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NAM NGIEP 1 HYDROPOWER PROJECT DWP and SS-ESMMP for Construction of River Diversion Structure Works at Inlet and Outlet

NNP1-MS-MD-006-A1

OBAYASHI CORPORATION Page 1 Revision: A1 November 2014

CONTENT

Page

REVISION STATUS 3

PART 1 : DETAILED WORKS PROGRAME

1 GENERAL 5

1.1 Outlet Portal of Tunnel Structure Works 5

1.2 Inlet Portal of Tunnel Structure Works 8

2 REFERENCE 11

3 MATERIALS 12

4 EQUIPMENT AND MANPOWER 12

4.1 Equipment and Tool 12

4.2 Nominated Subcontractor and Manpower Distribution 13

4.3 Temporary Facilities 14

5 CONSTRUCTION PROCEDURE 15

5.1 Survey Work 16

5.2 Structure Works for Inlet and Outlet of Diversion Tunnel 16

5.2.1 Leveling Surface and Compaction 16

5.2.2 Leveling Concrete 16

5.2.3 Rebar and Formwork Fabrication 16

5.2.4 Installation Rebar and Formwork for Bottom Slab 17

5.2.5 Casting concrete for Bottom Slab 18

5.2.6 Installation Rebar and Formwork for Wall 18

5.2.7 Casting concrete for Wall 20

5.2.8 Installation Rebar and Formwork for Top Slab 20

5.2.9 Casting Concrete for Top Slab 20

5.2.10 Drainage 20

6 SAFETY CONTROL 21

7 QUALITY ASSURANCE 22


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PART 2 : SITE SPECIFIC ENVIRONMENT & SOCIAL MANAGEMENT & MONITORING PLAN ( SS – ESMMP)

8 ENVIRONMENTAL& SOCIAL MANAGEMENT& MONITORING PLAN 24

8.1 Introduction 24

8.2 Environmental and Social Pre-Construction Description 24

8.2.1 Land Use 24

8.2.2 Significant Biological Features 25

8.2.3 Proximity to Villages, Cultural Sites 25

8.3 Sub-Plan Detail for Inlet& Outlet Structure – Environment 29

8.4 Sub-Plan Detail for Inlet& Outlet Structure – Social 31

8.5 Chance Find Procedures 33

9 APPENDIX 34

9.1 Organization of Diversion Tunnel Inlet & Outlet

9.2 Construction Schedule of Diversion Tunnel Inlet & Outlet

9.3 Emergency Action Plan

9.4 Working Drawings for Inlet & Outlet Structure Works

9.5 Resources for Inlet & Outlet for Structure Works

9.6 Temporary Facility Layout for River Diversion Tunnel Inlet & Outlet

9.7 Construction Sequence of Inlet & Outlet Structure Works

9.8 Inspection and Test Plans (ITP)

9.9 Sub-plans for ESMMP-CP

9.10 Environmental Management Activity Table


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REVISION STATUS

Rev. No. Description Issue Date Remarks

A1

1st Submission for Owner Review

12/November/2014


NNP1-MS-MD-006-A1


PART 1

DETAILED WORKS PROGRAME

(DWP)


NNP1-MS-MD-006-A1


1. GENERAL

This detailed works program focuses on the construction procedure for Structure Works at Inlet

and Outlet portal of River Diversion Tunnel (preparation work, survey work, leveling surface,

compaction and leveling concrete before installation of rebar, bottom slab, wall and top slab).

This tunnel will be constructed in order to keep the work area of the main dam dry enough

during the construction. At the initial stage, inlet and outlet structure works will be carried out in

accordance with prudent utility practice unless otherwise specified. The inlet and outlet of this

tunnel are located at left side of the Main Dam as shown in Fig.1.

Design details of inlet and outlet are in accordance with the Owner’s design.

Fig.1 Location of Inlet and Outlet of River Diversion Tunnel

1.1 Outlet Portal of Tunnel Structure works

Outlet Structure works will be carried out by open structure from bottom to top (EL.175.5 – EL.185.5) with step bench high max 10 m.

Length: 12m, Width of Bottom: 10m (outside portal) and 9m (Inside portal), High: 6.5m

(river side ) and 10m (mountain side)

The plan view and typical structure works of outlet portal is shown in Fig.2-5

Diversion

Tunnel - Outlet

Diversion

Tunnel - Inlet


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Fig.2 Plan view of Diversion Tunnel Outlet

Fig.3 Typical Bar Arrangement Drawing of Diversion Tunnel Outlet


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Fig.4 Typical cross section at Diversion Tunnel Outlet Structure

Fig.5 Typical longitudinal section at Diversion Tunnel Outlet Structure


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1.2 Inlet Portal of Tunnel for Structure works

Inlet Structure works will be carried out by open structure from bottom to top slab (EL.179.0 ~ EL.200.5) with step bench high max 10 m.

Length: 31m, Width: 22.6m (outside portal) and 14m (inside portal), High: 16.5m Inlet Axis is at the center of Inlet portal, Length:15m, Width: 2m and High:16.5m

The plan view and typical cross section of Inlet portal is shown in Fig.6-9

Fig.6 Detail plan view of Diversion Tunnel Inlet


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Fig.7 Plan view of Diversion Tunnel Inlet

Fig.8 Typical longitudinal section of Diversion Tunnel Inlet


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Fig.9 Typical cross section at Diversion Tunnel Inlet


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The major quantities for Inlet and Outlet structure works at River Diversion Tunnel are shown in Table 1. These quantities should be conferred with the Owner separately because of change of the existing ground and geology condition.

Table 1. Major Quantities for Inlet and Outlet Structure works at River Diversion Tunnel

No. Description Quantity Unit Remark

Outlet

1 Lean Concrete 0.1m thick 14 MPa 12 m3

2 Concrete Bottom Slab 0.5m thick 21 MPa 62 m3

3 Concrete Wall 0.5m thick 21 MPa 104 m3

4 Rebar SD40 5 Tons (ф12)

Inlet

1 Lean Concrete 0.1 m thick 14 MPa 66 m3

2 Concrete Bottom Slab 1.5m & 2.0m thick 24 MPa 1,023 m3

3 Concrete Wall 1.5m & 2.0m thick 24 MPa 1,607 m3

4 Concrete Top Slab 1.5m thick 24 MPa 834 m3

5 Rebar SD40 354 Tons (ф16,20,25)

Note) the above quantities are estimation based on the design drawing and might be

changed subject to actual geological condition.

In environmental view, the key features of Structure works at Inlet and Outlet of River Diversion

Tunnel are summarized as below.

The construction area of Inlet and Outlet are located at the left bank side and there are

no village around there. Therefore the influence on neighborhood inhabitants by this

construction is very small.

The land along Inlet and Outlet is almost government land before commencement of this

construction.

There is no creek and small river with water flow in the dry season at Inlet and Outlet area.

2. REFERENCE

Referenced Specifications:

- River Diversion : GR 2.3.1, TS 1.2

- Earthwork : TS 2.2, 2.3, 8.2

- Drainage : TS 9.3

- Revetment : TS 3.3, 3.4, 3.5, 3.9

- Concrete : TS 6


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3. MATERIAL Table 2. Material to be used

No. Description Class / Type Use for

1 Concrete for Inlet & Outlet 21 MPa &24 MPa Concrete Structure of Inlet and Outlet Portal 2 Rebar SD40

4. EQUIPMENT AND MANPOWER

4.1 Equipment and Tool

Table 3. Major Equipment List

No. Equipment / Tool Capacity Nos Purpose

1 Excavator 0.7 m3 1 Excavation, Loading

2 Bulldozer 21 ton 1 Spreading Material

3 Compactor Roller 10 ton 1 Compaction Soil

4 Motor Grader 12 ton 1 Spreading Material

5 Mobile Concrete Pump Truck 30 m3/h 2 Concrete Placing

6 Concrete Mixer Truck 5 m3 5 Transportation Concrete

7 Mobile Crane Truck 25 ton,35 ton 2 Erection Formwork, Rebar

8 Unit Truck with Crane 5 ton 1 Material Transportation etc.

9 Service Truck 2-4 tons 2 Material Transportation etc.

10 Air Compressor 375 cfm 1 Cleaning Surface

11 Generator 600 kVA 1 Supply Electric Power

12 Concrete Vibrator 4 To Compact Concrete

13 Submersible Pump 2” - 6” 4 Cleaning, Dewatering

14 Welding Machine 4 Assembly Formworks

15 Cutter machine 2 Cutting Rebar

16 Bar Bender machine 1 Bending Rebar

17 Scaffolding 500 kg 1,200 Supporting Formwork

Resource schedule for Inlet and Outlet is shown in Appendix 9.5


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4.2 Nominated Subcontractor and Manpower distribution

Nominated Subcontractor: RIGHT TUNNELLING CO., LTD. In general, the subcontractor will be nominated, concerning not only price/rate but also following items, fully described below.

1) Technical competence

2) Financially stable

3) Administrative competence

4) Past project experience and reference

5) Ability to meet schedule

6) Quality and skill of work

7) Capacity(equipment, staff, worker) and organization

8) Ability to meet safety and environment requirements.

And then, the evaluation for subcontractor will be done and recorded.

Manpower distribution for this work is planned as below.

Table 4. Manpower Distribution for Inlet and Outlet excavation works

No. Manpower Planned

Number Duty

1 Engineer 1 Site management

2 Engineer 2 Site engineering

3 Foreman 6 Work management

4 Equipment operator 5 Excavator, Roller, Bulldozer

5 Driver 11 Pump car, Crane Truck, Unit Truck…

6 Skill Workers 12 Rebar works, Form works, Concreting

7 Common worker 48 Assistant to skilled worker

8 Security guard 4 Security Site Materials

9 Mechanic 1 Maintenance of equipment

10 Electrician 1 Electrical equipment maintenance

11 Chief Surveyor 1 Survey chief

12 Assistant Surveyor 4 Survey assistant

Total 96


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4.3 Temporary Facilities

Table 5.Major Temporary Facilities

No. Facilities Location

1 Contractor’s Camp STA.4+900 (P1)

2 Worker’s Camp No.2

(Sub Contractor’s Office) STA.6+120 (P1)

3 Temporary Facility of River Diversion Inlet

4 Disposal Area (No.2) Left Bank

The layout plan of Temporary Facility for River Diversion Structure is shown in Appendix 9.6

Fig.10 Major Temporary Facilities Map

Disposal Area No.2

Worker’s Camp No.2

Contractor’s Camp

Inlet

Outlet


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5. CONSTRUCTION PROCEDURES

Typical construction procedure for Inlet and Outlet Structure works at River Diversion Tunnel is

shown in Fig. 11. The detail of construction sequence is shown in Appendix 9.7

Fig.11 Construction Procedure for Inlet and Outlet Structure works


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5.1 Survey Work

Firstly temporary benchmarks for elevation and coordinate are established around

work area. Refer to section no. 5.1 in the Detailed Work Program for Inlet and Outlet

River Diversion Excavation Works, NNP1-MS-MD-001.

After inspection by the Owner on the leveling and compaction works will be started.

The position of installation rebar so be marked by survey.

Survey instruments shall be calibrated in accordance with the section 5.3.3 testing

equipment and facilities of the latest Quality Assurance Program (Document No.

NNP1-PRG-DrQAP-A3) enclosed with Contractor letter NNP1-PCL-00086, dated 16th

January 2014.

5.2 Structure Works for Inlet and Outlet of Diversion Tunnel

5.2.1 Surface Clearing

Before structure works, the surface should be cleaned and leveled. Clearing shall

consist of the removal and disposal of everything above surface level, that include

broken stone, trees, stumps, logs, bush, undergrowth, grass, crops and loose

vegetable matter.

5.2.2 Leveling Concrete

After cleaning, the leveling concrete that is class 14Mpa shall be provided to level the

surface.

Excavator using for pouring concrete shall be set up on the working platform. Concrete

shall be transported to site by mixer truck then discharge to the Hoe of Excavator.

Concrete shall be put on blinding stone and/or wreckage of rock by excavator and

levelling by manpower. After placing concrete, surface shall be finished by using a

trowel. In some cases, the Excavator can’t set up on the working platform, the concrete

pump shall be used to pour concrete.

5.2.3 Rebar and Formwork Fabrication

Fabrication Yard:

Rebar workshops and rebar storage yard will be established at temporary batching

plant area at disposal area no.2 (Appendix 9.6)

All reinforcement shall be stock piled by its own kind and keep elevated from the

ground with proper covering to insure that the rebar shall be free from any means of

getting wet to avoid rust.

Rebar Fabrication:

Rebar shall be fabricated as approved working drawing at rebar workshops with the

use of bending and cutting machines. After completion of fabrication for each piece, it

shall be carefully kept in the dry and stable condition at stockyard, which is more 20cm

higher than ground surface and no water flooded areas and covered by plastic sheet

to protect rain weather.


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The rebar should be deformed bar with diameter of 12, 16, 20 and 25mm as shown in

working drawing. The JIS G3112-1987 standard is its Specification of SD40 grade as

Yield Point from 390Mpa to 510Mpa and Tensile Strength in 560Mpa Min.

Formwork Fabrication:

Formwork shall be fabricated at fabrication yard and conformed to designed drawing.

At some irregular position such as corner, rubber form shall be used to fill-in the gap

between two panel forms. All forms shall be cleaned free from dust, grease or other

matter and shall be applied form-oil before installation. And before casting concrete,

surface of formwork shall be cleaned again by water to prevent dust from surface of

concrete after casting. In order to run off water outside formwork, bottom formwork will

be arranged a cleaning window.

5.2.4 Installation of Rebar and Formwork for Bottom Slab

Inlet

Inlet bottom slab shall be divided into 3 blocks. Sequencing of areas where

construction would be started from the lower to higher portion (Appendix 9.7).

Layout of rebar skeleton shall be marked clearly at the surface of the lean concrete.

Rebar should be set up to reach exact position considering the appropriate concrete

covering.

Mortar block spacers will be used for spacer of bottom and side in order to keep the

appropriate concrete covering. The support bar will be installed on mortar block spacer.

The purpose of this support bar is for fixing bottom reinforcement in tidy and ensuring

the thickness of concrete covering will be as per specification. Rebar DB12 or DB16

would be used as the support bar

Fig.12 Concrete Covering and Fixing Bottom Reinforcement Arrangement

After installation of the bottom rebar, top rebar; side rebar and starter rebar/main rebar

of wall will then be placed on its exact location. Position of starter rebar/main rebar

shall be paid enough attention. Hoop rebar shall be tied with diagonal temporary bars

opposite to each other to make a case which will against a temporary support system

to keep it in stable position.

Steel forms may be used to construct the bottom slab. Forms will be cleaned and form

release agent shall be applied prior to installation. Excessive application of release

agent which may contaminate the concrete shall not be allowed. Materials which

adhere to or discolor the concrete surface shall not be used. Formworks shall be

installed using the line markings on the lean concrete. Forms shall be set at exact

position and held true to the dimension of the structure prior to and during placement

of concrete. It shall have adequate supports, stable and constructed in accordance


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with the construction drawings. Access openings may be provided for cleaning out

extraneous materials immediately before concrete placement.

Dimensions, alignment and elevation of top concrete shall be checked and must be

within the allowable tolerance described in inspection and test plan at quality control

item.

Metal ties or anchorages within the form shall be so constructed as to install and

remove the formwork without causing damage. Forms shall not be removed until the

concrete has attained sufficient strength to prevent damage to the concrete surface

preferably after 24 hours. Prior to re-use, forms shall be inspected for damaged and if

so must be repaired.

Outlet

Outlet bottom slab shall be constructed as a unity. Rebar and formwork will be installed

as per description in Inlet.

5.2.5 Casting Concrete for Bottom Slab

Before concreting, it should be carried out installation of the embedded material, the

temporary item for casting concrete such as the spacer, the concrete pump pipe

system if use pump truck. The formwork surface should be cleaned before concreting

by high pressure water.

After inspection of the Owner, the concreting can be commenced. Concrete will be

supplied by CVC plant.

Concrete shall be poured by the concrete pump (boom length type) or truck mixer.

Each concrete layer after pouring, vibrator will be used to consolidate the concrete.

When vibrating later concrete layer, the vibrator head shall penetrate at least 15 cm.

depth into previous layer.

Concrete surface level will be made by leveling instrument and finished by wooden

trowel.

Concrete for bottom slab at Inlet is class C24 and Outlet is class C21.

The concreting should be in the early of morning. In the raining case, placed concrete

will be cover by canvas, water shall flow from higher to lower position and not join into

concrete.

The concreting must be recorded the necessary information (temperature, slump,

quantity…) and report to the Owner.

5.2.6 Installation of Scaffolding, Rebar and Formwork for Wall

This item shall be constructed same to method that is described in 5.2.4 – Installation

of rebar and formwork for bottom slab.

The detailed drawing and structural calculation of wall formwork will be proposed to

Owner separately prior to commencement of work.


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Fig.13 Prefabbed Panel Form System for Wall Formwork

Photo 5.2.6. Prefabbed Panel Form System for Wall Formwork


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5.2.7 Casting Concrete for Wall

This item shall be constructed same to method that is described in 5.2.5 – Casting

concrete for bottom slab.

5.2.8 Installation of Rebar, Scaffolding and Formwork for Top Slab at Inlet

The rebar and formwork shall be constructed same to method that is described in 5.2.4

– Installation of rebar and formwork for bottom slab.

The scaffolding shall be provided to cast top slab at Inlet. It shall be removed after

strength reach of 90 percent, during 2~3 days in estimation.

The detailed drawing and structural calculation of scaffolding and soffit form will be

proposed to Owner separately prior to commencement of work.

Photo 5.2.8 Scaffolding for top slab

5.2.9 Casting Concrete for Top Slab at Inlet

The Top Slab should be casted after wall concrete is stability. Obviously, the inspection

between Main Contractor and Owner should be carried out prior to commencement of

casting.

This item shall be constructed same to method that is described in 5.2.5 – Casting

concrete for bottom slab.

Quality control of rebar, concrete should be secured and be described in Appendix 9.8

– Inspection and Test Plan.


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5.2.10 Drainage

Structure works at Inlet and Outlet portal of River Diversion Tunnel will be carried out

in dry season according to the construction schedule (Appendix 9.2), and additionally

considering the following conditions, sedimentation pond and open ditch will not be

installed for these works.

- At Inlet portal, the level of subgrade at riverside is higher than the river water

level that will allow dry condition works.

- At Outlet portal, temporary flood protection dike will be constructed that will

allow dry condition works.

- At Inlet and Outlet portal, there is no inflow of mountain runoff.

In case of turbid water flowing, temporary sedimentation pond with submersible pump

shall be installed to protect and prevent turbid water from flowing out of the

construction area.

The location of temporary sedimentation pond will be changed according to the

structure situation. Prepared submersible pumps will be 2” ～ 6” size. These pumps

will be used according to the turbid water flowing.

6. SAFETY CONTROL

Safety control for site works shall be followed to the latest Safety and Security Program

(Document No. NNP1-PRG-SSP-A3) enclosed with Contractor’s letter NNP1-PCL-00044,

dated 10th December 2013.

Daily working cycle on this site is shown in below.

Fig. 21 Daily Working Cycle

Pre-working MeetingWorking and Safety Schedule for Today

Pre-working CheckSite and Facilities Condition

Working

Clearing after WorkingSite and Facilities

Daily MeetingWorking and Safety Schedule for Tomorrow

AM

PMWorking


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Especially for Inlet and Outlet Structure works area, the following issues shall be concerned.

1) Striking heavy equipment and crane accident

For all staffs and worker, the safety training shall be carried out.

Warning sign boards will be arranged.

Don’t approach the working radius of heavy equipment.

In case that the worker needs to approach the equipment, he shall request the

operator to stop operation and confirm the stopping.

Watch man shall be arranged.

Never enter under lifting work.

2) Falling from high place

Use safety belt on high place (H >2m).

Daily check for Scaffold shall be done.

Before commencement work, safety training will be carried out to relevant staffs and workers.

And the emergency action plan is attached in Appendix 9.3

7. QUALITY ASSURANCE

Quality Assurance shall be followed to the Quality Assurance Program (Document No. NNP1-

PRG-DrQAP-A3) in the NNP1-PCL-00086, dated 16th January 2014.

Material testing during construction will be performed by on-site laboratory as specified in

specifications. And the proposed Inspection and Test Plans (ITP) are as shown in the Appendix

9.8

The dimensions of As-built will be measured and As-built drawings will be developed for

submission to the Owner.

The inspection and test on site shall be informed of the Owner before the implementation.


NNP1-MS-MD-006-A1


PART 2

SITE SPECIFIC ENVIROMENTAL AND SOCIAL

MANAGEMENT AND MONITORING PLAN

(SS-ESMMP)


NNP1-MS-MD-006-A1


8. ENVIRONMENTAL& SOCIAL MANAGEMENT& MONITORING

8.1 Introduction

This Site Specific Plan has been prepared to highlight environmental and social conditions

prior to the beginning of each construction activity and will be used as a tool to ensure the

particular activity follows the correct management and mitigation procedures. Sub-Plans will

be used to detail mitigation methods for each of the activities associated with the construction

or excavation works.

This plan details foundation and structural works for inlet and outlet portals of the river

diversion tunnel. The diversion tunnel will be used to divert water away from the main dam

area and allow dry conditions for construction works. The inlet and outlet are located on the

left side of the main dam. Main structure works will consist of using rock bolts, steel re-

enforcements and shotcrete, with the same technique used for upper slope stabilization.

Table 8.1 below shows the referential linkages of documents regarding environmental

matters in the NNP1 Project. The Owners (NNP1) documents use references and

information from the Concession Agreement. This SS ESMMP (Contractor) uses references

and information from Owners EIA/ESMMP and Owners ESMMP-CP.

Table 8.1 List of Main Documents and Approving Authority

Item Hierarchy of Documents Approving Authority

1 Concession Agreement GOL

2 NNP1 EIA/EMMP GOL

3 ESMMP-CP GOL

4 Contractors EMP NNP1

5 SS ESMMP NNP1

The Contractor documents are; Contractors EMP (Item 4) and SS ESMMP (Item5) which

have used applicable information extracted from the Owners documents which are

Concession Agreement (Item 1), NNP1 EIA/EMMP (Item 2) and ESMMP-CP (Item 3).

All obligations of the contractor are stated in the Civil Works Contract (CWC) which includes

Schedule 9 (Concession Agreement Pass Through Obligations) and is the only governing

document for the Contractor.

8.2 Environmental and Social Pre-Construction Description

8.2.1 Land Use

No permanent land use directly occurs in the construction area, with the terrain too

steep and rocky for any kind of agricultural development.

The construction area is along the left bank of Nam Ngiep River, which is within a deep

valley. The width of the river spans approximately 70m during the rainy season and

30m during the dry season. Water flow can be very fast during the wet season,

appropriate safety measures need to be taken when working within this area, and

these will be detailed further in the Sub-Plans.


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8.2.2 Significant Biological Features

A targeted primate survey was undertaken in November 2013 and mentions two

species (by vocalization) of gibbons present in the project area, however their habitats

are located uphill areas outside of the inundation and Inlet/Outlet zone.

8.2.3 Proximity to Villages, Cultural Sites

The closest Village is Ban Hatsaykham, over 4km to the east of inlet/outlet construction

sites. There will be no direct impact to villages from construction activities apart from

potential traffic and dust hazards from machinery and trucks passing through

residential areas. There will be no impacts expected to temples or cemeteries.

Table 8.2 below is a pre-construction checklist to identify any major environmental

impacts that may occur during construction works. After completion of the checklist the

sub-plans can be selected accordingly.

Table 8.2 Environmental Assessment Checklist – For Pre Construction

Site Location Inlet (T4 STA.0+200) and Outlet (P2 STA.1+540)

GPS Coordination Inlet: E 344138.89, N 2062403.42 Outlet: E 344741.98, N 2062261.40

Photo See attached

Date 4th October 2014

Estimated Area 9,286m2

Prepared By Santi Sayakoummane

Checked By Keiji Sasaki

Site Description Inlet and Outlet structural works including slope stabilization and construction of temporary facilities.

Project Setting Yes No Description

Will the site require UXO clearance? X UXO clearance for the inlet and outlet construction sites has been conducted by NNP1

Is there surface water located in close proximity to the site?

X The site sits directly on the left bank for the Nam Ngiep

Is there a village or community located in close proximity to the site?

X Closest village is Ban Hatsaykham, approx. 4km east of site

Is the site located in a vegetated area?

X Vegetation has been previously cleared during earthworks stage

Is the site located in agricultural land? X Site is directly on the Nam Ngiep

Are there any Physical Cultural Resources (PCR) sites in the area?

X No confirmed PCR on site

Is there an existing access road to the site?

X The inlet portal is located at access road T4 STA.0+200 the outlet is location along P2 STA.1+540

Can the site be viewed from public viewpoints?

X From Nam Ngiep


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Is the site located within an existing Construction Area?

X Alongside newly constructed access roads, T4 and T13

Will the site development require the construction of a sub-camp, office and storage? (if yes, provide a list)

X Worker Camp No.2 will be used for the Sub-Contractors worker camp. Location shown in Section 4.3, Figure.10 Part 1 of the DWP

Other Comments: Slope stabilization will take place to ensure

Environmental Impacts Likelihood (Yes/No)

Mitigation measure to be Implemented

Will the site development result in increased dust generation at near-by villages?

No No villages within vicinity of site

Will the site development result in increased noise generation at near-by villages?

No No villages within vicinity of site

Will the site development result in surface water turbidity?

Yes

The working level of the inlet will be above the water level. At the outlet a flood protection dike will be constructed to reduce sediment and water entering the construction site.

Will site development result in changes to drainage patterns?

Yes

All excavation/construction works will be conducted during the dry season and above water level. However a flood protection dyke will be constructed only at the outlet portal, as this will undergo construction regardless of season

Will the site result in erosion? Yes Shotcrete and conventional concrete will be used for bank stability and erosion control as soon as area has been cleared and excavated

Will vegetation clearing be required? No Vegetation cleared during earthworks stage. No extra clearing will be expected

Will the site be setting up hazardous component? (i.e. storage, workshop)

Yes A temporary cement batching plant will be constructed off site and transported by mixer to and from sites

Will the site generate waste? Yes

Steel re-enforcements and used cement will be gathered on site and disposed of separately

Site closure plan:

Once the inlet and outlet support structures are complete excavation of main diversion tunnel can begin.


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Photo 8.1. shows slope stabilization process above the inlet portal, with steel mesh and

shotecrete being applied. This work is required before inlet structural works can begin

Photo 8.2. Shotcrete being applied to sections above the inlet portal to increase slope

stability.


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Photo 8.3. Holes being drilled for rock bolts which are insterted after shotcrete has been

applied.

Table 8.3 identifies the relevant list of sub plans required for the structure works of the inlet and

outlet portals. The sub plans were selected after a review of the following:

Detailed Works Program (DWP)

Pre-Construction assessment (as per 8.2 Environmental Checklist)

NNP1 EIA and ESMMPs

Table 8.3 Relevant sub plans for inlet and outlet structure works.

Sub-Plan Item Environmental Social

SP01 Erosion and Sediment Control X

SP02 Water Availability and Pollution Control X -

SP03 Emission and Dust Control X

SP04 Noise and Vibration - -

SP05 Waste Management X -

SP06 Hazardous Material Management X

SP07 Vegetation Clearing - -

SP08 Landscaping and Re-vegetation - -

SP09 Protected Area management - -

SP10 Biodiversity Management - -

SP11 Spoil Disposal - -

SP12 Quarry and Construction Layout - -

SP13 Unexploded Ordinance (UXO) Survey and Disposal - X

SP14 Construction of Work Camps - -


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SP15 Traffic and Access X

SP16 Training Awareness X

SP17 Project Personal Health Program X

SP18 Public Safety X

SP19 Damage to Property and Facilities - -

SP20 Emergency Preparedness X

SP21 Cultural Resource X

Detailed descriptions are found in the relevant sections relating to Environmental or Social

Management and Monitoring Plans. See Contractors EMMP-CP Appendix 2.1 “Sub-Plan for

Civil Works”

A detailed Environmental Management Activity Schedule for inlet and outlet structure works

can be referred to in Appendix 9.10

8.3 Sub-Plan Detail for Inlet& Outlet Excavation – Environment

SP01 Erosion and Sediment Control

Structure works at inlet and outlet portals will be carried out during the dry season,

refer to the construction schedule (Appendix 9.2).

At the inlet portal the level of subgrade along the riverside will be higher than the

water level, allowing dry working conditions.

The outlet portal working area will be kept dry by existing ground before completion

of temporary flood protection dike.

The flood protection dyke will be used to keep the outlet construction area dry during

the wet season.

The excavated slope area of inlet and outlet portal will be protected by steel re-

enforcements and shotcrete with rock bolts, as soon as they are excavated and

cleaned of any loose materials as seen in Photo 8.2. and Photo 8.3. (Environmental

checklist).

Bunds from excavated material will be constructed around construction areas to

reduce rock and soil entering Nam Ngiep. Bunding also acts as a safety measure to

protect excavator operators. Bund designs can be referred to in Appendix 9.6.

SP02 Water Availability and Pollution Control

Open ditches will be constructed as part of access roads T4 and T13, these will

reduce run-off from upper slopes entering construction sites.

Due to the small working area, the cement batching plant for shotcrete production will

be temporarily constructed at Disposal Area No.1. The cement mix will then be

transported to site as needed; site layout is included in Appendix 9.6. All cement

transport trucks will be washed at the batching plant.

All structural work will be carried out during the dry season.

Discharge of any cement filled water into Nam Ngiep or any other water ways is

prohibited.

Temporary toilet facilities and common room will be constructed at both inlet and

outlet sites as shown in Appendix 9.6. All worker will be instructed to use these toilets.


NNP1-MS-MD-006-A1


SP03 Emission and Dust Control

Water spraying vehicle will be provided in active construction sites and along access

roads as needed.

Village roads will also be sprayed in the case of heavy transportation vehicles passing

through, with a minimum of twice daily during the dry season.

Correct PPE must be worn, especially when working with rock drilling machinery.

SP05 Waste Management

On site, waste from lunch and common areas must be collected and later transported

back to worker camps.

Section 4.3 in Part 1 of the DWP illustrates Temporary Facilities; Disposal Area No.2

and Workers Camp No.2, where all on site waste should be transported to.

General construction waste, such a steel reinforcements, will be stockpiled on site

and then transferred to Worker Camp No.2.

Worker camps will separate all waste into recycle and general waste.

Disposal of un-used cement or shotcrete on site or waterways is prohibited. All

waste material must be transported back to batching plant or disposal areas.

SP06 Hazardous Material Management

Most fuels for machinery will be stored at worker camp sites in specially designed

areas, with mobile fuel trucks used for refueling of machinery.

If temporary generators or fuel tanks are to be stored on site they must be; away from

waterways, placed on a raised impervious flooring, have a safety bund constructed,

and adequate roofing. Designs and location will be reviewed by OC.

All cement will be prepared at the temporary batch plant, the ready mix will be

transported into construction areas for use.

Refer to Appendix 9.6 for batching plant layout and hazardous storage facilities.

Storage area for cement will require raised or bunded flooring and suitable roofing.


NNP1-MS-MD-006-A1


8.4 Sub-Plan Detail for Inlet& Outlet Structure – Social

SP13 Unexploded Ordinance (UXO) Survey and Disposal

UXO clearance has been carried out within the inlet and outlet construction areas by

NNP1 before the beginning of any construction activities.

SP15 Traffic and access

Cement trucks used for shotcrete will utilize access road T4 and T13. These trucks

will be restricted to 25km/h.

Night shift is expected for structure works.

Regularly monitoring of traffic conditions will be conducted as part of the weekly

Environmental, Health and Safety inspection, with main focus being driving speeds

around the Project site.

SP16 Training and Awareness

All new employees will be required to complete Induction Training from OC/NNP1

prior to commencing any work on site.

In this training, the Contractor will highlight site rule/regulation and safety &

environmental issues.

A register of induction training will be maintained and can be provided to NNP1 on

request.

Monthly safety mass meetings will be conducted with all employees, and will cover

all relevant health and safety issues on site.

Daily tool box meetings will also be conducted to bring further awareness to

environmental health and safety issues.

SP17 Project Personnel Health Program

Regarding the content of Section 6 in Part 1 of the DWP in this document a tool box

meeting will also be carried out weekly and before commencement of any new works.

Health Awareness Training will be carried out for all personnel in the monthly mass

meeting.

The register for each item above can be provided to NNP1 on request.

First aid kits will be prepared on site accordingly, these include; Individually wrapped

sterile adhesive dressing, Crepe bandage (5.0 cm), Crepe bandage (7.5 cm),

Absorbent Gauze (packet of 10 pcs), Adhesive plaster roll (1.25 cm width), Triangular

bandages, Scissors, Safety Pins, Disposable gloves (pairs) One-way valve

transparent mask or 2-way mouthpiece, Sterile water or saline in 100 ml disposable

container (only where tap water is not available).

First aid kits will be located at the common rooms at both inlet and outlet sites, see

Appendix 9.6.

Section 6 Safety Control of the DWP, highlights main issues during construction of

Inlet and Outlet areas.


NNP1-MS-MD-006-A1


SP18 Public Safety

Traffic signage will be installed at sensitive locations around the construction area.

Watchmen will supervise construction activities and assist in directing passing traffic.

The area will already be closed to the public, however for safety of workers, signs and

barriers will be installed around high risk areas, such as along access roads around

the construction areas.

SP20 Emergency Preparedness

Referring to the emergency action plan in Appendix 9.3, the emergency response

procedures, emergency contact numbers and communication and reporting

procedures will be clearly displayed and each staff always carry it.

First aid kits will be prepared at each site accordingly.

Hazardous materials will be stored in the permitted area only and according to the

instruction by the authorities.

When working at heights, the correct PPE such as safety harnesses and hard hats

must be worn. The conditions of safety equipment must be checked every day.

The area under the high working area shall have limited entry.

Due to the location of the works being so close to the Nam Ngiep River, heavy rainfall

can cause rapid increase in water levels.

The safety control plan against flood and evacuation procedure is as follows:

1) Monitoring for safety control plan against flood shall be based on the following

measures described below:

- Weather forecast from the Local Bureau of meteorology

- Analysis of water discharge based on survey monitoring data

- Visual monitoring of water level gauge by watchman along Inlet/Outlet

site

2) When there is a forecast of heavy rain, watchman shall observe elevation of water

level carefully.

3) Warning shall be given when the water level rises rapidly, (Re-Regulation Dam

describes an increase of 1.5m per hour)

4) Watchman shall follow the reporting procedure of the Emergency Action Plan in

Appendix 9.3. Evacuation shall be carried out immediately and shall follow the

required time (8 hours). Evacuation procedure for safety control plan is described

as follows:

(i) After confirmation alert, the safety officer shall provide signal voice (whistle

and/or siren) as commencement for immediate evacuation of all

construction materials (includes excavated soil, rock), equipment and tools,

and workers to higher ground.

(ii) After the removal of all materials, equipment and tools, attendance of

workers shall be checked and confirmed after the evacuation.

(iii) The Safety officer will do a final check of whole area to ensure the

evacuation process is completed.


NNP1-MS-MD-006-A1


During structural works workers will be required to work at heights and also confined

spaces.

Correct PPE such as safety harnesses and scaffolding shall be used when applying

shotcrete at large heights. If an area is considered too dangerous for workers

machines will be used.

Scaffolding will be checked by safety staff before it is allowed to be used for work.

The appropriate risk assessment of each particular activity shall be carried out and if

deemed too high of risk, necessary measures will be taken to ensure the safety of

workers.

An emergency drill can be conducted as part of the emergency action plan, in the lead

up to the wet season.

The safety control on site will be changed, revised and added every time in accordance

with occurrence of a dangerous situation and/or with the Owner’s comments.

SP21 Cultural Resource

If the Contractor is to find any new physical or cultural resources during construction, the

Contractor shall stop the works and inform the Owner immediately and follow the Chance

Find Procedures outlined below.

The Environmental mitigation plan will be changed, revised and added in accordance

with the occurrence of adverse impact to the surrounding environment and social

environment and the Owner’s comments.

8.5 Chance Find Procedures

Objectives of Chance Find Procedures are to; (a) minimize impacts to resources from all

NNP1 related activities and (b) to ensure that any artifacts uncovered are appropriately

recorded, documented and reported to the appropriate line agencies.

If any fossil or cultural item of significance is found the Contractor will promptly give notice

to the owner. This follows the guidelines stated in the Civil Works Contract “CWC” Clause

4.25 regarding Fossil and Artifacts.

Chance find procedures as described in Contractors EMMP-CP Sub-plan Appendix 2.1 Sub-

Plan for Civil Works, “21:Cultural Resources” The following steps will be implemented in the

event that previously unidentified artifacts are identified:

i. The Contractor shall immediately cease operations in areas where

artifacts/archaeological finds are unearthed and immediately inform NNP1 Site

Manager.

ii. The Owner will consult the Head of Village and Culture and Tourism

Administration Office to obtain advice regarding the next steps.

iii. The Contractor to recommence work only after the Culture and Tourism Office has

provided official notification accordingly.


NNP1-MS-MD-006-A1


9. Appendix

9.1 Organization of Diversion Tunnel Inlet & Outlet

9.2 Construction Schedule of Diversion Tunnel Inlet & Outlet

9.3 Emergency Action Plan

9.4 Working Drawings Inlet & Outlet Structure

9.5 Resources of Diversion Tunnel Inlet & Outlet

9.6 Temporary Facility Layout of Diversion Tunnel Inlet & Outlet

9.7 Construction Sequence of Inlet & Outlet Structure

9.8 Inspection and Test Plans (ITP)

9.9 Sub-plans for ESMMP-CP

9.10 Environmental Management Active Table

NAM NGIEP 1 HYDROPOWER PROJECT DWP & SS-ESMMP for Construction of River Diversion Structure Works at Inlet and Outlet

NNP1-MS-MD-006-A1

OBAYASHI CORPORATION Revision: A1 November 2014

APPENDIX 9.1

Organization of Diversion Tunnel Inlet & Outlet

NAM NGIEP 1 HYDROPOWER PROJECT Appendix 9.1

As of 31st October 2014

Supervisor

Alexander T. Audian

Supervisor

Akio Igarashi

Chief Engineer

Toshihiko Tange

Civil Engineer Civil Engineer

Kittiphas Moonmueang

Office Engineer

Temporary Brigde

Civil Engineer

Phanmaha Ekalath

Salurmseng Sayjoumoua

Civil Engineer

(OBC Building Works)

Supervisor

Civil Engineer

Re-regulation Dam / Dyke

Surveyer

Supervisor

(Grouting)

Civil Engineer

(Excavation / Diversion) (Tunnel) (Structure) (Excavation & Dam Body) (Powerhouse)

Supervisor

Ho Phi Hoang

Hoang Dinh Noi

(RCC/CVC Plant)

ORGANIZATION CHART

Project Manager

Kazuhiko Chabayashi

Issara Burakhorn

M & E Manager

Main Dam Construction M & E

Chief Engineer M&E Chief Engineer

Ryuichi Miyanohara

Chief Engineer Chief Engineer

ENGINEERING SECTION SAFETY & ENVIRONMENTAL

Environmental Specialist

Road A, Road P1

Civil Engineer

Chief Engineer

Supervisor Supervisor

Road P2,

Road T1, T2, T13

Truong Nguyen Di Khuong

Do Van Khanh

Civil Engineer

Vo Anh Pha

Nguyen Van Trung

Le Tien Hoa

Keita Tamura

Civil Engineer

Saikham Vanpaseuth

Khammeung Chittavong

Diversion Tunnel

Hoang Hai Duong

Supervisor

Boualay Thamavong

Khonesavanh Keophaserth

Assistant

Material Control

Sakda Pongsuk

Fuel Controler

Tinnawit Sriputthirat

Civil Engineer

Kham Nammavong

Assistant

Hua Tan Tai

Survey

Supervisor

Mechanic Erectrician

Construction Manager

Keiji Sasaki

Maintenance


Le Duc Chuyen

Civil Engineer

Chief EngineerChief Engineer

(Structure)

Nguyen Binh Phuong

Nguyen Hong Minh

Civil Engineer

Deputy Construction Manager

Hiroyuki Iyota

Chief Engineer Chief Engineer

Nguyen Anh Quoc

Chief Engineer

Nguyen Ngoc Liem

Store Keeper

Survey Helper Survey Helper


Assistant Surveyer Assistant Surveyer

Nguyen Duc Tuyen

Nguyen Tri Tuc

Surveyer Surveyer

Chief Engineer

Nguyen Ngoc Duan

To Hoang Anh Nguyen Van Tung

Bui Xuan Thai

Thinkonenapha Sybounhueang

Chief Engineer

Assistant Surveyer

Survey Helper


Tomohiro Taguchi

Civil Engineer Civil Engineer Civil Engineer

Songpol Janoh

Yoshitake Higuchi

Ananhxay Insiziengmai Konglor Sotouky

Shopheap NounNgo Thanh Danh Vu Minh Duc Sergio M. Adducul Jr.Le Anh Tu

Dante Bello Anastacio Bounlone Phomphakdy

Phaimany Lounthone Nguyen Huu Tri Nguyen Gia Hieu Pham Hai Duong Ho Cong Minh

Supervisor Ha Bac Son Nguyen Minh Thien

Tran Anh Tuan Ngo Van LuanSombath Khamtayang

Cook

Cook Assistant

Bounpheng Xayyasan


Mitsuo Fukatsu

Admin Assistant

Yeng Leenhiavue

Jedsada Sanggred

CONSTRUCTION SECTION

Phomma Phongoudon

Bounphone Sipaserth


Tran Anh Tuan

Moneta Khounphachan

Le Minh Truc

Tran Anh Kiet

QC Assistant

Nguyen Thi Hoang Minh

Nguyen Cam Nhung

Assistant

Nguyen Viet Thu

Huynh Ngoc Quyen

Souaxiong Briatu

Boutsakorn Somphanthabansouk

Luong Ngoc Loc Luong Pham Duy

QC EngineerQS Engineer

Chief Contract EngineerChief QC EngineerChief QS Engineer

Public RelationContract assistanatDoc. Controller

Santi Sayakoummane

Loley Xayouthone

Safety & Envi. Officer

Chief Engineer

Vanhxay Sengsavang

ADMINISTRATION SECTION

Admin. Manager

Makoto Harada

Chief Admistrator

Shion Ishiguro

ClinicPurchase/LogisticsAccount/Finance General Affair

Takayuki Kimura

Engineering Manager

Shop Drawing

Deputy Eng. Manager

ContractQuality Control

(Laboratory)Document ControlQuantity Survey

Accountant DoctorPurchaser

Souksamone Souliyamath Chimdavong Thepkhamheuang

Maid

Lao & Foreign Staff House

Nurse

Cook

Somboun Chanthavong

Administrator

Soudsakhone Phomarinh

Admin Clerk

Nguyen Tri Phuong ThanhKhamfong Chanthabouly

Suthasinee Thaebthao

DriverJP Staff House

Sounthala HinpaseuthDavone Sisuvong

Air Lorwansai

Ho Van Quoc

Cook Assistant

Maid

Phouvong Sanyanouvong

Account Assistant

Ningthida Vilamongkhoun

Office Maid

Thongxay Xayyasan

Khamdy Khamsy

Air Kham Veow Boulikhan

CAD Operator

Khamhou Bounyavong

Nguyen Ly Kim Ngan

QC Test Helper

Maintenance

Road P1, Camp Yard

RCC/CVC Plant

Bounom Thammavong

Manothai Phaxaysisounon

Vinut Vongphouthone

Soudsada Khounphanya

Takeo TsuchihashiTakanobu Ishii

Phaivan Xayyavong

Chief Engineer

Hisashi Nagasima

Road T4, T7 ~ T11


Civil Engineer Chief Engineer

Quarry /

Aggregate Plant

Office Engineer

Nguyen Ngoc Quang Huy

Wittaya Phuangin

Seiji Nagasaka


NNP1-MS-MD-006-A1


APPENDIX 9.2

Construction Schedule of Diversion Tunnel

Inlet & Outlet

Schedule of River Diversion Structure Works at Inlet and Outlet Appendix 9.2

No. Description

1 Relating Tunnel Work

2 Inlet Structure

3 Outlet Structure

Clearing and Demobilization

Survey, Leveling and Compaction Existing Ground

Leveling Concrete

Bottom Slab

Wall Mountain Side

Wall River Side

2015 NOV

5 10 15 20 25 30

2015 OCT

5 10 15 20 25 30

2015 SEP

5 10 15 20 25 30

2015 AUG

5 10 15 20 25 30

2015 JUL

5 10 15 20 25 30

2015 JUN

5 10 15 20 25 30

2015 MAY

5 10 15 20 25 30

Clearing and Demobilization

2015 JAN 2015 FEB 2015 MAR 2015 APR

5 10 15 20 25 30

Top Slab Part I

Top Slab Part II

Top Slab Part III

Dismantle Top Slab Supporting Part I

Dismantle Top Slab Supporting Part II, III

Bottom Slab Part III

20

Wall Part I

Wall Part II

Scaffolding and Supporting for Top Slab

Arch Shape Side Wall Top Portion

Steel Sliding Formwork disassembling

Survey, Leveling and Compaction Existing Ground

Leveling Concrete

Bottom Slab Part I

Bottom Slab Part II

25

Underground excavation DIII Benching

Demobilize to Outlet

Tunnel Invert Concrete

Steel Sliding Formwork Assembling

Tunnel Arch Lining Concrete

20 25 30

Tunnel Entrance (Inlet Side)

Underground excavation DIII Top heading

25 30 5 10 1530 5 10 15 205 10 15


NNP1-MS-MD-006-A1


APPENDIX 9.3

Emergency Action Plan

NAM NGIEP 1 HYDROPOWER PROJECTAppendix 9.3

Rev. A3 As of 14th October 2014

OBAYASHI CORPORATION

Dr. Rie Ogiwara

Mobile : 020-5559-9502

Administration Manager

Mr. Harada


Mr. Igarashi

Embassy of JapanMedical Attaché

Mr.Sykhamxay

Mobile: 020-2343-4666

Pol.Lt.Col. Wallop Khunmuan

Mobile: +66-81-616-1100

Report (if necessary)

Instruction

054-212-154 (8:00 - 16:00)Emergency 24Hrs. Tel : 054-212-099

+66-42-491-161～3 (ext. 295) (24hrs)Emergency :Ms.Sunan Nokthong

(Chief Nurse)

Mobile: +66-86-857-8279

Hospital (Thai)Bueng Kan Hospital

AmbulanceBolikhamxay Provincial Hospital

054-212-149 (8:00 - 16:00)Emergency 24Hrs. Tel : 020-5508-4966

Report Head of Villagers of Relevant Villages

Pakxan POLICE

054-280-190

054-212-256

Safety Chief Engineer

030-5738-860

EDL

054-280-308

Embassy of JapanUrgent Case

Embassy of Japan

021-414-400

Dept. of Environment

054-790-836

Immigration (Lao)

Immigration (Thai)

Boat

Mr. Ishii

Mr. Nagasaka

Hospital (Thai)Bangkok Hospital

Udon Thani

Mr. Dodo

Mr. Phonsysong

Mr. Phouvieng

Deputy Managing Director

Mr. Tsutsui

+81-3-3811-8153Emergency Assistance Japan

Mr. Sasaki

Mr. Ishiguro 020-59-888-217

Project Manager

Mr. Chabayashi

OBAYASHI Corporation

Overseas Division (Tokyo)

+81-3-5769-1254

Hospital (Lao)Bolikhamxay Provincial HospitalManaging Director

Mr. Yamabayashi

Hospital / Immigration / Embassy / Others

RMUResettlement Management Unit

Deputy Director

Mr. Khamsing Sayphouvong

020-2233-5546

+66-42-343-111Emergency : Mr.Prayoon Thavon( John)

(International Marketing Executive)

Mobile: +66-85-010-6338

020-22-422-582

020-59-888-218

Helicopter

021-512-027

020-59-888-205

020-59-565-888

Mr. Tsutsui 020-55-566-959

020-59-888-204

020-59-888-213

Mr. Harada 020-59-888-208

020-59-888-201

020-59-888-206Mr. Tsuchihashi

Hatsaykham

Emergency Plan for Nam Ngiep 1 Hydropower Project

Not Only Accident,

Also Environmental Incident/Hazard

Discoverer

Site Engineer

Fire Station

191

Nam Ngiep 1 Power Company

Pakxan Office 054-280-168

Obayashi Corporation

Pakxan Office 054-790-686

OBAYASHI Corporation

Mr. Chabayashi

Mr. Kimura

VTE Office 021-265-185

Mr. Yamabayashi

Person to Take Action

HelicopterLao Skyway

Tel : 021-512-027

Name of Head

Mr. Touy Inthavong

Mr. Boonhieng 020-5551-4891

Mr.Mone

Mobile : 020-2233-9943Contact No.

020-5614-9468

020-5549-1810

020-5977-4434Hat Gniun

Thaheua

Nonsomboun

Name of Village

ACCIDENT

INCIDENT

TAKE ACTION- Send injured person to hospital- Urgent countermeasure- Inform and explain to authorities- Record- etc.


NNP1-MS-MD-006-A1


APPENDIX 9.4

Working Drawings

for Inlet & Outlet Structure Works

- Working drawings have been submitted separately.


NNP1-MS-MD-006-A1


APPENDIX 9.5

Resource for Inlet & Outlet Structure Works

NAM NGIEP 1 HYDROPOWER PROJECT Detailed Works Program for Construction of River Diversion Structure Works at Inlet and Outlet

Appendix 9.5

9.5 Resources

1 2 3 4 5 6 7 8 9 10 11 12

1 Inlet Diversion Tunnel 1. Excavator (0.7 m3) 1 1 1 1 1

2. Bulldozer (21 ton) 1

3. Compactor Roller (10 ton) 1

4. Motor Grader (12 ton) 1

5. Mobile Concrete Pump Truck (30 m3/h) 2 2 2 2 2

6. Concrete Mixer Truck (5m3) 5 5 5 5 5

7. Mobile Crane Truck (25 ton, 35 ton) 2 2 2 2 2

8. Unit Truck with Crane (5 ton) 1 1 1 1 1

9. Service Truck (2-4 tons) 2 2 2 2 2

10. Air Compressor (375 cfm) 1 1 1 1 1

11. Generator (600 kVA) 1 1 1 1 1

12. Concrete Vibrator 4 4 4 4 4

13. Submersible Pump (2” - 6”) 4 4 4 4 4

14. Welding Machine 4 4 4 4 4

15. Cutter machine 2 2 2 2 2

16. Bar Bender machine 1 1 1 1 1

17. Scaffolding 600 1200 1200

OBAYASHI CORPORATION Revision : A1

No. Location Resource

Working Month

Remark2015

NAM NGIEP 1 HYDROPOWER PROJECT Detailed Works Program for Construction of Inlet and Outlet Structure Works

Appendix 9.5

1 2 3 4 5 6 7 8 9 10 11 12

2 Outlet Diversion Tunnel 1. Excavator (0.7 m3) 1

2. Bulldozer (21 tons) 1

3. Compactor Roller (10 tons) 1

4. Motor Grader (12 tons) 1

5. Mobile Concrete Pump Truck (30 m3/h) 1

6. Concrete Mixer Truck (5m3) 5

7. Mobile Crane Truck (25 ton, 35 ton) 2

8. Unit Truck with Crane (5 ton) 1

9. Service Truck (2-4 tons) 2

10. Air Compressor (375 cfm) 1

11. Generator (600 kVA) 1

12. Concrete Vibrator 2

13. Submersible Pump (2” - 6”) 4

14. Welding Machine 1

15. Cutter machine 1

16. Bar Bender machine 1

17. Scaffolding

OBAYASHI CORPORATION Revision : A1

RemarkNo. Location Resource

Working Month

2015


NNP1-MS-MD-006-A1


APPENDIX 9.6

Temporary Facility Layout for River Diversion

Tunnel Inlet & Outlet

D-1

8

6,0

0

6,00

5,35

5,3

5

RestArea

Toilet

Generator

Air CompMobile

Equipment

Mobile Crane

Concrete Mixer Truck

Moblie Concrete Pump

Unit Truck with Crane

Service Truck

Oiler Truck

Excavator

REVISION

No.

DESCRIPTION

DATE

CON

TRACTOR:

DRAWIN

G NO

.SCALE:

TITLEN

AM N

GIEP 1 POW

ER COM

PANY

OW

NER:

OBAYASHI CO

RPORATIO

NREV

NAM

NGIEP 1 HYDRO

POW

ER PROJECT

DESIGNED

DRAWN

CHECKED

ISSUED

TITLEN

AME

DATE

1/500

LAYOU

T PLAN TEM

PORARY FACILITY AT IN

LET

WELDIN

D SHOP

AND STO

RAGE

CEMEN

T STORAGE

TEMPO

RARY

BARED WIRE FENCE

BARED WIRE FENCE

BARED WIRE FENCE

BARED WIRE FENCE

BARED WIRE FENCE

WC

STEEL RIBFABRICATIO

N YARD

TEMP M

IXER HOU

SE

GEN

ERA TOR YARD

PLUM

BER CAMP

ELECTRICAL STORAGE

WATER RESEVO

IRSIZE = 3x3x1 m

.

SEDNM

ENT PO

ND

FOR W

ASHED M

IXERSIZE = 4x4x1 m

.

LAYOU

T PLANBATCHIN

G PLANT

REBAR FABRICATION

YARD

FORM

WO

RK FABRICATION

YARD

LAYOUTBATCHING PLANT

RIGHT TUNNELLING CO.,LTD.REVIEWED :

NAM NGIEP 1 HYDROPOWER PROJECT

-

CHECKED :APPROVED :

DATE

DESIGNED :DRAWN :CHECKED :

NATTAVUT P.KACHAGORN S.

DRAWING NO.REV.

.................................................................................................................................

.........................

DATEAPPROVED

CHECKEDDATE

REVIEWEDDATE

REV.

01 02 03

-DESCRIPTION

SUBMITTED :SURACHAT D.

OBAYASHI CORPORATION

SHEET NO.-

DATECONTRACT NO.

PREFEASIBILITY STUDYFEASIBILITY STUDYBASIC DESIGN

TENDER DESIGNCONSTRUCTION DESIGN

AS-BUILT DRAWING

INFORMATIONREFERENCE

REVIEW & COMMENTAPPROVAL

PHASE :

ATTN FOR :

............................................................................................................................................................................

BLACK WATER

GRAY W

ATER

SEEPAGE TANK

SEPTIC TANK

TREATMENT TANK

CAMP LAYO

UTTEM

PORARY CAM

P

RT-NN1-FAC-0C-01

RIGHT TUNNELLING

CO.,LTD.

REVIEWED :

NAM NG

IEP 1 HYDROPO

WER PROJECT

-

CHECKED :

APPROVED :

DATE

DESIGNED :

DRAWN :

CHECKED :

SURACHAT D.

NATTAVUT P.

SURACHAT D.

DRAWING

NO.REV.00

...........................................

...........................................

...........................................

.........................

DATEAPPRO

VEDCHECKED

DATEREVIEW

EDDATE

REV.

01 02 03

-DESCRIPTION

SUBMITTED :

SURACHAT D.

OBAYASHI CO

RPORATIO

N

SHEET NO.-

DATECO

NTRACT NO.

PREFEASIBILITY STUDYFEASIBILITY STUDYBASIC DESIGN

TENDER DESIGNCO

NSTRUCTION DESIGN

AS-BUILT DRAWING

INFORM

ATIONREFERENCE

REVIEW & COM

MENT

APPROVAL

PHASE :

ATTN FOR :

...........................................

...........................................

...........................................

...........................................


NNP1-MS-MD-006-A1


APPENDIX 9.7

Construction Sequence of Inlet & Outlet

Structure Works

1 : 0.3

1 : 0.3

1 : 0.5

1 : 0.5

EL

.18

1.0

00

EL

.18

5.3

55

4355 5000

EL

.19

0.3

55

EL

.17

9.0

00

EL

.19

1.8

55

2000 1500

EL

. 17

9.0

00m

EL

. 18

6.0

00m

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

EL

. 18

4.0

00m

EL

.18

5.3

55

INL

ET

AX

IS

1 : 0.5

1 : 0.3

150

00

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

n

EL

.18

1.0

00

DIII T

ype

Excavatio

n

Sh

otc

rete

t=2

50

Ste

p 1

Mo

biliz

atio

n

Afte

r op

en

exca

va

tion

an

d s

lop

e p

rote

ctio

n,

un

de

rgro

un

d e

xca

va

tion

typ

e D

III (~S

ta 1

5.0

0) a

t inle

t

co

mp

lete

d. T

he

inle

t stru

ctu

re w

ork

s o

f div

ers

ion

tun

ne

l

will b

e m

ob

ilize

d a

nd

co

mm

en

ce

me

nt w

ork

.

7000

7000

EL

.18

1.1

16

EL

.19

0.3

55

EL

.19

1.8

55

EL

.20

0.5

00

Ste

el S

up

po

rt

H-2

00

Fo

rep

olin

g

DB

25

L=

30

00

Sh

otc

rete

t=2

50

Fo

rep

olin

g

DB

25

L=

30

00

Ro

ck B

olt

DB

25

L=

40

00

Inle

t Stru

ctu

re

Inle

t Stru

ctu

re

Orig

ina

l Gro

un

d S

urfa

ce

Se

ctio

n

1 : 0.5

EL

.17

8.9

00

EL

.18

4.4

00

g =

-39.0

69%

EL

.18

3.9

00

EL

.18

6.0

00

151

00

143

00

1700

INL

ET

AX

ISE

L.1

85.3

55

Orig

ina

l Gro

un

d S

urfa

ce

Le

ve

ling

an

d c

om

pa

ctio

n

exis

ting

gro

un

dE

L.1

81.0

00

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

n

1 : 0.3

1 : 0.3

2000

Vary

Vary

2000

EL

.18

5.3

55 V

ary

EL

.17

8.9

00

INL

ET

AX

IS

Botto

m o

f Levelin

g C

oncre

te

Exca

va

tion

, leve

ling

an

d c

om

pa

ctio

n th

e e

xis

ting

gro

un

d u

ntil re

ach

to b

otto

m o

f leve

ling

co

ncrte

leve

l (Le

ve

ling

co

ncre

te is

10

0 m

m th

ick u

nd

er

the

ba

se

sla

b)

Ste

p 2

Le

ve

ling

an

d

Co

mp

actio

n

Exis

ting

Gro

un

d

Se

ctio

n

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

n

1 : 0.5

EL

.17

9.0

00

EL

.18

4.5

00

g =

-39.0

69%

EL

.18

4.0

00

EL

.18

6.0

00

150

00

145

00

1500

INL

ET

AX

ISE

L.1

85.3

55

Orig

ina

l Gro

un

d S

urfa

ce

Le

ve

ling

co

ncre

te

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

1 : 0.3

1 : 0.3

2000

Vary

2000

Vary

EL

.17

9.0

00

EL

.18

5.3

55

INL

ET

AX

IS

Top

Levelin

g C

oncre

te

Afte

r leve

ling

an

d c

om

pa

ctio

n th

e e

xis

ting

gro

un

d c

om

ple

ted

, the

leve

ling

co

ncrte

tha

t is

cla

ss 1

4 M

Pa

an

d 1

00

mm

thic

k s

ha

ll be

pro

vid

ed

to le

ve

l the

su

rface

Ste

p 3

Po

urin

g L

eve

ling

Co

ncre

te

Vary

Se

ctio

n

1 : 0.5

EL

.18

1.1

16

EL

.18

4.0

00

150

00

125

00

1500

INL

ET

AX

ISE

L.1

85.3

55

Orig

ina

l Gro

un

d S

urfa

ce

EL

.18

1.0

00

g =

-0.7

662%

g =

-39.0

69%

EL

.18

6.0

00

1

2

3

EL

.17

9.0

00

2000

Bo

ttom

sla

b

co

ncre

ting

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

1 : 0.3

1 : 0.3

Se

ctio

n

2000

2000

Vary

EL

.17

9.0

00

EL

.18

5.3

55

INL

ET

AX

IS

Vary

EL.1

81.0

00

~ 1

81

.116

Vary

Vary

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

nS

tep

4 B

otto

m S

lab

Co

nstru

ctio

n

Se

qu

en

ce

of c

astin

g a

rea

will b

eg

in fro

m lo

we

r

po

rtion

(EL

.18

1.0

00

) to h

igh

er p

ortio

n

(EL

.18

6.0

00

). Th

e b

otto

m s

lab

co

ncre

ting

ma

y b

e

div

ide

d in

to 3

pa

rt as fo

llow

ing

1. L

ow

er p

ortio

n (E

L.1

81

.00

0-1

81

.11

6)

2. S

lop

e p

ortio

n (E

L.1

81

.11

6-1

86

.00

0)

3. T

op

po

rtion

(EL

.18

6.0

00

)

Co

ncre

te c

lass fo

r bo

ttom

sla

b a

t inle

t is 2

4 M

Pa

.

Bo

ttom

sla

b

co

ncre

ting

1 : 0.5

g =

-39.0

69%

EL

.18

6.0

00

150

00

145

00

1500

EL

.18

1.0

00

EL

.18

1.1

16

EL

.19

0.3

55

EL

.19

1.8

55

C.J

.

C.J

.

C.J

.

@ ~3.0 m per one lift

100

00

5000

Wa

ll co

ncre

ting

EL

.19

2.3

08

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

n

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

1 : 0.3

1 : 0.3

2388

EL

.17

9.0

00

EL.1

81.0

00

~ 1

81

.116

2388

Vary

Vary

EL

.18

5.3

55

INL

ET

AX

IS

C.J

.

C.J

.

C.J

.

Vary


Wa

ll

co

ncre

ting

Ste

p 5

Wa

ll Lo

we

r Po

rtion

Co

nstru

ctio

n

Ca

stin

g c

on

cre

te w

all a

t low

er p

ortio

n a

rea

(EL

.18

1.0

00

- EL

.19

2.3

08

)

Th

e h

eig

ht o

f co

ncre

te c

astin

g le

ve

l is a

bo

ut

3.0

m p

er o

ne

lift.

Co

ncre

te c

lass fo

r wa

ll at in

let is

24

MP

a.

C.J

.

C.J

.

Se

ctio

n

EL

.19

0.3

55

EL

.19

1.8

55

C.J

.

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

n

1 : 0.5

EL

.18

6.0

00

150

00

125

00

3000

Orig

ina

l Gro

un

d S

urfa

ce

EL

.18

1.0

00

EL

.18

1.1

16

EL

.19

0.3

55

EL

.19

1.8

55

EL

.19

2.3

08

EL

.19

6.4

14

@ ~ 3.0 m per one lift

C.J

.

C.J

.

C.J

.

C.J

.

C.J

.

Wa

ll co

ncre

ting

Th

is p

art o

f wa

ll will b

e c

aste

d

tog

eth

er w

ith to

p s

lab

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

1 : 0.3

1 : 0.3

1 : 0.3

1500

1500

190

00

7000

7000

2000


To

p S

lab

Cha

mfe

r

500

x5

00

mm

Wa

ll

co

ncre

ting

Wa

ll

co

ncre

ting

Ste

p 6

Wa

ll Hig

he

r Po

rtion

Co

nstru

ctio

n

Ca

stin

g c

on

cre

te w

all a

t hig

he

r po

rtion

are

a

(EL

.18

1.1

16

- EL

.19

6.4

14

)

Th

e h

eig

ht o

f co

ncre

te c

astin

g le

ve

l is a

bo

ut

3.0

m p

er o

ne

lift.

Co

ncre

te c

lass fo

r wa

ll at in

let is

24

MP

a.

Se

ctio

n

C.J

.

C.J

.

C.J

.

C.J

.C

.J.

C.J

.

C.J

.

C.J

.

C.J

.C

.J.

C.J

.

C.J

.

C.J

.

C.J

.C

.J.

1 : 0.5

EL

.18

4.0

00

EL

.18

6.0

00

Orig

ina

l Gro

un

d S

urfa

ce

EL

.18

1.0

00

INL

ET

AX

ISE

L.1

85.3

55

100

00

Exte

nd

arc

h s

ha

pe

top

po

rtion

of s

ide

wa

ll

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

1 : 0.3

1 : 0.3

2000

EL

.17

9.0

00

EL.1

81.0

00

~ 1

81

.116

2000

Vary

Vary

EL

.18

5.3

55

INL

ET

AX

IS

1000

2000

3000

4000

5000

500

Exte

nd

arc

h s

ha

pe

top

po

rtion

of s

ide

wa

ll

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

nS

tep

7 E

xte

nd

the

Arc

h S

ha

pe

To

p P

ortio

n o

f Sid

e W

all

1 In

sta

ll sca

ffold

ing

an

d s

up

po

rting

for s

offit fo

rm

2 C

hip

pin

g c

on

cre

te s

urfa

ce

for c

on

stru

ctio

n jo

int

3 In

sta

ll arc

h s

ha

pe

form

wo

rk a

cco

rdin

g to

su

rve

y

alig

nm

en

t

4 P

ou

ring

co

ncre

te u

ntil re

ach

to s

pe

cifie

d le

ve

l

EL

.19

6.4

14

Vary

Se

ctio

n

1 : 0.5

EL

.18

4.0

00

EL

.18

6.0

00

EL

.18

1.0

00

INL

ET

AX

ISE

L.1

85.3

55

1

2

3

EL

.19

1.8

55

EL

.20

0.5

00

3000

2500

150

00

100

00

EL

.18

1.1

16

g =

-39.0

69%

g =

-0.7

662%

g =

-39.0

69%

EL

.19

7.7

15

EL

.19

6.4

14

To

p s

lab

co

ncre

ting

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

n

1 : 0.3

1 : 0.3

1 : 0.3

1500

1500

190

00

7000

7000

2000

Vary

Cha

mfe

r

500

x5

00

mm

Vary Vary

Ste

p 8

To

p S

lab

Co

nstru

ctio

n

Se

ctio

n

4086

Orig

ina

l Gro

un

d S

urfa

ce

To

p s

lab

co

ncre

ting

Se

qu

en

ce

of c

astin

g a

rea

will b

eg

in fro

m lo

we

r

po

rtion

(EL

.19

1.8

55

) to h

igh

er p

ortio

n

(EL

.20

0.5

00

). Th

e to

p s

lab

co

ncre

ting

ma

y b

e

div

ide

d in

to 3

pa

rt as fo

llow

ing

1. L

ow

er p

ortio

n (E

L.1

91

.85

5)

2. S

lop

e p

ortio

n (E

L.1

91

.85

5-1

97

.71

5)

3. T

op

po

rtion

(EL

.19

7.7

15

-20

0.5

00

)

Co

ncre

te c

lass fo

r top

sla

b a

t inle

t is 2

4 M

Pa

.

1 : 0.5

EL

.18

4.0

00

EL

.18

6.0

00

EL

.18

1.0

00

INL

ET

AX

ISE

L.1

85.3

55

EL

.19

1.8

55

EL

.20

0.5

00

3000

2500

150

00

EL

.18

1.1

16

100

00

g =

-39.0

69%

g =

-39.0

69%

g =

-0.7

662%

100

00

EL

.19

7.7

15

Div

ers

ion

tun

nel

Div

ers

ion

inle

t

1 : 0.3

1 : 0.3

2000

EL

.17

9.0

00

EL.1

81.0

00

~ 1

81

.116

2000

Vary

Vary

EL

.18

5.3

55

INL

ET

AX

IS

Vary

Se

ctio

n

EL

.19

1.8

55

Vary 4355 5000 1500

EL

.19

0.3

55

Se

qu

en

ce

of In

let S

tructu

re C

onstru

ctio

nS

tep

9 D

em

ob

iliza

tion

Dis

ma

ntle

all fo

rmw

ork

, cle

an

ing

an

d

de

mo

biliz

atio

n

Se

qu

en

ce

of O

utle

t Stru

ctu

re C

onstru

ctio

n

1 : 1

EL

.17

6.0

00

EL

.18

0.3

55

EL

.18

5.5

00

Div

ers

ion

tun

nel

Div

ers

ion

outle

t

120

00

EL

.18

2.0

00

Tun

ne

l Axis

4355 5000

Co

ncre

te W

all 5

00

mm

Th

ick.

6500

10000

Afte

r co

mp

letio

n o

f arc

h lin

ing

co

ncre

te

of tu

nn

el a

nd

dis

asse

mb

ly th

e s

tee

l

slid

ing

form

wo

rk c

om

ple

ted

as w

ell.

Th

e o

utle

t stru

ctu

re w

ork

of d

ive

rsio

n

tun

ne

l will b

e m

ob

ilize

d a

nd

co

mm

en

ce

me

nt w

ork

Arc

h L

inin

g C

on

cre

te

Inve

rt Co

ncre

te

Ste

p 1

Mo

biliz

atio

n

Co

ncre

te S

lab

50

0m

m T

hic

k.

Orig

ina

l Gro

un

d S

urfa

ce

EL

.17

6.0

00

Orig

ina

l Gro

un

d S

urfa

ce

EL

.18

2.0

00

EL

.18

2.0

00

100

00

6500

Se

ctio

n

10000

Co

ncre

te W

all 5

00

mm

Th

ick.

Co

ncre

te W

all 5

00

mm

Th

ick

EL

.18

0.3

55

EL

.17

5.5

00

Top

Levelin

g C

oncre

te

Co

ncre

te S

lab

50

0m

m T

hic

k.

Tun

ne

l Axis

Inve

rt Co

ncre

te

Se

qu

en

ce

of O

utle

t Stru

ctu

re C

onstru

ctio

nS

tep

2 L

eve

ling

Co

ncre

te

for B

otto

m S

lab

1 : 1

EL

.17

6.0

00

EL

.18

0.3

55

EL

.18

5.5

00

Div

ers

ion

tun

nel

Div

ers

ion

outle

t

120

00

Orig

ina

l Gro

un

d S

urfa

ce

EL

.17

6.0

00

Orig

ina

l Gro

un

d S

urfa

ce

EL

.18

2.0

00

EL

.18

2.0

00

100

00

6500

Se

ctio

n

EL

.18

2.0

00

Tun

ne

l Axis

4355 5000

10000

Co

ncre

te W

all 5

00

mm

Th

ick.

Co

ncre

te W

all 5

00

mm

Th

ick

EL

.18

0.3

55

Le

ve

ling

, Co

mp

actio

n a

nd

Po

ur

Le

ve

ling

Co

ncre

t 10

0m

m T

hic

k

Co

ncre

te W

all 5

00

mm

Th

ick.

Le

ve

ling

, Co

mp

actio

n a

nd

Po

ur

Le

ve

ling

Co

ncre

t 10

0m

m T

hic

k

EL

.17

5.5

00

Top

Levelin

g C

oncre

te

6500

10000

Exca

va

tion

, leve

ling

an

d c

om

pa

ctio

n

the

exis

ting

gro

un

d u

ntil re

ach

to

bo

ttom

of le

ve

ling

co

ncrte

leve

l

(Le

ve

ling

co

ncre

te is

10

0 m

m th

ick

un

de

r the

bo

ttom

sla

b)

Se

qu

en

ce

of O

utle

t Stru

ctu

re C

onstru

ctio

n

1 : 1

EL

.17

6.0

00

EL

.18

0.3

55

EL

.18

5.5

00

Div

ers

ion

tun

nel

Div

ers

ion

outle

t

120

00

Orig

ina

l Gro

un

d S

urfa

ce

EL

.17

6.0

00

Orig

ina

l Gro

un

d S

urfa

ce

EL

.18

2.0

00

EL

.18

2.0

00

100

00

6500

Se

ctio

n

EL

.18

2.0

00

Tun

ne

l Axis

4355 5000

10000

Co

ncre

te W

all 5

00

mm

Th

ick.

Co

ncre

te W

all 5

00

mm

Th

ick

EL

.18

0.3

55

Co

ncre

te W

all 5

00

mm

Th

ick.

EL

.17

5.5

00

Top

Levelin

g C

oncre

te

6500

10000

Ste

p 3

Bo

ttom

Sla

b

Co

nstru

ctio

n

Sla

b 5

00

mm

Th

ick C

on

cre

ting

Sla

b 5

00

mm

Th

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NNP1-MS-MD-006-A1


APPENDIX 9.8

Inspection and Test Plans (ITP)

NAM NGIEP 1 HYDROPOWER PROJECT DWP SS-ESMMP for River Diversion Structure Works at Inlet Outlet

Appendix 9.8

S/C OC Own

1 Earth Works

Check Dimensions, Formation Level TS 2.2, 2.6 Visual inspection / survey Accordance with TS 2.2, 2.6 I I R At Site After excavation Checklist

Rock Quality TS 2.2, 2.6 Visual inspection Accordance with TS 2.2, 2.6 I I R At Site After excavation Checklist

2 Structure Works

Material TS 6.15 Document review Accordance with SD40 R R R At Site on the delivery Mil Certificate

2.1 Rebar installation TS 6.15 Visual inspection / survey Accordance with TS 6.15 &WD I I R At Site Each casting Checklist

Formworks Check Dimensions ** A) TS 6.17 Visual inspection / survey Accordance with TS 6.17.7 &WD I I R At Site Each casting Checklist

Concrete Work

Fine Aggregate Sieve Analysis TS 5.2,3 & 5.5 ASTM C136 (AASHTO T27)As required by ASTM C136 /

AASHTO T27R R R Labo. Once prior to commencement Test Report

Coarse Aggregate Sieve Analysis TS 5.2,3 & 5.5 ASTM C136 (AASHTO T27)As required by ASTM C136 /

AASHTO T27R R R Labo. Once prior to commencement Test Report

Water Physical & Chemical Properties TS 5.2.4 & 5.5 ACI 318As required by ACI 318 / other

relevant Specs.R R R Labo. Once prior to commencement Test Report

Concreting Compressive Strength (Normal Curing) TS 6.6 & 6.18 ASTM C39 (AASHTO T22) As required by ASTM C39 I I R Labo.1time/every 100m3/1day per each class

at 7 & 28 daysTest Report

Concreting Slump TS 6.6 & 6.18 ASTM C143 (AASHTO T119) As required by ASTM C143 I I R At Site1st Batch and 1time/every 50m3/1day

per each classChecklist

Legend: S/C: Subcontractor & Supplier Accredited Laboratories:

OC: The Contractor (Obayashi)

Own: The Owner (NNPC)

H: Hold Point

I: Inspection

W: Witness by Owner (optional)

R: Document Review

** A) Referring to TS 6.17.7, the tolerance is +/- 30mm. However, thickness of footing shall be -5mm to 50mm.

Rebar Work

Description (Properties to be tested) Specification Inspection and Test MethodVerifying

DocumentFrequency

9.8 INSPECTION AND TEST PLAN FOR STRUCTURE WORK AT INLET AND OUTLET

ItemTesting / Inspection

ItemsRemarks

Inspection byAcceptable Criteria

Testing

Location

2. TBA

1.1 Excavation

3. TBA

Name Address

1. TBA

OBAYASHI CORPORATIONRevision : A1


NNP1-MS-MD-006-A1


APPENDIX 9.9

Sub-plans for ESMMP-CP

ERM-SIAM NAM NGIEP 1 HYDROPOWER PROJECT

ESMMP-CP NOVEMBER, 2014

Appendix 9.9 SUB-PLANS for ESMMP-CP of Nam Ngiep 1 Hydropower Project Sub-plans are proposed as guidelines for environmental implementation during construction

phase and for minimizing the environmental impact of the Project. These 21 sub-plans include:

SP01: Erosion and sediment control

SP02: Water Availability and Pollution Control

SP03: Emission and dust control

SP04: Noise and Vibration

SP05: Waste management

SP06: Hazardous Material Management

SP07: Vegetation clearing

SP08: Landscaping and re-vegetation

SP09: Protected Area Management

SP10: Biodiversity Management

SP11: Spoil Disposal

SP12: Quarry and construction layout

SP13: Unexploded ordnance (UXO) survey and disposal

SP14: Construction of work camps

SP15: Traffic and access

SP16: Training and Awareness

SP17: Project personnel health program

SP18: Public Safety

SP19: Damage to Properties and Facilities

SP20: Emergency Preparedness

SP21: Cultural Resources


NNP1-MS-MD-006-A1


APPENDIX 9.10

Environmental Management Activity Table

Appendix 9.10

Environmental Management Activity Table for Inlet and Outlet Structure Works

Sub-Plan Item Monitoring

Method Monitoring Frequency

ON-SITE IMPLEMENTATION

SP01 Erosion and Sediment

Control Visual Weekly or Heavy rain

Structure works at Inlet and Outlet portal of River Diversion Tunnel will be carried out during

the dry season, refer to the construction schedule (Appendix 9.2).

At the Inlet portal, the level of subgrade along riverside will be higher than the water level,

allowing dry working conditions.

At the Outlet portal before completion of temporary flood protection dike, dry conditions will be

kept by remaining existing ground.

At Outlet portal after completion of the dike, dry condition work will be kept by this dike.

At Inlet and Outlet portal, there is no inflow of mountain runoff.

The excavated slope area of Inlet and Outlet portal will be protected by shotcrete with rock

bolts, as soon as they are excavated.

Bunds from excavated material will be constructed around excavation areas, to reduce rock

and soil entering the River. This will also be used as a safety measure to ensure the safety of

excavator operators. Bund designs can be referred to in Appendix 9.6.

All slopes will be cleaned from loose materials before steel re-enforcements and shotcrete is

applied.

SP02 Water Availability and

Pollution Control Visual Routine

Open ditches will be constructed as part of access roads T4 and T13, these will reduce run-off

from upper slopes entering excavation areas.

Due to the small working area, the cement batching plant for shotcrete will be temporarily

constructed at Disposal Area No.1. The cement mix will then be transported to site as needed;

site layout is included in Appendix 9.6. All cement transport trucks will be washed at the

batching plant.

All structural work will be carried out during the dry season, but as a provision silt fencing or

similar may be installed around lower areas of site if needed.

SP03 Emission and Dust Control Visual Daily

Water spraying vehicle will be provided in active construction sites and along access roads as

needed.

Village roads will also be sprayed in the case of heavy transportation vehicles passing through,

with a minimum of twice daily during the dry season.




SP05 Waste Management Visual Each time

All waste from lunch and common areas should be collected and later transported back to

worker camps.

Section 4.3 in Part 1 of the DWP illustrates Temporary Facilities; Disposal Area No.2 and

Workers Camp No.2, where all on site waste should be transported to.

General construction waste, such a steel reinforcements, will be stockpiled on site and then

transferred to Worker Camp No.2.

Worker camps will separate all waste into recycle and general waste. A large collection bin

(6m3) will then be provided by the Urban Planning Development Organization and will

collected and dispose of general waste at the Paksan Landfill Site. Un-used cement from shotcrete will not be disposed of on site or near waterways.

SP06 Hazardous Material

Management Visual Routine

All fuels for earthworks machinery are stored at worker camp sites in specially designed

areas, with mobile fuel trucks used for refueling of machinery.

SP13 Unexploded Ordinance

(UXO) Survey and Disposal

Visual Routine

UXO clearance has been carried out within the Inlet and Outlet areas by NNP1 before the beginning of any construction activities.

If any UXO are uncovered all work is to stop immediately and NNP1 is to be contacted.

No work is to resume without clearance from the UXO Contractor Company or NNP1.

SP15 Traffic and Access Visual Routine

Cement trucks used for shotcrete will use access road T4 and T13. These trucks will be

restricted to 25km/h.

There will be normal dayshift hours for the structure works, no night shift is expected.

Regularly monitoring of traffic conditions will be conducted as part of the weekly Environmental,

Health and Safety inspection, with main focus being driving speeds around the Project site.

SP16 Training and Awareness Visual / Verbal Routine

All new employees will be required to complete Induction Training from OC/NNP1 prior to commencing

any work on site.

In this training, the Contractor will highlight site rule/regulation and safety & environmental issues.

A register of induction training will be maintained and can be provided to NNP1 on request.

Monthly safety mass meetings will be conducted with all employees, and will cover all relevant health

and safety issues on site.

Daily tool box meetings will also be conducted to bring further awareness to environmental

health and safety issues.

SP17 Project Personnel Health

Program Visual / Verbal Routine

Regarding the content of the Section 6 in this document mainly, the tool box meeting will be carried out before commencement works.

Health Awareness Training will be carried out for all personnel in the monthly mass meeting.

First aid kit will be prepared at site properly.




SP18 Public Safety Visual / Asking Routine

Traffic signage will be installed at sensitive locations around the construction area.

The area is already closed to the public, however for safety of workers, signs and barriers will

be installed around high risk areas, such as along access roads around excavation zone.

SP20 Emergency Preparedness Visual Weekly

Referring to the emergency action plan in Appendix 9.3, the emergency response procedures, emergency contact numbers and communication and reporting procedures will be clearly displayed and each staff always carry it.

First aid kit will be prepared at site properly

Hazardous materials will be stored on the permitted area only and according to the instruction by the authorities, the facilities and equipment for firefighting shall be prepared.

SP21 Cultural Resource Visual Each time

The Owner had been already confirmed that there were no physical and cultural resources along

the Inlet and Outlet.

If the contractor will find the new physical and cultural resources during construction, the Contractor shall

stop the works and inform the Owner immediately.

The above table is the key environmental management activities that are to be implemented at the site.