Teesta - Ministry of Power

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17 Preliminary Feasibility Report Teesta (I) HE Project (4 x 80 MW) expected that the power generated from this project shall be cheap and helpful to the region as compared to thermal and other expensive power in the region. 2.2.3 Existing Power Installations In Sikkim First time, a micro hydel station was established in Sikkim on the bank of Ranikhola at Lower Sichey Busty with an installed capacity of 10 KW on 27 th May 1927for the needs of the members of the Royal family and Gangtok. Later, Lower Lagyap Hydel Project with an installed capacity was constructed by Govt. of sikkim and this was a big boom. Presently the following power stations are under operation in Sikkim. Sl. No. Hydel Schemes Year of Completion Installed Capacities (MW) Firm Capacity (MW) 1 2 3 4 5 1 Jali Power House 1966 2.10 1.20 2 Rothak Micro Hydel 1971-72 0.20 0.10 3 Rimbi Micro Hydel, Stage-I 1970-71 0.60 0.30 4 Lower Lagyap HEP 1979-80 12.00 5.50 5 Lachen Micro Hydel 1989-90 0.10 0.05 6 Rimbi Stage-II 1989-90 1.00 0.50 7 Rongnichu Micro Hydel-II 1988-89 2.50 1.20 8 Lachung Micro Hydel 1991-92 0.20 0.10 9 Mayongchu 1993-94 4.00 2.00 10 Upper Rongnichu HEP 1994-95 8.00 4.00 11 Kalej Khola 1995-96 2.00 1.00 12 Rangit Hydel Project 1999-00 60.00 20.00
18 Preliminary Feasibility Report Teesta (I) HE Project (4 x 80 MW) 13 Robom Micro Hydel 2003-04 3.0 1.00 I - Total Hydel Power 95.70 36.95 II - Total Diesel Power 2.70 2.70 Total Generation Capacity 98.40 39.65 2.2.4 Load Demand & Power Position of Eastern Grid Table-2-1 shows the power supply position of Eastern grid up to 2009-10. 2.3 NECESSITY OF THE PROJECT AND RELATED ASPECTS The need for Teesta I H.E. Project has been considered in the context of increasing demand of power in the eastern region. It has been assumed that eastern region will have energy requirements at the rate 10% per annum rise of each year. This is a run of the river scheme with little pondage in Teesta basin in North Sikkim District, Sikkim. It will generate 1298.12 MU in 90% dependable year (1976-77) with 95% machine availability. The power generated at Teesta I HEP (4 X 80MW) shall be partially absorbed in North Sikkim and excess power shall be evacuated to national grid.
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Page 26 and 27: Table 2.1 POWER SUPPLY POSITION OF
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Page 34 and 35: Rangit Basin 26 Preliminary Feasibi
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Page 38 and 39: 4.1 INTRODUCTION CHAPTER-IV TOPOGRA
Page 40 and 41: Group Lithology 31 Preliminary Feas
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Page 48 and 49: 5.1 GENERAL CHAPTER -V HYDROLOGY 38
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Page 70 and 71: TEESTA-I H.E PROJECT AVERAGE 10-DAI
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Discharge (cumec) 55 50 45 40 35 30
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Elevation(m) Area(Ha) Capacity(Ha.m
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CHPAPER-VI CONCEPTUAL PLANNING AND
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69 Preliminary Feasibility Report T
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6.2.3 Reservoirs 71 Preliminary Fea
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6.2.7.2 Tail Race Tunnel 75 Prelimi
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6.4.1.8 Instrument And Remote Contr
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6.4.2.5 Silt Flushing Tunnel Gates
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Preliminary Feasibility Report Tees
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90% Dependable Year: 84 Preliminary
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Table-7.1 DISCHARGE DATA 86 Prelimi
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PERIOD Table-7.5 92 Preliminary Fea
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INCREMENTAL (DMU/DMW) 2.60 2.40 2.2
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Table-7.7 (B) 96 Preliminary Feasib
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Table-7.7 (D) 98 Preliminary Feasib
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Table-7.7 (F) 100 Preliminary Feasi
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Table-7.7 (H) 102 Preliminary Feasi
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Table-7.7 (J) 104 Preliminary Feasi
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Table-7.7 (L) 106 Preliminary Feasi
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Table-7.7 (N) 108 Preliminary Feasi
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Table-7.7 (P) 110 Preliminary Feasi
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Table-7.7 (R) 112 Preliminary Feasi
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Table-7.7 (T) 114 Preliminary Feasi
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9.2 PHYSICAL ENVIRONMENT 9.2.1 Clim
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120 Preliminary Feasibility Report
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9.6.5 Impacts on Socio-Economic Env
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10.1.3 Power Availability 140 Preli
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11.2.10 Tail Race Tunnel: 149 Preli
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Sl. No. Name of Work Unit Quantiy D
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CHAPTER -XII COST ESTIMATES 152 Pre
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2.13 Consultant’s fees including
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S. N. ABSTRACT OF COST OF C - WORKS
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S. No. COFFER DAMS (FOR BOTH THE DA
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S. No. SPILLWAYS (FOR DAM-I & DAM-I
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S. No. INTAKE STRUCTURES (FOR BOTH
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S. No. ADITS 170 Preliminary Feasib
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S. No. SURGE SHAFT 172 Preliminary
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S. No. POWER HOUSE COMPLEX 174 Prel
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S. No. HYDRO MECHANICAL EQUIPMENT 1
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S. No O-MISCELLANEOUS 182 Prelimina
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S. No. V - RECEIPT & RECOVERIES 190
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13 14 15 16 17 18 Custom Duty @22%
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Year Estimated Cost at June 2003 P.
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CALCULATION OF ENERGY RATE WITH PRE
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TALEM H.E PROJECT R.B.L- EL. 3630 F
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TALEM HYDRO ELECTRIC PROJECT (3 X 2
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27° 47' LOHNAK CHU 3400 U/S COFFER
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H.R.T. 4.0 MØ H.S. SHAPE (FROM DAM
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L10 ? L9 L8 L7 PARAPET L6 ? L5 ? 17
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HRT4000 Ø FROM DAM-I 32Ø 5000 LON
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The rock types encountered in the a
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SEISMOTECTONICS AND SEISMICITY Seis
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interbanded and are expected to pro
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founded on sandy soil is higher tha
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X Some well built wooden structures
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1940 8 2 3 3 59 . 0 28 . 00 90 . 50
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1988 5 10 7 16 16 . 1 25 . 32 90 .
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1997 1 25 20 8 28 . 7 30 . 00 88 .
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2000 10 3 17 8 22 . 4 26 . 88 89 .
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REPLY OF COMMENTS OF CEA (HP & I )
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REPLY ON COMMENTS OF SP&PA DIVISION
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Sikkim is on the higher side as the
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of the project on the fast track ba
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Consistency of data Water availabil
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YEAR/ MONTH I 1976 II III I 1977 II
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