report on environmental and social impact … · (wb8) report on environmental and social impact...

PROJECT CONSTRUCTION INVESTMENT MANAGEMENT

AUTHORITY PROVINCE MANAGEMENT UNIT OF DAM REHABILITATION AND SAFETY

IMPROVEMENT PHU YEN PROVINCE

REPORT ON

ENVIRONMENTAL AND SOCIAL IMPACT

ASSESSMENT

SUBPROJECT: DAM REHABILITATION AND SAFETY

IMPROVEMENT (WB8) PHU YEN PROVINCE

PROJECT: DAM REHABILITATION AND SAFETY

IMPROVEMENT (DRSIP/WB8) FUNDED BY THE

WORLD BANK

Phu Yen, January 2020

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Subproject: dam rehabilitation and safety improvement (wb8) Phu Yen province

Report environemental and Social impact assessment (ESIA) 2

PROJECT CONSTRUCTION INVESTMENT MANAGEMENT

AUTHORITY PROVINCE MANAGEMENT UNIT OF DAM REHABILITATION AND SAFETY

IMPROVEMENT PHU YEN PROVINCE

PROJECT: DAM REHABILITATION AND SAFETY IMPROVEMENT

(WB8)

REPORT ON

ENVIRONMENTAL AND SOCIAL IMPACT

ASSESSMENT

SUBPROJECT: DAM REHABILITATION AND SAFETY

IMPROVEMENT (WB8) PHU YEN PROVINCE

REPRESENTATIVE OF THE PROJECT

OWNER

REPRESENTATIVE OF THE

CONSULTANCY UNIT

Phu Yen, January 2020

Subproject: dam rehabilitation and safety improvement (WB8) Phu Yen province

Report on Environemental and Social Impact Assessment (ESIA) 3

LIST OF ABBREVIATIONS

AH Affected Household

CPC Communal People’s Committee

CPO Central Project Office

DPC District People’s Committee

DSR Dam Safety Report

DRSIP Dam Rehabilitation and Safety Improvement

DED Detailed Engineering Design

ECOPs Environmental Code of Practice

SA Social Assessment

EIA Environment Impact Assessment

ESMF Environment and Social Management Framework

EMDF Ethnic Minority Development Framework

EMDP Ethnic minority Development Plan

EM Ethnic minority

EMP Environement Management Plan

ESIA Environment and Social Impact Assessment

ESMP Environment and Social Management Plan

FPIC Free, prior and informed consultation

IPM Integrated Pest Management

ICM Integrated Crop Management

MARD Ministry of Agriculture and Rural Development

MCM Million Cubic Meters

MoIT Ministry of Industry and Trade

MoNRE Ministry of Natural Resources and Environment

WB World Bank

FFS Farm Field School

O&M Operation and Maintenance

OP/BP Policies of World Bank

GAP Gender Action Plan

IDA International Development Agency

RAP Resettlement Action Plan

PPC Provincial People’s Committee

PMU Project Management Unit

PMB Project Management Board

PoE Panel of Experts

PPMU Provincial Project Management Unit

PSC Project Steering Committee

SRI System Rice Intensification

TOF Training of farmers

VND Vietnamese dong

TOR Terms of Reference

UNDP United Nations Development Program



WHO World Health Organization

WUA

UXO

Water Users Association

Unexploded ordnance



TABLE OF CONTENT

LIST OF ABBREVIATIONS ................................................................................................................3

TABLE OF CONTENT .........................................................................................................................5

LIST OF TABLES .................................................................................................................................8

LIST OF FIGURES .............................................................................................................................10

SUMMARY ..........................................................................................................................................11

CHAPTER I: PROJECT INTRODUCTION ....................................................................................18

1.1. Approach and method of implementation ................................................................... 18

1.1.1. Methods of social impact assessment ...................................................................... 18

1.1.2. Environment impact assessment method ................................................................ 19

1.2. Implementation arrangement of ESIA report ............................................................. 20

CHAPTER II: DESCRIPTION OF SUBPROJECT ........................................................................22

2.1. Objective of the subproject ............................................................................................ 22

2.2. Location of subproject implementation ........................................................................ 22

2.3. Status of works and construction solutions .................................................................. 23

2.4. Summary of excavation volume, construction materials and machinery ................ 36

2.4.1. Summary of excavation volume ............................................................................... 36

2.4.2. Summary of volume of materials ............................................................................. 36

2.4.3. Mobilization of vehicles and machinery for construction ...................................... 37

2.4.4. Distance, transport route of materials ..................................................................... 39

2.5. Auxiliary items ................................................................................................................ 40

2.5.1. Electricity, water for construction and living .......................................................... 40

2.5.2. Demand for workers’ houses and camps ............................................................... 40

2.5.3. Construction route .................................................................................................... 40

2.5.4. Landfill, soil pits ....................................................................................................... 42

2.6. Pre-construction activities .............................................................................................. 44

2.7. Material transportation plan ......................................................................................... 44

2.8. Operational and maintenance activities ....................................................................... 44

2.9. Dam safety plan ............................................................................................................... 44

2.10. Subproject implementation schedule ............................................................................ 45

2.11. Cost of implementation ................................................................................................... 46

CHAPTER 3: LEGAL, ADMINISTRATIVE AND POLICY FRAMEWORK ............................47

3.1. Government Regulation ................................................................................................. 47

3.2. The World Bank’s safeguard policies ........................................................................... 50

3.2.1. Project level ............................................................................................................... 50

3.2.2. Subproject level ......................................................................................................... 50

CHAPTER 4: NATURAL, SOCIO-ECONOMIC CONDITIONS AND ENVIRONMENTAL

STATUS ................................................................................................................................................57

4.1. Natural conditions ........................................................................................................... 57

4.1.1. Geographical and geological conditions ................................................................. 57

4.1.2. Topographic and geological conditions .................................................................. 57

4.1.3. Climate and meteorological conditions ................................................................... 58

4.1.4. Hydrological conditions............................................................................................ 60

4.1.5. Biodiversity ................................................................................................................ 67

4.2. The impact of climate change on Phu Yen province ................................................... 69

4.2.1. Types of natural disasters often occur in Phu Yen province ................................. 69



4.2.2. The impact of climate change on Phu Yen province .............................................. 70

4.3. Environmental status ...................................................................................................... 70

4.3.1. Quality of ambient air environment and nois ......................................................... 71

4.3.2. Environmental quality of surface water .................................................................. 71

4.3.3. Quality of groundwater environment ...................................................................... 71

4.3.4. Quality of soil environment ...................................................................................... 71

4.4. General socio-economic characteristics of sub-project areas .................................... 72

4.4.1. Socio-economic characteristics of subproject communes ...................................... 72

4.4.2. Survey result of households benefited from subproject.......................................... 80

4.5. Sensitive works ................................................................................................................ 92

CHAPTER 5: ENVIRONMENTAL AND SOCIAL IMPACT ASSESSMENT ............................95

5.1. Types and scale of impacts ............................................................................................. 95

5.2. Potential positive impacts on environment and society .............................................. 96

5.2.1. Potential negative impacts from the subproject on the social environment .......... 96

5.2.2. Assessment and forecasting of impacts during the process of preparing the subproject ................................................................................................................................. 96

5.2.3. Impact evaluation and projection during subproject construction phase ........... 106

5.2.4. Predictors of specific impacts ................................................................................. 133

5.2.5. Evaluating and forecasting of impacts during the operational phase of the subproject ............................................................................................................................... 138

5.3. Analysis of types of impact ........................................................................................... 138

5.3.1. Cumulative impacts................................................................................................. 138

5.3.2. Direct Impact ........................................................................................................... 139

5.3.3. Indirect impacts ....................................................................................................... 139

5.3.4. Temporary impact ................................................................................................... 139

5.3.5. Long term impact .................................................................................................... 139

CHAPTER VI: ALTERNATIVE ANALYSIS ................................................................................140

6.1. Without subproject ....................................................................................................... 140

6.2. The option of implementing the sub-project .............................................................. 141

CHAPTER VII: ENVIRONMENTAL AND SOCIAL MANAGEMENT PLAN (ESMP) .........145

7.1. Objectives ....................................................................................................................... 145

7.2. Mitigation measures ...................................................................................................... 145

7.2.1. Impact mitigation measures in the subproject preparation measures ................. 145

7.2.2. C Mitigation measures during construction phase ............................................... 147

7.2.3. Mitigation measures for specific impacts .............................................................. 170

7.2.4. Mitigation measured in operation phase ............................................................... 175

7.3. Implementation arrangement ...................................................................................... 176

7.3.1. Project management ............................................................................................... 176

7.3.2. Roles and responsibilities for environmental and social safeguard management177

7.4. Environmental Compliance Framework .................................................................... 181

7.4.1. Environmental tasks of the Contractor: ................................................................ 181

7.4.2. Contractor’s safety, social and environmental officer ......................................... 181

7.4.3. Social and environmental monitoring during construction phase (Monitoring Consultant) ............................................................................................................................. 182

7.4.4. Compliance with contract requirement and legal regulations ............................. 182

7.4.5. Report System .......................................................................................................... 183

7.5. Grievance redressing mechanism ................................................................................ 184



7.5.1. Complaints and complaint settlement procedures ................................................ 184

7.5.2. Contractor and construction supervision consultant: .......................................... 185

7.5.3. Grievance redressing mechanism of WB .............................................................. 185

7.6. ESMP Implementation plan ........................................................................................ 186

7.6.1. ESMP Implementation Plan of the Contractor .................................................... 186

7.6.2. Subproject commencement and personnel ............................................................ 186

7.7. Capacity development and training plan ................................................................... 186

7.7.1. Training on safety policies ..................................................................................... 186

7.7.2. Occupational health and safety training ............................................................... 187

7.7.3. Orientation of visitors ............................................................................................. 187

7.7.4. Training for new contractors and workers ........................................................... 187

7.7.5. Basic training on occupational health and safety ................................................ 187

7.8. Environmental quality monitoring plan ..................................................................... 188

7.8.1. The compliance monitoring ................................................................................... 188

7.8.2. Monitoring of environment quality ....................................................................... 188

7.8.3. Dam safety monitoring ........................................................................................... 190

7.9. Estimated cost ................................................................................................................ 190

CHAPTER VIII: COMMUNITY CONSULTATION AND INFORMATION DISCLOSURE 197

8.1. Purpose and method ..................................................................................................... 197

8.1.1. Purpose of community consultation ...................................................................... 197

8.1.2. Principles of community consultation ................................................................... 197

8.2. Consultation process ..................................................................................................... 198

8.2.1. Brief description of consultation process at commune/town level and mass organizations .......................................................................................................................... 199

8.2.2. Summary of consultations with community directly affected by Subproject ...... 200

8.3. Results of public consultation ...................................................................................... 200

8.4. Feedback and commitment of the Project Owner..................................................... 206

8.5. Information Disclosure ................................................................................................. 207

CONCLUSIONS AND RECOMMENDATIONS ...........................................................................208

Conclusion .................................................................................................................................... 208

Recommendations ....................................................................................................................... 208

REFERENCES ...................................................................................................................................209

ANNEX................................................................................................................................................210



LIST OF TABLES

Table 1: The list of reservoirs under the subproject of “Dam rehabilitation and Safety Improvement

(WB8), Phu Yen province” .....................................................................................................................11

Table 2: Cost estimate for ESMP implementation .................................................................................16

Table 3: List of persons participating in implementation ......................................................................21

Table 4: Geographic location of reservoir under the subproject ..........................................................22

Table 5: Summary of some specifications of reservoirs .........................................................................23

Table 6: Summary of current information of reservoirs and construction works of the Subproject ......24

Table 7: Total volume of excavated soil and embankment soil of the subproject ..................................36

Table 8: Summary of materials volume of the subproject ......................................................................36

Table 9: list of machines and equipment for construction of subproject ...............................................37

Table 10: Distance, transport route of materials ...................................................................................39

Table 11: Expected number of workers in construction sites ................................................................40

Table 12: Volume and location of landfill, transportation routes .........................................................42

Table 13: Volume and location of soil pits during construction ............................................................43

Table14: Progress implementation of subproject ..................................................................................46

Table 15: Cost of implementation of subproject ....................................................................................46

Table 16: Summary of environmental assessment process of WB & Government .................................52

Table 17: Distribution table of air temperature characteristics ............................................................58

Table 18: Table of distribution of relative humidity characteristics (Unit:%) ......................................59

Table 19: Table of wind speed in months of the year (Unit: m/s) ..........................................................59

Table 20: The amount of evaporation of the months of the year (Unit: mm) .........................................59

Table 21: Rainfall design irrigation area ..............................................................................................60

Table 22: Average rainfall for years, months ........................................................................................60

Table 23: The watershed characteristics of the reservoirs under the subproject .................................60

Table 24: Result of calculating the annual flow characteristics ............................................................60

Table 25: Calculation table of results for the design year flow .............................................................61

Table 26: Distribution table of design annual flow ...............................................................................61

Table 27: Results table of flood peak flow calculations Qmax ..............................................................62

Table 28: Chart flood diagram of reservoirs belong subproject ..........................................................63

Table 29: Details on socio-economic conditions of subproject communes ...........................................75

Table 30: Average number of demographics participated in the survey ...............................................80

Table 31: Gender of surveyed people ....................................................................................................80

Table 32: Age of surveyed people ..........................................................................................................81

Table 33: Size of households participating in the survey .......................................................................81

Table 34: Ethnic minority composition of respondents ..........................................................................82

Table 35: Education level of surveyed people ........................................................................................83

Table 36: Occupation of the respondents ..............................................................................................83

Table 37: Total income of households in the subproject area ...............................................................85

Table 38: Type of housing of the household...........................................................................................86

Table 39: Distance from home to service points in the subproject area ................................................87

Table 40: Water source used for eating and daily activities of households ...........................................87

Table 41: State of using toilet of household ...........................................................................................88

Table 42: Gender in local community participation (%) .......................................................................89

Table 43: Division of labor by gender in production and living (%) .....................................................89

Table 44: Gender in making decision in family (%) ..............................................................................90



Table 45: Poverty situation of ethnic minority people in the districts of the subproject .......................90

Table 46: Situation of ethnic minorities in the project communes (people) ...........................................91

Table 47: Understand the nature of HIV/AIDS ......................................................................................91

Table 48: Awareness about the way of HIV / AIDS transmission ..........................................................91

Table 49: Awareness of people about HIV/AIDS (%) ............................................................................92

Table 50: Summary of the status of sensitive works ...............................................................................92

Table 51: The criteria for classification of negative impacts ................................................................95

Table 52: Sources of impact during construction preparation phase ....................................................97

Table 53: Statistics of impacts and scope of land acquisition ...............................................................99

Table 54: Summary of affected trees and crops ...................................................................................100

Table 55: Pollutant load coefficient for trucks running on roads ........................................................101

Table 56: Number of vehicles transporting luminescent vegetation ....................................................102

Table 57: Pollutant load emissions of means of transport of transportation of luminescent vegetation

..............................................................................................................................................................102

Table 58: : Pollutant load emissions of means of transport of transportation of luminescent vegetation

in 1hour ................................................................................................................................................102

Table 59: Concentrations of pollutants in the air due to transportation of luminescent plants in

reservoirs of Phu Xuan, Dong Tron, Hon Dinh, Hoc Ram and Dong Khon ........................................103

Table 60: Concentrations of pollutants in the air due to transportation of luminescent plants in

reservoirs of Gieng Tien; Ea Ddin1, Hoa Thuan .................................................................................104

Table 61: Biomass of 1m2 of vegetation type.......................................................................................105

Table 62: The amount of biomass generated during the preparation stage .......................................105

Table 63: Summary of source of impact during construction phase ....................................................106

Table 64: Aggregate volume of air and dust pollutant emission sources ............................................109

Table 65: Volume of construction materials ........................................................................................110

Table 66: Pollutant load of means of transport of transportation of luminescent vegetation in 1hour

..............................................................................................................................................................110

Table 67: Concentrations of pollutants in the air from the transportation of construction materials are

swept away by the wind ........................................................................................................................111

Table 68: Pollutant load coefficient for trucks running on roads (for 1000 km) .................................111

Table 69: Number of turns transport vehicles......................................................................................112

Table 70: Load of pollutants from cars transporting materials ...........................................................112

Table 71: Concentration of pollutants through transport of materials ................................................113

Table 72: Forecast of oil consumption in construction activities at the construction site ...................113

Table 73: Load of pollutants from machinery and equipment during construction .............................114

Table 74: Concentration of pollutants from the operation of construction machinery........................114

Table 75: Pollution emission coefficient due to construction activities ...............................................115

Table 76: The amount of dust generated by the excavation and embankment and leveling process at

the construction site .............................................................................................................................116

Table 77: D ust concentration due to operation to excavation and embankment ................................116

Table 78: Calculation results of noise level at source during construction phase ..............................117

Table 79: Forecast of noise reduction according to distance from source ..........................................118

Table 80: Vibration level decreases with the distance in construction ................................................120

Table 81: Estimates of sources of substances causing water contaminants ........................................122

Table 82: Concentration of pollutants of domestic wastewater during construction phase ................122

Table 83: Concentration of pollutants in construction waste water ....................................................123

Table 84: Predict potential soil erosion due to rain from construction items of the subproject ..........124



Table 85: Estimated volume of excavation, embankment and domestic waste generated from

subproject construction activities .........................................................................................................125

Table 86: Beneficial area and number of HHs likely to be affected due to interruption of irrigation

water supply during the subproject construction .................................................................................129

Table 87: Specific impacts of the subproject........................................................................................134

Table 88: Cost estimate for compensation and resettlement................................................................146

Table 89: Environmental code of practices (ECOP) to mitigate general impacts during the

construction process .............................................................................................................................149

Table 90: Mitigation measures for sensitive works ..............................................................................170

Table 91: General mitigation measures for impacts during operation phase .....................................175

Table 92: Roles and responsibilities of stakeholders ...........................................................................178

Table 93: Requirements on report system ............................................................................................183

Table 94: Summary of the contents of quality monitoring of environmental components in the

construction phase and operation and maintenance ............................................................................189

Table 95: Estimated costs for ESMP ....................................................................................................190

Table 96. Budget source for ESMP monitoring ...................................................................................190

Table 97: Summary of mitigation measures .........................................................................................192

Table 98: Time and location of consultation meeting ..........................................................................199

Table 99: Summary of consultation results and project owner comments ...........................................200

Table 100: Summary of consultations on environmental and social issues of affected households ....206

LIST OF FIGURES

Figure 1: Locations of subproject reservoirs .........................................................................................23

Figure 2: Map of the administrative units of Phu Yen province ............................................................57

Figure 3: Structure of environmental management and supervision organization..............................176

Figure 4: Organizational chart of subproject safeguard performance................................................177



SUMMARY

1. Introduction: The project of: “Dam rehabilitation and Safety Improvement (DRSIP/WB8) funded by the World Bankwas approved by Prime Minister in accordance with the Decision No.

1858/QĐ-TTg dated 02/11/2015 and the Feasibility Study Report of the project was approved by

Minister of Ministry of Agriculture and Rural Development through Decision No. 4638/QĐ-NN-

HĐQT dated 09/11/2015.

2. Subproject: dam rehabilitation and safety improvement (WB8) Phu Yen province, PPMU issued Decision No. 61 / QD-BQL-WB8, dated 08/6/2017 on approving the plan for selecting contractors for

investment preparation phase (phase 2); No. 20 / QD-BQL-WB8, dated January 23, 2018, approving

the results of evaluation of documents presenting interest in package number C1-PHUYEN-CS1; No.

69 / QD-BQL-WB8, dated March 26, 2018, approving the results of contractor selection of package

number C1-PHUYEN-CS1: Consultancy for preparation of Feasibility Study Report and Dam Safety

Report under the Dam Safety Repair and Improvement sub-project in Phu Yen Province. Accordingly,

the subproject includes 8 water reservoirs:

Table 1: The list of reservoirs under the subproject of “Dam rehabilitation and Safety Improvement

(WB8), Phu Yen province”

No. Name of

reservoirs

Capacity

(x106 m3)

Height of

dam

(m)

Construction

level Location of the subproject

1 Phu Xuan 11.22 23.80 II Xuan Phuoc commune, Dong Xuan

district

2 Dong Tron 19.55 29.00 II An Nghiep commune, Tuy An

district

3 Hon Dinh 0.710 4.70 IV Hoa Xuan Tay commune, Dong Hoa

district

4 Gieng Tien 1.45 7.60 IV Son Ha commune, Son Hoa district

5 Dong Khon 2.716 16.20 III Hoa Xuan Tay commune, Dong Hoa

district

6 Hoc Ram 2.91 17.80 II Hoa Tan Tay commune, Tay Hoa

district

7 EaDin 1 1.45 13.00 III Ea Bar Commune, Song Hinh

District

8 Hoa Thuan 1.45 9.00 IV Son Dinh commune, Son Hoa

district

3. The status of reservoirs under the subproject “Dam rehabilitation and safety improvement (WB8) Phu Yen province: Most of reservoirs are homogeneous earth dams which have been exploited

for a long time and have not been upgraded, resulting in deterioration, damage, and weakness in

preventing flood. Main items of the works are likely to cause unsafety. In addition, most of the works

were built between 1983 and 2004 basing on hydrological documents, natural conditions, design

standards which are no longer suitable for the situation of climate change, especially the current

complex climate change. Facing with the above mentioned situation, repairing, upgrading and

ensuring of safety for the works is very necessary

Head works will be repaired and upgraded; ensure safety for reservoirs in exploitation and operation;

ensure irrigation water supply for 4,509.05 ha of agriculture land.

Status of reservoirs is presented in details in Annex 2.2.1 of this report.

4. Description of the subproject. The construction items of the subproject are implemented in 8 reservoirs, with the aim of supporting the implementation of the Program to ensure safety of reservoirs

through repair, reinforcement, upgrading of priority dams, strengthening of management capacity and

safe operation of dams to protect people specifically residence and socio-economic infrastructure in

the downstream area.

Specific objectives:

a) To secure the safety of reservoirs and key works.



b) To improve the efficiency of irrigation works in service of intensive cultivation, increase productivity and quality of products, develop specialized areas of high yielding and high

economic value, maximize potential of agricultural land in the region.

c) To reduce water loss, to ensure the water demand for people's life, the development of local industries, and socio-economic development in the subproject area in particular and Phu Yen

province in general.

d) To create natural landscapes, improve the ecological environment, promote tourism development in the region.

Construction items:

a) Repairing, upgrading soil dams, reinforcing dam crest, repairing upstream slope, downstream slope, reworking slope drainage systems and treating dams;

b) Repair, replace water intake culverts depending on the extent of damage;

c) Reinforce and renew to improve drainage capacity of spillway, it is possible to expand flood discharge spillways and overflow with surface discharge gates or self-fuse spillways;

d) Management road: Depending on the current status of each reservoir, construction of concrete pavement structure conforms to rural road standards.;

e) Renovating reservoir managers house: grade IV houses have electricity and water systems for daily life and reservoir management;

f) Monitoring equipment: To build a system of upstream and downstream water level observation posts

5. Results of environmental and social screening: The subproject is not located in or near natural habitats and there is no rare or endangered animals and plants found in the subproject area. There are

also no sensitive construction or monuments that have cultural, religious or historical significance in

and around the subproject. Regarding ethnic minorities, there are 4 communes under the subproject

that have ethnic minorities: Xuan Phuoc, Hoa Tan Tay, Ea Bar, Son Dinh, The ethnic minority groups

here are mainly Cham and Khmer. The subproject will only upgrade the dam on existing reservoirs,

which has been screened for the environment and society and determined that the subproject does not

cause significant impacts on the environment and society in the project implementation area and the

subproject is rated as category B in terms of environmental and social impacts. The World Bank

policies are triggered under the subproject including: OP/BP 4.01 on environmental assessment, OP

4.09 on pest management, OP/BP 4.37 on safety of dams, OP/BP 4.12 on involuntary resettlement;

OP/BP 4.10 Indigenous peoples, and OP/BP 4.11 Physical Cultural Resources.

6. The social and environmental impact assessment aims to identify both positive and negative impacts of the subproject, thereby proposing appropriate mitigation measures to control and manage

those impacts, in order to optimize the benefits of the subproject.

7. Social and environmental impacts of the subproject: The subproject brings both positive and negative impacts.

(a) Positive impacts:

- The subproject will repair and upgrade safety of head works of reservoirs to ensure safety for people and their assets who live in the downstream area, and communes in subproject

and residents of neighboring affected areas;

- After being implemented, the subproject will improve the storing of reservoirs, improve capacity of storing underground water in the nearby area;

- Regularly and sustainably provide irrigation water for agriculture cultivation area in the downstream area;

- Improve landscape in the reservoir area and provide habitat aquatic life.

(b) Negative impacts during pre-construction and construction phases, including:

- The implementation of the subproject will recover the productive land of the households in subproject area. The implementation of the sub-project will permanently acquired a total of



49,274.73 m2 belonged to 16 households and 5 organizations are People's Committees of

communes, in which: 2 crops Rice land: 771.29 m2, Other annual crops land: 1,533.66 m2,

Land for perennial crops: 172,35 m2, Production forest land: 19.121,96 m2, Residential land:

36,17 m2 and: 27,639.3 m2 Public land managed by the CPC includes 12.428,6 m2 Other

annual crops land and 15,146 m2 Unused hilly land and 64,7 m2 Unused land. In addition, the

project will temporarily acquired 14,500 m2 of unused land for landfill purpose.

- According to the results of consultations and interviews in the subproject localities, explosive objects have not been detected in the subproject communes. However, Phu Yen province has

repeatedly discovered explosive objects and has been handled by the authorities. According to

a report on the status of landmine and UXO contamination (Vietnam National Mine Action

Center) Phu Yen province has 9/9 districts (cities and towns) identified as contaminated with

UXO as: Tuy Hoa city, Song Cau town and districts: Dong Xuan, Tuy An, Son Hoa, Song

Hinh, Tay Hoa, Phu Hoa and Dong Hoa; A total of 113/113 communes (wards and towns)

were identified as being contaminated with UXO, accounting for 100%, UXO contaminated

area is 107,950.22 hectares, accounted for 21.4% of the province's natural area. Therefore,

UXO can be found in the construction area or the land mine, stone. In order to minimize risks,

the subproject owner should contact the competent authorities to conduct mine clearance to

assess the risk and provide confirmation of the safety of explosive objects before construction.

- Site clearance activities, create construction ground, transporting waste due to clearance of vegetation, soil stone will create impacts: Dust, exhaust gas, noise, vibration affect

construction workers, people in the subproject area; Wastewater from worker activities and

stormwater runoff with high suspended solids content due to loss of vegetation cover will

affect the quality of receiving water and soil quality in the subproject area; Solid waste of

workers and waste from clearing vegetation cover if not managed well will affect the

surrounding environment and landscape of the subproject area.

- Another activity in the subproject preparation phase is geological exploration drilling. In total, the geological survey unit has drilled 17 boreholes with the depth of 11-40m at the subproject

locations (Specific positions are presented in the feasibility study report of the subproject) to

understand geological conditions and aquifer characteristics, at the same time conducting

geophysical karota in the borehole, If the drilling process is not handled properly, it will affect

the quality of groundwater sources due to the infiltration of pollutants through boreholes to

groundwater.

- The impacts related to construction activities such as noise, vibration, air pollution due to dust and emissions, water pollution, waste, plant and animal ecosystems, social risk due to site

clearance and construction affecting traffic safety, community infrastructure, risk of accidents,

community conflict and infectious disease and disruption of business activities have been also

determined and assessed in the report. Moreover, during the construction process, it may be

blocked water source to construct the works of the subproject which may affect productivity

and water resource serving agriculture of 7 communes in the subproject area. The works of the

subproject are scattered in the 7 communes of 6 districts and the implementation location is

mainly on agriculture land which is far from residential and important areas and does not

affect forestry land; therefore, the negative impacts of the subproject are assessed at low to

average level and can be controlled by a suitable management plan. However, there are still

long term impacts on the subproject area such as land mine and dumping sites which can cause

degradation of agricultural land, unused hill land, and vacant land within the temporarily

borrowed land of localities in the subproject area during the process of using.

(c) Negative impacts during the operational stage:

- Dam safety risks can occur in the event of a broken dam or flood discharge causing flooding downstream; Accident related to drowning;

- Domestic waste from eco-tourism activities in some reservoirs has developed this type of service;

- The implementation of the subproject does not increase the capacity of the reservoir, does not increase the irrigated area in the downstream area and does not affect the crop structure in the

subproject area. However, the repair of the culverts has been damaged and the leakage of



water will be overcome to ensure more stable irrigation water regulation and will provide

adequate irrigation water for the subproject area in the drought season, restore the volume and

initial irrigated area of the reservoir, At that time, the cultivation of agricultural crops for areas

that lack water in the drought season will be restored, on the other hand, when there is enough

irrigation water and water is frequently circulated, it leads to changes in living environment,

creating conditions for harmful organisms and plants to grow, This is also the cause of

outbreaks of diseases and pests for agriculture. Therefore, it will increase the number of

pesticides and fertilizers in the area of water shortage and increase the pest in the subproject

area. On the other hand, the use of chemicals to kill termites in the dam body if not well

managed also affects the surrounding environment if due to residue and disposal is not in the

right place or termite-killing chemicals are swept away by rainwater. Therefore, an integrated

pest management (IPM) plan for this subproject is required;

- During maintenance, repairs can stop provision of irrigation water temporarily affecting production and livestock of downstream people..

8. Mitigation measures for impacts: To manage these impacts, an Environmental and Social Management Plan (ESMP) has been prepared as an integral part of this ESIA report with proposed

institutional arrangements for impact management, environmental management and monitoring,

reporting requirements, capacity building, budgeting for implementation. The social assessment report

(SA) is made to aim at the following objectives: (i) Identify social issues and potential impacts of

proposed infrastructure investment items, (ii) Provide input of social aspects and participation in the

feasibility study project design and basic design phase, paying attention to the needs of affected

communities, (iii) Provide specific recommendations on infrastructure investment management with

high social risks and identify criteria and methodologies to determine whether the investment is

socially acceptable or not, (iv) The study provides a basic source of data for evaluating project

completion results. A separate Resettlement Action Plan/Compensation and Resettlement plan has

been prepared to deal with the impacts of land acquisition.

Preparation phase:

- Implement RAP; SA.

- Integrating environmental mitigation measures into technical design.

- Consult people about the actual time of repairing dam with purpose of mitigating impacts of three phases: preparation, construction of subproject and operation of subproject.

- Demining and demining should be carried out strictly and fully in the subproject implementation area. It is necessary to hire a unit with full functions and tasks of according to

state regulations.

- During the geological exploration drilling process, it is necessary to strictly follow exploration drilling techniques. The boreholes need to be backfilled ensuring no spillage of pollutants to

the drilled hole and infiltrationinto the aquifer.

- Waste from the site clearance process has a small quantity but needs to be transported in the right place or coordinate with the local authorities to handle the regulations..

- Putting provisions on implementing mitigation measures into construction bidding documents and construction contracts.

Construction phase:

- Require contractors to strictly and fully implement mitigation measures for the impacts mentioned in the Environmental and Social Impact Assessment Report, social impact

assessment report of the subproject and negative impacts during construction phase will be

minimized through ECOPs and mitigation measures for site-specific impacts.

Operation phase:

- During the operational process, the upgraded and repaired items of the subproject such as: anti- seepage on dam body, treatment of loss of water due to damaged items will improve the

capacity of storing of water and ensure the capacity of regulating water through repairing of

intake. Thus, it will increase irrigation area that has been not provided enough for designed



irrigation area because of losing water of reservoirs. Therefore, introduction and promotion of

application of integrated pest management in the areas of irrigation services are necessary.

- PPMU frequently monitor to ensure that the damaged structures will be repaired and restored in accordance with approved dossier. Reservoir management units regularly check dam safety,

patrol the Reservoir area to avoid drowning accidents; forecast and warning to authorities and

people when there are extreme weather phenomena; Regularly collect garbage at the reservoir

area, for reservoirs operating in tourism business, there must be garbage bins and coordinate

with garbage collection units in localities to collect daily. On the other hand, the PPMU and

the reservoir management and operation units must coordinate with the local authorities to

carry out the training on emergency response plans for local authorities and local people..

- For the impact of increased use of pesticides, agencies: Plant Protection Department of Phu Yen province; Plant Protection Station of districts under the subproject; and the People's

Committee of 7 communes under the subproject must comply with the contents of the Pest

Management Plan (IPM) of this subproject. In addition, farmers in the process of cultivation

need to select good varieties, regularly check pests and diseases, use pest control measures

recommended in the pest management plan (IPM) such as: (i) Cultivation measures: Soil

preparation, field cleaning; rotation, intercropping; proper time; sowing and planting

reasonable density; use fertilizer properly; Appropriate care measures (ii) Use of breeds:

Traditional varieties and proposed varieties suitable for local conditions (iii) Biological

measures: taking advantage of using natural enemies available in the field, using bioproducts

…(iv) Chemical measures: use safe pesticides with natural enemies; follow economic

threshold ... Follow safety guidelines on pesticide storage, transportation and use to minimize

negative environmental and health impacts...

9. Preparation of a report on environmental and social impact assessment. The subproject is designed and implemented in accordance with the DRSIP project's Environmental and Social

Management Framework (ESMF) approved by WB, and also ensure compliance with the current

environmental regulations of the GoV. The purpose of the Environmental and Social Impact

Assessment Report is to determine the importance of environmental and social issues in the decision-

making process by clearly assessing the environmental and social consequences of proposed research

before the implementation of subproject activities. Early identification and characterization of the

positive and negative environmental and social impacts that help the community and local have an

assessment of the subproject's environmental and social impacts propose conditions to be applied to

mitigate or mitigate risks to those impacts. Activities in the preparation, construction and operation of

the subproject are analyzed, evaluated and given solutions to prevent and minimize the level of

impacts on the environment and living of the residents direction. Results of screening of 8/8 reservoirs

all meet the criteria of the project and subproject is classified as category B in terms of environment

assessment. The subproject triggers 04 safeguards policies, including: OP/BP 4.01 on environmental

assessment, OP 4.09 on pest management, OP/BP 4.37 on safety of dams and OP/BP 4.12 on

involuntary resettlement.

10. Institutional Arrangements: The Ministry of Agriculture and Rural Development (MARD) is responsible for implementing and managing the entire project. Provinces that perform repairs to dams

in Component 1 and MARD will coordinate activities with the Ministry of Industry and Trade and the

Ministry of Natural Resources and Environment in Component 2. Central Management Board

(CPMU) under MARD is responsible for coordination and overall monitoring of the project. The

implementation of repairs and preparations for the dam safety plan, including protection and

entrustment, is focused on provincial authorities. Provincial People's Committee is the chair of the

provincial level. The Provincial Project Management Unit (PPMU) is responsible for managing and

monitoring the works with support from CPMU. Management Unit of Dam rehabilitation and Safety

Improvement (WB8), Phu Yen province (hereinafter referred to as PMU) responsible for

implementing and monitoring implementation ESIA. The PMU ensures that documents and contracts

for valid bidding include environmental provisions for contractors to comply with. The contractor will

carry out construction activities and comply with the environmental agreements agreed in the contract.

In particular, the contractor will prepare an Environmental and Social Management Plan for the PMU

to review and approve before starting construction. PMU and consultants will closely monitor

compliance with contractor's agreed mitigation measures. In addition, the contractor's compliance will

be closely monitored by Department of Natural Resources and Environment of Phu Yen province,



local authorities and people.

11. Capacity building: During the implementation process, PPMU receives support from CPMU on the World Bank's environmental safety policy. The PPMU's safety policy staff has been trained by

CPMU in coordination with the World Bank experts to guide the project's environmental safety issues

and World Bank's safety policies. related to the project implementation included: OP 4.01

(Environmental Assessment), IFC's General Guide to Environment, Health and Safety (EHS), OP 4.04

(Natural Habitats), OP 4.10 (Indigenous peoples) and OP 4.12 (involuntary resettlement)…

12. During the implementation of the subproject, training and training on environmental safety policies for Construction Supervision Consultant (CSC) and EHS staff of the contractor are carried out

regularly to update the relevant information. For PPMU, during the implementation of the subproject,

the subproject will receive regular support from CPMU's independent consultancy and technical

assistance on the management of dam safety risk issues, monitoring the implementation of the ESMP.

13. Public consultation: The subproject has applied different methods and techniques to conduct public consultations, consultations with people affected and local NGOs by the subproject, including

a) community meetings, b) household survey, c) focus group discussion, field investigation and

interviewing people providing key information. The use of these methods and techniques to enhance

the reliability and effectiveness of feedback from the subproject stakeholders, Especially the local

people are affected and make sure that (i) Affected people receive full information about the

subproject; and (ii) All affected people are involved in the process of freedom consultation, advance

notice and provide complete information during the preparation and implementation process. In

September 2018, the sub-project management board organized a total of 7 community consultation

meetings in the sub-project communes. And there have been official documents sent to the People's

Committees of 7 communes under the subproject to community consultation on environmental and

social protection issues during the subproject implementation process. Participants in community

consultation sessions are representatives of local units and organizations such as: representative offices

of People's Committees, in charge of neighborhoods, veterans' associations, women's union, youth

union, the eldly group ... and representatives of affected households.

14. Cost estimation for ESMP implementation: ESMP implementation cost estimate includes costs for ESMP monitoring, mitigation measure implementation and capacity building. Mitigation measure

implementation cost shall be included in the construction cost. The following table presents cost

estimates for monitoring and capacity building.

Table 2: Cost estimate for ESMP implementation

No. Cost item Amount (VND) No.

1 Costs for environmental monitoring VND 685,115,631.2

2 Cost of capacity building training VND 102,000,000 3 Costs for environmental treatment works VND 226,000,000 4 Cost for IPM program VND 82,250,000 5 Contingency (10%) VND 109,536,563.12 6 Total VND 1,204,902,194.32

Grievance Redress Mechanism (GRM): Complaints related to the subproject will be resolved by

negotiating to get an agreement with the people. Complaints will be negotiated by the parties at all

three stages (People's Committee at commune, district and provincial levels) before submitting to the

court in accordance with the 2011 Complaint Law. PPMU will pay all administrative and legal costs

related to the receipt of the complaint because this payment cost is included in the subproject budget.

15. Information dissemination: In compliance with policy of OP 4.01 and policies of World Bank on access to information: from the stage of preparing the subproject, relevant information has been

disseminated to community through mass media. PPMU disseminated information and directly

consulted community in September 2018 and sent consultation information to local organizations. The

draft of ESIA in Vietnamese was sent to CPCs to disseminate information and consult in October

2019. The final version is expected to be disclosure in August 2019 through the website of CPO and

website of the Bank in English before appraisal of the subproject.

16. Conclusion: Subproject: dam rehabilitation and safety improvement (WB8) Phu Yen province may have negative impacts in the subproject phases, but due to the small scale of construction items,



impacts will occur in a short time, The scope in the area is small and insignificant, so the sub-project

has proposed feasible mitigation measures, suitable to the natural, socio-economic conditions and the

conditions of subproject management and construction at localities.

17. The Environmental and Social Monitoring and Management Plan is set up to monitor impacts, to help stakeholders and local authorities to regularly update the implementation process of subproject

items. The monitoring system is prepared and approved by the WB will apply in the implementation

of subproject, construction supervision consultants regularly check and prepare monthly reports to

submit PPMU.



CHAPTER I: PROJECT INTRODUCTION

18. The Government of Vietnam received a credit from International Development Agency (IDA)/ World Bank (WB), via Loan Agreement No.5749-VN signed on 8 April 2016 for financing Dam

Rehabilitation and Safety Improvement Project. The project is implemented from 8 July 2016 until 30

June 2022.

19. The WB funded Dam Rehabilitation and Safety Improvement Project (DRSIP/WB8) was endorsed by the Prime Minister in the project list “dam rehabilitation and safety improvement” in Decision

No.1858/QD-TTg dated 2 November 2015 and the Project Feasibility Study Report was approved by

Minister of Agriculture and Rural Development in Decision No. 4638/QD-NN-HDQT dated 9

November 2015.

20. The project has 03 components and total investment cost of USD 443 million, including USD 415 million of ODA loan from WB and USD 28 million of counterpart fund. The funding allocations to

Component 1, 2 and 3 are USD 412 million, USD 20 million and USD 11 million respectively.

- Component 1: Dam safety rehabilitation, budget: USD 412 million.

- Component 2: Dam safety management and planning, budget: USD 20 million.

- Component 3: Project management support, budget: USD 11 million.

21. The project is implemented in three regions: i) Northern region covering the whole Red River Delta; ii) Central Region covering Central Northern and Middle areas and Central Southern coastal

areas; and iii) Central Highlands area. These are regions with a large number of dams which were built

a long time ago, have rarely received investments for big repair or rehabilitation while being

vulnerable to natural disasters and subject to dam safety incidents.

22. The project shall assist to restore structure of the existing irrigation dams, most of which were built in the 1980s and 1990s. About 90% of the dams proposed to be rehabilitated are earth and small

ones with height lower than 15m and design capacity of smaller than 3 million cubic meters (MCM).

The proposed project will not support to change the structure or expand the dam for safety securing.

Rehabilitation shall be limited to restoring structure of main and auxiliary dams, stabilizing dam

slopes with concrete slabs or stone paving, strengthening and expanding the existing spillways to

increase discharge capacity, renewing the existing intakes, replacing equipment and power system of

the outlet/discharges and controlled spillway, uniting for leakage control and current access road

improvement.

1.1. Approach and method of implementation

23. The Environmental and Social Impact Assessment (ESIA) was implemented in accordance with World Bank safeguard policies and in accordance with the Environmental and Social Management

Framework approved by the World Bank. The ESIA process have been carried out in accordance with

the initial screening process to classify the magnitude of the subproject's environmental and social

considerations, impact assessments, propose mitigation measures and establish implementation plan.

And the consultation with stakeholders and information disclosure were also mainstreamed in this

process. In addition, ESIA is also implemented in accordance with the guidelines of relevant safeguard

policies of the World Bank and regulations of the Government of Vietnam. The purpose of

implementing ESIA is to determine the scope, extent and importance of the environmental and social

issue of the implementation of the project, being suitable with the nature, activities and characteristics

of the subproject area to propose management plan and suitable implementation institution to propose

the positive effects and control negative impacts as well as risks from the subproject.

1.1.1. Methods of social impact assessment

24. Social assessment (SA), which is implemented in parallel with environmental assessment of the sub-project, has two objectives: First, to review potential and negative impacts of sub-projects on the

basis of sub-project implementation plans, and second, to seek potential negative impacts from

designing solutions and proposing community development activities that are relevant to the

development objectives of the sub-project. Identification of negative impacts, and consultations with

localities, Government agencies, project stakeholders, etc. will be undertaken to ensure that affected

people are compensated and supported in a satisfactory and timely manner so that at least their socio-



economic activities are recovered to a level equivalent to that before the project implementation and,

in the long term, their livelihoods will not deteriorate, as a result of the sub-projects.

25. A part of the social assessment is ethnic minorities (EM) living in the sub-project area - they are assessed and confirmed their presence in the sub-project area through the screening of ethnic

minorities (according to OP 4.10 of the Bank), the people will be informed prior to consultations in an

appropriate manner to determine the support to the community when implementing the sub-project.

Ethnic minority screening is implemented in accordance with the World Bank's OP 4.10 guidelines,

and is conducted within the scope and area of social assessments corresponding to the scope of the

environmental assessment (OP 4.01).

26. A Gender analysis is also implemented as part of the SA to describe gender characteristics in the sub-project area, enabling the integration of gender issues into promoting gender equality and further

enhancing the effectiveness of developing the sub-projects in particular, and the whole project in

general. Depending on the size of the Project's potential impacts, which have been identified, and the

project development objectives, a gender action plan and a monitoring plan for gender action plan

have been prepared.

27. To ensure that all potential impacts can be identified during project preparation, SAs are conducted through consultations with various sub-projects stakeholders. An important part of concern

is households, who are potentially affected by the Project (both positively and negatively). The

techniques used to make an SA include (i) reviewing secondary data, (ii) field observations; (iii) focus

group discussions/ community meetings, (iv) in-depth interviews, and (v) household surveys.

1.1.2. Environment impact assessment method

28. During the research, survey and preparation of ESIA report, the consultant team used a combination of the following research methods.

(1) Rapid Assessment Method

29. The Rapid Assessment Method was issued by the World Health Organization (WHO) in 1993. The rapid assessment method is based on the nature of materials, technology, the rules of natural

processes and experience to determine the pollutant load.

30. In Vietnam, this method has been introduced and applied in many ESIA studies, which performs relatively accurately the calculation of pollutant load under limited conditions of instrumentation and

analysis. In this report, the pollutant load coefficients are taken from the WB's Environmental

Assessment Sourcebook (Environmental Assessment Sourcebook, World Bank, Washington D.C,

August 1991).

(2) Impact matrix method

31. The correlation between the impacts of the project activities on each issue and each environmental component are build and shown in the impact matrix. Based on that, impact studies will be focused on

details.

(3) Comparative method

32. The comparative method is used to evaluate the environmental quality, effluent discharge quality, pollutant load, etc. on the basis of comparison with relevant environmental regulations and standards,

regulations specified by MONRE and MOH, as well as related research and experiment topics.

(4) Description of environmental system

33. Project components that affect the environment are identified. And waste streams and related environmental issues are also fully identified for detailed assessment.

(5) Listing method

34. This method has been used extensively (since the National Environmental Protection Agency - NEPA has been established in some countries) and yielded positive results because of its many

advantages, such as clear approach, acute system during system analysis and evaluation. There are two

main types of listing: one type is a listing table describing environmental components to be studied

and information on measurement, prediction and evaluation, and another type is a simple listing table

consisting of environmental components to be studied that are potentially impacted.



(6) System analysis method

35. This method is applied quite extensively in environment sector. The advantage of this approach is the comprehensive assessment of impacts, which is very useful in identifying impacts and sources of

wastes. This method is applied on the basis of considering sources of wastes, sources of impacts,

affected objects, environmental components, etc. as elements in a system that are closely related to

each other. From there, the impacts will be identified, analyzed and evaluated.

(7) Community consultation method

36. This method is used during interviews with local leaders and people to collect necessary information for the Project's ESIA work and present benefits and possible negative impacts of the

Project to the environment and people's life. Based on that, feedback on the project and local people's

wishes will be aggregated.

37. In addition, local officials and local people will be exchanged and interviewed about socio-economic development situation, cultivation customs and environmental sanitation.

(8) Methods of reference, collecting and analyzing information and data

38. This method aims at identifying and assessing natural and socio-economic conditions in the project area through the data and information collected from different sources such as statistical

yearbooks, reports on socio-economic situation of the area, current status of the environment and

relevant research works.

(9) Field survey method

39. Field survey is required when carrying out the assessment of social and environmental impacts to determine the current status of the project area, related objects, and surveys to select locations for

collecting samples, survey of water supply, drainage, electricity supply, etc.

40. The consulting firm has carried out topographical and geological surveys and collected hydro-meteorological data for design in accordance with the current standards of Vietnam. These survey

results are used to assess the natural condition of the sub-project area.

(10) Expert panel method

41. This method is carried out based on the knowledge and experience of environmental science of environmental impact assessment experts from the consulting firm and other scientific research

agencies.

(11) Sampling and analysis method in the laboratory

42. Sampling and analyzing environmental components (soil, water, air) are indispensable in identifying and assessing the quality of the background environment in the sub-project area.

43. After the field survey, the sampling and analysis program will be developed with the following main contents: sampling locations, measurement and analysis parameters, necessary equipment and

tools, implementation time, sample preservation plan, analysis plan, etc.

44. For Phu Yen sub-project, the consultant coordinated with the Environmental Monitoring Agency to monitor, collect and analyze samples of air, water and soil in the area of seven reservoirs to evaluate

the quality of environment components. Collecting, analyzing and preserving samples are carried out

in accordance with current Vietnamese standards.

1.2. Implementation arrangement of ESIA report

a. Management of the subproject

- Management unit of dam rehabilitation and safety improvement Phu Yen province;

- Represent: Mr.Cao Dinh Huy – Position: Director

- Address: No. 112 Le Trung Kien, Ward 1, Tuy Hoa City, Phu Yen Province

- Phone: 0257.3843921 - Fax: 0257.3818255

b. Consultancy unit establishing report ESIA

- Thang Long infrastructure technology construction consultant joint stock company.



- Represent: Mr. Tran Trung Kien - Position: Director.

- Address: No 72/1/4, nest 4, Giap Nhat, Nhan Chinh ward, Thanh Xuan, Ha Noi.

- Phone: 024.3575 6806 - Fax: 024.3575.6806

c. Coordinating unit to implement environmental monitoring:

- Thai Duong environmental treatment and monitoring joint stock company

- Address: No. 24, Lane 18, Phan Van Tri Street, Quoc Tu Giam Ward, Dong Da District, Hanoi City

- Phone: 024 3573 7766 Fax: 024 3577 3403

- Certificate of Eligibility for Environmental Monitoring Service No.: VIMCERTS 163 issued in accordance with Decision No. 194 / QD-BTNMT dated 13/5/2016 of the Minister of

Natural Resources and Environment on the certificate of eligibility event of environmental

monitoring service..

d. List of participants in the preparation of ESIA reports

- Participants in the preparation of ESIA reports include: managers, specialized staff of the subproject owner and consulting unit included:

Table 3: List of persons participating in implementation

No. Full name Degree Position

1 Vu Kieu Thu Master Team leader / Environmental specialist

2 Le Thi Nhan Master Environmental Specialist No.01

3 Nguyen Hoài Nam Doctor Environmental Specialist No.02

4 Duong Thi Phuong Thuy Master Ecology specialist

5 Nguyen Ngoc Hop Bachelor Support staff

6 Duong Thi Van Huong Bachelor Support staff

7 Truong Xuan Truong Master Vice-team - Social expert

8 Quach Thi Xuan Doctor Expert on community development and policy

institutions

9 Phi Thi Hanh Bachelor Support staff



CHAPTER II: DESCRIPTION OF SUBPROJECT

45. Subproject: dam rehabilitation and safety improvement (wb8) Phu Yen province under the project of dam rehabilitation and safety improvement, WB8 is financed by the World Bank through the Credit

Agreement No. 5749-VN dated on 08th April, 2016 with the subproject implementation duration from

2017 to 2022. Based on Decision No. 4638 / BNN-HTQT dated 09th November 2015 by Ministry of

Agriculture and Rural Development, the Dam rehabilitation and Safety improvement subproject in

Phu Yen province is implemented in 07 communes under 6 districts: Tuy An, Dong Xuan, Đong Hoa,

Song Hinh, Tay Hoa, Son Hoa.

2.1. Objective of the subproject

a. Objective of the project:

46. Support to implementation of program to ensure safety of water reservoirs through rehabilitation and upgrading of prioritized dams, strengthening management capacity and safe operation of dam to

protect population and economic - social infrastructure in downstream area.

b. Specific objectives:

- Ensuring safety for reservoirs of Dong Tron, Phu Xuan, Dong Khon, Ea Din1, Gieng Tien, Hoc Ram, Hon Dinh and Hoa Thuan;

- Ensuring safety and serving production and life for people in the downstream area, including communes of An Nghiep, Xuan Phuoc, Hoa Xuan Tay, Ea Bar, Son Ha, Hoa Tan Tay, Son

Dinh and residents of the surrounding areas are affected;

- Ensuring proper implementation of the Ordinance on protection of irrigation works;

- Solidifying the dam surface, the road surface to the dam, installing monitoring and supervision equipment to facilitate the exploitation, management and promotion of the efficiency of the

reservoir;

- Improving environmental landscape, creating infrastructure for economic development in the subproject area.

2.2. Location of subproject implementation

47. Subproject: dam rehabilitation and safety improvement (WB8) Phu Yen province consist of 08 works at the following locations:

Table 4: Geographic location of reservoir under the subproject

No. Name of

reservoirs

Geographical location

Commune District Coordinates

1 Dong Tron An Nghiep Tuy An Main dam route with coordinates:

13°16'24.84" N and 109° 9'48.32" E.

2 Phu Xuan Xuan

Phuoc Dong Xuan

Main dam route with coordinates:

13°17'18.63" N and 109° 2'16.13" E.

3 Dong Khon Hoa Xuan

Tay Dong Hoa


12°55'29.52" N and 109°19'46.14" E.

4 EaDin 1 Ea Bar Song Hinh Main dam route with coordinates:

12°56'24.76" N and 108°50'13.93" E.

5 Gieng Tien Sơn Ha Sơn Hoa Main dam route with coordinates: 13°

2'58.11" N and 109° 1'16.05" E.

6 Hoc Ram Hoa Tan

Tay Tay Hoa


12°56'18.26" N and 109°16'53.98" E.

7 Hon Dinh Hoa Xuan

Tay Dong Hoa


12°55'15.42" N and 109°20'30.10” E.

8 Hoa Thuan Son Dinh Son Hoa Main dam route with coordinates:

13°12'15.04" N and 109° 2'53.20" E.



Figure 1: Locations of subproject reservoirs

2.3. Status of works and construction solutions

48. Some of the main specifications of the construction under the subproject are summarized in the following table.

Table 5: Summary of some specifications of reservoirs

No. Name of

reservoirs Commune

Basin

area

(km2)

Capacity

(106 m3)

Length of

soil dam

(m)

Height of

dam (m)

1 Dong Tron An Nghiep 69.5 19.55 270 29

2 Phu Xuan Xuan Phuoc 126 11.2 516 23.8

3 Dong Khon Hoa Xuan Tay 7.51 2.72 303.86 16.2

4 EaDin 1 Ea Bar 4.5 1.05 147 13

5 Hoc Ram Hoa Tan Tay 6.81 2.91 256 17.8

6 Hon Dinh Hoa Xuan Tay 6 0.71 375 4.7

7 Gieng Tien Son Ha 3 0.55 317 7.6

8 Hoa Thuan Son Dinh 2.06 0.47 200 9

49. Information on the current status of reservoirs and construction items of the subproject is presented in the following table:



Table 6: Summary of current information of reservoirs and construction works of the Subproject

Location Current status Construction works Pictures 1. Dong

Khon

reservoir

1. Main dam - The dam surface is soil, has not been

reinforced, so it often erodes;

- There are 12 termite nest on the dam body (01 upstream and 11

downstream);

- The downstream slope has appeared seeping through the soil dam causing

muddy, erosion slope, unsafe for

works;

- The dry masonry layer is used for to reinforce the upstream slope, has

been peeled, concave convex and

landslide;

- The grass protecting downstream slope has been damaged and

drainage ditch on the slope is not

existing;

- Downstream drainage pipes have been damaged, eroded, filled with

sand and sediments;

- There is no monitoring device at the dam body.

2. Spillway: - Through actual survey, the spillway

still works normally. Therefore, it is

not necessary to repair

3. Intake: - Bearing intake appeared vertical

seepage phenomenon from

upstream to downstream;

- The operation mechanics of upstream flat valves has been badly

damaged, Operation is difficult and

not watertight, there is no van house.

1. Main dam - Seepage treatment for dams and background

by inclined wall, tray foot.

- Upstream slope: Reinforced with on-site M200 pour concrete slabs, dimension of (2x2)m,

12cm thickness with drainage holes,

underneath the cement bag lining prevents loss

of cement mortar water, followed by a layer

macadam of 10cm thickness, bottom lined

geotextile layer.

- Downstream slope: anti-erosion by growing grass, grass plots (5x5m) with drainage

ditches, Slope coefficient m = 2.75.

Embankment at the slope of the dam foot

creating banquette at elevation 15.0m, wide

B=15.0m. Downstream drainage by the

downstream slope sand filter, Drainage in

downstream area by sand filter combining with

dry masonry, elevation of drainage in

downstream +14,00m + 14.00m, embankment

downstream slope by stone do not use mortar

at the downstream of the dam at + 10.30m

elevation.

- Dam crest: Concrete M200, 2x4cm stone with thickness of 20cm, Curb side downstream with

concrete M200, upstream is a wave breakwater

made of concrete M200, high 0.75m, thickness

of 0.5m.

2. Spillway - On the basis status of spillway and calculation

of hydrology and structure of spillway, it

ensures the stability. Therefore, the proposal

keeps status of the old spillway.

3. Intake - Prolonged the intake pipe with reinforced

Status of Main dam, Dong Khon reservoir

Overflow threshold, spillway and energy consumption

tank Dong Khon reservoir



Location Current status Construction works Pictures 4. Management road: - Management road to works length L

= 2.300m by soil, often muddy,

eroded, very difficult to travel in the

rainy season, making it difficult to

manage and operate the project

5. House under management - There are currently no house under

management

concrete M300 toward downstream, Combined

energy dissipitation’s tank beyond the intake.

Build houses to cover the intake tower valves

and build railing of the bridge connected to

house to cover the intake tower valves .

4. Management road: - Construction management road and operation

of the works, serial from the end of the

existing concrete road to the dam foot of the

Dong Khon reservoir.

- Total length of road L = 2,241.60m. - Width of road surface B = 4m including

concrete 3m wide and 02 road curb is made of

soil each side 0.5m. The structure of M250

cement concrete road is 18cm thickness,

plastic tarpaulin lining below. The concrete

road surface is divided into 5m long sections,

with elastic slot.

5. House under management: - Combining the construction of intake operating

space to do House under management

Status of intake, Dong Khon reservoir

Status of Management road, Dong Khon reservoir

2. Dong Tron

reservoir

1. Main dam - The dam surface is made of

concrete, not damaged;

- Soil dam at the left shoulder position of the spillway was infiltrated,

causing water to accumulate in the

downstream slope. The length of the

permeable section is ab

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