lower likhu hydropower project (28.1mw)swetgangahydropower.com/uploads/downloads/progress...

SWET GANGA HYDROPOWER & CONSTRUCTION LIMITED Sankha Park, Dhumbarahi, G.P.O.Box 19737, Kathmandu Nepal Site Office, Sirise Ramechhap

SANIMA HYDRO AND ENGINEERING P.LTD Shankha Park, Dhumbarahi, Kathmandu M.C, Ward no.: 04, Nepal G. P.O. Box. 19737, Kathmandu, Nepal

Tel: (977-1) 4373030, 4372828, 4015788 Fax: (977-1) 4015799

Email: [email protected], Web: www.sanimahydro.com.np

LOWER LIKHU HYDROPOWER PROJECT (28.1MW)

MONTHLY PROGRESS REPORT # 13

April, 2019

http://www.sanimahydro.com.np/

SWET GANGA HYDROPOWER & CONSTRUCTION LIMITED Sankha Park, Dhumbarahi, G.P.O.Box 19737, Kathmandu Nepal Site Office, Sirise Ramechhap

SANIMA HYDRO AND ENGINEERING P.LTD Shankha Park, Dhumbarahi, Kathmandu M.C, Ward no.: 04, Nepal G. P.O. Box. 19737, Kathmandu, Nepal

Tel: (977-1) 4373030, 4372828, 4015788 Fax: (977-1) 4015799

Email: [email protected], Web: www.sanimahydro.com.np

LOWER LIKHU HYDROPOWER PROJECT (28.1 MW)

MONTHLY PROGRESS REPORT # 13

April, 2019

Signature Date

Prepared by:

Ranjit Nepal

Checked by:

Sudip Chapagain

Approved by:

Bhojraj Paudel

http://www.sanimahydro.com.np/

Swet Ganga Hydropower & Construction Ltd. Monthly Progress Report

Lower Likhu Hydropower Project (28.1 MW) April, 2019

i Sanima Hydro and Engineering (P.) Ltd.

Table of Contents

1 PROJECT OVERVIEW AND INSTITUTIONAL ARRANGEMENT ................................................ 1

2 KEY DATES ................................................................................................................................... 2

3 CONTRACT PACKAGES AND IMPLEMENTATION ..................................................................... 2

4 FINANCING .................................................................................................................................... 2

5 RESOURCES AT SITE .................................................................................................................. 3

6. CIVIL CONSTRUCTION WORK PROGRESS .............................................................................. 5

6. 1 HEADWORKS ............................................................................................................................ 5

6. 2 TUNNEL ..................................................................................................................................... 7

6.2.1. HRT INLET PORTAL ........................................................................................................ 7

6.2.2. SETI OUTLET PORTAL .................................................................................................... 8

6.2.3. SETI INLETLET PORTAL ................................................................................................. 9

6.2.4. POKU OUTLET PORTAL ................................................................................................ 10

6.2.5. POKU INLETLET PORTAL ............................................................................................. 11

6.2.6. HRT OUTLET PORTAL .................................................................................................. 12

7. SURGE SHAFT ........................................................................................................................... 13

8. TAILRACE ................................................................................................................................... 14

9. SOCIAL AND ENVIRONMENT ................................................................................................... 14

10. EQUIPMENT BREAKDOWN .................................................................................................... 15

11. VISITORS OF THE MONTH ..................................................................................................... 15

12. NOTES: ..................................................................................................................................... 15

13. ACCIDENT ................................................................................................................................ 16

14. PHOTOS ................................................................................................................................... 16

15. PROGRESS CHART ................................................................................................................. 22



ii Sanima Hydro and Engineering (P.) Ltd.

List of Figures

Figure 1: A View of downstream flood wall ...................................................................................... 6

Figure 2: A view of HRT inlet portal ................................................................................................. 7

Figure 3: A view of Seti outlet portal ................................................................................................ 8

Figure 4: A view of Seti inlet portal ................................................................................................... 9

Figure 5: A view of Poku outlet ...................................................................................................... 10

Figure 6: A view of Poku Inlet portal .............................................................................................. 11

Figure 7: A view of HRT outlet portal ............................................................................................. 12

Figure 8: View of surge shaft area ................................................................................................. 14

Figure 9: View of tailrace area ....................................................................................................... 14

Figure 10: A view of Headworks staff quarter ................................................................................ 16

Figure 11: Progress on HRT inlet portal and explosive loading at Seti outlet portal ...................... 16

Figure 12: Progress work at Seti inlet portal and progress on Poku outlet portal .......................... 17

Figure 13: Progress on Poku inlet portal after blast and drilling work at HRT outlet portal ............ 17

Figure 14: View of shot Crete on tunnel and view of gabion work at surge shaft area .................. 17

Figure 15: Shot Crete work at surge shaft area and view of power house area ............................ 18

Figure 16: Field density test at U/s flood wall and 3 and view of slump test at Headworks ........... 18

Figure 17: View of muck disposal area nearby Seti portal and View of muck disposal area at

Headworks ..................................................................................................................................... 18

Figure 18: Displaying safety board and fencing at Arunodaya School boundary........................... 19

Figure 19: Visitors of this month (Executive Chairman of SHEPL) ................................................ 19

Figure 20: Form work at D/s flood wall Panel no.1 and Concreting work at D/s flood wall panel no.2

....................................................................................................................................................... 19

Figure 21: Rebar laying at U/s flood wall panel no.2 and progress on U/s flood wall panel no. 3 to 6

....................................................................................................................................................... 20

Figure 22: Progress work on U/s flood wall panel no.6 and progress work on U/s flood wall panel

no.9 ................................................................................................................................................ 20

Figure 23: Excavation of upstream apron slab and progress on U/s cutoff wall 1 ......................... 21

Figure 24: View of powerhouse camp Block E .............................................................................. 21



iii Sanima Hydro and Engineering (P.) Ltd.

Figure 25: View of powerhouse office block A and Power house kitchen block D ......................... 21

Figure 26: Rebar laying at tailrace panel no. (9, 10) and view of mechanical yard ........................ 22

List of Tables

Table 1: Equipment details of civil contractor at site ........................................................................ 3

Table 2: Details of construction material in stock ............................. Error! Bookmark not defined.

Table 3: Progress summary of downstream flood wall .................................................................... 6

Table 4: Progress summary of upstream flood wall ......................................................................... 6

Table 5: Work progress of tunnel ..................................................... Error! Bookmark not defined.



1 Sanima Hydro and Engineering (P.) Ltd.

1 PROJECT OVERVIEW AND INSTITUTIONAL ARRANGEMENT

Lower Likhu Hydropower Project (LLHP) was identified by Swet Ganga Hydropower & Construction Ltd. (SGHCL). The project is a Run of River (RoR) type with its Headworks located on the right bank of Likhu River at Sirise Village of Saipu VDC, about 175 m upstream from the confluence of Pokali and Likhu River. The entire project area (Headworks to Powerhouse) is located in Saipu and Bijulikot VDCs of Ramechhap and Okhaldhunga District, Janakpur and Sagarmatha Zone, Central Development Region of Nepal (State no. 3).Geographically, the project area is located between longitudes 86015’38” E to 86013’17” E and latitude 27025’50” N to 27022’47” N. Geologically, the project area belongs to the Lesser Himalayas.

The project utilizes 118 m Gross Head and Design Discharge of 29.75 m3/s resulting into an installed capacity of 28.1 MW. The Annual Energy generation to PPA signed with Power Trade Department of Nepal Electricity Authority (PTD, NEA) and finalized to be 170.84 GWh, where the dry season energy contributes 30.94 GWh and Wet Season Energy contributes139.89 GWh.

The general arrangement of the project comprises weir, intake, undersluice, gravel trap, approach culvert, settling basin, headrace pipe, headrace tunnel, kholsi crossing (syphon arrangement), penstock, powerhouse and tailrace on the right bank of Likhu River. The power will be evacuated through 23 km long, 132 kV transmission line to proposed new Khimti substation at Devitar.

The project’s headworks area is accessible via two different road route. One from Kathmandu-Dhulikhel-Charikot-Nayapul-Dhobi-Sirise (227 km) and another from Kathmandu-Dhulikhel-Khurkot-Manthali-Dbi-Sirise (170 km). Manthali Bazar is the nearest city which is about 35 km from the proposed headworks area.

Construction Management:

The Employer/Owner: Swet Ganga Hydropower & Construction Ltd. (SGHCL)

The Engineer/Consultant: Sanima Hydro and Engineering (P.) Ltd. (SHEPL)

The Contractor (Main Civil Works Construction): High Himalaya Hydro Bavari-Construction JV, Kathmandu, Nepal

The Contractor (Hydro-mechanical Works): Machhapuchhre Metal & Machinery Works (P.)Ltd.

The Contractor (Electro-mechanical Works): Under Progress

The Contractor (Transmission Line): Under Progress




2 KEY DATES

Grid connection agreement 12

Chaitra 2072 (25 March 2016)

Generation License issued by Department Electricity Development (DoED), Ministry of Energy (MoEn), Government of Nepal (GoN)

2

Baisakh 2073 (14 April 2016)

The license period of the project is from

28

Chaitra 2072 to 27

Chaitra 2107 B. S.

Power Purchase Agreement (PPA) with Nepal Electricity Authority (NEA)

14

Poush 2073 (29

Dec 2016)

Letter of Acceptance for civil works 7 February 2018

Financial Closure 22 February 2018

Contract of main Civil works 5 Chaitra 2074 (March 2018)

Contract of Hydro-mechanical 9th Poush 2075 (24 Dec 2018)

RCOD 1

December 2021

3 CONTRACT PACKAGES AND IMPLEMENTATION

Main civil construction works: Civil Contractor CONTRACT Package 1

Hydro-mechanical and Penstock: HM Contractor CONTRACT Package 2

Equipment (electromechanical): EM Supplier CONTRACT Package 3

Power evacuation Transmission: TL Contractor CONTRACT Package 4

Preparatory works, owner’s housing, socio-environmental: EmployerDirect

4 FINANCING

Equity: Promoters 25% of the total Project Cost

Debt: Consortium of Banks75% of the total Project Cost: Lead-Laxmi Bank Ltd,

Member Banks: Kumari Bank Ltd., HIDCL. Century Bank Ltd., and Prabhu Bank Ltd.




5 RESOURCES AT SITE

Employer:

Description Number

Assistant Resident Engineer 1

Assistant Manager (Environment) 1

Geologist 3

Civil Engineer 4

Electrical Engineer 1

Admin/Account 2

Sub-Engineer(Overseer) 3

Geometrics and Survey 3

Social and Environment 5

Office Assistant 3

Driver 3

Supervisor 8

Cook 2

Total: 39

Civil contractor:

Description Number

Project Manager 1

Construction Manager 1

Tunnel Manager 1

Engineer 12

Geologist 2

Overseer/Sub-overseer 4

Surveyor 4

Supervisor/Foreman 5

Lab Technician 3

Skilled Manpower 12

Unskilled Manpower(Including crusher) 40

Operator/Driver/Helper 25

Helpers 8

Mechanical/Electrical staff 16

Office/store/Purchase 15

Security guards 8

Cook 9

Peon (ktm) 1

Subtotal 167

Other Workers

Powerhouse rock crusher 6

Headworks and rock crusher 76

HRT inlet portal 20




Description Number

Poku area 28

HRT outlet and surge shaft 20

Seti portals 50

Total 337

Table 1: Equipment Details of Civil Contractor at Site

S.N

Equipment Name Number Location Condition

1 Generator 62.5KVA 2 HW Working

2 Generator 30KVA 1 Seti Camp Working

3 Generator 125KVA 2 Seti Camp& portal Working

4 Generator 25 KVA 1 Working

5 Generator 15KVA 1 Working

6 Excavator 7 HW /PH/ Poku area Working

7 Backhoe Loader (JCB) 2 HW Working

8 Dum Truck 7 HW Working

9 Truck 1 Working

10 Tractor 2 Working

11 Wheel loader 4 Working

12 Light vehicle 4 Working

13 Motor bike 5 Working

14 Concrete mixer(including lab) 7 H/W, Seti Working

15 Compressive strength test machine

1 Lab Working

16 Grouting pump 6 Working

17 Concrete pump 1 Working

18 Jackhammer 30 Working

19 Blower fan set 4 Working

20 Abrasive cutter 5 Working

21 Pusher leg 30 Working

22 Hand drilling machine 3 Working

23 Air compressor 6 Seti, H/W, outlet, Poku

Working

24 Vibrators 1 Working

25 Water pump 3” 1 HW Working

26 Water pump 1” 8 Working

27 Grinding machine(4”) 1 Working

28 Grinding machine(7”) 1 Working

29 Welding machine 9 Working

30 Ply cutter machine (8”/7”) 1 Working

31 Prism with tripod set 3 Working

32 Leveling staff (5m) 1 Working

33 Total station with tripod set 3 Working

34 Auto level with tripod set 3 Working

35 Shot Crete machine PZ5 6 Seti/Poku/ inlet/outlet

Working




S.N

Equipment Name Number Location Condition

36 Lubricator 43 Working

37 Diesel Tank 16000Ltr 3 Working

38 Muck loader on wheel base 2 1 working

39 Shotcrete Robot Jacon 1

40 Blower fan set 4 Seti inlet 1 working

41 Pull out test machine 1

42 Muck loader on wheel base 2

43 Transit mixer 4

44 Concrete Batching Plant 1 Headworks

Table 2: Details of Construction Material in Stock

Materials Unit Balance Qty

Diesel Ltrs 3429

Rebar (25mm) Ton 0

Rebar (20mm) Ton 10

Rebar (16mm) Ton 72

Rebar (12mm) Ton 52

Rebar (10mm) Ton 0

Cement Bags 2889

Micro silica Kg 1805

Steel Fiber Kg 1353

Accelerator liquid Kg 1062

Tam Shot 80AF Kg 960

Plasticizer Kg 3625

Rock bolt 20mm*2m Nos. 247



Rock bolt plate 8*180*180 Nos. Nil

Steel rib Set 54

Sank rod 5’ Nos. 17






Wire mesh 100*100*4mm Roll 0

6. CIVIL CONSTRUCTION WORK PROGRESS

6. 1 HEADWORKS

Excavation for downstream flood wall has been completed.




The blinding concrete work (C15) for downstream flood wall has been

completed.

C25 concrete work on base slab and wall kicker of downstream flood wall panel

no. 1, 2, 5 and 6 to 15 has been completed.

The C25 concrete work of downstream flood wall panel no. (6 to 13) has been

completed up to level 735.30m.

The excavation works for upstream flood wall has been completed.

The blinding concrete work (C15) of upstream flood wall has been completed.

The C25 concrete work on base slab and all kicker of upstream flood wall panel

no. 3 to 5 has been completed.

The upstream flood wall panel no. 6 to 9 has been completed.

The excavation for the undersluice portion & cutoff wall is going on.

Table 3: Progress summary of downstream flood wall

S.N Description Units Previous month This month Total Quantity

1 C15 concrete m3 68.72 16.561 85.281

2 C25 concrete m3 1084.754 434.895 1519.649

3 Re-bar ton 93 28.031 121.031

Table 4: Progress summary of upstream flood wall

S.N Description Units Previous month This month Total Quantity

1 C15 concrete m3 48.512 12.825 61.337

2 C25 concrete m3 690.104 457.508 1147.612

3 Re-bar ton 42 46.341 88.341

Figure 1: A View of downstream flood wall




6. 2 TUNNEL

6.2.1. HRT INLET PORTAL

The total excavated length from Face 1 (main inlet portal) is 114.5 m. The geology of the tunnel

comprises of thinly foliated, dark grey to bluish grey color, slightly weathered to fresh, undulated

phyllite with partings and subordinates of quartzite and metasand stones. Clay coatings are

present along discontinuities. The class of rock is support type V.

Trend Analysis of Main Inlet Tunnel

Figure 2: A view of HRT inlet portal

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Main inlet (Face 1)

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6.2.2. SETI OUTLET PORTAL

The total excavation from face 2 (Seti outlet portal) is 200.2 m. The geology of the tunnel

comprises of thinly foliated, grey to greyish black colour, slightly weathered to fresh phyllite with

partings of quartzite and metasand stones. Lenses of quartzite are present, and clay coatings

along discontinuities. The class of rock is support type IV.

Trend Analysis of Seti Outlet Tunnel

Figure 3: A view of Seti outlet portal

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6.2.3. SETI INLETLET PORTAL

The total excavation from Face 3 is 264.0 m. The geology of the tunnel comprises of thinly to

thickly foliated phyllite with inter beds of thick bedded light to yellowish grey quartzite and grey

to bluish grey, metasand stone. The rock is fresh to moderately weathered with clay coatings

along discontinuities. The class of rock is support type III.

Trend Analysis of Seti Inlet Tunnel

Figure 4: A view of Seti inlet portal

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6.2.4. POKU OUTLET PORTAL

The total excavation from Face 4 is 143.2 m. The geology of the tunnel comprises inter beds of

thickly foliated medium grain metasand stone with thinly foliated bluish grey phyllite.The rock is

fresh to slightly weathered, bluish grey colour with clay coatings along discontinuities. The class

of rock is support type III.

Trend Analysis of Poku Outlet Tunnel

`

Figure 5: A view of Poku outlet

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6.2.5. POKU INLETLET PORTAL

Total excavation from Face 5 (Poku inlet) is 223.77 m. The general geology of the tunnel comprises of thickly to thinly foliated, fresh to slightly weathered light grey meta-sandstone with partings and inter beds of phyllite with clay coating along discontinuities. The class of rock is support type IV.

Trend Analysis of Poku Inlet Tunnel

Figure 6: A view of Poku Inlet portal

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2019 Jan Feb March April

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Poku inlet (Face 5)

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6.2.6. HRT OUTLET PORTAL

Total excavation from face 6 (Main outlet) is 203.7. The general geology of the tunnel comprises

of thin to thick foliations of greenish grey metasand stone with partings and inter-beddings of

greenish grey phyllite, and clay coatings along discontinuities. The class of rock is support type

III.

Trend Analysis of Poku Outlet Tunnel

Figure 7: A view of HRT outlet portal

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Poku outlet (Face 6)

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Table 5: Work Progress of Tunnel

Faces Length of tunnel(m) Progress(m) Total %

Inlet portal 911.5 114.5 9.874

Seti outlet 11.5 200.2 16.237

Seti inlet 609.5 264 34.372

Poku outlet 609.5 143.2 15.505

Poku inlet 878 223.77 18.736

Outlet portal 877 203.7 16.235

Total 4797 1149.37 23.96

7. SURGE SHAFT

Excavation at surge shaft has been started to reach the top level of the shaft by excavator.

Connecting tunnel to surge shaft centre point has been completed. Supporting works at the

uphill side of the surge shaft is ongoing.

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Inlet portal Seti outlet Seti inlet Poku outlet Poku inlet Outlet portal

Length of tunnel(m) Progress(m)

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Progress Detail of Tunnel

Faces




Figure 8: View of surge shaft area

8. TAILRACE

Excavation works has been completed from chainage 0+00 to 0+150.

Blinding work (C15) of panel no. 9 to 10 has been completed.

Rebar laying work is ongoing in panel no.9 and 10.

9. SOCIAL AND ENVIRONMENT

Swet Ganga Hydropower & Construction Limited has been co-ordinating with local stake holders and representative from elected bodies continuously to run the construction activities smoothly.

As per the request from local community, and as a part of environmental and social works the following activities have been commenced at site:

Figure 9: View of tailrace area




Upgrading and maintenance of road from Leti to Pokalli ward office for ward no 9 of

Likhu Rural Municipality, Okhaldhunga disrict.

Upgrading and maintenance of road from Khalte to Gamnangtar for ward no 6 of

Likhu Rural Municipality OKhaldhunga district.

Upgrading and maintenance of Tilak Chautari at Ratamata.

Stone masonry works of foot-trail has been completed at surge shaft area road-at

Ratamata.

On request of local muck disposal filling at low land which uplifted the low land up to

the level of road and helped the local people for housing propose at Sirise.

Maintenance of irrigation canal by providing the 225 mm dia. heavy HDPE pipe at

Poku Besi.

Water spraying on road to prevent the dust from Arunodhaya School, Headworks

area to Powerouse area (Ratamata) along with Poku Dada.

Fencing around Arunodaya School by using CGI sheets for preventing noise from

construction area to the school.

Maintenance of the headrace canal of micro-hydropower project near Powerhouse at

Ratamata is going on.

Stair constructed at Gaiyasori Adharbhut School at powerhouse for easy moment to

school children.

Maintenance and repair of Tilak chautari at powerhouse.

Stone masonry foot-trail has been completed at seti for easy access to local people.

10. EQUIPMENT BREAKDOWN

11. VISITORS OF THE MONTH

Consultant (SHEPL) team visited the site on 28th April.

12. NOTES:

Gabion work is going on at surge shaft area to dispose the excavated material.

Stone masonry works for shear key (u/s flood wall) of panel no.1 to 5 has been

completed.

The civil works of Powerhouse camp Block E is almost completed.

Construction of Powerhouse camp Block A is going on.

Construction of Powerhouse camp Block D is going on.

11 kVA construction power extension between powerhouse and Sangutar has been

started.

18 electric pole (11kVA) has been erected from powerhouse to Okhaldhunga.

Regular cube test of concrete and Shotcrete is going on at site Laboratory.




The production of construction material at headworks crusher plant and powerhouse

crusher plant is going on.

In tree cutting work is going on at penstock alignment.

Construction of foot rail has been completed at surge shaft area.

First lot of steel plates for penstock pipe has been arrived at site.

13. ACCIDENT

Death causality occurred in this month. One of the labour of contractor went missing while swimming in Likhu River on 28 April, 2019. His dead body was found after two days on 30 April, 2019. After police verification and due procedure the body was hand over to the relative.

14. PHOTOS

Figure 10: A view of Headworks staff quarter

Figure 11: Progress on HRT inlet portal and explosive loading at Seti outlet portal




Figure 13: Progress on Poku inlet portal after blast and drilling work at HRT outlet portal

Figure 14: View of shot Crete on tunnel and view of gabion work at surge shaft area

Figure 12: Progress work at Seti inlet portal and progress on Poku outlet portal




Figure 15: Shot Crete work at surge shaft area and view of power house area

Figure 16: Field density test at U/s flood wall and 3 and view of slump test at Headworks

Figure 17: View of muck disposal area nearby Seti portal and View of muck disposal area at Headworks




Figure 18: Displaying safety board and fencing at Arunodaya School boundary

Figure 19: Visitors of this month (Executive Chairman of SHEPL)

Figure 20: Form work at D/s flood wall Panel no.1 and Concreting work at D/s flood wall panel no.2




Figure 21: Rebar laying at U/s flood wall panel no.2 and progress on U/s flood wall panel no. 3 to 6

Figure 22: Progress work on U/s flood wall panel no.6 and progress work on U/s flood wall panel no.9




Figure 23: Excavation of upstream apron slab and progress on U/s cutoff wall 1

Figure 24: View of powerhouse camp Block E

Figure 25: View of powerhouse office block A and Power house kitchen block D




Figure 26: Rebar laying at tailrace panel no. (9, 10) and view of mechanical yard

15. PROGRESS CHART

0%

10%

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100%

Pe

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Overall Progress chart of Project

Percentage of work

lower likhu hydropower project (28.1mw)swetgangahydropower.com/uploads/downloads/progress...

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