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  Nwdt Award | Main Dam | Hydropower Complex | Rehabilitation work | Environemental work | Canal Network

The Right To Information Act - 2005
  
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> MAIN DAM:

The salient features of the main dam of Sardar Sarovar Project are as under:

 STRUCTURE
Type: Concrete gravity
Length: 1210.02 m
Maximum height: 163.00 m
Top of dam Level: EL 146.5 m
Crest Level: EL 121.92 m
Max. Spillways discharge capacity: 84949.25cumecs(30lakh cusecs)
No. of Service spillways: 23 bays
No. of Auxiliary spillways: 7 bays
Type of Crest Gates: Radial
Size of Crest Gates:

18.30m x 16.76m (23 Nos.)
18.30m x 18.30 m (7 Nos.)

 HYDROLOGY
Watershed area above dam site: 88000 sq. km.(33970 sq.mile)
Mean annual rainfall: 1120mm (44.10 inch.)
Annual run-off at 50% dependability: .4.10 Mha m (33.20 MAF)
Annual run-off at 75% dependability: 3.36 Mha m (27.22 MAF)
Annual run-off at 90%  dependability: 2.44 Mha m (19.77 MAF)
Designed flood (1 in 1000 years): 87000Cumecs(30.7lakh cusecs)

  RESERVOIR

Full Reservoir Level (FRL):

 138.68m (455 ft)

Maximum Water Level:

 140.21m (460 ft)

Minimum Draw Down Level:

 110.64m (363 ft)

Normal tail Water Level:

 25.91m (85 ft)

Gross Storage Capacity:

 0.95 Million ha m (7.70 MAF)

Dead Storage Capacity:

 0.37 Million ha m (2.97 MAF)

Live Storage Capacity:

 0.58 Million ha m (4.73 MAF)

Annual evaporation:

 0.06 Million ha m (0.5 MAF)
Land Submergence at FRL: 37533 ha
No. of villages affected at FRL: 244
No. of families affected at FRL: 40963