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Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd KRISHNA KNITWEAR TECHNOLOGY LTD. MORI HANOL HYDROELECTRIC PROJECT (2 X 32 MW) UTTARAKHAND PRE-FEASIBILITY REPORT MARCH 2015 1 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd TABLE OF CONTENTS 1 Salient Features 3 2 Executive Summary 10 3 Project Summary 18 4 Economic Scene of Uttarakhand Growth and 24 Constraints 5 Power Scenario in Uttarakhand & Northern 39 Region 6 Topological Survey 45 7 Hydrology 50 8 Geology and Geo-Technical aspects 65 9 Power Potential Studies 86 10 Project Optimization 99 11 Power Evacuation Arrangement 106 12 Construction Schedule 110 13 Environmental and Ecological Aspects 113 14 Estimated Cost of the Project 154 15 Financial and Economic Evaluation 159 16 Recommendations 165 2 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd 1 SALIENT FEATURES 3 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd 1. SALIENT FEATURES 1. LOCATION State : Uttarakhand District : Uttarkashi Tehsil : Purola Place : Mori - Hanol Stream : Tons, a tributary of Yamuna river Nearest Rail Head : Dehradun Geographical Coordinate : Longitude Latitude Barrage site 78º 02’ 52”E 31º 01’ 36” N : Power House site 77º 57’ 15” E 30º 58’ 33” N 2. HYDROLOGY Catchment area at diversion : 1570 km2 Design Flood (50 year return period) : 2204.0 m3/sec Design Flood (100 year return : 2594.0 m3/sec period) Standard Project Flood (SPF) : 4708 m3/sec Design Discharge : 68.05 m3/sec 3. RESERVOIR Full Reservoir Level (FRL) : 1160.00 m Minimum draw down level (MDDL) : 1156.00 m Gross storage up to FRL : 1.0175 Million m3 Peaking Capacity : 3.0 Hours Minimum 4 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd 4. DIVERSION BARRAGE A. Spillway Type : Gated Maximum Water level (1 in 100 : 1160.0 m years) Average river bed level at barrage : 1145.0 m axis Crest level of Spillway bays : 1148.0 m Bridge deck level : 1162.0 m No. of bays : 5 Type of gate : Vertical lift gate Size of gates : 9.5 m (W) x12.0 m (H) Energy Dissipation System : Stilling Basin. B. Head regulator Size of opening : 5.0m (W) x 4.0m (H) No. of bays : 4 Type of gates : Vertical lift with rope drum hoist HFL : 1160.00 m FRL : 1160.00 m MDDL : 1156.00 m Average river bed level : 1145.00 m Crest level : 1152.00 m Bridge deck level : 1162.00 m 5 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd 5. DESILTING BASINS Type : Surface 4 Nos. No of basins : 50.0 m (L) x 19.5 m (W) x 9.6 m (H) with hoppers Particle size to be excluded : 0.20 mm and above Maximum discharge : 74.86 m3/sec (with 10% overload) Flow through velocity : 0.30 m/sec Flushing velocity : 4.0 m/sec 12 Nos. Vertical lift, 1.5 m (W) x1.5 m Silt flushing gates : (H) with screw hoist 6. INTAKE POND / TUNNEL INTAKE STRUCTURE FRL : 1159.50 m MDDL : 1155.50 m Type : Bell mouth entrance Sill level : 1143.00 m Trash rack : Vertical (4 panels) Design Discharge : 74.86 m3/sec including 10% overload 7. HEAD RACE TUNNEL Type : Modified inclined leg Horse shoe shape Diameter : 6.0 m, concrete lined Velocity : 2.25 m/sec Length : 11116 m Design discharge : 68.05 m3/sec Slope : 1V : 440 H 6 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd 8. CONSTRUCTION ADITS Adit-1 (at RD 1356 m) Type and Size : D – Shaped, 6.5 m diameter Length : 470 m Adit-2 (at RD 3986 m) Type and Size : D – Shaped, 6.5 m diameter Length : 750 m Adit-3 (at RD 6661 m) Type and Size : D – Shaped, 6.5m diameter Length 427 m Adit-4 (at RD 9174 m) Type and Size : D – Shaped, 6.5m diameter Length 518 m Adit-5 (at RD 11112 m) Type and Size : D – Shaped, 6.5m diameter Length 123 m 9. SURGE SHAFT Type : Open to sky, Restricted orifice Size: : type18.0 m dia circular 3.5 m dia Orifice : Maximum Upsurge Level : 1180.58 m Minimum Down surge Level : 1134.12 m Invert Level of HRT : 1120.0 m Lining : 1000 mm thick Concrete lined Top Level : 1185.00 m 10. PRESSURE SHAFT / PENSTOCK Type : Partly Underground and partly in Size Main : trench1 No., 4.0 excavated m dia, 203 on slopem long Branches 2 nos. , 2.5 m dia, 15 m each Velocity : 5.42 m/sec Type & thickness of steel liner : IS : 2002-1992 Grade-1, 16 mm to 11. POWER HOUSE 34 mm thick Type : Surface Installed Capacity : 64 MW (2 x 32 MW) Size : MachineMinimum Hall Tail Water Level : 32.71045.55 m x m18.50 m ServiceNormal BayTail Water Level : 17.01047.0 m mx 18.5 m ControlMaximum Room gross head : 10.0113.0 m m x 18.5 m Minimum gross head : 109.0 m Head Loss (Barrage to Power House) : 8.67 m Max Net head : 104.33 m Min Net Head : 100.33 m Rated head : 103 m Centre Line of Turbine : 1044.55 m 7 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd Service bay level : 1055.55 m Flood Level (100 yr return period) : 1052.41 m Capacity of E.O.T crane : 125/32 tons 12. TAIL RACE CHANNEL Type : Surface, open channel Size : 20.1 m wide, about 100 m long Velocity : 2.535 m/sec 13. TURBINES No. & Type : 2, Francis (Vertical Shaft) Rated Power (at generator terminal) : 32.0 MW Rated net Head : 103 m Max/Min net Head : 104.33 / 100.33 m Rated discharge : 34.03 m3/sec Speed : 250.0 RPM Specific Speed : 144.06 (m. kW) 14. MAIN INLET VALVE Type : Butterfly valve Diameter : 2.5 m Location : In the power house 15. GENERATOR Vertical shaft synchronous Type : generator Number : 2 Rated Capacity : 35 MVA Nominal Active Power of each : 32.0 MW generator 16. MAIN GENERATOR STEP UP TRANSFORMER Location : Upstream side of Powerhouse No. of Three Phase Transformer : 2 Rated Output : 2 x 45 MVA Rated Voltage : 11 KV / 220 KV Frequency : 50 Hz Type of cooling : OFWF 17. 220 kV SWITCHYARD Area : 110 m x 70 m Type : Surface at EL 1055.55 m 18. TRANSMISSION SYSTEM To be undertaken by PTCUL from 220 kV transmission systems. : Switchyard of Mori Hanol HEP Transmission station : Mori 8 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility Report M/s Krishna Knitwear Technology Ltd 19. ESTIMATED COST Pre operative and Civil Works : Rs. 615.41 Crore Electrical /Mechanical Works : Rs. 109.12 Crore 20. ESTIMATED COST- FOR TARIFF CALCULATIONS Pre-operative Expenses : Rs 50.84 Crore Civil works : Rs. 564.67 Crore Elect./Mech. Works : Rs. 109.12 Crore Total Basic cost : Rs. 724.53 Crore Escalation : Rs 32.31 Crore Interest During Construction : Rs. 95.39 Crore Fund Management Expense : Rs. 3.02 Crore Total (Generation Works) : Rs. 855.25 Crore Cost per MW installed : Rs. 13.36 Crore 21. POWER BENEFITS Annual Energy generation in 90% dependable year at 95% Plant : 318.89 MU availability (Design energy) 22. FINANCIAL ASPECTS Cost of generation for first year (with : Rs 6.19 /kWh GOI norms including 15.5% ROE) 4.0 years including pre- 23. CONSTRUCTION PERIOD : construction activities 9 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility report M/s Krishna Knitwear Technology Ltd 2 EXECUTIVE SUMMARY 10 | P a g e Mori Hanol Hydroelectric Project (2 x 32 MW) Pre-Feasibility report M/s Krishna Knitwear Technology Ltd 2. EXECUTIVE SUMMARY Introduction Energy and more notably electrical energy has been acknowledged as the principal catalyst for economic and social growth of any society and country. Consumption of electrical energy has been considered as a yardstick for economic growth universally. The electricity sector in India had an installed capacity of 255.012 GW as of end November 2014 and generated around 703.1 BU for the period April - November 2014. India became the world's third largest producer of electricity in the year 2013 with 4.8% global share in electricity generation surpassing Japan and Russia. Renewable Power plants constituted 28.43% of total installed capacity and Non-Renewable Power Plants constituted the remaining 71.57%. India generated around 967 TWh (967,150.32 GWh) of electricity (excluding electricity generated from renewable and captive power plants) during the 2013–14 fiscal. The total annual generation of electricity from all types of sources was 1102.9 TeraWatt-hours (TWh) in 2013. As of March 2013, the per capita total electricity consumption in India was 917.2 kWh. The per capita average annual domestic electricity consumption in India in 2009 was 96 kWh in rural areas and 288 kWh in urban areas for those with access to electricity in contrast to the worldwide per capita annual average of 2,600 kWh and 6,200 kWh in the European Union. Electric energy consumption in agriculture is highest (18%) in India.