Lingza - Ministry of Power

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31 Preliminary Feasibility Report Lingza HE Project (3 x 40 MW) the region. The Seismic data for the region covering longitude 86-90º and 25-29º has been analyzed. The probable intensity of earthquake within seismic zone-IV corresponds to intensity VIII on Modified Mercali Scale. Notable earthquakes that have occurred close to this area are Cachar 1869 (M 7.5), Great Assam Earthquake 1897 (M 8.7), Dhubri 1930 (M 7.1), Bihar-Nepal Earthquake 1934 (M 8.3), Assam Earthquake 1950 (M 8.5) and Nepal-India border earthquake 1988 (M 6.4). The maximum intensity experienced in Sikkim region during Great Assam Earthquake, 1897 was VIII (MMI) and during Bihar-Nepal border earthquake, 1934 was VII (MMI). Two major tectonic features occur in the area namely MBT (Main Boundary Thrust) and MCT (Main Central Thrust) besides other minor features. Many past occurrences of earthquakes have been associated with these major lineaments. 4.5 GEO-PHYSICAL SURVEY The area at dam site is covered by heavy boulders and the opposite bank was not accessable and is connected by 5 km long hilly footpath. Hence the geophysical survey was not feasible at dam location. The rock is fully exposed in the power house area, therefore geo-physical survey was not required. 4.6 CONSTRUCTION MATERIAL SURVEY The availability of river shoals may not suffice the requirement of construction material. Hence, the alternative arrangements for construction material have to be explored. The area is bound by steep rocky ridges, therefore the quarries for construction material can be developed. 4.7 RECOMMENDATIONS • At the dam axis and powerhouse area, few drill holes are required to assess overburden thickness and its amenability for construction of various structures. • Detailed geological mapping of the project components need to be carried out.
32 Preliminary Feasibility Report Lingza HE Project (3 x 40 MW) • Availability of construction material may be assessed after detailed survey of the quarries and may be got tested for their suitability at FR/PFR stage.
Page 3 and 4: CHAPTER I TABLE OF CONTENTS DESCRIP
Page 5 and 6: TITLE ANNEXURES Preliminary Feasibi
Page 7 and 8: 1.0 INTRODUCTION CHAPTER-I EXECUTIV
Page 9 and 10: Diversion Tunnel Gate 2nos., 3 M X
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
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Page 43 and 44: Preliminary Feasibility Report Ling
Page 53 and 54: (iii) Based on observed G&D data at
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Page 57 and 58: Table 5. 5 Comparison Of Various Fl
Page 59 and 60: AVERAGE 10-DAILY DISCHARGE 49 Preli
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Page 66 and 67: 6.1 INTRODUCTION CHPAPER-VI CONCEPT
Page 72 and 73: 6.3 FURTHER STUDIES 6.3.1 Topograph
Page 76 and 77: 6.4.11 Instrument And Remote Contro
Page 78 and 79: 7.1 GENERAL CHAPTER-VII POWER POTEN
Page 80 and 81: Net operating head =MDDL+2/3 (FRL-M
Page 82 and 83: Month JUNE JULY AUGUST SEPTEMBER OC
Page 84 and 85: TABLE 7.3 70 Preliminary Feasibilit
Page 86 and 87: S. No. 1 2 3 4 5 6 7 8 9 10 11 TABL
Page 88 and 89: 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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