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Navya MHS
LOCATION
1 State Karnataka
2 District Mandya
3 Taluk Srirangapattna
4 River Paschimavahini River
5 Tributary to Cauvery River
6 Nearest Village Palahalli (2.5km) on the right bank.
7 Nearest Town Srirangapattna (3.50 km) on the left bank
8 Nearest City Mysore (7.00 km)
9 Nearest Air- Port Mysore
Purpose of the Project
1 Purpose of the Project Generation and Transmission of Hydro Electric Power
Installed Capacity
1 Installed Capacity 2 x 1500 kW = 3.0 MW.
Annual Energy Generation
1 Annual Energy Generation 11.83 GWHr.
Power studies
1 Design Power Discharge 35.23 cumecs/ Unit, at rated head.
70.46 cumecs.
2 Maximum Power Discharge 42.28 cumecs/ Unit = 84.56 cumecs.
3 Design Flood (at Barrage site) 400 cumecs
Weir
1 Location Weir across Paschimavahini River, near Palahalli village, 3.50 km from Srirangapattna.
  Longitude 7639’56”
  Latitude 1525’16”
2 Type Gated, Concrete Gravity Weir
3 FRL El 679.50 m
4 Top of Bridge / Non Overflow Section El 680.50 m
5 Weir Crest El 676.00 m
6 Deepest Foundation level El 674.50m
7 Height of the Weir up to crest (from deepest foundation level) 1.50 m
8 Length of Overflow Section 44.00 m
9 Length of Intake cum Right Non overflow Section 71.59 m
10 Length of Left NOF Section 79.91 m
  Total 195.52 m
11 Flood discharge capacity of Weir 400 cumecs
Weir Gates
1 (a) Service Gate  
  i) Nos. 5
  ii) Size 7.00m x 3.50m, each
  iii) Type Vertical lift roller gate.
  iv) Hoist Rope Drum.
  (a) Stop log Gate  
  i) Sets 1 No
  ii) Size 7.00m x 3.50m
  iii) Type Vertical lift roller gate
  iv) Hoist Gantry Carne, movable type
Intake
1 No of Vents. 2
2 Vent Size 4.00 x 4.00m each
3 Sill Level 670.09 m
4 Hoist Bridge Level 680.50 m
5 Design Discharge 85 cumecs
6 Gates  
  (a) Service Gate  
  Nos. 2
  Size 4.00 x 4.00m each
  Type Vertical lift roller gate
  Hoist Rope drum.
  (b) Stop log Gate  
  Nos. 1
  Size 4.00 x 4.00m, each
  Type Vertical lift roller gate
  Hoist Gantry Crane
  (c) Trash Rack  
  Nos. 2
  Size 6.66 x 10.41 m
  Hoist Under Slung Monorail.
Power House
1 Location Right bank of Paschimavahini River about 400 m from Existing Bangarudoddi Weir.
2 Type Surface type
3 Size of Machine Hall (outer to Outer) 21.485 m x 20.294 m
4 Size of Service Bay, Control room and Switch gear room 21.485 m x 6.85 m
5 No. of Bays 2 unit bays and one Service bay
6 No. of Units and Capacity 2 Units of 1500 kW each (3MW)
7 El. of Turbine C/L El 672.09 m
8 Generator Floor Level El 672.00 m
9 Control Room, Service/Equipment handling Bay Level Floor Level El 680.00 m
10 Draft Tube floor Level El 664.875 m
11 HFL El 679.00 m
12 Min TWL El 672.95 m
Draft Tube Gates
1 No. of Vents 2
2 Size 6.20 m x 3.42m
3 Type Vertical Lift fixed wheel roller gate
4 Hoisting Arrangement Gantry Crane
Tail Channel
1 Length (including Tail Race Pool) 451.42m
2 Max. TWL El 674.79 m
3 High Flood Level (River) El 679.00m
4 Bed Width 30.00 m
5 Side Slopes 1:4 in Rock
    1:1 in Soft Rock and Soil
6 Design Discharge with overload 85 cumecs
7 Bed Slope 1 in2000 (appx)
8 Bed Levels Varying from 672.50m to 672.27m
Turbines
1 Type Horizontal ‘S’ Type Kaplan
2 Rated Output 1500kW
3 Maximum Net Head 6.38 m
4 Minimum Net Head 3.32 m
5 Rated Head 5.10 m
6 Rated Discharge per unit 35.23 cumecs
7 Maximum Discharge per unit 42.28 cumecs
8 Rated Speed 160 rpm (Indicative)
9 Runner Dia 2800 mm
10 Efficiency 92%
11 Continuous Over Load Capacity 120%
Generators
1 Type Synchronous generator.
2 Rated output 1500 kW
3 Generation voltage 11 kV
4 Rated Speed 750 rpm
5 Efficiency Generator 96%
6 Efficiency Gear Box 96.3%
Transmission lines
1 Length 4.00 km
2 Terminal Point KPTCL 11/33/11 kV sub-station at Srirangapattna.
3 Type 11 kV Double Circuit
Out Door Yard
1 Size 8.50 m x 13.00 m
2 No. of Power Transformers 2
Cost
1 Estimated cost of Civil works Rs.954.00 Lakhs
2 Estimated cost of E & M works Rs.495.00 Lakhs
3 Estimated cost of T-Transmission Rs.109.00 Lakhs
4 Basic Cost of the Project Rs.1558.00 Lakhs
5 Total cost including Escalations and Interest during Construction Rs.1751.00 Lakhs
Energy
1 Total Energy Generation 11.83 GWHr
2 Saleable Energy 11.77 GWHr
3 Cost of Energy Generation (1st year) Rs. 3.39 per unit.
4 Cost of Installation per KW Rs. 58,367.00
Implementation Period
1 Implementation Period 15 Months from zero date.
 

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