SJVN LIMITED. (A Joint Venture of Govt

SJVN LIMITED. (A Joint Venture of Govt. of India & Govt. of Himachal Pradesh)

Jakhol Sankri Hydro-Electric Project (2 x 22 MW) Revised Pre- Feasibility Study Report (PFR)

SHIMLA January, 2016

INDEX

Serial No. Contents Page No.

1.1 Introduction 1

1.2 Power Scenario 1

1.3 Justification 2

1.4 Hydrology 3

1.5 Topography 3

1.6 Environmental Aspects 3

1.7 Geology 4

1.8 Alternative studies& Salient Features 4

1.9 Power Potential Studies 10

1.10 Electro-mechanical Equipment 10

1.11 Power Evacuation Aspects 11

1.12 Estimates of the Cost 11

1.13 Financial Aspects 11

1.14 Tariff 13

2.1 Layout Drawing

2.2 Alternative Layout- 1L, 2L, 3L & 4L

REVISED PRE FEASIBILITY STUDY REPORT JAKHOL SANKRI HYDRO-ELECTRIC PROJECT (44 MW)

1.1 Introduction The Jakhol Sankri Hydroelectric Project located in Uttarkashi district of Uttarakhand state envisages utilization of the water of river Supin for power generation on a run of the river type development harnessing a maximum gross head of about 445.80 m. The Supin River is the right bank tributary of the Tons River and Tons River is right bank tributary of Yamuna river located in Northern India. The diversion site is located at Latitude 31o05’19”N-31o07’06”N, Longitude 78o11’10”E-78o14’07”E, about 423 km north of New Delhi and 188 km north of Dehradun on the Supin River. The nearest railhead and airfield are located at Dehradun.

DPR of JSHEP (51 MW) was prepared & submitted to the GoUK in Decmber 2011, considering 10% of minimum flow during non-monsoon period as environmental releases. However considering the proposed revision in the environmental flows, the revised capacity of the project has been worked out as 44MW and the revised energy is 166.19 GWh in a 90% dependable year .This report presents the revised Pre-Feasibility Studies of the project.

1.2 Power Scenario India’s hydropower potential is estimated at around 1,50,000 MW, out of which only 42623.42 MW (28.42%) has been tapped so far. On the other hand, the gap between demand and supply of power has been increasing at a much faster rate especially during the last decade. The total power demand by 2030 is expected to cross 8,28,000 MW. Development of hydropower potential can significantly help bridge the gap between power demand and supply. In addition to meeting the power demand of the country, development of hydropower also helps in the development of water resources in general. Uttarakhand’s hydropower potential is estimated at around 25,000 MW, out of which only 3164.75 MW (about 12.65%) has so far been harnessed. There are some major projects in various stages of implementation.

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These are Bharon Ghati (I,II) 380 MW, Garba Tawaghat (630 MW), Tehri Stage – II (1000 MW), Kotli Bhel (850 MW).

The Jakhol Sankri Hydroelectric Project (JSHEP) forms a part of the cascade development planned along river Supin and river Tons (after its confluence with the river Tons) in Uttarkashi district of Uttarakhand State. There are several hydropower projects under different stages of development in this river basin. These are mainly Naitwar Mori HEP, Mori Hanol HEP and Hanol Tiuni HEP. In addition, River Tons has about 500 MW of identified hydropower projects under development. Jakhol Sankri HEP is one of the three hydropower projects awarded to SJVN Ltd. in the State of Uttarakhand. The other two projects are Naitwar Mori HEP on river Tons downstream of Jakhol Sankri HEP and Devasari HEP on river Pindar, a major tributary of river Alaknanda, in district Chamoli.

1.3 Justification In India demand for electric energy is growing at an average annual compound growth rate of 7-8% per year. Per capita consumption of electricity has increased from 15 kWh in the year 1950 to 612.5 kWh in the year 2004-05, 717 kwh in 2007- 2008, 779 kwh in 2009-2010 and 917.18 KWh in 2012-13. During the 12th five year Plan (2012-2017) 1,18,537 MW capacities shall have to be added. Out of this, hydropower is expected to account for almost 10,897 MW.

The total installed capacity as on 30 November 2015 was 2,82,023.39 MW, comprising thermal power at 1,96,204.44 MW accounting for 69.57% of the capacity, hydropower at 42623.42 MW accounting for 15.11 %, nuclear power at 5780 MW about 2.05% and the other Renewable energy source at 37415.53 MW including wind power accounting to about 13.27 %. For a balanced energy mix, the proportion of hydropower should be increased to 30 % in short term and 40 % in long term. As per the CEA report “Growth of Electricity sector in India from 1947-2013” the shortage in energy demand is 86905 GWh (8.71%) and Peak demand is 12159 MW (8.98%) for the year 2012-13.

The development of hydropower in Uttarakhand not only benefits the state but will meet the power requirements of the neighbouring states and northern region of the ______Page 2 of 13

country. Uttarakhand is currently a net importer of electric power, but generates a seasonal surplus and plans to become a net exporter of power by expanding its hydropower and high voltage transmission capacity. Total capacity expansion of 10,000 MW is planned by the year 2018. The development of Jakhol Sankri Hydroelectric Project (JSHEP) has been taken up in the direction of achieving the above targets.

1.4 Hydrology The river Supin has a total catchment area of about 268.20 sq km at the proposed barrage site. The water availability for the project has been considered on the basis of 10 daily discharge data of river Supin at Tiuni gauge site after subtracting from it the discharge data of river Pabar at Tiuni gauge site, for the period 1977-78 to June- 2012. The water availability at the barrage site has been derived from the above data on the basis of catchment area proportion. The computed inflow series worked out has been utilized for Power Potential Studies. The 1 in 100 year flood at the barrage location is 270 m3/s.

1.5 Topography Topographic survey data of the project location is available on scale of 1: 5000 & 1: 500. A reservoir level at 1959.40 MSL was defined as upper limit. This limit assures that permanent settlements, roads and the existing Reserved Forest areas as part of the Govind Wildlife Sanctuary will not be inundated.

1.6 Environmental Aspects There is no displacement of population from the project site. The environmental flows requirements downstream of the diversion structure are given in Table No-1. The submergence area is 0.24 Ha. having no inundation due to project and does not have any adverse impact on hydrological regime or on the catchment area and the project is environmentally sustainable.

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Table No-1 Season Environmental Flow % of Average Flow (cumecs) June-Sept 3.51 30 Oct- Nov 1.61 25 Dec-March 0.63 20 April-May 1.61 25

1.7 Geology Detailed geological investigations have been carried out for barrage and powerhouse locations (layout plan is enclosed). Geo-technical investigations have been carried out at the Barrage site. Necessary test and investigations have been carried out for all aspects of the project.

1.8 Alternative studies & Salient Features The following alternatives were studied as part of feasibility study for the project. • 1L Alternative: Barrage site is located upstream of Jakhol village, some 25m upstream of the suspension bridge and at immediate upstream of confluence of Bar Gad and Supin. Approximately 6 Kms long HRT runs along the left bank terminating in an underground powerhouse cavern through pressure shaft. FRL is in the order of 1886 MSL. Setting of turbines is taken as 1510 MSL, thus providing 376m of gross head.

• 2L-Alternative: Arch type Dam of 80.0m height located at 25m downstream of the suspension bridge had been considered with highest FRL at 1932 MSL keeping clear from wild life area boundary. A water conductor system slightly less than 6 kms was planned at left bank and ends in the same power house cavern as in case of alternative 1L thereby providing a maximum gross head of 422m.

• 3L-Alternative: This alternative comprises a Trench Weir at around 1600m upstream of 1L barrage location, an underground Desilting Chamber, some 6.5 kms long HRT on the left bank and an underground powerhouse. The steep river slope in this 1600m reach facilitated considerable increase in head. After careful examination

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of the various investigation data obtained during preparation of DPR of 51 MW, two changes have been adopted in this alternative during detailed project study. i) The diversion structure shall be a concrete gated Barrage structure by replacing the Trench Weir in light of its functional advantages over Trench weir. The design of the Barrage shall be in accordance with structure on permeable foundation prescribed by various IS codes and CBIP. ii) There is provision of surface Penstock to cross the Purola thrust by a safe margin.

• 4L-Alternative: Powerhouse is to be located upstream of the Purola Thrust and consequently cross the Thrust with Tailrace Tunnel (TRT).

Selected Alternative-3L: Salient features of the scheme are given below:- Salient Features

I) LOCATION i) State Uttarakhand (formerly Uttaranchal) ii) District Uttarkashi iii) Tehsil Mori iv) Latitude 31o05’19’’N - 31o07’06’’N v) Longitude 78o11’10’’E - 78o14’07’’E vi) Nearest Rail head Dehradun vii) Nearest Airport / Approach Dehradun viii) Name of River / Tributary Supin (Tributary of river Tons) ix) Name of River Basin Yamuna River Basin II) HYDROLOGY AND CLIMATE i) Catchment Area up to head works 268.20 (km2) ii) Snow Catchment area (km2) 29.50 (11% of total) iii) Average annual Yield (Mm3) 359.72 iv) Maximum / Minimum Yield (Mm3) 667.96 – Year 1990-91 / 214.07 – Year 2000-01 v) Design Flood (m3/s) 270 (1 in 100 yr.) vi) Maximum temperature 35oC

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vii) Minimum temperature 0o C viii) Design Horizontal Seismic Coeff. 0.15 ix) Design Vertical Seismic Coeff. 0.10 III) DIVERSION STRUCTURE i) Type Barrage ii) Average River Bed Level at Barrage EL 1955.00 m Axis iii) Deepest Foundation Level EL 1945.20 m iv) Elevation at top of Barrage EL 1962.20 m v) Length of Barrage at top (m) 33.00 vi) Freeboard above MWL (m) 1.00 vii) FRL EL 1959.40 m viii) MWL EL 1961.20 m ix) Maximum height above deepest 17.00 foundation (m) x) No. & size of gates (Vertical gates) 4 Nos. – 5.00m (W) x 4.40m (H) IV) RIVER DIVERSION ARRANGEMENT i) Diversion Pipes (Size, type and 1.65 m diameter Steel Pipes, 3 number) Nos. ii) Pipe Length 187.40 m iii) Construction Flood (m3/s) (1 in 25yr) U/s Coffer Dam iv) Height (m) 4.00 v) Bottom Width (m) 19.0 vi) Length (m) 29.21 vii) U/s Coffer Dam Top Elevation EL 1962.50 m viii) Invert Elevation of Inlet Pipe (U/s) EL 1960.00 m

D/s Coffer Dam ix) Height (m) 3.0 x) Bottom Width (m) 15.0 xi) Length (m) 38.15 xii) D/s Coffer Dam Top Elevation EL 1955.50 m

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xiii) Invert Elevation of Outlet Pipe (D/s) EL 1953.00 m V) DESILTING TANK i) Type Underground, Twin Chamber ii) Number and size Two,100.00m (L) x 12.00m (W) x 12.27m (H) iii) Particle size to be removed (mm) 0.2 iv) Number of Adits One v) Flow Through Velocity (m/sec) 0.167 VI) HEAD RACE TUNNEL i) Length and shape (m) 6624.48 , Modified Horse Shoe Shaped ii) Diameter (m) 3.0 m (finished) iii) Design discharge (m3/s) 11.40 iv) Bed Slope 1 in 375 v) No. of Bends in HRT 4 vi) Design Velocity (m/sec) 1.56 VII) ADITS i) Number of Adits 04 ii) Length of Adit – 1 (m) 185.28 iii) Length of Adit – 2 (m) 392.10 iv) Length of Adit – 3 (m) 353.20 v) Length of Adit – 4 (m) 208.13 vi) Gated Plug Adit No.-3 vii) Type Hinge Type viii) Size of Gate 2.5m x 2.5m VIII) SURGE SHAFT i) Type Underground Restricted Orifice ii) Shape Circular iii) Diameter (m) 7.5 m iv) Height (m) 42.32 IX) PRESSURE SHAFT / PENSTOCK i) Type Steel Lined Partly on surface & partly underground

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ii) Shape Circular iii) Number One iv) Internal Dia. of Pressure Shaft (m) 2.0 v) Length of pressure shaft (m) 707.34 vi) Length of Surface Penstock (m) 166.85 vii) Design discharge through pressure 11.40 shaft / penstock (m3/s) viii) Maximum Velocity through 3.63 Pressure Shaft/ Penstock (m/sec) ix) Internal Diameter of unit penstock 1.3 –feeding each unit (m) x) Length of unit Penstock (m) 50.55 xi) Steel type ASTMA-537 Class-2 xii) Penstock Gate at Surge Shaft 1 no. xiii) Valve House 2m dia. butterfly type valve. xiv) Main Inlet valve, (type & 2 Nos., 1.3 m dia Spherical type diameter) X) UNDERGROUND POWERHOUSE i) Type Underground ii) Location Left Bank of River Supin, about 200 m upstream of confluence of Supin and Tons. iii) Number of Units 02 iv) Installed Capacity Per Unit (MW) 22 v) Installed capacity (MW) 2 X 22 vi) Continuous Overloading 10% vii) Maximum Gross Head 445.80 m viii) Design Head 436.36 ix) Type of turbine Vertical Pelton x) Efficiency of Turbine 92% xi) Centre Line of Turbine EL 1513.60 m xii) Maximum Tail Water Level EL 1510.66 m xiii) Rated Discharge through each unit 5.7 (m3/s)

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xvi) Efficiency of Generator 98% xvii) Size of power house Cavern 58.425m (L) x 16.75m (W) x (including service bay) 34.75m (H) xviii) Size of Transformer Cavern 44.50 m(L) x 12.00 m(W) x 26.78 m(H) xix) No. of Transformers 02 xxi) Transformer Floor Level El 1523.0 m xxii) Bus Duct Gallery 4.0m (W) x 4.5 m (H) xxiii) Power House EOT Cranes - Nos. 1 - Capacity 80/20/5 MT XI) TAILRACE TUNNEL / CHANNEL i) No. of tail Race Conduits 02 ii) Size of Tail Race Conduits 4.9m (W) x 1.5m (H) iii) No. of Tail race Tunnel 01 iv) Type & Size of Tailrace Tunnel D-shaped, 3.5m (W) X 3.75m (H) v) Length of Tailrace Tunnel (m) 155.52 vi) Nominal Discharge (m3/s) 11.40 vii) EL of the downstream crest 1508.36 m XII) SUBSTATION i) Type of Substation Gas Insulated Switchgear (Indoor) ii) Bus Arrangement Single Bus with Sectionaliser. iii) Voltage 220 kV XIII) POTHEAD YARD i) Type Outdoor ii) Elevation EL 1540.0 m iii) Size 71.5m (L) X 34.0m (W) iv) Voltage 220 kV v) No of outgoing feeder 2 nos. 220 kV lines XIV) POWER BENEFITS i) Design Energy (GWh/annum) 166.19 MU XV) TOTAL CONSTRUCTION PERIOD 4 years (48 Months)

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XVI) COST ESTIMATES (Rs. in crore) @ November 2015 Price level i) Civil & H-M 245.14 ii) Electrical / Mechanical 144.40 iii) Sub-Total (Generation) 389.54 iv) IDC & Front end fee 52.77 v) Total Cost with IDC & Front End 442.31 Fee XVII) LEVELISED TARRIF Levelised Tariff (Rs. / kWh) (with 6.94 i) free power to home state ii) First Year Tariff (Rs. / kWh) (with 7.10 free power to home state iii) Cost per MW with IDC & FC – in crore 10.05 iv) Cost per MW without IDC, FC 8.85 – in crore

1.9 Power Potential Studies The computed inflow series for 35 years i.e., from 1977-78 to June-2012 have been considered in assessing the power benefits from the project. Based on energy generation estimates the year 1984-85 corresponds to 90% dependable year. Accordingly an installed capacity of 2 x 22 MW with two vertical Pelton Turbines has been provided. The entire water conductor system has been designed for a discharge of 11.40 m3/s. The annual primary design energy availability in 90% dependable year is 166.19 GWh (or million units) in an average year.

1.10 Electro-mechanical Equipment Jakhol Sankri H.E Project envisages installation of 2 units, each of 22 MW in underground powerhouse. Main equipment comprises of 2 nos. of Vertical Pelton Turbines & main inlet valve of spherical type complete with unit auxiliaries, two nos. Hydro Generators and 2 nos. three-phase generator step-up transformers. Design discharge and net design head are 11.40 m3/sec and 436.36 m respectively.

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1.11 Power Evacuation Aspects For evacuating the 44 MW power of Jakhol Sankri HEP, the most suitable and economical system is 220 kV double circuit line system. The power plant shall be connected to proposed Mori Sub Station.

1.12 Estimates of the Cost The estimate of cost has been prepared as per “Guidelines for Formulation of Detailed Project Reports for Hydro-electric Schemes” issued by Central Electricity Authority to arrive at the hard cost of the project at November 2015 price level.

The hard cost of civil & hydro-mechanical, electro-mechanical works have been estimated as Rs. 245.14 crore, and Rs. 144.40 crore respectively. Total hard cost comes out to be Rs. 389.54 crore which also includes cost of preliminary works, all civil, H-M & E-M works, Land, buildings, plantation, communication, special T & P, Environment & Ecology, miscellaneous & maintenance works. The breakdown of the cost is given below in the following table:-

Table No-2 Breakdown of Cost

S.No. Description of item Amount in Rs Crore 1 Civil & HM Works cost 245.14 2 Electro Mechanical Works 144.40 3 Total Hard cost 389.54 4 Interest during construction 49.67 5 Front End Fee 3.10 6 Total Cost including IDC,Front end fee 442.31 7 Cost per MW 10.05

1.13 Financial Aspects The levelized tariff has been worked out as per “Tariff Regulations for 2014 to 2019” issued by Central Electricity Regulatory Commission (CERC). Financial parameters like project life, return on equity, tax on return on equity, depreciation limit, average depreciation, repayment period, auxiliary consumption, transformation losses,

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operation and maintenance charges, escalation in O & M charges, maintenance spares, receivables in terms of monthly billing and discount rate for tariff have been adopted as per CERC guidelines. The project is planned to be financed by 30% equity and 70% of commercial Rupee loan to be availed at an interest of 11.65% per annum. Interest on working capital is adopted as 12.80%.

All basic data and assumptions have been summarized in the following table:-

Table No-3 Basic data and assumption for economic evaluation

Sl.No. Item Parameters adopted 1 Life of the project 35 years 2 Planned construction period 4 years 3 Debt - equity ratio 2.33:1 4 Loan 70% 5 Equity 30% 6 Annual interest on loan 11.65% 7 Annual interest on working capital 12.80% 8 Return on equity 16.50% 9 Depreciation limit 90% 10 Receivables (in terms of monthly billing) 2 months 11 Auxiliary consumption 1.2% 12 Free power (i/c 1% for Local Area 13% Development Fund)

An auxiliary consumption of 1.2%, free power of 12% to the State and 1% of generated energy as free energy towards the Local Area Development Fund (LADF) has been considered in computation of tariff. The saleable energy will be the Design Energy minus the above consumption.

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1.14 Tariff The tariff worked out is summarized as below: Considering total cost including IDC, Front end fee and, the tariff for first year and levelised tariff have been worked out as Rs. 7.10 per kWh and Rs. 6.94 per kWh respectively.

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SJVN LIMITED esajaovaIena ilaimaToD FOR PRE FEASIBILITY STUDY REPORT ONLY DESIGN NM & JS HEP'S, SHIMLA UNLESS OTHERWISE SPECIFIED. NOTES TAKEN AS CORRECT. 1. ALL DIMENSIONS ARE IN MILLIMETERS AND ELEVATIONS METERS 2. NO DIMENSION SHALL BE SCALED OUT ONLY WRITTEN DIMENSIONS ARE TO GENERAL LAYOUT PLAN & L- SECTION jaKaola saaMkrI jala ivaVut piryaaojanaa ]0 K0

JAKHOL SANKRI H. E. PROJECT (U. K.) 46MW

31750N

39500E

38250E

38750E

39250E

38500E

38000E 39750E

32000N 37750E

39000E

DEP

TONS RIVER TONS 40000E

32250N

40250E

40500E

32500N

SUPIN RIVER TUNNEL RACE TAIL

40750E 785 1507.72 7738.56

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T.W.L. 1510.36 OF END

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PH-I 16 PH-I

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32750N SLOPE OF TAILRACE - 1:1000

DEP DEP 176.86

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2100

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2000 41000E

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2275 1775

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2225

1825

1875

41250E

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42000E

42250E SUPIN RIVER 42500E

HRT-7 35000N

42750E

END OF HRT BEND-3 HRT OF END 1940.30 2122.14 4495.11

AD3-2

43000E

HRT-6

4491.21 1940.31 2121.47 START OF HRT BEND-3 HRT OF START

2425

2325

33250N

1940.78

2168.17

2275 4315.16

2375

CONSTRUCTION ADIT-3 CONSTRUCTION CONST.ADIT-3

43250E 2200 35250N

2125 AD3-1

2050

SKS 2019.51 SKS SK I 1972.36 I SK

2425 SK II 2006.74 II SK 2000

2400

2350 35500N 2325 2425 1900

2300 1775 1825

2275 43000E 2400 2175

2200 2000 HRT BEND-3

2375

SK III 2 III SK 088.22

JK S 2225.37 S JK 2125

2100 2350

2325

1900 35750N

43250E NSL

43500E

JAKHOL 1950 43750E L-SECTION

GENERAL LAYOUT PLAN 36000N

HEAD RACE TUNNEL 3.0 m DIA 6624.48 LONG MODIFIED HORSE SHOE TYPE

JK ROAD 2171.39 ROAD JK

44000E 36250N

HRT-5

HRT-4

1960

DEP

Road Under Construction Under Road AD2-1

2450 CONST.ADIT-2

Barrage Site 1940.00 Site Barrage

DHARA I 2242.17 I DHARA 36500N 392.1

2025

AD2-2

DHARA II 2282.205 II DHARA

CULTIVATION

2475 44250E

36750N

1947.50 END OF HRT BEND-2 HRT OF END 2550 2052.80 1801.29

START OF HRT BEND-2 HRT OF START

VILL DHARA VILL

U/S I 2058.49 I U/S 2056.16

1794.39 1947.52

U/S II 2030.64 II U/S

1587.91 1948.07

Mule Track Mule 2165.80 CONSTRUCTION ADIT-2 CONSTRUCTION

37000N CULTIVATION

NSL

44500E

37250N

DESILTING CHAMBER DESILTING UNDERGROUND HRT-3

HRT-2

TE S

A NE HT-

G TE G HRT-1 A UN

T G H K

E A G

C I

A H

INT G

R S

N U

I APED,

D L

RT F

A H

-SH T

HE D I F

AD1-4 S

T IL

14365 S

ION

Sup

I m)

(4m in

20 L

ANS NN

Rive

0 R 0

R 8 8

TU 1 1

0 0

S 1 1

S 1

BE C

E C r S T A M T

A A

H G

IN 2

IN 1 3

SI E

R GROU

E D BEND-2 HRT

N POWER INTAKE POWER A

100

IT m)

.AD m

T 104.77

S (4

N 30

(4mx4m) AD1-1

1 -

T I D

S TRA A . T NS O / C

in 37500N

e r

AD1-3 E

ILT

E 3 7

7 D 5 N

44750E 2H:1V

2H:1V 0

D 0

E FF O C

S / D

2H:1V

0 N

53.2

19 . L E

FI 371

2 5N EL.1953.20

L 2525

EL.1959.00 3

7 150

BASE EL. 1953.20

5 2 STILLING BASIN BASE RETAINING WALL

3 3 5 EL.1959.00

OA E R D I

H W C EL.1963.50 EL.1962.20 A

m EL.1962.20 16

00 371

PPR E

5 A EL.1962.20 P I 5N

L L

EL.1962.20

ROAD ROAD AXIS CREST CL.

I 75

S GE

)

0 R

L ROAD BRIDGE ROAD C

0 E

- - I

OS. OS.

∅

0 300 VENT PIPE VENT 300 ∅

0 .

. 6

EL CAVE 4.5 1

EL.1956.0

5.00

19 .

SERVICE GATE SERVICE RACK TRASH

2.20

EMERGENY GATE EMERGENY 6 7

9 2 1 00N 2275 . L E

AD1-2

7 VE

1V 5 2H:1V :

H N

L E

R E FF O C

S / U 2H:1V

2H:1V

5 0N

275

3730

0 N

7 3 25N

2325

37750N

2400

45000E R

ve r

394.12 1951.26 END OF HRT BEND-1 HRT OF END

2123.66

HRT BEND-1 HRT HRT INLET HRT

HRT START (CHAINAGE 338.29M) 392.41 1951.27 2123.19

START OF HRT BEND-1 HRT OF START

1951.40 331.76

EL. 1952.90 2106.48

2400 CHAMBER DESILTING OF END

F.R.L.1959.40

2350

SLOPE 1 : 75

183.74

100 1960.00

DESILTING CHAMBER 2024.16

UNDERGROUND ADIT-1 CONSTRUCTION

SLOPE 1 : 75 EL.1961.67 EL.1951.40

1955.87 F.R.L.1959.40 2023.32

30 181.77

38000N EL.1955.87

EL.1960.00 FLOW CHAMBER DESILTING OF START

2400

28 2000.56 62.88

CONST. ADIT - 1 - ADIT CONST. POWER INTAKE POWER TUNNEL BEND-1 TUNNEL POWER

2375 D-SHAPED HEIGHT 4m APPROACH TUNNEL

NSL

1963.58 1956.00

SLOPE 1(V) IN 1385.73(H) 00.00 M20 SERVICE GATE SERVICE

EMERGENY GATE M10

ROPE DRUM HOIST POWER INTAKE INTAKE POWER POINT START

TRASH RACK CLEANING MACHINE M10 CABIN 1200 THK. BOULDER PITCHING 300 THK. GRADED FILTER

EL.1962.20 EL.1960.00 MWL EL.1961.20 FRL EL.1959.40 TRASH RACK EL.1956.00 EL.1955.00 EL.1955.50 2350 FLOW

2325 2325

2250 CL. OF BARRAGE AXIS BARRAGE OF CL.

S 2300

Wild Life Boundry Life Wild

W 2175

1100

2100 1700 1200 1900 1800 1600 2200 1500 1400 1300 2000

N 2125 METRES NSL IN

METRES 2075 DATUM 1000 CHAINAGE IN INVERT LEVEL IN METERS

OBRA GAAD SUPIN