CONSTRUCTION DETAILS OF SRISAILAM DAM

DETAILS:-                      Name Location Construction began Opening date	Srisailam Srisailam 1960 1981
DAM &SPILWAYS
Height Length Impounds Catchment area	904 512 mts (1680 fts) Krishna River 206,040 km2 (79,550 sq ml)
POWER STATION
Type of Turbines Turbines Installed capacity     Type of gates	Francis turbine                          6*150 MW (left bank)                                 7*110 MW (right bank) 1670 MW Radial crest gates

1.  Each gate contains 19.25 mt radius.
2. Deep foundation is 429 mts.
3. Cross sectional dimensions of the gate is 55 fts * 65 fts.
4. Total amount of steel used in gates is 220 tons.
5. The rope capacity is 180 tons.
6. Actually the dam was planned to 1050 fts, but due to the problems it was reduced to 904 fts.
7. Two tunnels were provided both sides of dam.
8. Each tunnel contain 50 feet mete diameter

 NAME OF POWER STATION: SRISAILAM LEFT BANK POWER STATION

         SALIENT FEATURES OF HYDROELECTRIC PROJECT

I. GENERAL

              1. Location                  :      Srisailam Dam West, Kurnool/MBNR Dist. A.P.

              2. Category                  :  Underground Hyde Power House, Pumped Storage Scheme

              3. Capacity                  : 6 x 150 MW = 900 MW

              4. Designed capacity   : 6 x 153 MW = 918 MW

              5. River                       : KRISHNA

              6. Dam                        : Srisailam Dam, across Krishna River in Nandi Kotkur,

                                                       Kurnool District , Andhra Pradesh.

              7. No. of Units            : SIX

              8. Design Energy (in Mu): 1200 MU

II. HYDROLOGY:

1.                         Reservoir                     :     Srisailam
2.                         Catchment Area           :      2, 03,597 Sq. K.M (79,530 Sq. Miles)
3.                        Max. Flood discharge   :     30,316 Cumecs
4.                        Live Storage                  :    247.79 TMC Ft.
5.                        Gross Storage                :    308.06 TMC Ft.
6.                                                                    (Between FRL: 885 Ft. andMDDL: 805 Ft)
7.                       Dead Storage                  :  60.3 TMC Ft. (2122 MCM) at 805 Ft.
8.                       Generation per TMC      :  5.5 MUS
9.                       Design Head                  :   91 M (Turbine Mode)
10.                                                                     95 M (Pump Mode)
11.                      Max. Gross head             : 375 Ft. (114.3 M) Turbine Mode
12.                      Design Net Head          : 82.8 M(153 MW)
13.                      Net HeadMax/Min       : 107.1 M (176 MW) / 65.3 M (106 MW) (Turbine Mode)
14.                      Full Reservoir level (FRL):  885 Ft. (269.75 M)
15.                     Min. Draw down Level (MDDL): 805 Ft. (245.37 M)
16.                     Tail Race water level for              :    Max. Discharge: 590 Ft

  IV. TECHNICAL:

1. TURBINE

                                  a) Type: Vertical Shaft, Francis Reversing

                                  b) Make: M/s. Hitachi, Japan

                                  c) Net Head Max. /Min: 107.1 M /65.3 M

                                  d) Design Net Head: 82.8 M

                                 e) Rated Output: 153 MW

                                 f) Output Max./ Min : 176 MW / 106 MW

                                 g) Normal Speed: 136.4 RPM

                                 h) Runway speed: 231 RPM

                        i) Disc. Through Machine: 6467 Cusecs (183.1 Cumecs)

• By using 1 tmc of water we can generate 606 millions of power.
• We can irrigate 10,000 acres of land by using 1 tmc of water.