Tidong-I Phase-II HEP Detailed Project Report NSL Tidong Power Generation Pvt. Ltd.
TIDONG-I PHASE-II HYDRO ELECTRIC PROJECT
DETAILED PROJECT REPORT
VOLUME I
: MAIN REPORT
VOLUME II
: DRAWINGS
Tidong-I Phase-II HEP Detailed Project Report NSL Tidong Power Generation Pvt. Ltd. Table of Contents
Indo Canadian Consultancy Services Ltd. 1 P-1143
Table of Contents
BIBLIOGRAPHY OF ABBREVIATIONS ................................................................................................ 6
CHECK LIST ........................................................................................................................................... 8
SALIENT FEATURES ........................................................................................................................... 16
1 INTRODUCTION ........................................................................................................................ 22 1.1 General ............................................................................................................................... 22 1.2 Present Study For Additional Unit of 50 MW of Tidong –I, Phase - II ............................... 24 1.3 Proposed scheme ............................................................................................................... 24
2 PROJECT SUMMARY ................................................................................................................ 26 2.1 General ............................................................................................................................... 26 2.2 Main Components ............................................................................................................... 26
2.2.1 Diversion works ........................................................................................................... 26 2.2.2 Head Regulator ........................................................................................................... 27 2.2.3 Desilting Basin ............................................................................................................. 27 2.2.4 Reservoir ..................................................................................................................... 27 2.2.5 Head Race Tunnel ...................................................................................................... 27 2.2.6 Surge Shaft ................................................................................................................. 28 2.2.7 Valve House ................................................................................................................ 28 2.2.8 Pressure Shaft ............................................................................................................. 28 2.2.9 Power House Complex ................................................................................................ 29 2.2.10 Tail Race Channel ....................................................................................................... 29
2.3 Transmission System .......................................................................................................... 29 2.3.1 Power Benefits ............................................................................................................ 30
3 SOCIO-ECONOMIC SCENE OF HIMACHAL PRADESH .......................................................... 31 3.1 General ............................................................................................................................... 31 3.2 People, Culture And Religion Of Himachal Pradesh .......................................................... 32
3.2.1 The People .................................................................................................................. 32 3.2.2 The Dress .................................................................................................................... 33 3.2.3 Houses and Equipment ............................................................................................... 34 3.2.4 Cuisine of Himachal Pradesh ...................................................................................... 35 3.2.5 Religion ....................................................................................................................... 36 3.2.6 Monasticism ................................................................................................................ 36 3.2.7 Festivals ...................................................................................................................... 37 3.2.8 Music and Dance ......................................................................................................... 37 3.2.9 Language .................................................................................................................... 38
3.6 Status Of Industry In Himachal Pradesh ............................................................................. 47 3.6.1 Agriculture ................................................................................................................... 49 3.6.2 Animal Husbandary ..................................................................................................... 50 3.6.3 Livestock ..................................................................................................................... 51 3.6.4 Handicraft .................................................................................................................... 51 3.6.5 Textiles ........................................................................................................................ 52 3.6.6 Mineral-Based ............................................................................................................. 52 3.6.7 Power .......................................................................................................................... 52 3.6.8 Tourism ....................................................................................................................... 53 3.6.9 Pharmaceuticals .......................................................................................................... 53 3.6.10 Business Opportunities ............................................................................................... 54
3.7 Fact File For Kinnaur District .............................................................................................. 54 4 POWER SCENARIO .................................................................................................................. 58
4.1 General ............................................................................................................................... 58 4.2 Power Scenario ................................................................................................................... 61
4.2.1 Power Development in India ....................................................................................... 61 4.2.2 Power Planning Concept ............................................................................................. 61 4.2.3 Central Sector Participation ........................................................................................ 62 4.2.4 Power Sector Reforms in India ................................................................................... 62
4.3 Installed Capacity In The Country ....................................................................................... 62 4.4 Power Scenerio For Northern Region And Himachal Pradesh........................................... 63
4.4.1 Hydro Power Potentail in Northern Region ................................................................. 63 4.4.2 Status of Hydro and Thermal Power Projects in the Region ....................................... 64 4.4.3 Power Generation and Sales in Himachal Pradesh .................................................... 64 4.4.4 Power Consumption .................................................................................................... 67 4.4.5 Sector - Wise Energy Utilization For Himachal Pradesh ............................................. 67 4.4.6 Power Shortage in Northern India and Himachal Pradesh ......................................... 69
4.5 Status Of Rural Electrification In Himachal Pradesh .......................................................... 70 4.6 Requirement of Capacity Additions .................................................................................... 71
4.6.1 Resources for Power Development In Northern Region ............................................. 71 4.6.2 Power potential in the state of Himachal Pradesh – exploited and available ............. 72 4.6.3 Existing and under investigation hydro projects. ......................................................... 72
4.7 Participation By Private Sector In Development Of Hydro Projects ................................... 73 4.8 Clean Development Mechanism (CDM) ............................................................................. 74 4.9 Necessity Of The Project And Related Aspects ................................................................. 74
6.10.1 Dicken’s Empirical Formula ......................................................................................... 85 6.10.2 Unit Hydrograph Method ............................................................................................. 86 6.10.3 Ryve’s Formula ........................................................................................................... 88 6.10.4 Design flood proposed to be adopted ......................................................................... 88
6.11 Discharge Data ................................................................................................................... 89 6.11.1 Available Discharge Data ............................................................................................ 89 6.11.2 Analysis of available data ............................................................................................ 89
6.12 Flow Duration Curve ........................................................................................................... 92 6.13 Further Study ...................................................................................................................... 93
8 POWER POTENTIAL STUDIES ............................................................................................... 111 8.1 General ............................................................................................................................. 111 8.2 Hydrological Data .............................................................................................................. 111 8.3 Head .................................................................................................................................. 113 8.4 Combined Turbine Generator Efficiencies of The Unit ..................................................... 113 8.5 Methodology For Power Potential Analysis ...................................................................... 113 8.6 Power Potential Analysis .................................................................................................. 114 8.7 Number Of Generating Units ............................................................................................ 115 8.8 Conclusion ........................................................................................................................ 116
9 CIVIL STRUCTURES & HYDRO-MECHANICAL EQUIPMENT ............................................... 118 9.1 General ............................................................................................................................. 118 9.2 Headworks At Upstream ................................................................................................... 118
9.6.1 Tunnel support system .............................................................................................. 125 9.6.2 Tunnel reach in very good rock ................................................................................. 125 9.6.3 Tunnel reach in Good rock ........................................................................................ 125 9.6.4 Tunnel reach in Fair rock........................................................................................... 125 9.6.5 Tunnel reach in Poor rock/Shear zone ...................................................................... 125 9.6.6 Tunnel Concrete Lining ............................................................................................. 126
Tidong-I Phase-II HEP Detailed Project Report NSL Tidong Power Generation Pvt. Ltd. Table of Contents
9.8 Pressure Shaft .................................................................................................................. 127 9.9 Power house complex ....................................................................................................... 128 9.10 Tail Race Ducts And Channel ........................................................................................... 129 9.11 Transformer Hall, GIS And Control Room ........................................................................ 129 9.12 Additional Works Required For The 3rd Unit (Phase-II) ................................................... 129
10 POWER PLANT-ELECTRICAL & MECHANICAL WORKS .................................................. 131 10.1 General ............................................................................................................................. 131 10.2 Turbine -Capacity And Type ............................................................................................. 131 10.3 Main Turbine Parameters ................................................................................................. 134 10.4 Description Of Electromechanical Equipment .................................................................. 134
10.4.1 Turbine ...................................................................................................................... 134 10.4.2 Governor ................................................................................................................... 137 10.4.3 Main Inlet Valve (MIV) ............................................................................................... 138 10.4.4 Generator and excitation system .............................................................................. 138 10.4.5 Automation control, metering and protection ............................................................ 139 10.4.6 Station switching scheme and type of 220kV switching equipment .......................... 140 10.4.7 Transformers ............................................................................................................. 140 10.4.8 Electrical Auxiliaries .................................................................................................. 140 10.4.9 Mechanical auxiliaries ............................................................................................... 142
11 POWER EVACUATION ARRANGEMENTS ......................................................................... 144 11.1 Introduction ....................................................................................................................... 144 11.2 Load Demand ................................................................................................................... 144 11.3 Transmission Lines ........................................................................................................... 144 11.4 Identification Of Transmission System ............................................................................. 146 11.5 Power Evacuation From Tidong-I Phase-II HEP .............................................................. 147 11.6 Status Of Open Access/ Connectivity ............................................................................... 147
12 INFRASTRUCTURE FACILITIES ......................................................................................... 159 12.1 General ............................................................................................................................. 159 12.2 Access Roads And Strengthning Of Exesting Roads ....................................................... 159 12.3 Tele-Communication ......................................................................................................... 160 12.4 Construction Power ........................................................................................................... 161 12.5 Explosive Magazine .......................................................................................................... 161 12.6 Infrastructure For Phase – II Works .................................................................................. 161
13 CONSTRUCTION METHODOLOGY & EQUIPMENT PLANNING ....................................... 162 13.1 General ............................................................................................................................. 162
13.1.1 Surge Shaft ............................................................................................................... 163 13.1.2 Unit-3 Pressure Shaft ................................................................................................ 163 13.1.3 Power House and other outlet structures .................................................................. 163
14 CONSTRUCTION SCHEDULE ............................................................................................ 164 14.1 General ............................................................................................................................. 164
15 PROJECT ORGANIZATION ................................................................................................. 166 15.1 General ............................................................................................................................. 166 15.2 Project Organisation ......................................................................................................... 166 15.3 Functions And Responsibilities Of Project Team Members ............................................. 167
16.7.1 Restoration of construction areas and disposal of muck .......................................... 174 16.7.2 Anti Poaching Measures ........................................................................................... 174 16.7.3 Environmental Impact and Mitigation Measures ....................................................... 174
17 COST ESTIMATE ................................................................................................................. 182 17.1 General ............................................................................................................................. 182 17.2 Basis of Cost Estimate ...................................................................................................... 182 17.3 Escalation in Cost ............................................................................................................. 182 17.4 Details of Cost Estimates .................................................................................................. 182 17.5 Estimated Cost Of The Project ........................................................................................ 184
18 FINANCIAL AND ECONOMIC EVALUATION ................................................................................... 200 18.1 General ............................................................................................................................. 200 18.2 Analysis Of The Major Assumptions ................................................................................. 200
18.2.1 Project Cost in Rs. Crores ......................................................................................... 201 18.2.2 Capital Structure in Rs Crores .................................................................................. 201 18.2.3 Debt Financing Terms ............................................................................................... 201 18.2.4 Plant Details .............................................................................................................. 201 18.2.5 Generation Details ..................................................................................................... 202 18.2.6 O & M ........................................................................................................................ 202 18.2.7 Working Capital ......................................................................................................... 202 18.2.8 Depreciation .............................................................................................................. 202 18.2.9 Tariff (Calculated as per CERC Norms) .................................................................... 202 18.2.10 Conclusion ............................................................................................................. 202
19 RECOMMENDATIONS ........................................................................................................ 203 19.1 General ............................................................................................................................. 203 19.2 Preliminary And Pre-Construction Works ......................................................................... 203 19.3 Recommendations ............................................................................................................ 204
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BIBLIOGRAPHY OF ABBREVIATIONS
Amp - Ampere
BIL - Basic Insulation Level
CEA - Central Electricity Authority
cfm - Cubic feet per minute
Cts - Current Transformers
Cumecs - Cubic metre per second
cum - Cubic metre
d/s - Downstream
DEM - Digital Elevation Model
DPR - Detailed Project Report
DVC - Damodar Valley Corporation
El - Elevation
EOT - Electric Overhead Travelling
FRL - Full Reservoir Level
GIS - Geographical Information System
GSI - Geological Survey of India
Ha-m - Hectare metre
HFL - Highest Flood Level
HPSEB - Himachal Pradesh State Electricity Board
HPPWD Himachal Pradesh Public Work Department
HRT - Head Race Tunnel
HT - High Tension
Hz - Hertz
ID - Internal Diameter
IDC - Interest During Construction
IRR - Internal Rate of Return
Km - Kilometre
LAVT - Lightning Arrestor and Voltage Transformers
LT - Low Tension
m - Metre
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MDDL - Minimum Draw Down Level
mkw - Metric Kilowatt
MVA - Mega Volt Ampere
MVAR - Mega Volt Ampere Reactive
MW - Mega Watt
MWL - Maximum Water Level
NJPC - Nathpa Jhakri Power Corporation
NLC - Neyvelli Lignite Corporation
NSL - Natural Surface Level
NTPC - National Thermal Power Corporation
OD - Outer Diameter
OPU - Oil Pressure Unit
PCC - Plain Cement Concrete
PCD - Pitch Circle Diameter
PFR - Pre-Feasibility Report
PLCC - Power Line Carrier Communication
PTs - Potential Transformers
Pu - Per Unit
RD - Reduced Distance
RITES - Rail India Technical & Engineering Services Ltd
RPM - Revolution per Minutes
sqm - Square metre
TWL - Tail Water Level
u/s - Upstream
UCB - Unit Control Board
XLPE - Cross Linked Polyethylene
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CHECK LIST SECTION-1 GENERAL AND HYDROLOGICAL
Remarks
1 Attach an index map (in the case of flood control scheme, the index map should show the flooded area for normal floods and the depth of flooding)
NA
2 Have hydrological meteorological and other data been collected in respect of following:
a) Map showing sub-divisions of catchment by tributaries, watersheds, rain gauge and temperature recording stations, gauge and discharge site, contour and isohyets.
Yes
b) Monthly and annual rain fall and temperature data for the catchment.
Yes
c) Average, maximum and minimum rainfall and temperatures.
Yes
d) Gauge and discharge data of tributaries and the main river.
Yes
e) Hydrographs of the river.
No
f) Maximum historical flood with hydrographs and designed maximum flood and its frequency.
No
g) Maximum, minimum and average annual run-off.
Yes
h) Hydrological studies to establish generally the availability of water for the benefits envisaged in the project.
Yes
i)
Suitability of water for irrigation, drinking etc. and treatment contemplated, where required.
N.A
j) Silt discharge, showing maximum, minimum and average silt intensities.
Enclose
k) The magnitude of the problem of soil erosion in the catchment area and the programme proposed for soil conservation measures.
Yes
l) Depth of sub soil water table in the command area and its seasonal variation.
N.A
m) Seismicity of the area.
Considered
3 Has basin wise development of the river been considered and the following information furnished?
a) A map showing the overall proposals for valley Yes
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development. b) Alternative proposals, discussing their merits and
demerits. Yes
c) Stages of development of the project and their salient features.
Yes
d) Extent to which the existing project will be assisted or affected.
N.A
e) Particulars of minor irrigation projects. N.A 4 Has reservoir data been collected completely and
the following information furnished?
a) Reservoir topography and area capacity curves.
N.A (Dam is not provided)
b) Probable rate of silting in the reservoir in comparison with silting of any existing reservoir.
N.A
c) Live storage, the numbers of years in that the reservoir completely fills, average annual utilization, evaporation losses, extra storage provided for carry from the year-to-year, if any.
Only Peaking Storage Contemplated
d) Working tables for the reservoir. N.A e) Flood absorption and flood routing. N.A f) Back water (tail water curves with bank levels). N.A g) Fetch of reservoir direction and velocity of winds
and free board. N.A
h) Malaria control. N.A i) Area to be submerged and its classification,
acquisition and compensation for land and properties.
18270sq-m (Artificial reservoir with all side closed boundaries)
j) Programme of resettlement of population displaced from the reservoir area
No displacement of Population
5 Head works (Weir)
Have the following aspects been discussed and shown on map.
a) Weir site and considerations leading to its preference over other sites.
Yes
b) Reservoir topography and area capacity curves. N.A c) Borrow area and quarries. Yes
d) Road and Railways existing and proposed. Yes e) Colonies, workshops and offices. Yes 6. Has a detailed survey map of the Weir site been
prepared showing the following?
a) All the natural features e.g. out-crops of rocks, springs etc.
Yes
b) Dam and appurtenant works Yes c) Site for construction plant e.g. crushing and
concreting plant, construction power plant, compressed air station etc.
Yes
7. Have geological investigations been made and a report showing the following submitted?
a) A brief account of regional geology, major rock types, effect of faulting etc. description of other structural features and their relation of water tightness and grouting proposals.
Yes
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b) Laboratory tests of samples of foundation materials and their interpretation.
Yes
c) Levels of ground water tables and discussions of percolation tests.
N.A
d) Reference to any special conditions affecting the preliminary designs.
Nil
8. Have the following Maps been included?
a) Combined topographical and geological map.
Yes
b)
Map showing bed map contours.
Yes
c) Logs of drill holes test pit exploratory tunnel etc.
Yes
d) Map profiles and station showing results of geophysical work or any other special methods.
Yes
e) Ground and aerial photographs, if available.
Ground Photographs
9. Have investigations of construction materials been made and report showing the following attached?
a) Various types of embankment materials e.g. pervious with quantities in various borrow areas.
Yes
b) Stone for riprap and rock fill. Yes c) Materials for stone masonry and concrete, fine and
coarse aggregates, with quantities and physical properties.
River borne material is to be used
d) Source of supply of cement. Yes e) Laboratory tests performed on item (a) to (d)
above. Yes
f) Haul roads for transport of construction material Yes g) Plan of borrows areas and quarries with trial pit
data.
Yes
10. Have the main structures and appurtenant works e.g. dam, spillway outlets, coffer dam etc been designed and the following appended?
a) General plan, upstream and downstream elevations showing natural ground levels, final excavation levels etc.
Yes
b) Foundation treatment and drainage.
Yes
c) Spillway and outlets with energy dissipation arrangements.
Yes
d) Maximum sections of overflow, non- overflow and earth dams.
Yes
e) Retaining and training walls.
Yes
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f) Galleries and other openings.
N.A
g) Gates, hoists and other control equipments.
Yes
h) Diversion works during construction etc.
Yes
i) Design calculation with list of assumptions made and factors of safety adopted, together with justification of the types of structures adopted.
Yes
SETION-II IRRIGATION
N.A
SECTION-III. POWER DEVELOPMENT
11. Have investigations been made and the following furnished?
a) Present position of power supply in the region, system load factor etc.
Yes
b)
Extent of firm power available from the scheme and also from the grid after commissioning of the plant (working tables and the basis of estimation of firm power should be supplied) .
Yes
c)
Load survey-giving details of major loads to be served, future peak and energy demands, anticipated system load factor.
Yes
d)
Proposed initial and ultimate installed capacities, number and size of generating units, numbers and capacity of turbines, power factor, efficiency etc. transformer capacity added at power station and sub-stations.
Yes
e)
Map showing the general layout of the schemes, including the dam, water conductor system, power house step up sub-stations and out-going transmission lines.
Yes
f) General map showing the transmission system, the location of the present /future principal loads.
Yes
g) Route miles of trunk and main line and distribution line with voltages under the scheme.
N.A
h) A note on the development of power in stages, if any.
N.A
i)
Proposed sources of coal, fuel etc and technical characteristic of fuel, costs per tonne and distance from location of power station to source of fuel.
N.A
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j) Have the coal commissioner and Railway been consulted in regard to supply to coal?
N.A
k) Proposed sources of cooling water
NA
l) Details of construction materials for hydro installations.
Yes
m)
In respect of distribution and rural electrification schemes, a list of small towns and villages (as per latest census) to be electrified.
N.A
SECTION-IV FLOOD CONTROL, DRAINAGE, ANTI WATER LOGGING
N.A
SECTION-V NAVIGATION, FISH CULTURE ETC.
N.A
SECTION-VI CONSTRUCTION PROGRAMME EQUIPMENT & MANPOWER
12. Has a construction programme been drawn up for the execution of the various components of the project with the following details?
a) Machinery and equipment available together with the proposed requirements.
Yes
b) The quantities or material involved together with the daily out-turn proposed for major items like masonry, concrete or earthwork.
Yes
c) Yearly requirement of cement, steel and other essential materials.
Yes
d) Synchronization in the construction of head works canal system including distributaries, minors and water course, field channels (by the beneficiaries) and implementation activities to ensure phase realization of maximum benefits
N.A
e) Synchronization of generation facilities with completion of transmission system.
Yes
f) Justification of the construction programme adopted.
Yes
g) Have charts been furnished showing the construction programme and targets diagrammatically for the various components of the projects?
Yes
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SECTION-VII ESTIMATE AND ANALYSIS OF RATES
Yes
13. Have project estimates of cost together with abstract of quantities and costs for various components of the project been made and following details furnished?
a) Estimated cost of the various stages of the project and the foreign exchange components thereof.
Yes
b) The year to which the rates adopted in the estimate pertain.
December 2014
c) Allocated costs of irrigation, power, flood control, navigation and other purpose served by the project, as considered equitable by the state Govt.
N.A
14. Have analysis of rates been made and following details furnished?
a) Labour out turns for various items
Yes
b) Material required for unit quantities of items of work.
Yes
c) The current schedule of rates in the area and rates proposed, comparison with rates obtained on similar works.
Item rates analyzed from first principle
SECTION-VIII FINANCIAL RETURNS AND BENEFITS
15. Has the financial aspect of the project been discussed and the following details furnished?
a) The phased or year wise programme of expenditure on the various units of the project, in foreign exchange and in rupees.
Yes
b) The phased or year wise programme of development of irrigation, power, navigation etc.
Yes
c) Present and proposed power tariff rates for different categories of consumers.
Yes
d) Compulsory irrigation cess proposed.
N.A
e) Scale of water rates proposed for the various N.A
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crops, comparison with rates prevailing on existing projects in the region/states.
f) Betterment levy proposed.
N.A
g) Comparison of above rates with the rates proposed for other projects in the state.
N.A
h) Comments of the state Revenue Department in regard to the rates of betterment levy, water rates compulsory irrigation cess, flood cess etc.
N.A
i) Statement of gross revenue from the different functions of the project.
Yes
J) Statement showing maintenance and establishment cost interest charges and net revenue.
Yes
k) Cost per Kwh of generation giving details of interest charges, depreciation and working expenses on which the estimate is based.
Yes
l) Capital cost per acre of annual gross irrigated area.
N.A
m) Productiveness of the project in terms of percentage of financial return.
Yes
i. At the end of the 10th year after completion.
Yes
ii. On full development.
Yes
iii. When the entire revenue from betterment levy anticipated has been realized.
Yes
n) Special grounds for undertaking an unproductive project and specific concurrence of the state finance department thereof.
N.A.
16. Have total direct and indirect benefits of the project been started in respect of the following?
a) Irrigation N.A
b) Power Yes
c) Flood control N.A
d) Navigation N.A
e) Employment Yes
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f) Other facilities N.A
SECTION-IX PUBLIC CO-OPERATION AND PARTICIPATION
17. Have the following aspects been discussed and information furnished?
a) The degree of public co-operation and participation expected for the project.
N.A
b) View and attitude of the beneficiaries about the advantage from the project and in respect of water rates betterment levy, irrigation cess etc.
N.A
SECTION-X INTERSTATE ASPECTS
a) Are the inter-state aspects involved? If so, the details about the same may be mentioned together with the latest views of the state concerned.
N.A
SECTION-XI EMPLOYMENT AND TRAINING
18 Have the following aspects been discussed and information furnished?
a) Yearly employment during construction (approx) by categories
Yes
b) Personnel required to be retained under above categories after completion of the project (approx)
Yes
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SALIENT FEATURES 1. LOCATION
State : Himachal Pradesh
District : Kinnaur
Stream : Tidong, a tributary of Sutlej river
Vicinity : Near Reckong Peo town.
Longitude : 78 22’ 10”E to 78 47’ 50”E
Latitude : 31 20’ 30” N to 31 33’ 30” N
2. HYDROLOGY
Catchment area at diversion : 497.86 km2
Design Flood (50 year Return period) : 405 cumec.
3. RIVER DIVERSION (During Construction)
Type : Diversion Channel
Length : 210.00m
Size & shape : 9m (W)x 2 (D), Rectangular
4. DIVERSION BARRAGE
A. Spillway
Type : Non Gated
Maximum Water level : 2889.40 m
Average river bed level at barrage axis : 2880.00m
Crest level of Spillway bays : 2881.75 m
Bridge deck level : 2890.40 m
No. of Spillway bays : 1
Width of bay : 20.0 m
Energy Dissipation System : Stilling Basin
B. Undersluice
Type : 2 Nos, Vertical Lift Gate(5m x 3 m size)
Maximum Water level : 2889.40 m
Average river bed level : 2880.00 m
Crest level of undersluice : 2875.50 m
Bridge deck level : 2890.40 m
Width of undersluice portion : 12.00 m
No. of undersluice bays : 2
Width of each bay : 5.0 m
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Energy Dissipation System : Stilling Basin.
C. Head regulator
Type : 2Nos.Vertical lift gates, 3.6 m x 4.35m
Maximum Water level : 2889.40 m
Average river bed level : 2880.00 m
Crest level of Head Regulator : 2877.40 m
Bridge deck level : 2890.40 m
No. of bays : 2
Width of bay : 3.6 m
Energy Dissipation System : Stilling Basin.
D. Tunnel Intake Structure
Type : Rectangular bell mouth entrance, Non
gated
Sill level : 2853.00m
Trash rack : Vertical (3 panels)
Design Discharge : 28.65 Cumecs
5. DESILTING BASINS
Type : Surface desilting basins
No. & Size of desilting trough : 2 Nos., 80.5 m x 9.50 m x 9.15 m
Particle size to be excluded : 0.20 mm and above
Design discharge : 35 cumec
Flow through velocity : 0.2 m/s
Flushing velocity : 6 m/sec.
Gates opening for flushing conduit : 2 Nos.Vertical lift gates, 2.5 m x 1.5 m
6. RESERVOIR
Capacity : 3 Hours peaking (265000m3)
FRL : 2873.75 m
MDDL : 2860.75m
Reservoir bed level : 2860.00m
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7. HEAD RACE TUNNEL
Type and Size
RD 0 to RD 2130
RD 2130 to RD 8409
RD 8409 to RD 8504
3.5m x 3.5m, Concrete Lined, D-shaped
3.5m x 3.9m, Concrete Lined, D-shaped
2.5m dia Circular steel lined
Velocity : 2.62 m/s & 2.32 m/s
Length : 8504 m
Design discharge : 28.65 cumec.
Slope : 1 in 162
8. ADITS
Type and Size : D – Shaped
To HRT (RD-2140) : Adit-1: 245 m long, 5.5m x 5.5m
To HRT, Surge Shaft & Valve house(At
junction of Surge shaft & Valve house)
: Adit-2: 180 m long, 5.5m x 5.5m
To Pressure Shaft (Intermediate Adit At El
2530)
: Adit-3: 186 m long, 4.5m x 4.5m
To Pressure shaft (upstream of
pressureshaft bifurcation.
:
Adit-4: 85 m long. 4.1m x 4.1m
To HRT (RD-242) :
Adit-5: 116 m long. 4.1m x 4.1m
9. SURGE SHAFT
Type : Underground, 2.5m dia riser. Concrete
lined with steel liner upto 2910 m.
Size: : 10.0m Dia., 110 m high.
Maximum Upsurge Level : 2903.00 m
Minimum Downsurge Level : 2825.00 m
Bottom Level : 2800.00 m
Top Level : 2910.00 m
10. PRESSURE SHAFT
Type : Underground
Size Main : 1 No., 2.5 m dia, 1145m long.
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Branches 3 nos.
For Branch-1 &2 : 2.5m dia 33m long,
1.75 m dia 23 m each, 1.2m dia 12m
each,
For Branch-3 : 2.5m dia 33m long, 1.75
m dia 40m long, 1.2m dia 12m long
Velocity : 5.8 m/s
Type & thickness of steel liner : Sumitten 610 F Grade, 18 mm to 54
mm thk.
Valve gallery : 13.0 m (H) x 10.0 m (W) x 10.0 m (L)
11. POWER HOUSE
Type : Surface
Installed Capacity : 150 MW (3 x 50 MW)
Size
: 80.3 m x 19.1 m
Maximum gross head : 615.31 m
Max Net head : 593.25 m
Min Net Head : 580.25 m
Rated Net head : 588.92 m
C/L of Turbine : 2258.44 m
Erection bay floor level : 2268.30 m
Crane beam level : 2278.65 m
Maximum TWL : 2252.00 m
HFL : 2250.00 m
Capacity of E.O.T crane : 120 tones
12. TAIL RACE CHANNEL
Type : Surface
Size : 5 m wide closed box channel, 100 m
long
Velocity : 1.90m/s
13. TURBINES
No. & Type : 3, Vertical Shaft Pelton.
Rated Power (at generator terminal) : 50 MW
Rated net Head : 588.92m
Max/Min net Head : 593.25 /580.25 m
Rated discharge : 9.55 cumec.
Speed : 500 RPM
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Specific Speed (wrt 10% overload) : 18.29 (m. kw)
14. MAIN INLET VALVE
Type : Spherical valve
Diameter : 1.2m
Location : In the power house
15. GENERATOR
Type : Vertical shaft synchronous generator
Number : 3
Rated Capacity : 55.55 MVA
Nominal Active Power : 50 MW
16. MAIN GENERATOR STEP UP TRANSFORMER
Location : Side wall of Powerhouse
No. of Single Phase Transformer : 10
Rated Output of Each Transformer : 22.5 MVA
Rated Voltage : 11 KV/220V
Frequency : 50Hz
Type of cooling : OFWF
17. GIS Hall
Size : 71.5 m x 14 m
Transformer Floor level : 2268.30m
GIS bay Floor level : 2277.30
Pothead Yard level : 2286.80
18. TRANSMISSION SYSTEM
Switchyard of Tidong-I Phase-II shall be located adjacent to Tidong-I HEP switchyard. Power of
Tidong-I Phase-II HEP shall be injected into Tidong-I HEP transmission system at Tidong-I HEP
switchyard.
19. ESTIMATED COST FOR PHASE-II DEVELOPMENT
Pre Operative and Civil Works : Rs. 39.89 Cr
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Electrical /Mechanical Works : Rs. 65.76 Cr
20. ESTIMATED COST- FOR TARIFF CALCULATIONs
Pre-operative Expenses : Rs. 15.80 Cr
Civil works : Rs. 24.09 Cr
Elect./Mech. Works : Rs. 65.76 Cr
Total Basic cost : Rs. 105.65 Cr
Escalations : Rs. 8.78 Cr
Interest During Construction & Financial charges
: Rs. 15.39 Cr
Total (Generation Works) : Rs. 135.01 Cr
21. POWER BENEFITS
Energy generation at 95% availability in
90% dependable year.
: 632.63 MU
22. FINANCIAL ASPECTS
Cost of generation in first year : 1.48
Average DSCR : 1.18
23. CONSTRUCTION PERIOD
For Phase-II development
: 2.0 years
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1 INTRODUCTION
1.1 GENERAL
Himachal Pradesh State Electricity Board (HPSEB) floated a Global Tender in 2004 for
allotment of Tidong -1 HEP in Kinnaur district of Himachal Pradesh and HPSEB allotted
Tidong-1 Hydro Electric Project to M/s Nuziveedu Seeds Limited, for investigation and
implementation of the project. The memorandum of understanding (MOU) for
development of this project has been signed between Nuziveedu Seeds Limited and the
Govt. of Himachal Pradesh on 23 September 2004. The MOU lays down the broad terms
to allow investigations and implementation of the project.
Prior to NSL’s takeover of the Tidong-1 Hydro Electric Project, Himachal Pradesh State
Electricity Board has carried out the initial field investigations of Tidong-1 Hydro Electric
Project as a part of Prime Minister’s initiative to develop 50,000 MW of Hydropower in the
country on a fast track. The preliminary project layout is prepared by HPSEB and is
indicated in the pre-feasibility report made available to the developer. As per this report, a
gross head of 608m and a rated discharge of 19.2m3/s are utilized to generate 100 (2x50)
MW of power and 414.15 MU of energy in a 90% dependable year.
In order to finalize the layout of various project components, Nuziveedu Seeds Ltd (NSL)
had started the work of detailed geological investigations and appointed RITES Ltd for
carrying out site investigations. The geological exploration has been carried out by RITES
included drilling, testing and logging at penstock alignment and power house area,
geophysical investigation by seismic refraction and resistivity survey; photo-geological
remote sensing studies, rock mechanic tests & Petrographic analysis, construction
material survey and testing to assess alkali-silica reactivity; property survey for storage
reservoir, submergence and communication surveys. The socio-economic studies for
Environmental Impact Assessment studies have also been entrusted to M/s RITES Ltd, a
government of India undertaking.
Partial Hydrological observations at diversion site have been done by HPSEB from 1995
to 2004. Discharge is being measured by NSL at the proposed intake from Dec 2004
onwards and the data is available up to date.
Based on a conceptual layout of development, topographical maps of the project area
were prepared and geological mapping done. The project layout is prepared based on
detailed topographical surveys. The survey for diversion barrage, desilting basin, storage
reservoir, intake, colonies, plant areas has been done to the scale of 1:500. The survey
for Head Race Tunnel covered a strip of 75m on either side of tunnel alignment. The
Pressure Shaft alignment was surveyed to the scale of 1:500 with a contour interval of 2 m
in a strip of 75 m on either side of the entire length of the penstock. The Powerhouse,
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Switchyard, TailRace and access tunnel areas have been surveyed to a scale of 1:500
with a contour interval of 2 m.
After studying various proposals, it was decided to locate the barrage with crest at EL
2881.75m downstream of confluence of Tidong Khad and Lamber Khad. The water shall
be conveyed through a head race tunnel of about 8.5 km long, surge shaft,
inclined/horizontal pressure shaft and a surface power house on the left bank of Tidong
river.
The project features were optimized based on the comprehensive analysis of
topographical, geological, hydrological data and alternative studies of project layout,
preliminary design features, broad parameters of cost and financial analysis etc. The
construction planning and cost studies have been carried out as per the final layout
adopted in this report.
The DPR (for two units of 50 MW each) was prepared accordingly and has been approved
by HSPEL vide letter no: HPSEB: (Sectt) 401 – TEC/Tidong-I/50 42034-47 dtd
23/07/2007. Nuziveedu Seeds Limited has formed a special purpose vehicle ”NSL Tidong
Power Generation (P) Ltd.” for implementation of this project. The implementation of
Tidong -1 project with an installed capacity of 100MW (2x50MW) has been taken up and
the work is in the final stage of completion and project commissioning. The present status
of the project work is mentioned below.
Excavations for Spillway, sluiceway and diversion channel and slope protection
works are completed, and Concreting works are partly completed.
Excavations for Head Regulator & Desilting Basin are almost completed, and
Concreting works for head regulator is under progress.
Excavation works at Storage Reservoir area and gravity wall location is completed
and concreting of gravity wall is under progress.
Underground excavations of all construction adits are completed.
Excavation of 95 % of Head Race Tunnel is completed and 10 % of concrete lining
is completed. Mud mat concreting is under progress in different faces.
Underground excavation of pilot shaft for surge shaft is completed, and widening of
the surge shaft is to be commenced.
Excavation of Valve house is under progress.
Excavation of underground pressure shaft is completed and fabrication and
transportation of pressure shaft ferrules is under progress.
Excavation for Power house & service bay area and slope protection behind power
house area are completed. Concreting of Service bay area is completed and super
structure like columns and beams upto roof level has been completed. In machine
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hall area, concreting of raft at turbine floor has been completed and concreting of
walls on either side of powerhouse area upto generator floor has been completed.
In view of significantly higher river flows in monsoon period, the possibility of increasing
the installed capacity of Tidong-I HEP has been explored by the Project Developer. NSL
Tidong Power Generation (P) Ltd has carried out discharge measurements in Tidong
River from Dec, 2004 to Dec, 2014 and based on detailed hydrological studies including
study of discharge pattern in adjacent Baspa basin. It is seen from the results of this study
that one additional unit of 50 MW capacity can be added to existing power house based
on techno economic consideration. The details of this study are presented in this report.
1.2 PRESENT STUDY FOR ADDITIONAL UNIT OF 50 MW OF TIDONG –I, PHASE - II
During implementation of the project, NSL started various other activities like acquisition of
land, clearance from the forest department, preparation of tender document etc. Most of
these activities were completed by 2008, and the development of infrastructure work
commenced in 2009. All these activities took almost 3 years to complete.
Simultaneously discharge measurements have been also carried out at diversion site
since December, 2004. Presently, about 10 years of actual measured flow data of Tidong
khad available for hydrological study. However, in DPR for Tidong -1 HEP having installed
capacity of 100 MW, the power potential study was done based on hydrological flow
series developed from Baspa river flow and one year measured river discharge data of
Tidong.
While analyzing the ten years of measured discharge data, it is observed that significantly
higher monsoon period flows are available in the river as compared to river flow estimated
at the time of DPR preparation. In view of the higher values of actual flow measurement,
the feasibility of increasing the installed capacity, with an additional unit of 50 MW, has
been studied. It is observed that adequate space for placing the new unit of 50 MW is
available in the land already acquired for existing surface power house.
1.3 PROPOSED SCHEME
The Phase - I project layout involves the construction of a diversion barrage with river bed
El 2880m, under sluice, reservoir to store 265000m3 of water to provide peaking
generation of 4 hour during lean season, head works, desilting basin to remove silt
particles above 0.2 mm in size, 8.5 km long head race tunnel, 10m diameter surge shaft
with a height of 110m, 1145 m long and 2.5 m diameter steel lined pressure shaft (partly
inclined and partly horizontal), surface power house having installation of two high head
Pelton type generating units each of 50 MW capacity with compatible generator and other
auxiliary equipment, and tail race channel. The project proposes to utilize about 610.977
m of maximum gross head and a rated discharge of 19.2 m3/s for power generation. The
energy benefits were assessed at 414.15 Gwh in 90% dependable year.
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For Phase –II, existing civil works at barrage, head regulator, desilting tank, storage
reservoir, HRT, pressure shaft are proposed to be utilized. Existing surge shaft will require
increase in finished diameter from 8m to 10 m. For installing the third unit in phase – II of
project, a new machine hall bay will be required adjacent to Unit 2 of existing power
house. Control room building of existing units will be used for the new unit also. The net
energy generation considering 95 % plant availability in 90% dependable year is
estimated as 632.63 MU.
Power evacuation arrangement as finalized with HPPTCL involves construction of
16.50km long 220 kV D/C transmission line from Tidong to Kashang. This arrangement
has been confirmed by HPPTCL vide their letter No.: HPPTCL//Tidong-I/CORR/09/1229
dated 06/09/2009 and later modified vide their letter no MPP-F(2) -9/2007-IV dated
11.10.2013. The same power evacuation arrangement is considered adequate to carry
the additional unit of 50 MW of power in phase – II.
The project cost for Phase – II works is estimated as Rs. 135 Cr. and the project shall be
completed in a period of 24 months, after obtaining all clearances and financial closure.
Power shall be sold to HPSEB or any of the utilities in Delhi, Chandigarh, Haryana, Punjab
or other states in Northern India.
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2 PROJECT SUMMARY
2.1 GENERAL
The Tidong Hydro-Electric Project has been envisaged with the purpose of exploiting the
potential in the lower reach of Tidong khad. The project involves the construction of an
Ungated spillway, Gated undersluice, Head Regulator, Desilting Basins, Storage
Reservoir and a 8.504 km long Head Race Tunnel culminating in under ground Surge
Shaft. A pressure shaft partly inclined and partly horizontal will convey the water to the
surface powerhouse. The power house will accommodate two nos. Pelton Turbines 50
MW each in phase – I, and one additional unit of 50 MW is proposed to be added in phase
II of project development.
In Detailed Project Report, submitted in 2006, the project was anticipated to generate
414.15 Gwh with 100 MW installed capacity in a 90% dependable year (2004). With the
updated hydrological series, the project is expected to provide annual energy generation
of about 539.43 Gwh in phase – I with 100 MW, and about 632.63 GWh in phase – II with
150 MW in a 90% dependable year (2004-05) with 95% plant availability. During lean
seasons, the project shall also provide peaking capacity benefits of 100 MW for about 4
hours per day in phase – I, and 150 MW for about 3 hours per day in phase – II of project
development.
The project works for phase – I are in advanced stage of completion of construction and
commissioning. The project development in phase – II is expected to be completed in a
period of 24 months from zero date. The infrastructure facilities available in phase - I will
be used and are mostly found to be adequate for construction of the phase II. Tidong-1 in
Phase – II is techno-economically viable and its early execution is planned for reducing
the gap between availability and demand of power in the Northern Region of the country.
The phase – II of the project development is likely to be commissioned by February, 2019.
2.2 MAIN COMPONENTS
The project envisages construction of following structures in phase-I and phase II
development:
2.2.1 Diversion works
A barrage comprising of two sluice bays of 5.00 m width each and an ungated spillway of
20.00 m width is constructed. The barrage is designed to pass design flood of 405 cumecs
in Tidong Khad at High Flood Level (HFL) of 2889.4m. The crest levels of undersluice
and spillway bays are kept at El 2875.50 m and El 2881.75 m respectively. All works are
completed in phase - I development, and no modification is required during phase II of
project development.
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2.2.2 Head Regulator
The Head Regulator is located on the left bank of the Tidong Khad, just upstream of the
diversion barrage, and is designed to draw a maximum flow of 35.00 m3/s. Two bays of
3.60 m clear width each having crest at El. 2877.40 m are provided in the head regulator.
Two regulating gates are provided to control the flow to the desilting chamber. All works
will be completed in phase - I development, and no further change is required during
phase II of project development.
2.2.3 Desilting Basin
The desilting basin comprises of two longitudinal chambers, each chamber having a
length of 80.50 m and width of 9.50 m, with a 2.50 m wide longitudinal flushing trench at
the bottom. A 1500mm dia silt flushing pipe is provided at the end of the flushing gallery
to convey the silt from desilting basin, back into river. The desilting basin is designed to
remove silt particles of size to 0.2 mm and above for the discharge corresponding to the
phase II of project development. All works will be completed in phase - I development, and
no modification is required during phase II of project development.
2.2.4 Reservoir
The reservoir is designed to meet the storage requirement for peaking demand of four
hours in phase – I of the project development in the lean season. The total storage
capacity provided in the reservoir is about 265000 m3. The available storage is sufficient
for peaking demand of three hours in phase – II of the project development. The bed level
of reservoir is kept at El 2860.00m, and MDDL is provided at 2860.75m considering
sufficient submergence depth to the tunnel intake. FRL of the reservoir is kept at El
2873.75m and top of the reservoir walls at El 2875.00 m by giving free board of 1.25m. An
overflow section is provided in the reservoir to spill water above FRL. The desilted water
from desilting chambers will be impounded in the reservoir. Silt particles of size below 0.2
mm are likely to get silted in reservoir, thus reducing the reservoir capacity over a period
of time. For efficient functioning of reservoir, suitable desilting arrangements are provided
in the form of sediment flushing pipe with a butterfly valve type control gate. No
modification in reservoir arrangement is proposed in the phase – II of the project
development.
2.2.5 Head Race Tunnel
From the reservoir, the water would be conveyed through 8.504 km long Headrace tunnel
drawn from intake structure located at the downstream end of the reservoir. At the entry,
the intake has been provided with a smooth transition to a D-shaped Headrace tunnel. A
trash rack structure is provided in front of the intake to avoid the passage of floating debris
into the tunnel along with an intake gate. The size of the D shaped tunnel between RD
0.00 m to RD 2130.00 m is of 3.50 m, and the size from RD 2130.00 m to RD 8409m is of
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3.5 (W) x 3.9 (H). The stretch from RD 8409 to 8504 m will be provided with 2.5 m circular
shaped.
The tunnel invert level at the HRT intake is El. 2853.0, m and that at the the surge shaft
junction is EL. 2800 m. The tunnel is provided with a bed slope of 1 in 162. Three
intermediate adits are provided to facilitate construction of HRT. These adits meet the
main HRT at RD 242.00m, RD 2140.00 m and RD 8474.00m respectively. All works of
HRT will be completed in phase - I development, and no modification is required during
phase II of project development.
2.2.6 Surge Shaft
At the end of the HRT, a vertical circular surge shaft is provided to absorb the transient
pressure variations due to changes in power load. The surge shaft is at offset of about
11.00 m from the junction of HRT and Pressure Shaft. This offset acts as a restricted
orifice for the surge shaft to minimize the water fluctuations in addition to the initial 2.50m
vertical opening in surge shaft at the time of load rejection and sudden load acceptance.
With increase in design discharge in phase – II of project development, the finished
diameter of the existing surge shaft will require increase in diameter from 8.00m to 10.00
m. The surge shaft has a total height of 110.00 m from top to bottom with a provision of
riser of 2.50 m diameter between EL 2800.00 m to 2820.00 m.
2.2.7 Valve House
Downstream of the Surge Shaft, a pressure shaft protection Butterfly Valve of 2.50 m
diameter is provided. The valve will be housed in an underground cavern having a width
of 10.00 m and a length of about 10.00 m. A 180.00 m long adit is provided at El.2800.00
m to approach the valve house. The adit is being used for excavation of HRT during
construction for phase-I of the project. All works related to valve house are nearly
completed in phase - I development, and no modification is required during phase II of
project development.
2.2.8 Pressure Shaft
A steel lined Pressure Shaft of 2.50 m inner diameter is provided downstream of the
Surge Shaft. The excavated sizes of pressure shaft at inclined portion and horizontal
portion are 3.10 m dia circular and 3.40 m dia D-shaped respectively. The pressure shaft
has a inclined length of 326.00 m at 55º inclination to horizontal line between El 2801.75
and El 2534.51, followed by a horizontal length of 187.00m. Thereafter, length of 294.00
m is provided at an inclination of 55o between El 2525.14 and El 2284.40, and then a
horizontal length of 310.00 m is provided upto powerhouse. For construction of Pressure
shaft, an intermediate Adit-3 of 186.00m long at El 2530.00 m is provided. Another access
is provided to the bottom of Pressure Shaft through adit - 4 of 85.00 m long at El. 2257.00
m.
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In phase I of project development, the single 2.50 m diameter pressure shaft bifurcates
into two unit penstocks of 1.76 m diameter each to feed the two Pelton Turbines of 50
MW. The length of the 2.50 m dia main pressure shaft upto the bifurcation is about
1145.0m and the length of unit penstock for machine 1 and 2 is 70.00m. Under phase II of
project development, it is proposed to provide T branching of about 33.00m upstream of
earlier bifurcation point, to feed the third unit. The alignment of pressure shaft for third unit
will follow the alignment of adit- 4 to bottom of pressure shaft. This arrangement will thus
eliminate the necessity of any excavation for pressure shaft for unit - 3. The length of
pressure shaft for unit 3 from bifurcation point to power house will be about 85.00 m.
2.2.9 Power House Complex
The power house is located on the left bank of Tidong khad about 150.00m upstream of
its confluence with Sutlej River. The overall dimension of the powerhouse, including the
space requirement of additional bay proposed in the phase – II of the project
development, is 80.30 meters long and 19.10 meters wide. Units 1&2 will be installed in
phase – I, and unit – 3 is proposed to be installed in phase – II of the project development.
The units 1 & 2 are spaced at 15.00 meters C/C, while units 2 & 3 are spaced at 27.00
meters.
A Transformer cum GIS hall is proposed upstream of the Power house building and it shall
house 10 nos of 26MVA single phase Transformers and Gas Insulated Switch yard (GIS).
The size of the Transformer cum GIS hall is proposed as 14m (W) x 71.5m (L) x 18.5m
(H) and shall be located at EL 2868.30m. A 300mm thick concrete fire wall is proposed to
separate each Transformer. GIS hall has been proposed at EL 2277.30m along with
control room building. The control room building shall accommodate Electrical Room,
Battery Room, Mechanical Workshop, Control Room, and HVAC unit Room.
2.2.10 Tail Race Channel
The tail water from Unit – 1 & 2 in phase – I of project development passes through two
tailrace ducts and merges into a common tailrace channel. The tail water from unit-3 is
planned to merge the common tailrace channel separately. The common tailrace channel
of 5.00 m wide rectangular shaped, having a length of about 100.00 m, conveys the tail
water back into Sutlej River.
2.3 TRANSMISSION SYSTEM
Switchyard of Tidong-I Phase-II shall be located adjacent to Tidong-I HEP switchyard.
Power of Tidong-I Phase-II HEP shall be injected into Tidong-I HEP transmission system
at Tidong-I HEP switchyard.
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2.3.1 Power Benefits
The gross energy benefits from the project have been assessed as about 632.63 Gwh per
annum in 90% dependable year after ecological release as per requirement viz. 15% of
minimum flow. The project would afford peaking capacity benefits of 150 MW for about
three hours per day during lean season.
2.4 PROJECT COST
The project is estimated to cost Rs. 135 Crore at December, 2014 price level including Rs.
15.39 Crore as interest during construction & financial charges. It is proposed to finance
the project on a 70:30 debt: equity basis.
2.5 FINANCIAL ASPECTS
As per GOI norms the average cost of unit generation (for first five years) with 15.5%
return on equity (ROE) works out to Rs. 1.48 and average DSCR as 1.18 (Rs./kwh).
Assumptions for carrying out financial analysis are summarized in chapter-18, Financial
and Economic Evaluation.
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3 SOCIO-ECONOMIC SCENE OF HIMACHAL PRADESH
3.1 GENERAL
Himachal Pradesh is a small hilly state, geographically located in the north-western part of
the country. It is surrounded by four states, namely, Uttarakhand, Punjab, Haryana and
Jammu & Kashmir with Tibet on the eastern side. Himachal Pradesh is among the most
advanced socio-economic states and has shown promising growth over the years. Over
the last decade the strong agro-based economy has shifted towards services, particularly
Tourism. The state is sparsely populated and endowed with natural attractions, Tourism is
one of the key contributors to the state’s income. Some of the tourist attractions include
Tribal areas, Mountaineering, Winter sports like skiing, besides a large number of pilgrim
centres. It is a hub for domestic and foreign tourists.
The state is largely an agro-based economy with about 71 per cent of its population
dependent on farming, horticulture and livestock for their livelihood. The main crops are
wheat, corn (maize), barley, rice and potatoes revenue from Apple crops in the main
resource for the people and Government . It is one of the leading fruit and vegetable
producing states in the country. The State Government has steadily been focusing on
improvement of industrial infrastructure.
A slew of industrial parks and estates including export-oriented parks for agro-processing
units have been set up, thus, strengthening the agriculture sector in the state. Several fruit
and food processing units and other allied industries like warehousing and packaging
have come up in various parts of the state. The state’s agro-processing units have highest
per capita output and value addition in the country.
Himachal Pradesh has one of the highest levels of telecom penetration in the country. The
state has a well-developed banking sector with a high density branches. It has the highest
Hydel power generation potential in the Northern region of the country and has fostered
private sector participation in the sector.
The Government of Himachal Pradesh has formulated its policies with an objective to
improve the industrial sector in the state. It has initiated many welfare programmes to
improve the economic well being of its people. The state provides special package of
incentives to the investors and ranks highest on the incentives index. The state enjoys a
healthy investment climate with the presence of several domestic and multinational
corporations.
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3.2 PEOPLE, CULTURE AND RELIGION OF HIMACHAL PRADESH
3.2.1 The People
The population of HP consists of a medley of tribes, all speaking their own language.
Some of them are the Gaddis, Gujjars, Kinnauris, Lahulis and Pangwalis. The majority of
the people are of Aryan stock, with exceptions like the inhabitants of Lahaul and Spiti who
are distinctly of Mongol origin. Perhaps the most exotic among them are the Kinnauris,
known for their extraordinary beauty and ornate jewellery.
The Earliest Inhabitants
Before the coming of the Khasha Aryans were the Kols and Mundas. These people are
represented by the various scheduled castes like the Kolis, Halis, Chamars, Darains,
Rehars, Chanals, Lohars, Baris, Dagis, Dhakis or Turis, and form a considerable part of
the population.
The great social fusion over the centuries, a process which is still going on, has resulted in
many changes in the appearance and characteristics of these people. As such, like the
rest of Northern India, they are ascribed to Aryan blood by mainstream historians.
The present day the Kinnauras do not constitute a homogenous group and display
significant territorial and ethnic diversity. For a better understanding of ethnic and cultural
distribution, the Kinnaur District may be classified into three territorial units.
Lower Kinnaur comprises area between Chora at the boundary of the Kinnaur District with
Rampur Bushahr and Kalpa including Nichar and Sangla valleys. The people of lower
Kinnaur are mostly Hindus though the ethno-historical factors have resulted in some
Buddhist influence.
The middle Kinnaur is the area between Kalpa and Kanam including Moorang tehsil. The
people of middle Kinnaur are of mixed racial strain. The inhabitants are Buddhist as well
as Hindus. Many people have faith in both the religions.
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The upper Kinnaur comprises of remaining north-eastern part of the district i.e. the area
between Pooh and Hangrang valley extending upto international border with Tibet.
However the people of Hangrang valley are almost universally Mongoloids. They mostly
follow Mahayana Buddhist religion. The project site falls under this zone.
HP is the least urbanized of states in India, and so there’s an ‘untouched’ simplicity about
its inhabitants. Living in a world of their own, the people are sometimes quite unaware of
what’s happening in the rest of the country. Their whole life seems to revolve around high
peaks, near-accessible passes, rivers and deep valleys. All this makes for people who are
essentially simple, honest, god-fearing and firmly rooted in the bedrock of the past. Ninety
percent of the people live in distant ‘fairy tale’ villages and small towns, and depend on
agriculture for their livelihood. Many also rear sheep, goats, and other cattle.
3.2.2 The Dress
The people of distinct dress in mostly woolen clothes. Their clothing is well suited to the
climate and is artistic too in its own distinctive way.
Head dress of men and women is a round woolen cap called thepang in the local dialect.
It is generally of light grey or of white colour with a colour velvet band on the outer fold.
Band of green colour is most liked. Crimson blue, yellow etc. may also be worn.
Men wear woolen shirts called chamn Kurti made of woolen cloth and tailored in the
village. Another type of dress which the men wear is Chhuba. It is long woolen coat
somewhat resembling an Achkan. A sleeveless woolen jacket worn outside the Chhuba.
Men wear woolen churidhar pajama.
Women wrap up a woolen shawl like garment called dohru. The first wrap of dohru is on
the back with embridered border displayed throughout its length up to the heels. Darker
shades of colours are preferred for dohru. Besides beautiful coloured shawls are also
worn by them over their shoulders. Choli a sort of full sleeves blouse is worn by the
women. Some of them have decorative lining also.
However, now a days wearing of cotton/synthetic salwar, kammez, pants and shirts have
become popular among the young Kinnauras. The traditional footwear worn by the
Kinnauras were made of wool and goat hair with sole of goat hide. However, with the
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passage of the time the indigenous shoes have almost disappeared and wearing of
readymade shoes is in vogue.
3.2.3 Houses and Equipment
The traditional village house of Himachal has a rather interesting structure. The lowest
storey is for household cattle, the middle for storing grain (also doubles as sleeping room
for the family in winter) and the top floor or dafi forms the living area.
The housing pattern of upper Kinnaur is different from that of lower Kinnaur.
In the lower Kinnaur the houses are two storied and built of stone and wood. These are
either slated roofs or having flat roofs made of layers of bhojpatra (tree bark) covered with
earth. The door is often folding and opens inwards.
In upper Kinnaur the houses are usually built of stone. These are flat roofed and covered
with earth. They are ill-built on account of the scarcity of wood. The houses are two storied
and doors are small. The ground floor is used as cattle shed and upper storey for living
purposes. The size and plinth area of the house depends upon the site available for
construction. The houses are white washed in lower as well as upper Kinnaur. Besides
these traditional houses, now RCC houses built in modern designs are also coming up.
Usually the households have some wooden chest for keeping grain and dried fruits. In
addition most of the houses have separate wooden grain storage structures locally called
'Kathar'. Khayarcha is a mat used for sitting purposes, which is made of goats hair. Pakpa
which is skin of sheep or goat or some wild animal as often placed on khayarcha for
sitting. Traditionally the people used to use utensils made of brass, bronze and aluminum.
However, nowadays with the increased outside contact they are fast adopting the china
crockery and utensils made of stainless steel.
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3.2.4 Cuisine of Himachal Pradesh
No discussion about people and culture is complete without giving due mentioning of its
cuisine. The preferred taste in Himachal varies from region to region. Non-vegetarian
food, with a generous dose of spices like cardamom, cinnamon, cloves and red chillies, is
very much the norm. The average Himachal kitchen churns out all sorts of meat, lentil and
cereal preparations.
Simple Eating Habits
However there may be local variations. For instance, in the barren regions of Kinnaur and
Lahaul-Spiti, there is more emphasis on locally-grown coarse grains like buckwheat, millet
and barley. In areas with a pastoral tradition, milk and its products are liberally used in
cooking. Himachalis are not particularly fond of vegetarian fare and till recently tubers like
potatoes and turnips were all they ate in the name of vegetables. Green vegetables,
however, are increasingly finding their way into Himachali kitchens. While the everyday
meal is the usual dal-chawal-subzi-roti (the common north Indian meal of rice, lentil broth,
dish of vegetables and bread), special dishes are cooked during festive occasions.
Famous Sidu is a kind of bread made from wheat flour. It is kneaded with yeast and the
dough is allowed to rise for 4-5 hours. With a stuffing of fat it is first browned over a slow
fire and then steamed. Sidu is normally eaten with ghee (clarified butter), dal (lentil broth)
or mutton. In many parts of the state, ankalos made of rice flour are a festive dish. In the
dry Lahaul-Spiti valley, the leaves of buckwheat are mixed with wheat flour and made into
cakes called aktori. Patande (a sort of pancake) is a specialty in the Sirmaur area.
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3.2.5 Religion
More than 95% of the population of HP is Hindu but Buddhism has also made inroads in
to the state thanks to the nearness to Tibet and presence of the Dalai Lama at
Dharamsala.
The ashen valleys of Lahaul, Spiti and Kinnaur are made brilliant by the Buddhist way of
life.
At times the demarcation between Hinduism and Buddhism is very faint in these hill
regions. For example, the rituals of the Kinnauris are a mix Buddhist and Hindu practices.
The hundreds of gompas and monasteries here serve as a veritable library for the student
of Buddhism. No wonder HP is said to be God’s Own Country.
There are also several notable churches and Sikh gurudwaras in the state. Christianity
came in with the British, of course, who dashed to these mountains whenever the heat of
the plains got to them. Shimla, Kasauli and Dalhousie served as the most important British
retreats, and so have the most well known churches of the state. St-John-in-the-
Wilderness in Dharamsala is also quite an attraction.Sikhism, too, is practiced in a few
places in Himachal. Paonta Sahib in Sirmaur district is a major pilgrimage for Sikhs, and
so is beautiful Manikaran in the Kullu Valley. The Sikhs played an important role in the
history of Himachal and Guru Govind Singh, one of the ten founders of the religion, began
his career on this very land.
3.2.6 Monasticism
Kanet boys, who learn the Tibetan scriptures and are well versed in Buddhist doctrines,
are called Lamas. Similarly the Kanet girls, who do not marry, but devote their time to the
study of Tibetan scriptures are called Zomos or Jomos. They live in nunneries. The two
principal nunneries are at Kanam and Sunnam and in these a great numbers of Zomos
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live. Besides this, almost every village had few Zomos. The Lamas live in the monasteries
and are looked upon as very holy. In fact they are the priests of all the Kanets. There are
several monasteries of these Lamas in Kanam, Sunnam and other villages. Lamas are
either Gyolong or Celibate like the Brahmchari or Dugpu, who marry but never shave. The
head Lama is consulted with regard to important undertaking.
3.2.7 Festivals
Festivals and fairs form an integral part of the culture of Himachal Pradesh. These
festivals are full of religious rites and cultural practices that the Himachalis assert in the
best of their abilities. It is the time of fun and frolic; people wear colorful dresses and
engross themselves in dancing and singing. Apart from celebrating all other Indian
festivals , few local festivals too are observed with the same vividness and festivity. Some
heralds the arrival of seasons. Sikh festivals namely Baisakhi and Lohri and few festivals
of tribal communities are celebrated here.
The culture of Himachal Pradesh incorporates zestful festivals and fairs. The tourists from
all over the world participate in the festivities. In the second week of December, the
International Himalayan festival is held in Dharamshala. Diwali is feted throughout the
state. The Lavi fair is famous in Himachal and it is observed for three days on the Sutlej
riverbanks. At Sirmaur, the effigies of Parasuram are plunged in the Renuka Lake. The
people of Himachal Pradesh, especially Shimlaites are celebrating Christmas since the
British domination. Lahaul observes a special festival called Cheeshu. The Lahaul Festival
is also held near Keylong. Haryali is a famous festival observed in Kangra region of
Himachal Pradesh and Sirmaur. Shravan Sankranti takes place in Nahan in July. The
renowned Naina Devi fair, in Bilaspur also occurs during the month of August.
3.2.8 Music and Dance
The Himachalis are fond of dance and music and these are key elements of culture of
Himachal Pradesh. The songs and performing dances are spiritual in nature and mainly
used to invoke gods and goddesses during festive seasons. Himachal is racy in folk music
and till date no classical music has initiated. However, special kind of songs namely
Samskara song are grounded on ragas which belong to the genre of Indian classical
music. The war songs sung by the Himachalis Jhanjhotis too have the similar originations.
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Ainchaliyan are the famous religious songs, buzzed at the bride`s house. All the females
present at the residence of an unmarried girl sing it with the completion of wedding
ceremony. The dancer is called jhoomar. In the Kullu region of Himachal, Laman songs
are quite famous.
The musicians carry various instruments like Flute, karna, Ranasingha, Turhi, Ektara,
Kindari, Jhanjh, Manjara, Chimta, Ghunghru and Ghariyal during their gala musical
performance.
Famous dance styles are Naati, Kharait, Ujagjama and Chadhgebrikar (Kullu), Shunto
(Lahaul & Spiti) and Dangi (Chamba). In Sirmaur and Mahusa regions a woman dances in
high spirits and the whole lot of audience are totally enthralled by her vivacious
performance.
3.2.9 Language
Thanks to the many tribes – each with its own language and dialect – Himachal boasts of
more than 60 dialects. These are Chambyali, Pangwali, Lahauli, Kinnauri and so on. In
places with a Buddhist population, Tibetan is the language.
But the state’s main language is Pahari, a derivation from Sanskrit and Prakrit, which is
largely unintelligible to plain dwellers. Hindi is also spoken widely and is the language of
instruction in schools. With Himachal’s close proximity to Punjab, Punjabi is the medium of
communication in some places.
3.3 GEOGRAPHICAL FEATURES OF HIMACHAL PRADESH
3.3.1 Location
Himachal Pradesh is situated between 300 22' 40” to 330 12’ 20” north latitudes and 750
45' 55" to 790 04’ 20” east longitudes. The altitude in the Pradesh, a wholly mountainous
region in the lap of Himalayas, ranges from +350.00 metres to+ 6975.00 metres above
mean sea level. It is surrounded by Jammu and Kashmir in the north, Tibet on north east,
Uttarakhand in the east/south east; Haryana in south and Punjab in south west/west.
3.3.2 Climate
Himachal Pradesh can be divided into three regions: - (i) The Shivalik ranges (the height
from plain upto 915 metres); (ii) Colder Zone (the height is 915 m to about 4500 metres);
and (iii) the Axis and Crystalline core of the whole system (the height above 4500 metres
but below 5500 metres).
The climatic conditions, therefore, vary from the semi- tropical to semi-artic.
Physiographically, the state can be divided into five zones based on altitudes and
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moisture regime conditions. These vary from wet humid sub-temperate situation to dry
temperate alpine high lands.
Besides the seasonal variations, the climate of Himachal Pradesh varies at different
altitudes. The average rainfall is 152 cms (60 inches). The highest rainfall occurs in
Kangra district followed by Shimla district.Temperature varies from -40C to 310C.
3.3.3 Hills
Himachal Pradesh (HP) ‘the Mountain State’ is a complex mosaic of hills, lush valleys and
snow-clad peaks. It straddles the Himalayas from the foothills, over peaks, to the valleys
of Lahaul and Spiti. The prominent ranges which curve across the state are the Shiwaliks,
Pir Panjal, Pangi, Zaskar and Dhauladhar. The highest peaks are Shilla (7,026m),
Manerang (6,597m) and Shipki (6,608m). The hills rise gradually from the south to the
north of the state – the outer Himalaya or Shiwaliks, the Lower or Lesser Himalaya, the
Main or Great Himalaya and Trans or Tibetan Himalaya.
3.3.4 Valleys
Much of HP can be easily divided according to its many lovely valleys. Lahaul and Spiti
stretch from the Chandra Valley in the northwest to the Lingti Valley along the Spiti River.
The Chamba and Kangra valleys lie on either side of the mighty Dhauladhars, while the
remote Pattan Valley is separated from Chamba by the Pir Panjal. Kullu Valley stretches
from Mandi to Manali, and the Parbati Valley obviously follows the Parbati River. The
Malana Valley is quite an interesting place, supposed to be the oldest democracy in the
world.
3.3.5 Glaciers, Rivers & Lakes
The many glaciers above the snow line feed the fast flowing rivers of Himachal Pradesh.
In fact, the whole of the Himalayas is like one mammoth reservoir of snow. The Beas
Kund glacier near the famous Rohtang pass in Kullu is the mother of the Beas. The other
biggies are the Bara Shigri, the largest glacier in Lahaul valley, the Bhadal Glacier, the
Bhaga Glacier and the Chandra Glacier. Alpine pastures spring up around them in
summer turning the place into a picnic spot for migratory graziers.
Life moves at a gentle pace in Himachal, but not the rivers; they are always in great hurry.
In the furrows between the many ranges rush the perennial rivers that drain the snow
slopes off the crests. The major rivers, criss-crossing the roughly square Himachal, are
Beas, Chenab, Spiti, Sutlej, Ravi and Yamuna.
The Beas originates in the Pir Panjal range near the Rohtang Pass and flows some 256
km in Himachal. The river is formed by a number of tributaries, the important being the
Parbati, the Hurla, the Sainj, the Uhl, the Suheti, the Luni, the Banganga and the Chaki.
The Chandrabhaga or Chenab is the largest river (in volume of water) formed after the
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meeting of 2 streams, Chandra and Bhaga at Tundi, in Lahul. The river flows a distance of
122 kms and has a catchment area of 7500 sq. km in Himachal, before entering Kashmir.
The Ravi originates from Bara Banghal (Kangra district) as a joint stream formed by the
glacier fed Bhadal and Tantgari. The river flows a distance of about 158km and has a
catchments area of about 5451sq. km.
The Satluj is unique, the only river in HP to rise from beyond the Himalayas. It begins as
the outflow from the sacred lake of Rakas Tal in southern Tibet, and enters Himachal
through a notch in the Zaskar Range at Shipkila. Passing through precipitous gorges and
narrow valleys it emerges from the mountains at Bhakra. The catchment area of Sutlej in
Himachal is 20000 sq.km.
The river Yamuna originates from Yamunotri in Uttar Kashi (Uttar Pradesh). Its total
catchment area in Himachal is 2320 sq.km. Its main tributaries are the Tons, the Giri and
the Bata.
Most of these rivers join the Indus River system which flows into the Arabian Sea. Dams
have been constructed over them at many places to exploit their enormous hydel power
potential. The Bhakra Dam on the Sutlej has created Govind Sagar, the largest lake in the
region. Come monsoon and numerous waterfalls and gurgling streams gush out from
every nook and corner of the land. Apart from these dancing brooks, there are hot water
sulphur springs at Manikaran and Vashist which are a balm for tired limbs.
The major lakes of Himachal Pradesh include Renuka, Rewalsar, Khajjiar, Dal, Beas
Runoff for a long duration storm ( 24 hrs) for hilly region is given by R=0.6H1.2 where, R= Runoff in inches H= Aerial rainfall in inches
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For aerial rainfall of 24 hr duration and 50 year return period, H=149.40 mm
=5.89 inches R=5.03 inches
=127.88 mm Average loss rate per hour = 0.897mm per hr Aerial rainfall of 50-yr return period and 6.96hr duration= 30.03 mm = 1.18 inches Maximum runoff excess of 6.96hr duration is given by Qtc= 10508.40 Cusec
Peak flood hydrograph due to rainfall excess of 1.18 inches and duration of 6.96 hrs= 12433.3
Cusec Taking adjustment factor for the effect of temporal distribution of rainfall excess of 1.075 Peak flood hydrograph excluding base flow = 13365.9 cusec = 378.21cumec Adding base flow @ 5.0 cusecs per sq mile with entire catchment contributing,
Evacuation of power from Kashang-I (65 MW), Kashang-II (65 MW) and Tidong-I
(100 MW) is discussed above. With the commissioning of other stages of Kashang
and Tidong, the power shall be injected at Jangi pooling station. The Jangi Pooling
station shall be established by this time frame. Transmission scheme for Kashang &
Tidong shall be as given as below:
° Kashang-Jangi Pooling Station 220 kv D/c line (Single HTLS- Equivalent to
300 MW capacity) – Proposed Implementation as STU network
° 2x315 MVA (7X105 MVA units) 220/400 kV GIS Pooling Station at Jangi (with
4000 Amps. Switchgear) (with space provision for 3rd ICT) - Proposed
Implementation as ISTS
° LILO of one ckt. of Shongtong – Wangtoo 400 kV Line at Jangi - Proposed
Implementation as ISTS
° Tidong – Jangi Pooling Station 220 kV D/C line - Proposed Implementation
as STU network
Note: After coming up of Kashang III & Tidong-II and its inter-connection with Jangi
Pooling Station, the Kashang-Bogtu 220 kV Line has to be kept in open condition.”
11.4 IDENTIFICATION OF TRANSMISSION SYSTEM
As per CEA Master Plan and Minutes of 30th SCM dated 19.12.11 the evacuation from
Tidong-I HEP in temporary and final evacuation arrangement is at 220 kV level.
Accordingly, the Switchyard at Tidong-I HEP is designed for Power Evacuation at 220 kV
voltage level.
Since the Tidong-I Phase-II HEP (50 MW) shall be located adjacent to Tidong-I HEP (100
MW), switchyard of Tidong-I Phase-II HEP can also be located adjacent to Tidong-I HEP
switchyard to facilitate injection of power from Tidong-I Phase-II HEP (50 MW) into
Tidong-I HEP switchyard.
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11.5 POWER EVACUATION FROM TIDONG-I PHASE-II HEP
The facility that is being created by laying the 16.5 Kms of 220 D/c line from Tidong-I HEP
to Kashang Bhaba through LILO is adequate to carry the power generated through
Phase-II installation of 50MW .As such no other facility need be created.
11.6 STATUS OF OPEN ACCESS/ CONNECTIVITY
Approval for Grid connectivity and Long Term Open Access from STU & CTU for Tidong-I
phase II HEP (50 MW) will be sorted out for after getting Techno Economic Clearance
(TEC) for the Project.
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12 INFRASTRUCTURE FACILITIES
12.1 GENERAL
Tidong khad joins Sutlej river near village Rispa/Morang at an elevation of about 2244m.
Morang is located about 325 km from Shimla and is accessible through National Highway-
22. The Powerhouse site is located near village Rispa. An approach road to Rispa village
is available on the left bank of Sutlej. The nearest broad gauge railway station, is Kalka
on the Northern Railway which is about 400 km from the project site.
The project is located on the left bank of Tidong khad. The diversion site is located at an
elevation of 2880.00 m, downstream of the confluence of the Lambar khad with Tidong
khad. The barrage site is located in a steep valley with exposed bed rock available on left
bank of Tidong khad. Right bank is covered with the overburden and rock is exposed at
higher elevation only.
An approach road is constructed by HPPWD for connecting Moorang with Lambar village
on the right bank of Tidong khad. This road passes through the diversion site. Permanent
approach to diversion barrage is planned by constructing about 100 meters long branch
road from PWD road. This road is extended by 2900m to inlet face of Adit-1 to Head
Race Tunnel via Plant area cum muck dump yards.
Powerhouse is just located upstream of the confluence of the Tidong khad with Sutlej
river. Permanent approach roads to powerhouse, surge shaft, construction adits and
muck dumping yards are made.
For the efficient & economical execution of the project, adequate construction facilities like
project roads, colonies & construction power etc. are already in position for project
execution in Phase – I which would be sufficient for phase II also.
12.2 ACCESS ROADS AND STRENGTHNING OF EXESTING ROADS
To approach the various major components and construction sites, The following project
roads and bridges are constructed.
A 6.00 m wide and 2.46 km long approach road to power house which takesoff
from PWD road.
A bridge across Tidong khad at power house site.
An approach road of 6.22 km long to reach Surge shaft and Adit- 2 and Adit-3.
Two temporary bridges across Tidong khad at barrage site.
Approximately 100 m long approach road to connect Barrage site from HPPWD
road.
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A 2.9 km long approach road to provide access to adit-1.
Strengthening of bridges on Sutlej river wherever required.
Besides the above main roads, access roads/paths/mule paths are also be provided as
per the requirements of construction. These include:
Approach path to explosive magazines, road to crusher and aggregate processing
plants, batching and mixing plants, contractor’s staff and labour camps, stores,
sheds, workshops, plants etc.
Colony roads.
Haulage roads for removal of excavated muck to fill plant cum dumping areas.
Temporary residential colony near the power house site and at village Lambar for
the staff deployed for the construction supervision of power house, auxiliary works
and diversion works respectively.
The approach roads to reach permanent colony are constructed as permanent roads
while other roads are temporary roads
The permanent colony near Power house has a well equipped medical center as also a
recreation center, telephone exchange etc. Colony is built with Prefab structures using puff
panels which are thermal resistant. This colony has following facilities:
Potable Water Supply arrangements.
Sanitation and sewage disposal arrangements
Drainage arrangements
Internal roads and cross-drainage works
Electrical supply
Fencing and Security
Medical facility
All above facilities are proposed to be used for project development under phase – II
without any need for additional infrastructure.
12.3 TELE-COMMUNICATION
Telecommunication link between powerhouse, barrage and the project is provided by
connecting these places by extending the existing telephone network of Post and
Telegraph Department, through the nearest P&T exchange.
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An internal automatic telephone exchange (EPABX) with 50 lines capacity for the project
is provided. All important sites of work, offices and residences of senior officers are
connected by telephone.
The powerhouse and permanent colony near Power house is also provided with VHF
wireless link to keep contact with other power stations and substations in the grid. The
powerhouse shall ultimately be connected by carrier communication system.
12.4 CONSTRUCTION POWER
The construction power for execution of phase – I works is taken from available HPSEB
supply lines at the powerhouse, surge shaft and barrage sites. The power distribution
lines from these sites are laid by the Project Authorities. The contractors, engaged on the
construction of various project components, are supplied power at one point where it can
be metered. The power distribution lines for carrying power to various places of work are
installed by the contractors themselves.
In addition to power from HPSEB grid, One DG set of 1010 kVA at Powerhouse site and
Two 1010 kVA capacities at Diversion site are installed and distribution is laid for
supplying at all the working sites.
12.5 EXPLOSIVE MAGAZINE
The arrangement for storage and transportation of explosives required for the drilling and
blasting operations is made by the contractors themselves.
12.6 INFRASTRUCTURE FOR PHASE – II WORKS
All infrastructure works developed for executing project works under Phase – I
development for 2 x 50 MW power house are considered adequate for phase – II
development also. No additional cost is likely to be incurred for infrastructure works under
phase II of the project.
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13 CONSTRUCTION METHODOLOGY & EQUIPMENT PLANNING
13.1 GENERAL
Construction work on various components of civil works in Phase-I development is under
progress. It is proposed to utilize the same methodology for working at site for small
quantum of work required for the installation of third unit.
Status of Phase-I civil works:
Excavations for Spillway, sluiceway and diversion channel and slope protection works are completed, and Concreting works are substantially completed.
Excavations for Head Regulator & Desilting Basin are almost completed, and Concreting works for head regulator is under progress.
Excavation works at Storage Reservoir area and gravity wall location are almost completed and concreting of gravity wall is under progress.
Underground excavations of all construction adits are completed.
Excavation of 95 % of Head Race Tunnel is completed and 10 % of concrete lining is completed. Mud mat concreting is under progress in different faces.
Underground excavation of pilot shaft for surge shaft is completed, and widening of the surge shaft is to be commenced.
Excavation of Valve house is under progress.
Excavation of underground pressure shaft is completed and fabrication of pressure shaft ferrules is under progress and erection will commence shortly
Excavation for Power house & service bay area and slope protection behind power house area are completed. Concreting of Service bay area is completed and super structure like columns and beams upto roof level has been completed. In machine hall area, concreting of raft at turbine floor has been completed and concreting of wall in powerhouse area upto generator floor has been completed.
The civil engineering works required for the installation of additional 3rd unit to be carried
out in Phase I
Surge shaft of required diameter is planned to be constructed in Phase-I works.
The excavation and rock support in unit pressure shaft-3 is planned to be
completed under Phase-I works.
The other works associated to unit-3 and planned to be completed in phase-II are
Civil Works associated with fabrication and erection of unit pressure shaft for the 3rd unit.
Excavation at Power House Building. Minor Civil works in Tail Race.
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It is estimated that the additional works required for the commissioning of 3rd unit will take
about 24 months from the zero date.
13.1.1 Surge Shaft
The additional works required in surge shaft for the 3rd unit are planned to be completed
under Phase-I. The excavation of surge shaft is in progress at site and the methodology
planned under Phase-I works shall be adopted for the construction of surge shaft.
13.1.2 Unit-3 Pressure Shaft
The excavation and rock support in unit pressure shaft-3 is planned to be completed
under Phase-I works and the methodology planned under Phase-I works shall be adopted
for the excavation & rock support of unit-3 pressure shaft. Civil Works associated with
fabrication and erection of unit pressure shaft for the 3rd unit is planned to be taken under
Phase-II. The methodology adopted for fabrication and erection of ferrules under Phase-I
work shall be adopted for Phase-II works.
13.1.3 Power House and other outlet structures
13.1.3.1 Construction Methods
Main activities to be undertaken for the addition of 3rd unit of power house complex are
surface excavation, concreting along with erection of Electro-Mechanical and Hydro-
mechanical equipments. Surface excavation will comprise of common excavation in
overburden and rock excavation.
The sequence of operations for power house complex is based on the following
construction methods and equipments:
Excavation and loading of the soft material by 1.5 Cum Hydraulic excavators
assisted by 180 hp bulldozer.
The unit 3 area of Power House pit rock excavation may have to be carried out by
Rock breakers to avoid any disturbance to the concreting and equipment already
erected for unit I & II. The area excavated may have to be filled up with the same
muck
The E&M works in Power House will be taken up in parallel to civil works after the first
stage concrete in Power House is completed. The civil contractor will co-ordinate with the
agencies supplying E&M equipments and provide them all necessary support at site.
Block outs and first stage embedment shall be provided in various structures during first
stage concreting. The supply and installation of all E&M equipments required at different
fronts shall be ensured to be completed in time so that the Power House works can be
completed in scheduled time.
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14 CONSTRUCTION SCHEDULE
14.1 GENERAL
It is proposed to utilize the same methodology of Phase-I work for working at site for small
quantum of work required for phase II installation of the third unit. The project area is
situated in extreme winter conditions therefore the working season is limited to 9 months,
beginning from March to November. It is estimated that the additional works required for
the commissioning of 3rd unit will take about 24 months from the zero date.
The civil engineering works involved for the additional 3rd unit are:
Surge shaft of required diameter is planned to be constructed in Phase-I works
only.
The excavation and rock support in unit pressure shaft-3 is planned to be
completed under Phase-I works.
The other works associated to unit-3 and planned to be completed in phase-II are
Civil Works associated with fabrication and erection of unit pressure
shaft for the 3rd unit.
Excavation at Power House Building.
Minor Civil works in Tail Race.
In order to achieve the benefits from the scheme at the earliest possible time, a suitable
phasing of expenditure of various component works consistent with the resources
expected to be available, is made. It is expected that it will be possible to complete the
additional works in a period of 24 months from day of the commencement of work (zero
date). A bar chart showing the approximate schedule of construction is given in
Appendix -14.1. It is proposed to mechanize all construction activities by deployment of
appropriate equipments for the timely completion of the works associated to 3rd unit.
The delivery schedule of the various generating equipment and their accessories and
other related equipments, their erection and commissioning has been planned to
synchronize with the construction schedule of civil works, so that the TG set will be put
into operation as per the programme chalked out.
The scheduled time for commissioning of 3rd unit is February 2019
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APPENDIX – 14.1
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15 PROJECT ORGANIZATION
15.1 GENERAL
The project spreads over a length of about 10 km along the left bank of Tidong khad
starting from Lambar village to Rispa village.
The construction in phase – I of project development has been supported by relevant
infrastructure works such as permanent and temporary colonies, offices, roads and
bridges, workshops etc., all situated within the project area, and the same infrastructure
facilities will be used to complete the phase –II of project development.
The phase – II of project development is planned to be completed in a period of 24
months.
The construction of the phase II of project development is proposed to be carried out
through contracting agencies entrusted with suitable contract packages. Following
packages have been envisaged for the civil and E&M works:
Powerhouse complex and its associated works including pressure shaft and tail
race channel.
Hydro-mechanical works including fabrication and erection of steel liner for
pressure shaft.
Turbine, Generator, Spherical valve and other associated auxiliary equipment.
It is also proposed that works related to preparation of detailed designs, technical
specifications and construction drawings for various components of the project would be
executed through a separate contract package by a competent consultant.
Keeping in view of the difficult hilly terrain in which the project is located and the quantum
of design and construction work involved, very close coordination would have to be
maintained to avoid time and cost over-runs. The organization of the project has,
therefore, been planned keeping the above in view and is presented in the Organization
Chart. Broad features of this organization structure are described in the following
paragraphs.
15.2 PROJECT ORGANISATION
The works would be looked after by a specific unit sets up for the purpose under the
overall control of a Project Manager for the overall management of the project. All
engineering disciplines and project services would be accountable to the Project Manager
stationed at Rispa, the Project Headquarter. The Project Manager would be assisted by
separate wings to look after the planning, material procurement, construction
management, quality control, Public relation, financial and accounts aspects of the project.
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Organisation chart showing seven wings to be handled by Project Manager (Head
Quarter) is indicated in Figure-15.1. The organizational set up outlined above will be
supported by the necessary support staff.
Organization for Peak Construction Period
The proposed organization for peak construction period will comprise of the following:
Project Manager, responsible for overall execution of the project.
Four DGM/AGM level Senior Managers, for Quality Control, civil, planning &
monitoring, Geology and Electrical/Mechanical works. One Asst .General Manager
will take care of each of the major civil construction components of surface works ,
tunnel and power house complex. One Manager (Electrical) and One Manager (
Mechanical) for the Power house works of the E&M equipment including stores
are proposed. Required number of supporting staff (Assistant manager, Engineer,
Assistant Engineer and junior engineer) will work under the supervision of each
Manager in-charge.
One Financial Adviser along with necessary complimentary staff for ensuring
proper financial control.
One Senior Manager with necessary complementary staff to look after personnel &
administration, public health, liaison work, security, medical etc.
One Public Relations officer
The above mentioned officers shall be overall in-charge of their respective wings and shall
function as an integrated team, every member of which will not only be conversant with his
duties and responsibilities, but will also get necessary report/feed back regularly from his
respective Division for taking timely corrective measures wherever required, for achieving
targeted completion of the project. Each Division will have technical and secretarial
supporting staff as per requirement.
Project organization chart proposed for peak construction period is given in Figure-15.2
15.3 FUNCTIONS AND RESPONSIBILITIES OF PROJECT TEAM MEMBERS
15.3.1 Senior Manager (Civil)
He will be responsible for the construction of additional bay in powerhouse required for
Unit – 3 proposed in the phase – II of the project development. He will be assisted by one
manager (Civil) in execution of these works.
Manager (Civil): The manager in-charge will take care of the construction of pressure
shaft, Surge shaft and additional bay for unit – 3 in power house and its associated works
including tail race channel.
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15.3.2 Senior Manager (Quality control)
He will be responsible for organizing all testing of materials and quality control for the
entire civil works and would also be in charge of upkeep and maintenance of all
laboratories. For this purpose, he will be assisted by a team of assistant manager,
engineers, assistant engineers and junior engineers
15.3.3 Senior Manager (Electrical and Mechanical Works)
One manager (Electrical) and one manager (Mechanical) will assist the senior manager
along with the required number of assistant manager, engineers, assistant engineers and
junior engineers for executing the following works for Electrical/Mechanical Works:
Power house electrical and mechanical works.
Switchyard and Transmission lines,
Procurement of Stores and equipment
Material management
Construction and running of workshops
Communication and Transport
Inspection and maintenance of field machinery and
Construction power.
Stores
Manager (Electrical): He will be responsible for execution of all electrical and mechanical
works pertaining to the powerhouse complex as well as construction power requirement.
Manager (Mechanical): He will be responsible for procurement of material equipment,
material management, maintenance of stores, construction and running of workshops,
communication and transport, inspection and maintenance of field machinery etc.
These managers will assisted by a team of assistant manager, engineer, assistant
engineer and junior engineers for performance of their duties.
Geology: Any and all the excavations, protection works for underground and surface
works will be taken by DGM level specialist in Geology
15.4 NEED BASED UNITS
The number of units headed by the senior managers as proposed above, are based on
the functional and physical requirements of works. The works have been so distributed
that appropriate progress is achieved for critical items of works without affecting progress
on other works.
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Senior Managers shall execute works in a manner that all items including critical items of
work are completed on schedule to ensure timely commissioning of the project.
15.5 PROJECT PLANNING AND MONITORING
Senior Manager will be assisted at Project Headquarters directly by a Project manager
along with one manager in carrying out the functions of monitoring the progress of works,
co-ordination and liaison with various agencies, safety aspects etc.
15.6 FINANCE & ACCOUNTS
The Project Manager will have a Financial incharge (F.A.) supported by two Accounts
Officer (AO) attached to his office to support the work of accounts , costing regular and
work-charged staff establishment etc.
15.7 PROJECT ADMINISTRATION
Regarding project administration including maintenance of colonies, running of schools
and dispensaries, public relations, welfare , security etc., the Project Manager will be
assisted directly by a Senior Manager (Administration) posted in his office. The Senior
Manager (Administration) will be assisted by a Security officer along with supporting staff
to look after the vigilance and security aspects of the project areas.
The organization structure will be reviewed and firmed up as part of the detailed planning
in the pre-construction stage.
M/s NSL Tidong Power Generation (P) Ltd. will ensure adequate review of project
activities, give financial and administrative approvals and render policy guidance to the
Project Manager of the project. Support from M/s NSL will help the Project Manager in
taking expeditious decisions regarding award of contracts to competent contractors,
procurement of materials and posting of staff etc.
The project management shall function as a fully integrated team dedicated to the
implementation of the project. Every member of the team shall report regularly to his
officer-in-charge and shall be subject to review of his performance.
While the Project Manager assumes responsibility for all aspects of the project, his
deputies have to ensure that their reports etc. reflect up to date status of the project at that
point of time. They would periodically review the progress of works, identify the problem
areas suggest remedial measures, see through the implementation of such measures,
and have a realistic forecast of the status of the project in the intermediate time frame.
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To achieve the above objective the Engineers shall ensure that they and their personnel
are interacting regularly on a day-to-day basis with all the concerned personnel of the
project whose work has a direct impact on the progress of their own work, and take
corrective actions, wherever called for, to adhere to work schedule.
15.8 TECHNICAL ADVISORY COMMITTEE
A technical advisory committee comprising of renowned international experts shall be
constituted by M/s NSL. This committee will advise the project team through Project
Manager on all critical aspects of project planning, design and construction activities.
15.9 CONSULTANTS
The Project Manager may utilize the services of Technical Consultants who will assist and
advice the project authorities on all aspects of the project implementation including
engineering design, logistics, costs and schedules, planning, construction and quality
control. The consultants will submit a monthly report indicating the work programme,
progress to date, status of drawings, problem areas and ways and means for solving the
same.
15.10 REPORTING / REVIEWS
The project will be subject to monthly reviews so that all concerned are aware of progress
to date. The monthly report will give details of manpower, productivity, materials ,logistics,
schedule and costs. The purpose of these reviews will be to highlight the problem areas
and provide the required additional supervision and action to resolve the problem. The
reports will be prepared using inputs from consultants, contractors, construction
supervisors, procurement officers etc., so that a realistic picture of the project is available
for review and report.
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Tidong-I Phase-II HEP Detailed Project Report NSL Tidong Power Generation Pvt. Ltd. 16. Environmental & Ecological Aspects
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16 ENVIRONMENTAL & ECOLOGICAL ASPECTS
16.1 GENERAL
NSL Tidong Power Generation Pvt. Ltd. (TGPL) is constructing the run-off the river Hydro
Power Project of 2 X 50 MW on Tidong Khad a tributary of Satluj river AS Phase-I. The
project has obtained Environmental Clearance from MoEF vide letter no. J-
12011/35/2007-IA-I dated 7/9/2007. (Copy of the environmental clearance letter is
enclosed as Annexure-XIV-1).
The detailed hydrological study conducted recently indicates that the flow condition of the
Tidong Khad has a potential to generate more power. The required water flow of 28.60
cusecs with 90% dependability is available which can generate 50 MW more power. NSL
TPGPL is proposing to expand the existing power generating capacity from 100 MW to
150 MW by installing third unit of 50 MW. The excess water which is available in the khad
will be utilized for expansion project. The 15% of the lean flow will always be maintained
in the khad to comply with the condition of Environmental Clearance.
The design components of the existing project like spillway, under sluice, desilting
chamber, Head Race Tunnel, Surge shaft, Pressure shaft etc. have adequate capacity to
generate additional 50 MW capacity. Therefore this additional 50 MW power generation
can be achieved without any change/modification in the existing design. Only one Turbine
and Generator of 50 MW capacity shall be installed in the area adjacent to the existing
units in the power house. This will improve the cost per MW of power and benefit the
nation.
The installation of Unit 3 will be located within the project area and no additional land is
required.
NSL TPGPL will adhere to the environmental conditions as approved in TEC and maintain
15% of the lean flow in the river downstream of the intake during operation of the project.
The observations made in the earlier EIA studies indicate that there are no aquatic life in
the Tidong Khad.
16.2 SUBMERGENCE
As only diurnal storage is envisaged, no submergence is involved. The water will be
diverted through the spillway and no land will be submerged.
No habitation will be affected due to the implementation of the expansion project and there
will not be any displacement of any population and loss of cultivated land.
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16.3 EFFECT ON CLIMATE
The project layout and planning ensure no submergence and impoundment of water that
could influence the microclimate of the region, there will be no effect of the project on the
climate.
16.4 CATCHMENT AREA TREATMENT
There is no change in the catchment area to the spillway site. Therefore the Catchment
Area Treatment (CAT) plan prepared earlier stands good. CAT plan was prepared and
approved by the Forest Department. Subsequently, NSL TPGPL has deposited Rs.
7,24,00,000/- to Forest Department for implementation of CAT plan.
16.5 SEISMICITY
The project area lies in the Himalayan Region and is susceptible to earthquakes. The area
as per ISI classification falls in seismic zone V. Proper seismic co-efficients have already
been taken into consideration during design stage of the project.
16.6 REHABILITATION
The installation of 3rd unit is located within the area of project under construction and no
additional land is required. Therefore the land acquisition and displacement of the
habitation is not envisaged.
16.7 OTHER PREVENTATIVE MEASURES
16.7.1 Restoration of construction areas and disposal of muck
All the construction areas are properly planned so as to merge the project in the natural
surroundings after completion of the construction work. There will not be any additional
muck generation in the proposed expansion project since all the components of the
project under construction are adequate and no more extra excavation/construction work
is needed. The muck is being stacked systematically at the muck dump area approved by
HPPCB.
16.7.2 Anti Poaching Measures
Proper training is being given to all the construction labour and project staffs and educated
in terms of environmental concerns and relevant anti poaching laws.
16.7.3 Environmental Impact and Mitigation Measures
The environmental impact which occur as a result of construction activity of spillway,
intake structure, desilting tank, head race tunnel, pressure shaft, power house, road
construction, housing and dumping of excavated material etc., are already considered in
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the existing project under construction and necessary mitigation measures are being
implemented. Since there is no additional construction work with very little excavation
involved for the expansion project, no additional impacts are envisaged. The mitigation
measures, which are being implemented, are adequate.
Further, there is no additional land requirement for the expansion project and
consequently there will be no adverse social impact on the nearby habitation.
NSL TPGPL is committed to release 15% of the lean flow at any given time in the Tidong
Khad to preserve the aquatic life.
A summary of environment management plan, which is under implementation, is given as
under:-
The EIA study has established the fact that the Tidong Khad is not a biologically
rich area and no fishe were observed. However, we have already deposited Rs.
1.11 crore to Fishery Department, Bilaspur to improve and conserve the biological
life of the Tidong kahd.
Catchment Area Treatment plan has been prepared and approved by the Forest
Department. The amount of Rs. 7,24,00,000/- have been deposited to forest
department for the implementation of CAT plan.
Compensatory afforestation scheme has been prepared by the Forest Department
and Rs. 2,66,76,610/- are deposited for the implementation of the same.
Environmental Monitoring Plan has been prepared and monitored by HPPCB. The
amount of Rs. 25.02 Lakh is already paid to HPPCB for the same.
Local Area Development Fund of Rs. 6,41,40,000/- has been paid to LADA for
development of infrastructural facilities in the affected villages.
16.8 BENEFITS
One of the main reasons for promoting hydroelectric schemes is their environmentally
friendly character. This form of energy, unlike the energy from other conventional sources,
entails no discharge of wastes or emission of toxic gases. It is virtually free from pollution
and is therefore looked as “technology of the future” for the rural and remote areas. The
generation of energy at low cost will help in reducing the demand for fuel wood and will
help in reducing the global warming impacts. This is renewable energy and Eco-friendly.
The expansion of the project by adding 50 MW will help to reduce the overall cost of
power generation resulting in the lower tariff, which would benefit the people, state and the
country at large.
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NSL TPGPL has implemented CSR activities in surrounding villages like Lamber, Thangi,
Rispa and Moorang etc. in addition to funds deposited to LADA. Further, many local
persons have got the employment in the project. NSL TPGPL has awarded many petty
contracts to local people. This has benefited the local population in improving the socio-
economic condition.
16.9 CONCLUSION
The Phase-II of the Tidong I HEP is being taken up without acquiring any further land nor
raising any further structures either in the surface or sub-surface works, not affecting any
habitation, no displacement of population, no submergence, cause no pollution etc.
Phase-I of the project was accorded the Environmental Clearance by MoEF based on the
detailed environmental assessment study. Further Environment Impact Assessment for
the Phase-II project is not required since there is no land acquisition.
ECOLOGICAL ASPECTS OF HYDRO-ELECTRIC PROJECT
1.01 Detailed basic information affecting the environment.
The project consists of a spillway, desilting tank, head race tunnel, surge shaft, pressure shaft, power house etc. All these components are being constructed for the project under construction and the design of these components are capable to accommodate additional 50 MW expansion project. No additional construction is required for the expansion project.
Thus the expansion project does not have any adverse effect on the environment.
02 Break up of submerged area total submerged area of the reservoir.
The capacity of all the components of the project under construction are adequate for the installation of 3rd unit of 50 MW. Therefore, the question of submergence does not arise. There is no requirement of additional land.
Forest land Nil
Cultivated land Nil
Shrubs & fellow Rocky Output Nil
Wetland Nil
Open water other use Nil
03 Forest type in catchments and submerged areas.
Nil
Extent and nature of forest to be cut for construction of roads, colony and other appurtenant
Nil
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works.
04 Duration of Project construction
24 months
05 Estimated peak labour strength
Skilled / Technical 200
Unskilled / Non-Technical 600
Labour to be recruited from affected population.
No population would be affected by the expansion project. Local labour is being recruited as per the requirement. However, local population has been given the employment in the existing project under construction.
Skilled
Unskilled
.06 Population density in the area per sq. km.
60 persons per sq. km. (Dist. Kinnaur)
07 Number of villages and population to be displaced.
No displacement of population of the village.
No. of villages. Nil
Size of village. Not applicable
Affected families in each villages Not applicable
Occupation of the affected people.
Not applicable
Agriculture Nil
Industrial labour Nil
Forest based Nil
Owner cultivators by size of land holdings.
Marginal (1.0-2 hect.) Not applicable
Small (1.0 –2 hect.) Not applicable
Medium (2-5.0 hect.) Not applicable
Big (Over 5.0 hect.) Not applicable
08 Resettlement
Is a rehabilitation committee being constituted.
Resettlement is not involved.
Existing guidelines, if any for compensation in cash and kind.
Nil
Number of ousted families likely to be settled in new settlement.
Nil
Size of the proposed new settlement.
Nil
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09 Layout plans/master plans for new settlements.
Nil
Distance of new settlements from the present habitat.
Nil
Number and type of facilities Approach road and paths (e.g. school, post offices, for the project area bank, approach road drainage and water supply etc., proposed to be provided).
Nil
10 Is the affected area covered by development programmes like IED, SED, Drought prone area, tribal development etc.?
No
11 Any proposal to provide or create employment for oustees; nature and quantum of employment to be provided.
No oustees under expansion project. However, land oustees under the project under construction have been given the employment.
12 Wind at Dam site (diagram giving statistical information concerning the direction and speed of the wind at the site.
Predominant wind direction in the morning and evening are NE and SW respectively.
Hurricane, tornadoes, cyclones. : Nil
13 The depth of ground water table : Potable
Maximum : Not applicable
Minimum : Not applicable
Quality of ground water potable/non potable/fit for irrigation/industry.
: Potable
14 Present ground water use pattern in the command area under irrigation.
: Not applicable.
15 Based on the experience of similar project in the area, specify the interaction between the altered surface water patterns and underground aquifers and their recharge.
: Not applicable
00 ENVIRONMENTAL STATUS
01 Indicate known pollution sources in the region (indicate the Industrial like chemicals, textiles and other thermal power units, mining operations etc.).
: None
02 Indicate the industrial and other development project likely to be
: None
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taken up in the area during the next five to ten years.
03 Does the area support economically viable aquatic life, fish and crocodiles?
: No
Are there any fish/crocodiles breeding ground in the river tributaries in the submergence?
: No
04 Does the site contain a wild life (including birds) habitat, breeding area, feeding area, migration route including the number of wild life available in the area.
: No
05 Is the site potential wild life sanctuary?
: No
06 Specify any rare or end-angered species of flora and fauna in the affected area along with their approximate number and measures to salvage/rehabilitate them.
: No
07 Is the area a tourist resort? : No
08 Are any monuments/sites of cultural, historical, religious, recreational importance including wild life sanctuaries, national park etc. likely to be affected by the proposed project. If so, details thereof.
: No
09 Does the proposed area suffer from endemic health problems due to water/soil borne diseases.
: No
00 ENVIRONMENTAL IMPACTS
01 What measures are planned to develop the site to enhance its aesthetic aspects (i.e. recreation and water sport facilities and picnic sites etc.)
: Not proposed,
02 Will the project help in flood control, reduction for even eradication of flood havoc downstream?
: No
03 Are any changes in water salinity expected? If yes, give details of proposed measures to counter act this.
: No
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04 Are problems of water logging envisaged in the command area? If so give details of proposed steps to combat the problem.
: No
05 Will the reservoir be used for fisheries development, fish culture as well as fish breeding, crocodile, farming etc? if yes, give details thereof.
: No
06 Will fish ladder/lift and like arrangements be provided to allow movements of import-ant migratory fish population?
: Not applicable
07 Measures proposed to prevent grazing the cultivation on reservoir slopes to avoid erosion and premature silting up the impoundment
: Not applicable
08 Will any important natural resources (minerals, coal, timber etc.) be lost or their use precluded because of the presence or operation of the project? If yes, specify the resources estimated loss.
: No
09 What is potential loss in aquatic production on site up and down stream, fish and other useful animals and plants.
: Nil
10 Will the formation and use of the water body result in the introduction of enhancement of water borne diseases?
: No
11 Will the impounded reservoir lead to:-
Noxious aquatic weeds like salina, water Hyacinth etc.
: No
Intermittent host (vector) like snails, mosquitoes etc.
: No
12 How will aquatic weeds be controlled in submerged areas so as to provide an improved habitat as for fishery exploitations.
: Not applicable
13 Will the project induce ad-verse climatological changes (regarding temperature, humidity, wind and precipitation
: No
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including modifications to macro and micro climate)?
14 What impact is expected on geological factors (e.g. seismic impact or reservoir loading)?
: No impact
15 Indicate the magnitude of impact due to population pressure on:-
Felling of trees for firewood. : Nil
Forest fires : Nil
Overgrazing leading to depletion of the pastures.
: Nil
Visual pollution and damage to scenic values.
: Nil
16 What arrangements are being made:-
i) to meet fuel requirements of the labour force during construction period to prevent indiscriminate felling of trees for firewood?
:
LPG gas is provided by the contractors to labours. In case of emergency, fire wood is purchased from the authorized vendors.
For compensatory a forestation? : Not applicable
To enforce anticipating laws? : Not applicable
To control flow to sediments and pollutants due to fertilizer and pesticide run-off for cultivated area.
: Not applicable
For restoration of land in construction areas (filling, grading and reforesting etc. to prevent erosion).
: The muck dumps will be re-vegetated after the muck generation is stopped to control the erosion
For soil conservation in the catchment?
: Plantation
00 COST OF ENVIRONMENTAL STUDIES AND PROJECT MANAGEMENT
01 Provision for Environmental studies/ surveys need for this project.
: Not required
02 Cost of proposed remedial and mitigative measures, if any, to protect the environment.
: Not required
03 Has the cost of environmental studies/protection measures been considered in the cost benefit analysis of the project?
: Not applicable
Tidong-I Phase-II HEP Detailed Project Report NSL Tidong Power Generation Pvt. Ltd. 17. Cost Estimate
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17 COST ESTIMATE
17.1 GENERAL
The estimate of cost has been prepared in detail to arrive at the total capital cost of the
project. The estimate is based on the actual rates as being executed and updated to year
2014-15 level.
17.2 BASIS OF COST ESTIMATE
The Phase-II estimates are prepared as per Central Water Commission guidelines
contained in the Publication entitled Broad Guidelines for the preparation of Project
Estimates for Major Irrigation and Multipurpose Projects. The guidelines contained in the
Indian Renewal Energy Development Agency Limited (IREDA) publication titled Best
Practices Manual on Small Hydro have also been followed.
The quantities of various items have been worked out from the drawings
prepared on the basis of preliminary planning and design of various components of
works after review of site conditions. At some places lump sum cost has been
considered where detailed breakup is not possible at present.
The estimate for the Generating Equipment - Electrical and mechanical works are
based on actual purchase orders placed for E & M equipment for the first 2 units
and adding possible escalations upto the completion of the project.
A provision of 1 % for building construction workers welfare cess
A provision of 4.944% of the cost has been made towards Service Tax in the
estimate of civil works.
Contractor overhead and profit @ 20% has been considered.
17.3 ESCALATION IN COST
It is estimated that with the adoption of the available technology for construction of the
various component works and considering the present status of works, the Project can be
completed in a period of 24 months. Therefore, it is appropriate that the estimated cost of
the Project as in the current year 2014-2015 is updated to the date of completion by
adopting suitable rates of average annual escalation of prices, at 7%.
17.4 DETAILS OF COST ESTIMATES
The provisions made under the various heads of cost estimate are briefly explained in the
following paragraphs.
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I-WORKS
A Preliminary (Rs. 10.80 Crores)
Under this sub-head, provision has been made for topographical surveys, field and
laboratory tests on rocks, construction material investigations and testing, collection
of hydrological and meteorological data, etc. Provision has also been made for
consultant's fees for preparation of the project report and other reports.
J Power plant civil works (Rs. 22.04 Crores)
Under this sub-head, provision has been made for the following works:
Civil Works associated with fabrication and erection of unit pressure shaft
for the 3rd unit.
Excavation at Power House and Building.
Minor Civil works in Tail Race.
O Miscellaneous (Rs. 0.50 Crores)
Under this sub-head provision has been made for the following items:
Capital cost of electrification, water supply, sewerage disposal and drainage.
Fire fighting equipment, telephone and other communication facilities.
Maintenance services for electrification, water supply etc. and other
Services including security arrangement and fire fighting arrangement.
Running of inspection vehicles, transport of staff and ambulances.
Other items such as visits of dignitaries, technical record of works, power
supply, compensation to workmen, writing of completion and history of
project etc.
P Maintenance (Rs. 0.10 Crores)
The provision has been made under this sub-head for maintenance of buildings,
roads and main civil works during construction period of the project.
Q Special Tool and Plants (Rs. 0.15 Crores)
Cost provided under this sub-head for general purpose equipments to meet
exigencies, inspection vehicle and ambulance. Provision for construction equipment
for civil works has not been made under this sub-head, as its cost shall be
recovered from the works, as per norms.
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X Environment and Ecology (Rs. 0.20 Crores)
The provision under this sub head covers the cost of landscaping, Public Health
Measures, etc. The cost is based on the current estimates and may vary with the
actual plans prepared by the various govt. Bodies. Provision for Catchment Area
Treatment (2.5% of Final Cost) and Local Area Development Fund (1.5% of Final
cost of Project) is included separately.
II-Establishment (Rs. 2.00 Crores)
A provision of Rs 2.00 Crores has been made towards establishment cost during
construction of Phase-II works.
2 b) Audits and Accounts (Rs. 0.99 Crore)
Provision of Rs 0.99 Crore has been made for Audit and Accounts.
2 c) Design Engineering Services (Rs. 2.00 Crores)
A provision of Rs 2.00 Crores has been made towards Detailed Design Engineering
services cost during construction of Phase-II works.
Cost of Electromechanical Works (Rs. 65.76 Crores)
The cost of the turbine, generator and the related electrical and mechanical
equipment for setting up of Unit-3 has been worked out as Rs. 65.76 Crores. The
cost under this head also covers transportation, insurance, erection &
commissioning charges. Major component of the electro-mechanical equipment are:
Turbine, Generator Set, Main Inlet Valve;
All Balance of plant (BOP) Electrical Equipments;
All BOP Mechanical Equipments;
Main Power Transformers;
Switchyard equipment and interconnection.
17.5 ESTIMATED COST OF THE PROJECT
The total cost of the project at December, 2014 price level works out as under:
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ABSTRACT OF COST OF CIVIL WORKS Sl. No.
Description Amount in
lakhs
A CIVIL WORKS
1 DIRECT CHARGES
I - Works
A- Preliminary
1,080.00
B- Land -
C - Works -
J. Power Plant civil works
1. Pressure Shaft
693.17
2. Power House
1,387.52
Total for J-Works
2,080.69
Add @1% on J-Works for Construction Workers Cess 1.00%
20.81
Add @4.944% on J-Works for Service Tax 4.944%
102.87
Total for J- Works with Taxes
2,204.37
K - Buildings -
M - Plantation -
O - Miscellaneous
50.00
P - Maintenance
10.00
Q - Special Tools & Plants
15.00
R. communication -
S - Power Plant & Electro-Mechanical System
6,576.44
X - Environment & Ecology
20.00
Y - Utilities and other Services
10.00
Total of I - Works
9,965.81
II Establishment
200.00
III - Tools and Plants @ 1% of cost of I - Works
99.66
IV - Suspense -
V - a)Receipt & Recoveries -
b) Resale value of Temporary buildings -
TOTAL DIRECT CHARGES 10,265.47
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ABSTRACT OF COST OF CIVIL WORKS Sl. No.
Description Amount in
lakhs
2 INDIRECT CHARGES
a) Capitalised Value of abatement of Land Revenue -
b) Audit and Account charges @ 1% of Cost of I - works
99.66
c)Design engineering services
200.00
TOTAL INDIRECT CHARGES
299.66
TOTAL DIRECT AND INDIRECT CHARGES
10,565.12
3 Escalation 878.00
4 IDC & Financing Charges 1,539.00
5 CAT 324.55
6 LADA 194.73
7 Total Cost
13,501.41
Tidong-I Phase-II HEP Detailed Project Report NSL Tidong Power Generation Pvt. Ltd. 17. Cost Estimate
Indo Canadian Consultancy Services Ltd. 187 P-1143
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