

The dam's power station contains 4 × 250 MW Francis turbine-generators for a total installed capacity of 1,000 MW. Each generator is supplied with water by a penstock, all four of which intake on the upstream side of the dam's face and run down its surface toward the power station at the dam's base.^[1]

References

^ ^a ^b ^c "Hydro in the basin. Sulak" (in Russian). RusHydro. Archived from the original on 9 August 2011. Retrieved 13 January 2011.
^ "CHIRKEISK GES". JSC ChirkeyGESstroy. Archived from the original on 28 June 2018. Retrieved 13 January 2011.