HANDBOOK ON CONSTruCTION TECHNIquES

1 AsiAn Development BAnk6 ADB Avenue, Mandaluyong City1550 Metro Manila, DEVELOPMENT BANKH andbook on CONSTruCTION TechniquesA Practical Field Review of Environmental Impacts in Power Transmission/Distribution, Run-of-River Hydropower and Solar Photovoltaic Power Generation Projects The report highlights a broad spectrum of environmental impacts triggered due to CONSTruCTION , operation, and maintenance and their mitigation for four sectors: (i) power transmission, (ii) distribution, (iii) run-of-river hydropower, and (iv) solar photovoltaic generation projects for dissemination among Asian Development Bank specialists working in the energy sector and environment the Asian Development BankADB s vision is an Asia and Pacific region free of poverty.

2 Its mission is to help its developing member countries reduce poverty and improve the quality of life of their people. Despite the region s many successes, it remains home to the majority of the world s poor. ADB is committed to reducing poverty through inclusive economic growth, environmentally sustainable growth, and regional in Manila, ADB is owned by 67 members, including 48 from the region. Its main instruments for helping its developing member countries are policy dialogue, loans, equity investments, guarantees, grants, and technical ON CONSTruCTION TECHNIquESA PrACTICAL FIELD rEVIEw OF ENVIrONMENTAL IMPACTS IN POwEr TrANSMISSION/DISTrIBuTION, ruN-OF-rIVEr HyDrOPOwEr AND SOLAr PHOTOVOLTAIC POwEr GENErATION PrOjECTSiASIAN DEVELOPMENT BANKR ajat Jain and Shotaro SasakiSeptember 2015 HANDBOOK ON CONSTruCTION TECHNIQUESA PRACTICAL FIELD REVIEW OF ENVIRONMENTAL IMPACTS IN POWER TRANSMISSION/DISTRIBUTION, RUN-OF-RIVER HYDROPOWER AND SOLAR PHOTOVOLTAIC POWER GENERATION PROJECTS Creative Commons Attribution IGO license (CC BY IGO)

3 2015 Asian Development Bank6 ADB Avenue, Mandaluyong City, 1550 Metro Manila, PhilippinesTel +63 2 632 4444; Fax +63 2 636 ; rights reserved. Published in 2015. Printed in the Philippines. ISBN 978-92-9257-123-8 (Print), 978-92-9257-124-5 (e-ISBN) Publication Stock No. TIM157535-2 Cataloging-In-Publication DataAsian Development Bank. HANDBOOK on CONSTruCTION TECHNIquES A practical field review of environmental impacts in power transmission/distribution, run-of-river hydropower and solar photovoltaic power generation City, Philippines: Asian Development Bank, Environment. 2. Power. 3. CONSTruCTION . I. Asian Development views expressed in this publication are those of the authors and do not necessarily reflect the views and policies of the Asian Development Bank (ADB) or its Board of Governors or the governments they represent.

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6 The English original of this work is the only official Any adaptations you create should carry the following disclaimer:This is an adaptation of an original Work Asian Development Bank 2014. The views expressed here are those of the authors and do not necessarily reflect the views and policies of ADB or its Board of Governors or the governments they represent. ADB does not endorse this work or guarantee the accuracy of the data included in this publication and accepts no responsibility for any consequence of their contact or if you have questions or comments with respect to content, or if you wish to obtain copyright permission for your intended use that does not fall within these terms, or for permission to use the ADB : In this publication, $ refers to US : All are and Figures vAbstract viAuthors viiAbbreviations viiiWeights and Measures viiiI.

7 Introduction 1II. CONSTruCTION TECHNIquES and Methodology Used by Project Proponents 4 III Stages of Power Transmission and Distribution Lines Project Design, CONSTruCTION and Related Environmental Impacts and Mitigation 8A. Transmission Lines 11 Design Criteria 11 CONSTruCTION Practice, their Environmental Impacts, Mitigation and Work process 12B. Distribution Lines 36 Design Criteria 36 CONSTruCTION Practice, their Environmental Impacts, Mitigation and Work process 37IV . Stages of Power Substation Project Design, CONSTruCTION and Related Environmental Impacts and Mitigation 45A. Transmission/Distribution Substations 45 Design Criteria 45 CONSTruCTION Practice, their Environmental Impacts, Mitigation and Work Process 47B.

8 Distribution Transformers (below 33 kV) 81 CONSTruCTION Practice, their Environmental Impacts, Mitigation and Work process 81V. Stages of Run-of-River Hydropower Project Design, CONSTruCTION and Related Environmental Impacts and Mitigation 85A. Run-of-River (ROR) Hydropower Project 87 Design Criteria 87 CONSTruCTION Practice, their Environmental Impacts, Mitigation and Work Process 87VI. Stages of Solar Photovoltaic (SPV) Power Generation Project Design, CONSTruCTION and Related Environmental Impacts and Mitigation 134A. Solar Photovoltaic (SPV) Generation Plant 134 Design Criteria 134 CONSTruCTION Practice, their Environmental Impacts, Mitigation and Work Process 135 HANDBOOK on CONSTruCTION TechniquesivVII.

9 CONSTruCTION Related Environment Due Diligence Triggers and General Cumulative Impacts 163A. General Cumulative Impacts During CONSTruCTION , Operations and Maintenance Phase 163B. Monitoring During CONSTruCTION , Operations and Maintenance Phases 165C. Design of O&M Process after Completion of CONSTruCTION 167D. Recommended follow-up Activities for Better Environmental Management after Commissioning 165 VIII. Key lessons in project implementation for designated sector power projects 169A. Environment Related Impacts 169B. Some Non-Environmental Impacts 174IX. Conclusions 176 References 177 Glossary of terms used 178vTables and FiguresTables1 Illustrative Differences in CONSTruCTION Practices followed 52 Transmission Lines- Stepwise Project Activities, CONSTruCTION Impacts, Mitigation, and Work Process Involved 153 Distribution Lines - Stepwise Project Activities, CONSTruCTION Impacts, Mitigation and Work Process Involved 404 Type of Power Substations 485 Transmission/Distribution Substation-Stepwise Project Activities, CONSTruCTION Impacts, Mitigation and Work Process Involved 516 Distribution Transformer CONSTruCTION Activity 837 Hydropower Project.

10 Stepwise Project Activities, CONSTruCTION Impacts, Mitigation and Work Process Involved 928 Small Hydropower Projects CONSTruCTION Activity 1319 Solar Power Project - Stepwise Project Activities, CONSTruCTION Impacts, Mitigation and Work Process Involved 13810 General Cumulative Impacts During CONSTruCTION , Operations and Maintenance 16311 Project Monitoring Required During CONSTruCTION , Operations and Maintenance 16612 Key Lessons in Project Implementation in Designated Power Sectors 16913 Non-Environmental Activities that Adversely Impacts Local Area 174 Figures1 Target Power Sector Projects for the study 32 Schematic Diagram of the Transmission/Distribution System 113 Process Flow Chart for CONSTruCTION of Transmission Lines 144 Process Flow Chart for CONSTruCTION of Distribution Line 387 Process Flow Chart for CONSTruCTION of Distribution Transformer 82viAbstractThe report highlights a broad spectrum of environmental impacts triggered due to CONSTruCTION , operations and maintenance and their mitigation for four sectors - power transmission/distribution.