Lingza - Ministry of Power

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2 Preliminary Feasibility Report Lingza HE Project (3 x 40 MW) • 250m long, 3.3m diameter tailrace tunnel to carry the power house release back to the river; The power generated from the project would be evacuated through one number 220KV double circuit line to be connected at the pooling station, which is assumed to come up near Teesta-III HE Project to feed power to the national grid. The salient features of the projects are as under: LOCATION SALIENT FEATURES State Sikkim District North Sikkim River Ringpi Location Of Dam Site U/S Of Ishana Village Location Of Power House U/S Of Village Lingza Nearest Rail Head New Jalpaiguri Nearest Airport Bagdogra Latitude 27º36’00’’& 27º33’46’’ Longitude 88º27’20’’& 88º26’39’’ HYDROLOGY Catchment Area 198 Km² Design Flood (PMF) 940 Cumecs DIVERSION TUNNEL Diameter & Shape 6 M, Horse-Shoe Length 400 M Diversion Discharge ±300 Cumecs
Diversion Tunnel Gate 2nos., 3 M X 7.5 M COFFER DAMS DAM 3 Preliminary Feasibility Report Lingza HE Project (3 x 40 MW) Type Rock Fill With U/S Concrete Facing Max. Ht Of U/S Coffer Dam 20M Max. Ht Of D/S Coffer Dam 10M Type Concrete Gravity With Central Spillway Dam Top EL 1855 M River Bed Level EL 1795M Length At The Top 320 M Dam Height (Above River Bed Level) Max. Dam Height (Above Deepest Fdn. Level) SPILLWAY 60 M 75 M Type Low Level Orifice Type Crest Elevation EL 1810 M Number & Size Of Spillway Opening 3 Nos, 4 M (W) X 6 M (H) Design Flood 940 Cumecs RESERVOIR Full Reservoir Level (FRL) EL 1850 M Min. Draw Down Level (MDDL) EL 1830 M Area Under Submergence At FRL 10.75 Ha Gross Storage 2.64MCM
Page 3 and 4: CHAPTER I TABLE OF CONTENTS DESCRIP
Page 5 and 6: TITLE ANNEXURES Preliminary Feasibi
Page 7: 1.0 INTRODUCTION CHAPTER-I EXECUTIV
Page 11 and 12: Shape Circular, Steel Lined Length
Page 13 and 14: • Study of existing infrastructur
Page 15 and 16: Civil works : 527.68 Electro Mechan
Page 17 and 18: 2.1 GENERAL INFORMATION 2.1.1 Intro
Page 19 and 20: 12 Preliminary Feasibility Report L
Page 23 and 24: 2.2.3 Load Demand & Power Position
Page 25 and 26: Preliminary Feasibility Report Ling
Page 27 and 28: 3.2 SOCIO-ECONOMIC AND OTHER ASPECT
Page 29 and 30: 3.2.5 Trade & Industry 21 Prelimina
Page 31 and 32: v) Teesta Stage-V 23 Preliminary Fe
Page 35 and 36: CHAPTER-IV 26 Preliminary Feasibili
Page 37 and 38: Central Crystalline Gneissic Comple
Page 43 and 44: Preliminary Feasibility Report Ling
Page 53 and 54: (iii) Based on observed G&D data at
Page 55 and 56: • Unit Hydrograph technique 45 Pr
Page 57 and 58: Table 5. 5 Comparison Of Various Fl
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AVERAGE 10-DAILY DISCHARGE 49 Preli
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51 Preliminary Feasibility Report L
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6.1 INTRODUCTION CHPAPER-VI CONCEPT
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6.3 FURTHER STUDIES 6.3.1 Topograph
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6.4.11 Instrument And Remote Contro
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7.1 GENERAL CHAPTER-VII POWER POTEN
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Net operating head =MDDL+2/3 (FRL-M
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Month JUNE JULY AUGUST SEPTEMBER OC
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TABLE 7.3 70 Preliminary Feasibilit
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S. No. 1 2 3 4 5 6 7 8 9 10 11 TABL
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Period Yearly inflow (M Cum) Annual
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INCREMENTAL MW?MU/?MW 2.50 2.00 1.5
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TABLE 7.7(B) 78 Preliminary Feasibi
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TABLE7.7 (D) ENERGY GENERATION IN Y
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TABLE 7.7 (F) ENERGY GENERATION IN
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TABLE7.7 (H) ENERGY GENERATION IN Y
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TABLE7.7 (J) ENERGY GENERATION IN Y
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TABLE 7.7 (L) ENERGY GENERATION IN
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TABLE 7.7 (N) ENERGY GENERATION IN
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TABLE 7.7 (P) ENERGY GENERATION IN
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TABLE 7.7 (R) ENERGY GENERATION IN
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TABLE 7.7 (T) ENERGY GENERATION IN
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Preliminary Feasibility Report Ling
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100 Preliminary Feasibility Report
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Educational Facilities 106 Prelimin
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9.5.3 Impacts on Air Environment 11
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CHAPTER - X INFRASTRUCTURE 10.1 EXI
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INFRASTRUCTURE Acquisition of priva
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CHAPTER -XII COST ESTIMATES 130 Pre
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ABSTRACT OF COST OF WORKS 134 Preli
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3.0 Pre-Construction Stage Investig
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S. N. DIVERSION TUNNELS 140 Prelimi
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DAM 142 Preliminary Feasibility Rep
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J-POWER PLANT APURTENANCE (CIVIL WO
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S. N. DESILTING CHAMBER (INCLUDING
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S. N. HEAD RACE AND TAIL RACE TUNNE
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S. N. PRESSURE SHAFTS AND PENSTOCKS
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S. N. SWITCH YARD 152 Preliminary F
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Sl No K-BUILDINGS Description Plint
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DISTRIBUTION OF COST UNDER HEAD Q -
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S. No. V - RECEIPT & RECOVERIES Ite
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14 15 S.No. Marine frieght and insu
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UNIT COST OF ENERGY AT BUS BAR AT C
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DIVERSION BED LEVEL : 1055 m. PANAN
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27° 45' 40' 35' 27° 30' 88° 15'
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LINGZA H.E. SCHEME - SIKKIM PLATE 4
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2000 2000 2200 2400 2600 2800 RINGP
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2000 PROPOSED ROAD 1800 1600 1400 1
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L7 L6 ? L5 L4 125000 L3 ? L2 ? 3000
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HRT3.3 M. Ø Ø3300 Ø10000 TYP. SE
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The area around the proposed projec
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Neogi et al (1986) have clubbed tog
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compositional banding in metasedime
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evident. The latter graben is consi
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REFERENCE Chakraborti, B., and Bane
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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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TITLE ANNEXURES 6.2 Preliminary Fea
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studies methodologies has been furn
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REPLY ON COMMENTS OF CEA (HP & I )
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REPLY ON COMMENTS OF SP&PA DIVISION
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REPLY ON COMMENTS OF CMDD DIRECTORA
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Lingza - Ministry of Power

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