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D J FINAL REPORT E-235 VOL. 23 Public Disclosure Authorized ENVIRONMENTAL IMPACT EXAMINATION OF 500 KV TRANSMISSION SYSTEM FOR INDEPENDENTPOWER PRODUCERS Public Disclosure Authorized _ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~.1 Public Disclosure Authorized EGAT - PROGRAM SUPPORT.NVESTMENT PROJECT (WORLD BANK PARTIAL CREDIT GUARANTEE) submitted to Public Disclosure Authorized Electricity Generating Authority of Thailand August 1997 FINAL REPORT -ENVIRONMENTAL IMPACT EXAMINATION OF 500 KV TRANSMISSION SYSTEM FOR INDEPENDENT POWER PRODUCERS submitted to Electricity Generating Authority of Thailand August 1997 The Study Team Environmental Impact Examination 500 KV. Transmission System Project for Independent Power Producers in Western and Eastern Areas 1 Project Management Assoc. Prof. Dr. Samakkee Boonyawat Ph.D. Project Manager Environmental Expert 2. Physical Resource Worakai Usa B.S. Forestry/Watershed Scientist 3. Biology Resource Surachit Waengsothorn M.S. Forestry Specialist 4. Hunan Use Value Somnimitr Pukngam M.S. Land use and Agricultural Scientist 5. Quality of life Value Kallayanee Kullachai M.S. Socio-economic /Environmental science 6. Supporting Staff Yutthaphong Keereemuangkla B.S. Forestry/Project Staff Anut Keawwong B.S. Forestry/Project Staff ACKNOWLEDGEMENT The environmental impact examination and analysis of the 500 KV Transmnission System For IPPs in western area and eastern area report was accomplished as target with the support of various concerned agencies to whom the study team would like to take this opportunity to thank namely Royal Forest Department and Community Development Department for their supportive data as well as the accomnodation for field investigation Last but not least, we are very appreciate EGAT's staff for their acconrmodating during the field survey and excellent cooperation in providing necessary data for this study Project Management Content page Project Descriptions 1.1 Rationale of the Project in the National Context 1 1.2 500 KV TransmnissionSystem Project for IPPs 2 1.3 The Scope of the Project 3 1.4 Detailed Activities of the Project 7 2. Specification For The Project That Required For The Environmental Impact Assessment Report 2.1 The Envirornmental Impact Assessment Deternined by the Project Feature 10 2.2 The Environmental Impact Assessment Detennined by tne Area Feature 12 3. Preliminary of EIA and Mitigation Plans of Project 3.1 General 12 3.2 EGAT s Environmental Guidelines for Transmission System 16 3.3 Priliminary Mitigation Plans For 500 KV. Transmission System For IPPs 19 4 The Study of Environmental Impact Examination 4.1 Introduction 20 4.2 Physical Resources 20 4.3 Biological Resources 24 4.4 Human Use Values 58 4.5 Quality of Life Values 74 Content (Con'd) page 5 The Overall Environmental Impact Examination 5.1 The Environmental Impact Examination Criterias 82 5.2 Summary of Environmental Impact Examination 83 5.3 The Overall Project Impacts 86 6 Mitigation Measures on The Environmental Impact 6.1 The Mitigation Measures on The Physical Impacts 87 6.2 The Mitigation Measures on The Biological Impacts 87 6.3 The Mitigation Measures on The Human Use Values Impacts 88 6.4 The Mitigation Measures on The Quality of life Values hnpacts 88 7 References 89 List of Tables Tables page 2.1-1 Notification for Types and Sizes of Project or Activities Required 13 an Environmental Impact Assessment Report 2.1-2 Additional Types and Scales of Projects or Activities 15 Required for an Environmental Impact Assessment Report 4.3-1 Name, Length and Area of national forest reserve are passed 28 through by the 500 KV Transmission System for EPPs in western area (line 1) 4.3-2 Name, Length and Area of national forest reserve are passed 29 through by the 500 KV Transmission Systmi foI irrS in western area (line 2) 4.3-3 Name, Length and Area of national forest reserve are passed 42 through by the 500 KV Transmission System for EPPs in eastern area (line 2) 4.3-4 Species diversity and appeamce of wildlife found in the study 48 areas and adjacant of the project of 500 KV Transmission System for IPPs in western and eastern area 4.3-5 Summarized the number of wildlife species found in the 500 KV 55 Transmission System for IPPs Project 4.4-1 Land utilization by province in 1992 60 4.4-2 Utilization of farm holding land by province in 1992 61 List of Tables (Con'd) Tables page 4.4-3 Planted area and Yield of Major Plant by Province in 500 KV 68 transmission line area in 1995 4.4-4 Production cost of major plant by region in crop year 1994/1995 69 5.2-1 Summerized environmental impact examination and mitigation 84 measures of 500 KV Transmission System of IPPs Project List of Figures Figures page 1.3-1 500 KV. transmission line of western route of IPPs project 4 1.3-2 500 KV. transmission line of eastern route of IPPs project 6 1.4-1 Tree cutting within 30 meter wide of corridor for 500 KV. transmission line system 8 1.4-2 Foundation plan and stub of 500 KV. transmission line system 11 4.3-1 Khao Chairaj and Khong Grud National Forest Reserve, Changwat 30 Prachuab Khiri Khan within the right of way of western route 4.3-2 Thab Sakae National Forest Reserve, Changwat Prachuab Khiri Khan 31 within the right of way of western route 4.3-3 Kui Buri National Forest Reserve, Changwat Prachuab Khiri Khan 33 within the right of way of western route 4.3-4 Yang Cha-am and Ban Rong National Forest Reserve, Changwat 35 Phetchaburi within the right of way of western route 4.3-5 Stunt dry dipterocarp forest of Cha-am and Ban Rong National Forest 36 Reserve, Changwat Phetchaburi 4.3-6 Yang Hak and Khao PumnNational Forest Reserve, Changwat 37 Phetchaburi within the right of way of western route List of Figures (Con'd) Figures page 4.3-7 Nong Yaplong National Forest Reserve, Changwat Phetchaburi 38 within the right of way of western route 4.3-8 Stunt dry dipterocarp of Nong Yaplong National Forest Reserve, 39 Changwat Phetchaburi 4.3-9 Pu Yang and Pu Samson National Forest Reserve, Changwat Ratchaburi 41 within the right of way of western route 4.3-10 Khlong Rawemg and Khao Som Sed National Forest Reserve, Changwat 43 Rayong within the right of way of eastern route 4.3-11 Daeng and Chum Num Klang National Forest Reserve, Changwat 45 Chonburi within the right of way of eastern route 4.3-12 Tha Boomnee and Bo Thong National Forest Reserve, Changwat 46 Chonburi within the right of way of eastern route 4.4-1 The coconut plantation, existing land use at substation 1 (Bang Saphan) 62 of westem route 4.4-2 The existing land use (coconut plantation) at substation II (Thap Sakae) 62 of western 4.4-3 Pmeapple field and mango orchard, agricutural land along the 63 transmission line 1 (Bang Saphan - Chom Bung) List of Figures (Con'd) Figures page 4.4-4 Paddy field after harvested under transmission line 1 in Changwat 63 Phetchaburi 4.4-5 The old coconut palm, existing land use at Rayong4-substation 65 4-4-6 Mixed orchard land use along transmission line 1 of eastern route 65 4.4-7 The pineapple field and pararubber plantation land use under 67 transmnissionline 2 of eastarn route 4.4-8 The paddy field and eucalyptus plantation land use under 67 transnission line 2 of eastern route 4.5-1 Small house within the right of way of line 1 (western route) 77 4.5-2 Medium house within the right of way of line 1 (western route) 77 4.5-3 Tharanukroh Cemetery in Changwat Chonburi within the right 80 of way of line 1 (eastern route) 4.5-4 Factory building in Changwat Chonburi within the right of 80 way of line I (eastern route) FINAI, REPORT ENVIRONMENTAL IMPACT EXAMINATION OF 500 KV TRANSMISSION SYSTEM FOR INDEPENDENT POWER PRODUCERS I PROJECT DESCRIPTIONS 1.1 RATIONALEOF THE PROJECTIN THE NATIONALCONTEXT The Electricity GeneratingAuthority of Thailand (EGAT) is a state enterprise comes under direct supervisionof The Prime MinisterOffice. The EGAT,which was establishedon May 1, 1969 to nationalizeand consolidatethe functionand responsibilitiesof three independentstate enterprises ; the Yanhee Electricity Authority (YEA), the Lignite Authority (LA) and the North-East Electricity Authority (NEEA),now is in the process of privatization. The EGAT has the main responsibility to provide electricity for the whole Kingdom of Thailandby generating,transmitting and selling the bulk energy to two distributingentities namely the Metropolitan Electricity Authority (MEA) and the Provincial Electricity Authority (PEA) including other energy also undertakes other businesses related to the production of electric energy or contributingto EGAT's operation. EGAT is finmly commnittedto provide an efficient power services to meet the requirments nation-widewith sufficiency,reliability and at the reasonablerate, while enhancingand protecting the environmentas well as encouragingpublic participationin EGAT's operation. A rapid growth of electricitydemand has been witnessed over the past decade in Thailand, as a result of the country's favorable economy.The system peak in the fiscal year 1995 was recorded as 12,267.9MW, representing almost 15% growth from the prior year The total energy production rose to 79,112 million kWh; about 47% was used by the industrial sector, 27% by the business sector, 21% by the residential sector and 5% by the others. 2 The power demand in Thailand is expected to continuously increase at high rate as the national economic growth is anticipate to increase at rapid pace particularly in business and industrial areas. The continuing surge in electricity demand in Thailand has made it imperative for EGAT to expand and upgrade its system in order to maintain acceptable level of efficiency, service quality and reliability.