DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA ... DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA CEYLON...

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Transcript of DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA ... DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA CEYLON...

  • DEMOCRATIC SOCIALIST REPUBLIC OF SRI LANKA

    CEYLON ELECTRICITY BOARD

    SUSTAINABLE POWER SECTOR DEVELOPMENT PROJECT

    SUB PROJECT – 03 Improvement of Transmission System Reliability

    INITIAL ENVIRONMENTAL EXAMINATION

    PREPARED FOR ASIAN DEVELOPMENT BANK ENVIRONMENT UNIT CEYLON ELECTRICITY BOARD COLOMBO SRI LANAKA

    March 2008

  • Page 1

    Abbreviations

    ADB - Asian Development Bank BoI - Board of Investment CDM - Clean Development Mechanism CEA - Central Environmental Authority CEB - Ceylon Electricity Board db(A) - A-Weighted sound measurement in decibels DS - Divisional Secretary EIA - Environmental Impact Assessment EPL - Environmental Protection License GIS - Gas Insulated Substation GN - Grama Niladhari GS - Grid Substation IEC - International Electrotechnical Commission IEE - Initial Environmental Examination IPP - Independent Power Producer JICA - Japan International Co-operation Agency km - kilometer kV - kilovolt m - meter MOH - Medical Officer of Health MVA - Megavolt Ampere MW - Megawatt NEA - National Environment Act PSS/e - Power System Simulation REA - Rapid Environmental Assessment ROW - Right of Way

  • Page 2

    CONTENTS

    1 INTRODUCTION 6 1.1 The Initial Environmental Examination (IEE) 8

    2 DESCRIPTION OF THE SUB-PROJECT 8 2.1 Scope and Outcome of the Sub-project 8

    2.1.1 Summary Scope 8 2.2 Detailed Scope 10

    2.2.1 First Priority Scope 10 2.3 Project Description 13

    2.3.1 GSs to be Augmented 13 2.3.2 New Grid Substations 19 2.3.3 New Transmission Lines 20

    2.4 Type of Project and the Category 26 2.5 Need for the Project 26

    2.5.1 Policy Focus 26 2.5.2 Expansion of Grid Substation Capacity 26 2.5.3 New Transmission Lines 27

    3 STUDY METHODOLOGY, SCOPE AND LIMITATIONS 27

    4 RAPID ENVIRONMENTAL ASSESSMENT 28

    5 DESCRIPTION OF THE ENVIRONMENT 28 5.1 Three New Grid Substations to be Built 28 5.2 Eight Existing Grid Substations to be Augmented 31 5.3 Description of the Environment Along the Proposed Transmission Lines 36

    5.3.1 Galle- Matara 132 kV Transmission Line 36 5.3.2 Habarana-Valachchenai 132 kV Line 40 5.3.3 Puttalam-Maho 132 kV Transmission Line 44 5.3.4 Ukuwela-Pallekelle 132 kV Transmission Line 48 5.3.5 Proposed In and Out Connection at Naula 52

    6 POTENTIAL ENVIRONMENTAL IMPACTS AND PROPOSED MITIGATION MEASURES 52 6.1 Grid Substations 52

    6.1.1 Project Siting 53 6.1.2 Potential Environmental Impacts of GSs and Mitigatory Measures 53 6.1.3 Potential Environmental Enhancement Measures 55

    6.2 Transmission Lines 56 6.2.1 Potential Environmental Impacts and Mitigatory Measures 56 6.2.2 Galle-Matara 132 kV Transmission Line 58 6.2.3 Habarana-Valachchenai 132 Transmission Line 60 6.2.4 Puttalam-Maho 132 Transmission Line 63 6.2.5 Ukuwela-Pallekelle 132 kV Transmission Line 65 6.2.6 Transmission Line for Naula In and Out Connection 67

    7 SRI LANKA LEGAL REQUIREMENTS 69 7.1 Environmental Acts and Regulations 69 7.2 Environmental Approval Procedure 69

  • Page 3

    7.2.1 Augmentation of Eight Grid Substations 69 7.2.2 Construction of Three New Grid Substations 69 7.2.3 Transmission line for in and out Connection to Naula GS 71 7.2.4 Transmission Lines 71

    8 INSTITUTIONAL REQUIREMENTS AND ENVIRONMENTAL MONITORING PLAN 71 8.1 Procedure to Handle Public Complaints 71 8.2 Environmental Management and Monitoring Plan 72

    9 PUBLIC CONSULTATION AND INFORMATION DISCLOSURE 82 9.1 Grid Substations 82 9.2 Right-of-Way of the Transmission Line 83

    9.2.1 Preliminary Work Conducted 83 9.2.2 Sri Lanka Environmental Approval Process 83 9.2.3 Formal Notice and Route Confirmation 86 9.2.4 Public Consultation and Appeal Procedure to Address Grievances 86

    9.3 Procedure to Handle Public Complaints During Implementation Phase 87

    10 FINDINGS AND RECOMMENDATIONS 87 10.1 Project Justification 87 10.2 Environmental Impacts of GS Augmentation 88 10.3 Transmission Lines 88

    11 CONCLUSIONS 88

    ANNEX 1: RAPID ENVIRONMENTAL ASSESSMENT (REA) CHECKLIST 90

  • Page 4

    LIST OF FIGURES

    Figure 1.1- CEB Existing Transmission System 2007 7

    Figure 2.1- Space Available for the Augmentation at Horana GS 14

    Figure 2.2- Space at Kurunegala GS for the Augmentation 15

    Figure 2.3- Space at Panadura for New 33 kV Bay and the New Transformer 16

    Figure 2.4- Space at Veyangoda GS Available for the Augmentation 17

    Figure 2.5- Sri Lanka Transmission Map (2011) Showing the Elements of the Subproject 18

    Figure 2.6- Proposed Route for the New Galle-Matara Transmission Line 21

    Figure 2.7- Proposed Route for the Habarana-Valachchenai Line 22

    Figure 2.8- Proposed Traverse of the Puttalam-Maho Line 23

    Figure 2.9- Ukuwela-Pallekelle Line Trace 24

    Figure 5.1 - Population Based on Gender in Each Area 30

    Figure 5.2 – Population Composition based on Ethnicity 33

    Figure 6.1- Optional Routes for the Galle-Matara Transmission Corridor 58

    Figure 6.2- Alternatives Routes for the Habarana - Valachchenai Transmission Corridor 60

    Figure 6.3- Optional Routes for the Transmission Corridor Between Puttalam and Maho 63

    Figure 6.4- Optional Routes for the Transmission Corridor between Ukuwela & Pallekelle 65

    LIST OF TABLES

    Table 2.1- Summary Scope of the Subproject 10

    Table 2.2- Land Use in the Galle-Matara Line Corridor 20

    Table 2.3- Land Use Along the Habarana-Valachchenai Line Route 22

    Table 2.4- Land-use Along the Puttalam-Maho Line Corridor 23

    Table 2.5- Land Use Table 24

    Table 5.1 – Location of New Grid Substations in terms of DS Division 29

  • Page 5

    Table 5.2 - Head Count Index of the DS Division Where the Selected GSs are Located 30

    Table 5.3 - Percentage Distribution of Educational Attainment by District 31

    Table 5.4 –Grid Substations Proposed to be Augmented 31

    Table 5.5 - Head Count Index of the DS Division Where the Selected GSs are Located 35

    Table 5.6 - Percentage Distribution of Educational Attainment by District 35

    Table 5.7- Agricultural Activities in Galle-Matara Districts 38

    Table 5.8- Socio-economic Conditions in Galle and Matara 39

    Table 5.9- Agricultural Land Use in Polonnaruwa and Batticaloa 43

    Table 5.10- Summaried Socio-economic Information on Polonnaruwa and Batticaloa 43

    Table 5.11- Details of Agricultural Activities Along the Puttalam-Maho Line 47

    Table 5.12- Socio-economic Conditions in Puttalam and Kurunegala Districts 48

    Table 5.13- Socio-economic Conditions in the Kandy District 52

    Table 6.1- Land-use Pattern Along the Three Optional Routes for Galle-Matara 59

    Table 6.2- Land-use Pattern Along the Three Optional Routes for Habarana-Valachchenai 61

    Table 6.3- Land-use Pattern Along the Three Optional Routes for Puttalam – Maho 64

    Table 6.4- Land-use Pattern Along the Three Optional Routes for Ukuwela-Pallekelle 66

    Table 8.1- Environmental Monitoring Plan 73

    Table 8.2- Cost Estimates for the Environmental Mitigation and Monitoring Plan 82

  • Page 6

    1 INTRODUCTION The project proponent, The Ceylon Electricity Board (CEB) is the national electricity utility in Sri Lanka responsible for generation and transmission of electricity in the country, and is also responsible for the distribution and supply of electricity to about 90% of the customers. About 37% (2006) of electricity is generated by Independent Power Producers (IPPs) and Small Power Producers (SPPs), while the balance generation and the entire transmission system is owned and operated by CEB. The transmission system comprises 220 kV and 132 kV transmission lines interconnecting Grid Substations (GSs) and power stations. By end 2006, the CEB transmission system consisted of 50 grid substations and about 2050 km of transmission lines. The existing transmission network and the GSs are shown in Figure 1.1. Over the past 10 years, the demand for electricity in Sri Lanka has been growing at annual rates between 5.1% and 13.3%, except in 2001-2 when there were rolling blackouts to overcome generation shortages. With the rapid expansion of rural electrification, this demand growth is recorded in the provincial centres as well, where electricity use for residential, commercial and industrial activities are on the rise. The trend is expected to continue for several years into the future, owing to the Government’s declared policy of providing electricity to at least 85% of households by year 2015. The present electrification ratio stands at 76.7%1. To satisfy the declared policy goals in electrification and to meet the underlying growth in demand from existing and new customers, CEB prepares regional demand forecasts using a combination of trend analysis and information available on expected spot loads for new industrial and commercial developments. Based on these 10-year regional demand forecasts, and the annually updated generation expansion plan, the CEB’s Transmission Planning Branch prepares a 10-year transmission expansion plan. This plan is updated every year. This plan is prepared at a national level and is a comprehensive plan, using tools such as Power System Simulation Software (PSS/e), and provides information with regard to security analysis, stability, fault levels and reliability of the sys