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.) LIMITED.

Shankha Park, Dhumbarahi, Kathmandu M.C, Ward no.: 04, Nepal

G. P.O. Box. 19737, Kathmandu, Nepal

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

Email: [email protected], Web: www.sanimaengineering.com

LOWER LIKHU HYDROPOWER PROJECT (28.1MW)

MONTHLY PROGRESS REPORT # 22

FEBRUARY, 2020

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

SANIMA HYDRO AND ENGINEERING (P.) LIMITED.

Shankha Park, Dhumbarahi, Kathmandu M.C, Ward no.: 04, Nepal

G. P.O. Box. 19737, Kathmandu, Nepal

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

Email: [email protected], Web: www.sanimaengineering.com

LOWER LIKHU HYDROPOWER PROJECT (28.1 MW)

MONTHLY PROGRESS REPORT # 22

FEBRUARY, 2020

Rev: _________________________________________________________________

Prepared By:

Signature Date

Aashish Dhakal

Checked By:

Sudip Chapagain

Recommended By:

Bhojraj Paudel

Approved By:

Dr.Subarna Das Shrestha

Lower Likhu Hydropower Project (28.1 MW) Monthly Progress Report, February 2020

i Sanima Hydro and Engineering Pvt. Ltd.

Table of Contents 1. PROJECT OVERVIEW AND INSTITUTIONAL ARRANGEMENT ............................... 1

2. KEY DATES .................................................................................................................. 1

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

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

5. RESOURCES AT SITE ................................................................................................. 2

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

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

6.2 TUNNEL ................................................................................................................................ 9

6.2.1.HRT INLET PORTAL ......................................................................................................... 9

6.2.2.SETI OUTLET PORTAL ................................................................................................... 10

6.2.3. SETI INLET-POKU OUTLET SECTION .......................................................................... 11

6.2.5. POKU INLET PORTAL .................................................................................................... 12

6.2.6. HRT OUTLET PORTAL .................................................................................................. 13

6.3. SURGE SHAFT AND CONNECTING TUNNEL ................................................................ 14

6.4. PENSTOCK ........................................................................................................................ 15

6.5. POWERHOUSE ................................................................................................................. 17

6.6. TAILRACE .......................................................................................................................... 18

7. HYDRO-MECHANICAL WORKS PROGRESS .......................................................... 19

8. ELECTRO-MECHANICAL WORKS PROGRESS ...................................................... 21

9. CONSTRUCTION POWER ......................................................................................... 21

10. TRANSMISSION LINE WORKS (132 KV) ................................................................ 22

11. POWERHOUSE CAMP ............................................................................................ 22

12. SOCIAL AND PUBLIC .............................................................................................. 24

13. ENVIRONMENT, HEALTH AND SAFETY ............................................................... 24

13.1. MAIN CIVIL CONTRACTROR ......................................................................................... 24

13.2. HYDRO-MECHANICAL CONTRACTOR ......................................................................... 25

13.3. TEST RESULTS ............................................................................................................... 25

13.4. TRAINING AND INDUCTION ........................................................................................... 26

14. VISITORS OF THE MONTH ..................................................................................... 27

15. PHOTOS ................................................................................................................... 27

16. PROGRESS CHART ................................................................................................ 31

List of Figures


ii Sanima Hydro and Engineering Pvt. Ltd.

Figure 1: Construction of Weir ......................................................................................................... 7

Figure 2: Red Clay blanket at portion between cut-off walls ............................................................ 7

Figure 3: Arial view of Headworks ................................................................................................... 8

Figure 4: Construction activities in the stilling basin ......................................................................... 8

Figure 5: Tunnel from Face-01 (Main inlet portal) ............................................................................ 9

Figure 6: Grouting for rock bolt at Face-02 (Seti Outlet portal) ...................................................... 10

Figure 7: Concrete lining at Seti Inlet-Poku Outlet Section after breakthrough .............................. 11

Figure 8: Tunnel from Face-05 (Poku inlet portal) ......................................................................... 12

Figure 9: Tunnel from Face-06 (Main outlet portal) ........................................................................ 13

Figure 10: Surge shaft from top ..................................................................................................... 15

Figure 11: Penstock alignment below irrigation canal .................................................................... 16

Figure 12: Construction activities at Wye block and Powerhouse foundation ................................ 16

Figure 13: Progress at Powerhouse .............................................................................................. 17

Figure 14: Soil permeability test at Powerhouse ............................................................................ 18

Figure 15: Tailrace after backfilling ................................................................................................ 19

Figure 16: Rolling of Pipes at HM workshop .................................................................................. 20

Figure 17: Cutting of pipes at Workshop ........................................................................................ 20

Figure 18: Drainage pipe DN 150 at Powerhouse Bay 01 ............................................................. 21

Figure 19: 300 KVA transformer at Powerhouse ........................................................................... 22

Figure 20: Construction of Block H at Powerhouse camp ............................................................. 23

Figure 21: Construction of new store building at powerhouse camp ............................................. 23

Figure 22: Stone masonry for stair and protection purpose at Ratmata near surge shaft ............. 24

Figure 23: Induction to new workers .............................................................................................. 26

Figure 25: Approach Culvert at Headworks and Red clay for blanket between cutoff walls

(Right) ............................................................................................................................................ 27

Figure 27: Fabrication of Draft tube at Factory in China (left) steel works at HM workshop (right) 28

Figure 26: Undersluice after river diversion (left) and fabrication of bend pipe (right) .................... 27

Figure 28: Drainage pipe at Bay 01of Powerhouse (left) and Diamond bit for geotechnical

investigation (right) ......................................................................................................................... 28

Figure 29: Drinking water well at Powerhouse (left) and dewatering pit (right) .............................. 28

Figure 30: Concrete lining in the tunnel ......................................................................................... 29

Figure 31: Surge shaft ................................................................................................................... 29

Figure 32: Workers in the tunnel (Left) Inspection at Powerhouse (Right) .................................... 29

Figure 33: Staff quarter at powerhouse (Left) face-washing before shotcreting in tunnel (Right) .. 30

Figure 34: Reinforcement installation at Powerhouse (Left) and top view of Powerhouse (Right) 30

Figure 35: Drilling platform for tunnel (left) and Safety Briefing at surge shaft (right) .................... 30

file:///D:/Aashish/Lower%20Likhu%20Hydropower%20Project/Progress%20Reports/001_LLHP%20Progress%20Report%20Feb%202020.docx%23_Toc35091208file:///D:/Aashish/Lower%20Likhu%20Hydropower%20Project/Progress%20Reports/001_LLHP%20Progress%20Report%20Feb%202020.docx%23_Toc35091211


iii Sanima Hydro and Engineering Pvt. Ltd.

List of Tables

Table 1: Human Resource at site from the Employer’s side ............................................................ 2

Table 2: Human Resource at site from Civil Contractor’s side ......................................................... 3

Table 3: Human Resource at site from Hydro-Mechanical Contractor’s side .................................. 3

Table 4: Equipment mobilized by civil contractor at site .................................................................. 4

Table 5: Equipment mobilized by Hydro-Mechanical contractor ...................................................... 4

Table 6: Construction material stored by Civil contractor ................................................................. 5

Table 7: Construction progress at Headworks ................................................................................. 6

Table 8: Overall Tunnel Excavation Progress ................................................................................ 14

Table 9: Detail of concrete quantity at tailrace ............................................................................... 18

Table 10: OSH implementation by Civil Contractor ....................................................................... 24

Table 11: OSH implementation by Hydro-Mechanical Contractor ................................................. 25

Table 12: Luminous intensity inside the tunnel .............................................................................. 25

Table 13: Oxygen level inside the tunnel ....................................................................................... 25

Table 14: Noise level inside the tunnel .......................................................................................... 26

Table 15: Training and induction .................................................................................................... 26

Swet Ganga Hydropower & Construction Limited Lower Likhu Hydropower Project (28.1 MW) Monthly Progress Report, February, 2020

1 Sanima Hydro and Engineering Pvt. Ltd.

1. PROJECT OVERVIEW AND INSTITUTIONAL ARRANGEMENT

Lower Likhu Hydropower Project (LLHP) is a run-of-river (RoR) hydropower project which utilizes Gross Head 118 m and Design Discharge of 29.75 m3/s resulting in to an installed capacity of 28.1 MW. The entire project area (Headworks to Powerhouse) is located in LikhuTamakoshi Rural Municipality (Saipu-2 and Bijulikot-4) of Ramechhap, Province no.3 of Nepal. Geographically, the project lies between Longitudes 86°15’38” E to 86°13’17” E and Latitudes 27°25’56” N to 27°22’47”N. Geologically, the project area belongs to the Lesser Himalayas.

The project’sheadworks area is accessible via two different road routes. One from Kathmandu-Dhulikhel-Charikot-Nayapul-Dhobi-Sirise (170 km) and another from Kathmandu-Dhulikhel-Khurkot-Manthali-Dhobi-Sirise (227 km). Manthali Bazar is the nearest city which is about 45 km from the proposed headworks area.

Construction Management:

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

b) The Engineer/ Consultant Sanima Hydro and Engineering PVT. Ltd. (SHEPL)

c) The Contractor High Himalaya Hydro-BavariConstruction J.V.

(Civil Construction Works)

d) The Contractor Machhapuchhre Metal & Machinery Works (P.)Ltd. (3MW) (Hydro-mechanical

Works) e) The Contractor Asia Pacific Power-Tech Co. Ltd., China

(Electro-mechanical Works)

f) The Contractor LOA provided to Aster Teleservices Nepal Pvt. Ltd

(Transmission-line Works)

2. KEY DATES

Description Date

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 (19 March 2018)

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

RCOD 1 December 2021

TL LOA issued 29 Mangsir 2076 (15 December 2019)

Electro-Mechanical Contract Award 18 Bhadra 2076 (4 September 2019)



3. CONTRACT PACKAGES AND IMPLEMENTATION

a) Main civil construction works Contract Package 1

b) Hydro-mechanical and Penstock Contract Package 2

c) Equipment (electromechanical) Contract Package 3

d) Power evacuation Transmission Contract Package 4

e) Pre-construction works, camp, facilities, social environment Direct by the Em-ployer

4. FINANCING

a) Equity Promoters 25% of the total Project Cost

b) Debt Consortium of Banks 75% of the total Project Cost (Lead Bank-Laxmi Bank Ltd, Member Banks: Kumari Bank Ltd., Hy-droelectricity Investment and Development Company Ltd. Century Commercial Bank Ltd., and Prabhu Bank Ltd.)

5. RESOURCES AT SITE

From Employer’s side:

Table 1: Human Resource at site from the Employer’s side

Description Number Description Number

Acting Resident Engineer 1 Assistant Sub Engineer(Sub Overseer)

7

Assistant Manager (Environment) 1 Social and Environment officer 2

Safety Co-ordinator 1 Social Mobilizer 3

Geologist 3 Office Assistant 2

Civil Engineer 5 Driver 4

Electrical Engineer 1 Supervisor 7

Geomatics Engineer 1 Cook 1

Mechanical Engineer 1

Admin/Account 3

Sub-Engineer(Overseer) 2

Surveyor 1 Total: 46



From Civil Contractor’s side:

Table 2: Human Resource at site from Civil Contractor’s side

Description Number

Project Manager 1

Construction Manager 1

Tunnel Manager 1

Plant Manager 1

Engineer 10

Geologist 3

Overseer/Sub-overseer 10

Surveyor 4

Supervisor 1

Lab Technician/Helper 5

Survey helper 4

Unskilled labours (Including crusher) 21

Operator/Driver 33

Foreman 3

Health Assistant/CMA 2

Mechanical/Electrical staff 36

Admin/Account/store/Purchase 28

Security guards 20

Office Assistant 1

Cook 9

Other Workers

Powerhouse 32

Headworks 157

HRT inlet portal 30

Poku area 41

HRT outlet and surge shaft 24

Seti portals 30

Total 545

From Hydro-Mechanical Contractor’s side:

Table 3: Human Resource at site from Hydro-Mechanical Contractor’s side

Description Number

Engineer 1

Supervisor 2

Foreman 1

Welder 5

Electrician 1

Fitter 5

Helper 7

Store in-charge 1

Hydra Operator 1

Total 24



Equipment mobilized by Civil Contractor at site

Table 4: Equipment mobilized by civil contractor at site

Equipment mobilized by Hydro-Mechanical Contractor at site

Table 5: Equipment mobilized by Hydro-Mechanical contractor

S.N Equipment Number

1 Hydraulic Crane 1

2 Rolling machine 1

3 Pug machine 1

4 Tractor 1

S.N Equipment Name Number S.N Equipment Name Num-ber

1 Generator 62.5KVA 2 26 Pusher leg 43

2 Generator 30KVA 1 27 Blaster (Exploder) 6

3 Generator 125KVA 1 28 Siren 6

4 Generator 25 KVA 1 29 Core Cutting machine 2

5 Generator 160 KVA 3 30 Hand drilling machine 3

6 Generator 250 KVA 3 31 Air compressor 9

7 Air Receiver tank 6 32 Vibrators 1

8 Ohm meter 6 33 Water pump 10” 2

9 Excavator 7 34 Water pump 12” 1

10 Dum Truck 9 35 Water Pump (1HP) 9

11 Transportation Truck 1 36 Grinding machine(4”) 6

12 Backhoe Loader (JCB) 3 37 Grinding machine(7”) 1

13 Wheeled loader 5 38 Welding machine(single/3-phase)

9

14 Tractor 10 39 Ply cutter machine (8”/7”) 1

15 Light vehicle 6 40 Prism with tripod set 5

16 Motor bike 7 41 Leveling staff (5m) 4

17 Concrete mixer(including lab) 10 42 Total station (Topcon GM-105) with tripod set

3

18 Grouting pump 6 43 Auto level with tripod set 3

19 Concrete pump 2 44 Shot Crete machine PZ5 6

20 Jackhammer 48 45 Compressive strength test machine

2

21 Blower fan set 6 43 Lubricator 43

22 Pull out test machine 1 47 Diesel Tank 16000Ltr 3

23 Shotcrete Robot (Jacon) 1 48 Muck loader on wheel base 2

24 Shotcrete Robot (Cifa) 1 49 Transit mixer 4

25 Concrete Batching Plant 1



Construction materials stored by Civil Contractor at site:

Table 6: Construction material stored by Civil contractor

Materials Unit Balance Qty

Diesel Litres 31,192.90

Rebar (25mm) Kg -

Rebar (20mm) Kg 23,396.60

Rebar (16mm) Kg 32,297.40

Rebar (12mm) Kg 28,209.50

Rebar (10mm) Kg -

Cement Bags 9,988.00

Micro silica Kg 5,589.00

Steel Fiber Kg 3725.00

Accelerator liquid Kg 8,350.00

Pneumatic Oil Litres 971.50

Plasticizer Kg 1,358.80

Rock bolt 20mm*2m Nos. 192.00



Steel rib Set 4.00

Sank rod 5’ Nos. 3.00






Button Bit 38mm Kg 177.00

Wire mesh 100*100*4mm Nos. 12.00

Hydro-seal 8'x4'x20mm nos. 61.00

Water BarMF119-250mm m 185.00




Resin Capsule Nos. 170.00

Sika Rep Micro Concrete Kg 1,220.00

Sika Chapdur Kg 1,370.00



6. CIVIL CONSTRUCTION WORK PROGRESS

6. 1 HEADWORKS

Construction of civil structures in the undersluice has been completed and second stage

river diversion has also been done.

Construction of weir panel no.1 and 2 up to level 735m has been completed.

Construction of panel no. 3 is completed up to the level of 732m.

Construction of stilling basin Bay 3 panel 1, 2 and 3 has been completed. Blinding has

been ongoing in Bay 4.

Construction of gravel flushing has been completed and backfilled and intake has been

completed up to the level of 741.20 m.

Construction of sediment flushing panel no.10 has been completed. Panel no.9 has been

completed up to 737m level.

The construction of settling basin panel no.7 and 8 has been completed up to the level of

737m.

Construction of left approach culvert panel no.2 and 3 has been completed. Rebar and

formwork installation has been going on in panel 1.

Construction of the right side approach culvert panel no. 4 has been completed. Rebar

and formwork installation has been going on in panel 1and 2.

Construction of temporary vehicle crossing adjacent to upstream floodwall panel no.8

has been completed.

Table 7: Construction progress at Headworks

S.N Description Units Till

January, 2020

February,2020 Total Quantity

1. C35 concrete m3 70.000 101.000 171.000

2. C15 concrete m3 525.295 89.943 615.238

3. C25 concrete m3 12,508.42 1,856.794 14,365.214

4. Re-bar ton 1,010.000 205.000 1,215.000

5. Stone

masonry(1:6) m3 2,027.935 41.000 2068.935



Figure 1: Construction of Weir

Figure 2: Red Clay blanket at portion between cut-off walls



Figure 3: Arial view of Headworks

Figure 4: Construction activities at the stilling basin



6.2 TUNNEL

6.2.1.HRT INLET PORTAL

The total excavated length from Face 1 (Main inlet portal) is 402.50m. The geology of the tunnel comprises of thinly foliated, dark grey to bluish grey colour, slightly weathered to fresh, undulated phyllite with partings and subordinates of quartzite and Meta-sandstones. Clay coatings are present along discontinuities. The class of rock is support type V.

Figure 5: Tunnel from Face-01 (Main inlet portal)

Progress Analysis of Main Inlet Tunnel

0

5

10

15

20

25

30

35

40

45

50

Pro

gre

ss in

me

ter

Progress in month

Main inlet (Face 1)Monthly progress (m)



6.2.2.SETI OUTLET PORTAL

The total excavation from Face 2 (Seti outlet portal) is 578.50m. The geology of the tunnel comprises of thinly foliated, grey to greyish black colour, slightly weathered to fresh phyllite with partings of quartzite and Meta-sandstones. Lenses of quartzite are present, and clay coatings along discontinu-ities. The class of rock is support type V.

Figure 6: Grouting for rock bolt at Face-02 (Seti Outlet portal)

Progress Analysis of Seti Outlet Tunnel

0

10

20

30

40

50

60

70

80

90

100

Pro

gre

ss in

pe

rce

nta

ge

Progress in month

Seti outlet (Face 2)Monthly progress (m)



6.2.3. SETI INLET-POKU OUTLET SECTION

The total excavation from Face 3 (Seti Inlet Portal) is 654.90m and that from Face 4 (Poku Outlet Portal) is 564.00m which has been completed on 16th December, 2019. 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, Meta-sandstone. The rock is fresh to moderately weathered with clay coatings along discontinuities. After the breakthrough of the portion between Seti inlet and Poku outlet, final shotcrete spraying has been going on and Lugeon test has been completed. Final Con-crete lining has been going on.

Figure 7: Concrete lining at Seti Inlet-Poku outlet section after breakthrough



6.2.5. POKU INLET PORTAL

Total excavation from Face 5 (Poku inlet Portal) is 840.50m. The general geology of the tunnel com-prises of thickly to thinly foliated, fresh to slightly weathered light grey meta-sandstone with partings and interbeds of phyllite with clay coating along discontinuities. The class of rock is support type III.

Figure 8: Tunnel from Face-05 (Poku inlet portal)

Progress Analysis of Poku Inlet Tunnel

0

20

40

60

80

100

120

Pro

gre

ss in

me

ter

Progress in month

Poku inlet (Face 5)Monthly progress (m)



6.2.6. HRT OUTLET PORTAL

Total excavation from Face 6 (Main outlet portal) is 739.60m. The general geology of the tunnel comprises of thin to thick foliations of greenish grey Meta-sandstone with partings and inter-beddings of greenish grey phyllite, and clay coatings along discontinuities. The class of rock is support type V.

Figure 9: Tunnel from Face-06 (Main outlet portal)

Progress Analysis of Main Outlet Tunnel

0

10

20

30

40

50

60

70

80

Pro

gre

ss in m

ete

r

Progress in month

Poku outlet (Face 6) Monthly progress (m)



Table 8: Overall Tunnel Excavation Progress

Face Length of tunnel (m)

Progress (m) Total (%)

Re-marks January,2020 February, 2020 Total

Inlet portal 892.81 367.10 35.40 402.50 45.08

Seti outlet 855.85 533.60 44.90 578.50 67.59

Seti inlet 654.90 654.90 0.00 654.90 100.00

Poku outlet 564.00 564.00 0.00 564.00 100.00

Poku inlet 900.00 768.80 71.70 840.50 93.39

Outlet portal 854.95 683.50 56.10 739.60 86.51

Total 4722.52 3571.90 208.10 3780.00 80.04

6.3. SURGE SHAFT AND CONNECTING TUNNEL

The excavation of surge shaft has been completed up to 14.60m from the top. 3 numbers of ISMB

rib rings have been installed around the shaft at 2m c/c spacing. The breakthrough of pilot hole was

achieved on 10th Magh, 2076. The excavation of connecting tunnel has been completed up to

0+035.0m chainage, in which the outer diameter of the surge shaft is encountered at 0+024.3m.

0.00

100.00

200.00

300.00

400.00

500.00

600.00

700.00

800.00

900.00

1000.00

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

Length of tunnel(m)

Progress(m)

Tun

ne

l Le

ngt

hin

m

ete

r

Progress Detail of Tunnel

Faces



Figure 10: Surge shaft from top

6.4. PENSTOCK

Surface preparation for foundation works of VB-02 has been completed.

Plum concrete has been completed up to two benches for installation of pipe at wye block.



Figure 11: Penstock alignment below irrigation canal

Figure 12: Construction activities at Wye block and Powerhouse foundation



6.5. POWERHOUSE

Reinforcement installation in bay 01 has been continued and is in the verge of comple-

tion. 42 tons of rebar have been installed till date.

Surface preparation works have been completed in bay 02 and is ready for reinforcement

installation.

Reinforcement has been installed up to the level of 620.33 in bay 03.

Figure 13: Progress at Powerhouse



Figure 14: Soil permeability test at Powerhouse

6.6. TAILRACE

Construction of tailrace culvert panel 2 to 10 has been completed.

Backfilling over tailrace has been completed.

Table 9: Detail of concrete quantity at tailrace

Description

Concrete(m3) Rebar(ton) Remarks

Till November December Total

Till October December Total

Tailrace culvert panel no. 3,4,6,7,8,9 and 10

1055 214 1269 134 19 153 No activities since January,2020



Figure 15: Tailrace after backfilling

7. HYDRO-MECHANICAL WORKS PROGRESS

109 pieces of pipes have been fitted in the HM workshop.

101 pieces of pipes have been welded.

The rolling of pipes for SK-CB01 has been completed and welding has been ongoing.

The rolling of pipes for SK-VB02 has been completed.

The rolling and fitting of pipes for SK-CB03 has been completed and welding has been ongoing.

The cutting of pipes for PK-CB01, PK-VB02 and PK-CB03 has been completed.

The cutting of penstock pipes for Anchor block VB-01 has been completed. Cutting for branch pipe CB-01 has been started.

The fabrication of forebay bell-mouth has been completed.



Figure 16: Rolling of Pipes at HM workshop

Figure 17: Cutting of pipes at Workshop



8. ELECTRO-MECHANICAL WORKS PROGRESS

Drainage pipe DN 150 has been installed in Bay-01 of Powerhouse.

Drainage pipe installation for sump pit has been ongoing.

Figure 18: Drainage pipe DN 150 at Powerhouse Bay 01

9. CONSTRUCTION POWER

NEA electricity has been made available at all working fonts and is in use.



Figure 19: 300 KVA transformer at Powerhouse

10. TRANSMISSION LINE WORKS (132 KV)

Cadastral map plotting for Angle point AP 00 to AP 26 has been completed.

11. POWERHOUSE CAMP

Construction of powerhouse camp block H has been completed up to roof band level.



Figure 20: Construction of Block H at Powerhouse camp

Figure 21: Construction of new store building at powerhouse camp



12. SOCIAL AND PUBLIC

Stone masonry works at Ratmata near surge shaft for slide protection and stair purpose

has been completed.

Drinking water supply at Poku Besi has been completed.

The maintenance of road from Pokubesi to Kalleri has been completed.

The public irrigation canal at Bokse Besi has been repaired.

Figure 22: Stone masonry for stair and protection purpose at Ratmata near surge shaft

13. ENVIRONMENT, HEALTH AND SAFETY

Several activities related to EHS have been undergoing at site. Spraying of water in the access road has been going on in daily basis for dust prevention with the tractor mounted tank of 5,500 litre capacity. The following safety related activities have been ongoing at site:

13.1. MAIN CIVIL CONTRACTROR

Table 10: OSH implementation by Civil Contractor

Particular Description Remarks

Compliance of PPE Workers have been provided with appropriate PPE. Use of PPE is mandatory at site and monitored.

On going



Extension of Blower duct

To maintain oxygen level in working face in tunnel, 60 m blower duct was extended.

Further extension to continue on advancing the tunnel.

Strengthening of surface

Tunnel base surface strengthening by placing cobbles and stone at HRT from Face1 & face2 has been continued

On going

Installation of electric blub

Electrical blubs are installed to maintain minimum 100 lux in all tunnel

On going

13.2. HYDRO-MECHANICAL CONTRACTOR

Table 11: OSH implementation by Hydro-Mechanical Contractor

Particular Description Remarks

PPE PPE compliance at Headworks and workshop Ongoing

Exhaust gas of DG Kept away from the working site of the Worker

Installation of electric blub

At all place where needed

Fire extinguisher At Workshop Area

Fencing - Ongoing

Installation of signage At Workshop Area

13.3. TEST RESULTS

Table 12: Luminous intensity inside the tunnel

S. No Location

Readings at drilling face (LUX)

Min. Light required, (LUX), Nepal

Readings inside tunnel (LUX)

Min. Light required, (LUX), Nepal

Status

1 Main Inlet(f1) 125 100 70 50 Normal

2 Set Outlet (f2) 120 100 80 50 Normal

3 Seti inlet(f3) 115 100 60 50 Normal

4 Poku Outlet (f4) 118 100 70 50 Normal

5 Poku inlet(f5) 124 100 60 50 Normal

6 Main Outlet(f6) 118 100 54 50 Normal

7 Pilot Hole 140 100 50 50 Normal

Table 13: Oxygen level inside the tunnel

S.N Location Oxygen level (%) Oxygen required (%, V/V) Status

1 Main Inlet(f1) 22.6 21 Normal

2 Set Outlet (f2) 21.8 21 Normal

3 Seti inlet(f3) Natural air circulation between Face 3 and 4

4 Poku Outlet (f4)

5 Poku inlet(f5) 21.4 21 Normal

6 Main Outlet(f6) 21.6 21 Normal



7 Surge shaft 22.4 21 Normal

Table 14: Noise level inside the tunnel

S.N Locations Measured Noise Level (dBA) Status

Drilling ON Drilling OFF

1 Main Inlet(f1) 88.4 66.4

Noise Level exceeds 85dBA during drilling

2 Set Outlet (f2) 86.6 64.5

3 Seti inlet(f3) Break through on 2076-08-30. 4 Poku Outlet (f4)

5 Poku inlet(f5) 90.4 70.4

6 Main Outlet(f6) 92.4 80.6

7 Surge Shaft 87.6 82.2

13.4. TRAINING AND INDUCTION

Table 15: Training and induction

S.N Description Number of person attending training Remarks

1 Safety Briefing HW: 235, F1:21,,f2&f3:32,,F4&F5:41,,F6:20, ,Surge shaft:21, PH:48= 418 Nos.

Ongoing

2 Induction training 14 Nos. (F2:1 Nos., f3:02, F4: 07 Nos. Head Works: 3, Seti camp: 1Nos.)

Figure 23: Induction to new workers



14. VISITORS OF THE MONTH

No visitors this month.

15. PHOTOS

Figure 24: Approach Culvert at Headworks (left) and Red clay for blanket between cutoff walls (right)

Figure 25: Undersluice after river diversion (left) and fabrication of bend pipe (right)



Figure 26: Fabrication of Draft tube at Factory in China (left) steel works at HM workshop (right)

Figure 27: Drainage pipe at Bay 01of Powerhouse (left) and Diamond bit for geotechnical investigation (right)

Figure 28: Drinking water well at Powerhouse (left) and dewatering pit (right)



Figure 29: Concrete lining in the tunnel

Figure 30: Surge shaft

Figure 31: Workers in the tunnel (left) Inspection at Powerhouse (right)



Figure 32: Staff quarter at powerhouse (left) face-washing before shotcreting in tunnel (right)

Figure 33: Reinforcement installation at Powerhouse (left) and top view of Powerhouse (right)

Figure 34: Drilling platform for tunnel (left) and Safety Briefing at surge shaft (right)



16. PROGRESS CHART

47

30

15 12

100

0

20

40

60

80

100

120

Civil works HydroMechanical

Works

ElectroMechanical

Works

TransmissionLine works

ConstructionPower Works

% o

f W

ork

Co

mp

lete

d

Work Description

Overall Progress of Project

LOWER LIKHU HYDROPOWER PROJECT (28.1MW)swetgangahydropower.com/uploads/downloads/Progress...

Documents

Transcript of LOWER LIKHU HYDROPOWER PROJECT (28.1MW)swetgangahydropower.com/uploads/downloads/Progress...