· Web viewConsulting Services and Annex B. Construction Supervision of Ghatte Khola SHP. Progress...

MANAKAMANA ENGINEERINGHYDROPOWER COMPANY(P) LTD.

GhatteKholaSmallHydropowerProjectDolakha

CONSULTINGSERVICES AND

CONSTRUCTIONSUPERVISION

MONTHLYPROGRESSREPORT

March 2017

Submitted By:

TAC Hydro Engineers Pvt. Ltd.

Consulting Services and Construction Supervision of Ghatte Khola SHP Progress Report March 2017

TABLE OF CONTENTTABLE OF CONTENT i

LIST OF ANNEXES ii

LIST OF ABBREVIATIONS iii

SALIENT FEATURES OF THE PROJECT iv

PROJECT LOCATION MAP viii

1 GENERAL 1

1.1 Introduction 1

1.2 WorkNature 1

1.3 ReportSetup 2

2 PROJECTMANAGEMENT 2

2.1 OrganizationalSetup 2

2.2 ConstructionManagement 2

2.3 VisittotheWorkSite 3

3 PROJECT ENGINEERING 3

3.1 Major EngineeringActivities 3

3.2 Major Construction Activities 4

3.2.1 Civil Works 4

3.2.2 Hydromechanical Works 5

3.2.3 Electromechanical Works 5

3.2.4 Transmission Line Works 5

4 CLAIMSANDVARIATIONS 5

5 CONCLUSIONANDRECOMMENDATION 5

TAC Hydro Engineers Pvt. Ltd. i



LIST OF ANNEXESAnnex–A ListofpersonneloftheEmployer,theConsultantandtheContractor

Annex–B ProgressSheets

Annex–C DeviationsinTimeSchedule

Annex–D MostImportantActivities:DelaysActivities

Annex–E Photographs


ii


LIST OF ABBREVIATIONS

BOK

COD

-

‐Bank of Kathmandu Limited

CommercialOperationDate

CMA ‐ ConstructionManagementAdvisor

DoED ‐ DepartmentofElectricityDevelopmentDS ‐ Downstream

EM ‐ Electro‐mechanical

HW ‐ Headwork

HM ‐ Hydro‐mechanical

HR ‐ Headrace

NEA ‐ NepalElectricityAuthority

PC ‐ Penstock

PH ‐ Powerhouse

PPA ‐ PowerPurchaseAgreement

JV ‐ JointVenture

RCOD ‐ RequiredCommercialOperationDate

SHEP ‐ SmallHydroelectricProject

SS ‐ Substation

TACHydro ‐ TACHydroEngineersPvt.Ltd.

TR ‐ Tailrace

TL ‐ TransmissionLine

US ‐ Upstream

VCB ‐ VacuumCircuitBreaker


iii


SALIENT FEATURES OF THE PROJECTProject Location : MarbuVDC

ofDolakh

aDistrict,CentralDevelopmentRe

gion, Nepal

Longitude : 27o46′25″Nto27o47′14″N

Latitude : 86o17′00″Nto 86o18′35″N.

Type : RORSmallHydro

Hydrology

Catchment Area (Intake Site) : 30 km 2

(Total) Average Flow : 3.20 m3/s

DesignFlow : 1.78 m3/s (Q40)

1:100yearsflood : 90.70 m3/s

Weir

Type : Concretediversionweir

withcontrolledspillway

CrestElevation : 1906.00 masl

CrestLength : 15.00 m

Maximum Height : 5.00 m (From Foundation)


iv


Intake

Type : OrificeIntake

InvertLevel : 1904.5 masl

NormalWaterLevel : 1906.00 masl

WidthxHeight : 3.0 m x0.40 m

Undersluice

InvertLevel : 1901.5 masl

NormalWaterLevel : 1906.00 masl

WidthxHeight : 2.0 m x2.5 m

Desander

Type : Dufour

Length : 38.00 m

Width : 3.00 m

Depth : 4.20 m

Flushing : Simple headcutting (Inthemonsoon)

Water Conveyance System(Headrace Pipe)

Length : 2085 m

Diameter : 1.3 m

Thickness : 6 mm

Surge Tank Dimensions

Height : 17 mTAC Hydro Engineers Pvt. Ltd.

v


Diameter : 3.5m

NormalWater Level : 1904.44 msl

StaticWater Level : 1906.44

mslMinimumDownsurgelevel : 1894.23

mslMaximum upsurge level : 1912.44

mslInvertLevel ofPenstockIntake: 1892.94 msl

Surface Penstock/ Manifold

PenstockLength : 1015. m

Diameter (Internal) : 0.90

mThickness(Steel) : 6 mm to

15 mmNumber ofAnchorBlocks : 20

ManifoldLength :

8.0

mDiameter (Internal) :

0.64 m

Thickness(Steel) : 15 mm

PowerFacilities

Powerhouse Type : Surface

Dimensions(LxBxH) : 24.00 m x10.00

mx14.00 mGrossHead : 345.20m

NetHead : 338.47m

Installed Capacity(Q40) : 5000

KWAverage Annual EnergyOutput :

29.87GWhEnergyOutput(DrySeason) :

4.4

GWhEnergyOutput(Wet Season) : 25.4

GWh


vi


TransmissionLineandSustation

TransmissionLine : 14.0 km (33 kV Single Circuit)

Sub station : Singati

Cost

Total Cost with Financing : Rs. 87.63 Crore

Loan Amount : Rs. 61.00 Crore

Promoter Equity : Rs. 26.63 Crore

Cost per MW : Rs. 17.53 Crore

Revenue per MW : Rs. 2.90 Crore

Financial Indicators

Financial Cost : Rs. 87.63 Crore

IDC : Rs. 6.13 Crore

IRR : 13.84 %

Return on Equity : 18.52 %

NPV : Rs. 24,705 thousand

Benefit Cost Ratio (B/C) : 1.33

Debt Service Capacity Ratio : 1.62

Payback Period - Simple : 6.47 years

Payback Period - Discounted : 10.81 years

Construction Period : 1.5 Years


vii


PROJECT LOCATION MAP


viii


1 GENERAL

1.1 Introduction

GhatteKholaSmallHydroelectricProjectwithinstalledcapacityof5000kW,beingconstructedbyM

ANAKAMANAENGINEERINGHYDROPOWERCOMPANY(P)LTD.,isin the preliminary

phase of construction.ConstructionsiteofthisprojectisattheGhatteKhola,Marbu‐VDC,Dolakha,whichisatributaryofKhareRiver.Thisisarun‐off‐riverscheme with orifice side

intake. The proposed headworks site is located on the left bank of Ghatte Khola about 100 m

downstream from the confluence of Thado Khola and Ghatte Khola at an elevation of 1906

masl in MarbuVDC-7. Similarly, the powerhouse site has been proposed on the left bank of

Ghatte Khola around 125m upstream of the confluence of Khare Khola and Ghatte Khola in

the same VDC at an elevation of about 1575 masl.

Geographically,theprojectislocatedinbetwee

n86°17′00″Nto86°18′35″NLatitudesand27°46′25″Nto27°47′14″NLongitudes.

Waterwillenterintothesystemthroughorificesideintakeontheleftbankoftheriver.Diversionweiris

ofnon‐regulatedtype,withOrificetypeintake&oneunder‐sluiceontheleftbank.Waterwillbecarriedt

othe32m.longdoublechamberdesandingbasinthrough30mlongpowercanalhaving7m long

spillway.Waterisconveyedthrougha2234mlongsteelheadracepipehaving1300mmdiameterand1

015mlongsteelpenstockpipe.Circular Steel Surge Tank of diameter 5m is used to regulate the

surge.

Therearetwonumbersofpelto

nturbineseachofinstalledcapacity2500kW.A14.5kmlong33kVtransmissionlinewillfeedgener

atedpowerfromthePowerhouse(switchyard)toSingatisubstation.

1.2 WorkNature

Constructionworkcomprisesof construction of access road to Headworks and Powerhouse,

civilworksatheadworks,headrace

alignment,penstockandpowerhousearea,fabricationanderectionofsteelpipeforheadraceandpenst

ockpipe,installationandcommissioningofelectromechanicalequipmentinpowerhouse,switchyar


1


dandSingatisubstation,erectionoftransmissionlineandotherrelatedworks.

Sakurapower/Biruwa/DivyajyotiJ.V. has been selected for the construction of all civil works.

Hydromechanical and electromechanical contractor are yet to be selected. Consulting and

construction supervision has been awarded to TAC Hydro Engineers Pvt. Ltd.

17km.ofMotorabletrackgoesfromSingatitoMarbu(Powerhousesite).Singatiisconnecte

dtoCharikot(DistrictHeadquater) by 47km. good gravel road. 450 m access road to

Powerhouse has been constructed to reach the Powerhouse and 500 m to reach Headworks

along Ghatte khola.Theoveralllengthoftrackopening for waterway alignment is around 2234

m.Atpresentfullloadedtruckcanreach to the Surge Tank area and opening of proposed access

road towards Headworks and Powerhouse.

1.3 ReportSetup

TACHydrowas responsible for carrying out the detailed design of the project. In addition, it

has been awarded the consulting services for the engineering supervision of all the

construction works going on at site including managerial activities at Kathmandu office.

ThisisMonthlyProgressReportforthemonthofMarch2017,whichconsistsofanaccountofpre-

construction and

constructionactivitiesofcivilstructures,hydromechanicalcomponents,electromechanicalequipm

ent,transmissionlineandprojectinfrastructurescarriedoutinthepastmonth,majorproblemsarisen,d

eviationsfromtheoriginalworkingscheduleandthecatch‐upplans,photographsofprogressesmadeinthelastmonthsandotherrelevantdetails as per the

activities being carried out.

ThisreportincludesthefollowingAnnexes:

ListofpersonneloftheEmployer,theConsultantandtheContractoraregiveninAnnex–

A.ProgressSheetsaregiveninAnnex–B.DeviationsinTimeScheduleispresentedinAnnex–

C.MostImportantActivities:DelayedActivitiesareshowninAnnex‐DandphotographsarepresentedinAnnex‐E.

2 PROJECTMANAGEMENT

2.1 OrganizationalSetup


2


ThisprojectisunderdirectsupervisionofCompany’sDirectors.TACHydroassiststheManage

mentbylookingafterallthetechnicalmattersoftheProject.Allotherissuesaredirectlytakenover

bytheManagement.

2.2 ConstructionManagement

OneofthedirectorsoftheCompanyisplannedtobestationed

atsite,sothatimmediatedecisionscanbemadewheneverneeded.Technicalmattersareallhandledbyt

heengineersdeputedatsitefrom the Consultant, TACHydro. There isoneCivilEngineerand two

CivilSub‐Engineers / surveyorstationedatsite. Considering work progress one more engineer

and two supervisors shall be deputed at site.Otherkindsofengineeringprofessionals wi l l

handlethetechnicalmattersfromKathmandu,andthey willvisitsiteeverynowandthen.During gate

erection and electromechanicalinstallationworks, one Mechanical and

electricalengineeralong with supervisorshallbedeputedatsite.

2.3 VisittotheWorkSite

Projectofficials,Consultantsandbank’srepresentativesfrequentlyvisittheworksitetoapprisethems

elvesoflatestsituation.

3 PROJECT ENGINEERINGAnAgreementwassignedbetweenManakamanaandTACHydroforConstructionSupervisionand

management

ofsiteworksoftheProject.Aspertheprovisionsandscopeofconsultingservices,theConsultantmake

saconstantcontrolandmonitoringofContractor’sworkswithintheframeworkoftheTechnicalSpeci

ficationsandreportstimelytotheProject,withsuggestionsandrecommendationsforfurtheractions.

TheConsultantalsomakesobservationsofoverallprogressatsiteandchecksitagainstthetimeschedu

leoftheProject.TheConsultantalsoindicatesthoseactivitieswhicharelaggingandneedspecialattent

ionandeffortstocompletetheactivitiesinordertocatchuptheschedule.

3.1 MajorEngineeringActivities

Followingarethemajorprojectactivitiesintheperiodofthisreport:


3


i. After few days rainfall, unexpected landslide occurred in the power house area.

Immediate site visit was made by Geologist and Senior Hydropower Engineer and

recommended to shift the power house to the best available location (i.e. 75 m

upstream of the landslide area ) considering long term safety of Power House.

ii. Power house design as per Electromical Requirement has been received from the EM

Supplier (Flovel India). After reviewing it by the consultant considering site condition

and structural requirement, Flovelindia has revised the drawings few times. The

supplier has provided the loading diagram and structural design from TAC Hydro is

ongoing.

iii. A team comprising of Mr. K B Uprety (Client, Chairperson) , Mr. BigyanGhimire

(BOK Lumbini), Mr. Prahlad Chaudhary (Consultant, Project Coordinator) and Mr.

UjjwalPrajuli (Consultant, Mechanical Engineer ) had made a visit to pipe

manufacturer, China. Manufacturing of Spirally Welded Pipe is ongoing. Mr.

UjjwalPrajuli has been deputed in the factory to inspect and maintain the quality

control. He will be back once the manufacturing and quality check of SW pipe

completes.

iv. Bids for fabrication of gates and installation of all hydro mechanical componentshas

been received and opened. Bidder have been sort listed and shall be called for

negotiation.

v. Inspection, measurement and quality control of civil construction works (construction

materials, excavation, bar bending schedule, concreting etc.)

vi. Internal Discussionandplanningofconstructionworks.

vii. Discussion and planning of construction works with the contractor for the full

mobilization of human resource.

viii. SuggestionsandrecommendationsforImprovingthespeedofconstructionworks.

ix. Discussion and carrying out all other day to day engineering matters like attending

meetings regarding project with Banks, DOED, NEA as required by Clients.

3.2 Major Construction Activities

3.2.1 Civil Works


4


i. About 70% (7150m3) of excavation work at new power house location has been

completedtill the preparation of this report. Out of the excavated material, 79%

material is Boulder mixed soil (BMS) and remaining 21% is rock (Boulder).(1510).

ii. Construction of access road (About 500 m stretch) to headworks area has been

completed.

iii. Site clearance and sorting of boulder for rip rap in weir area.

iv. Foundation preparation for river training works (Gabion wall) at the left bank near

power house area has been completed and about 80 m3 gabion has been constructed.

3.2.2 Hydromechanical Works

3.2.2.1 Procurement and Transportation of Spirally Welded Pipe

SW Pipe is being manufactured in china. Mr. UjjwalParajuli (Mechanical

Engineer),consultant’s representative is at factory for quality control.

3.2.2.2 Fabrication and Installation of Gates and Pipes

Bids for the above-mentioned work has been received and opened. Bidders shall be

called for negotiation soon.

3.2.3 Electromechanical Works

Flovel India is manufacturing Electromechanical equipment’s. Drawings have been

revised few times considering site and structural requirement. Detail design of power

house is ongoing.

3.2.4 Transmission Line Works

Survey work for transmission route from Power House to Bhorle bridge is completed.

Remaining survey work from Bhorle to Singati Sub station is planned to continue

from mid of April.

4 CLAIMSANDVARIATIONSNoissueofclaimsandvariationshasbeenarisensofar.

5 CONCLUSIONANDRECOMMENDATIONThe report is concluded with following recommendations:

i. Crusher plan will start to produce construction material from the mid of April.


5


ii. Site has been closed time and again due to disturbance of local people regarding work.

After multiplenegotiation with the local people interested in construction activities,

understanding has been made to provide them work considering their capability and

start work at headworks area and written consent was made for no further disturbance.

iii. It was planned to construct weir before this monsoon. However,due to disturbance

from local people of Headworks, excavation work at headworks has been delayed.As a

result, weir clearance and excavation work shall be carried out before this monsoon

and concreting work shall be done just after the monsoon.

iv. Excavation at power house is going on and shall be completed by the first week of

April if the underground soil condition is as expected.

v. Selection of cement and reinforcement after laboratory testing of their material

properties like compressive strength and tensile stress.

vi. Immediate Opening of LC for construction material purchase (Reinforcement and

Cement)

vii. It is recommended to select HM contractor immediately so that camp and workshop

can me made ready for the fabrication of bend and frames in the first stage.


6



7

Consulting Services and Annex A Construction Supervision of Ghatte Khola SHP Progress Report March 2017

LIST OF PERSONNEL

EMPLOYER: Manakamana Engineering Hydropower Pvt. Ltd.Name of Project staff deputed in the ProjectS.N

Name Designation

Staffs deputed at site / Frequent site visit1 Tek Prasad Chaulagain Managing Director2 Tilak Aral PRO / Management Officer3456789

1011121314

Staffs deputed at KTM office12345



CONSULTANT: TAC Hydro Engineers Pvt. Ltd.Name of staffs involved in Ghatte Khola SHP

S.N

Name Designation Remarks

1 Prahlad Chaudhary Technical Coordinator Frequent visit to site2 DipeshThapa Project Manager Frequent visit to site3 Balkrishna Pangeni Resident Engineer Site Stationed4 Nagendra Chaudhary Electrical Engineer Frequent visit to site5 BishnuShiwakoti Geologist Frequent visit to site6 Ghanshyam Rana Sub-Engineer Site Stationed7 Chandra Thapa Sub-Engineer / Surveyor Site Stationed

CONTRACTOR: Sakurapower/Biruwa/DivyajyotiJ.V.Name of staffs involved in Ghatte Khola SHP

S.N

Name

1 DipendraPoudel Site In-charge2 Riken Gautam Civil Engineer3 DevendraPoudel Sub Engineer/ Surveyor4 Gopal Gurung Senior Supervisor5 AnjanAdhikari Supervisor6 Operator/Driver/Helper 6 Nos.789

Equipment’s Mobilized by Contractor at SiteS.N

Name

1 Excavator (PC 225, Doosan) 32 Breaker 23 Dumper (Tipper) 14 Bolero 15


ii


6789


iii

Consulting Services and Annex BConstruction Supervision of Ghatte Khola SHP Progress Report March 2017

PROGRESSSHEET NO.1

CivilConstructionWorks


Components Sub-Components ExcavationFoundation Preparation

Bar Bending / Form Work / Concreating

Stone Masonary / Protection work

Filling / Finishing Work

Sub-Components

Progress

Progress Till Last Month

Progress Till This Month

A1. To Headworks 100% 100% 100%A2. To Power House 100% 100% 100%B1. Weir 10% 0% 0% 0% 2.50%B2. Undersluice and Intake 0% 0% 0% 0.00%B4. Approach Canal 0% 0% 0% 0% 0.00%B5. Settling Basin 0% 0% 0% 0.00%B6. Filling Work 0% 0.00%C1. Track and/or Trench 4% 0% 0% 2.22%C2. Anchor Block 0% 0% 0% 0.00%C3. Saddle Support 0% 0% 0% 0% 0.00%C3. Saddle Pad 0% 0% 0% 0.00%

D. Surge Tank D1. Surge Tank 0% 0% 0% 0% 0.00% 0.00% 0.00%E1. Track and/or Trench 0% 0% 0% 0.00%E2. Anchor Block 0% 0% 0% 0.00%E3. Saddle Support 0% 0% 0% 0% 0.00%F1. Power House 70% 0% 0% 7% 0% 18.20%F2. Tailrace 0% 0% 0% 0% 0.00%

6.24%2.32%

Civil Construction Work Progress

Overall Civil Progress

1.00%

0.00%

0.33%

0.00%

2.59%

March, 2017

C. Headrace Alignment

B. Headworks

A. Access Road 2.00%

0.14%

0.33%

F. Power House 3.77%

This Months Progress

E. Penstock Alignment 0.00%


PROGRESSSHEET NO.2

HydromechanicalWorks

No construction works yet started


ii


PROGRESSSHEET NO.3

ElectromechanicalWork

No construction works yet started


iii


PROGRESSSHEET NO.4

TransmissionLineWorks

Survey of Transmission line route up to Bhorle.


iv

Consulting Services and Annex CConstruction Supervision of Ghatte Khola SHP Progress Report March 2017

DEVIATIONSINTIMESCHEDULE

1. Site Mobilization

15 15Falgun chaitra: 73

1 30Chaitra Chaitra: 73

2. Access Road

25 30Falgun Falgun:73

1. Structural Works (Undersluice + Weir + Intake)1 15

Chaitra Chaitra:7315 30

Chaitra Chaitra:732. Structural Works (Desander , Approach Canal & Headpond)

15 20Chaitra Chaitra: 73

1 30Jestha Jestha:74

1Asar

1 15Baishak Jestha:74

1. Excavation Works1 30

Baishak Baishak: 7415 30

chaitra Jestha:741 30

Baishak ashar:7415 30

chaitra chaitra;732. Primary Anchor Block & Saddle supports

15 30baishak ashar:74

1 30jestha ashar:74

3. Protection works & Backfillings works

1. Excavation Works30

Falgun: 731 15

chaitra chaitra:152. Structural Works

15 30chaitra jestha:30

1 30Jestha Bhadra: 74

1 15chaitra baishak:74

1 30baishak baishak:74

2.1 Foundation Excavation 5

D. Power House Areas

1.2 Foundation Excavation

1.1Weir + Undersluice (Surface Excavation) and river diversion 15

1.2Foundation Excavation (clearance of rock and boulder) 15

1.1Headrace (0+450m chainage upto 1+000m chainage) 30

C. Headrace Alignment / Penstock Alignment


2.2 Bed concreting (3nos panel) 30

2.3 Construction of baffle wall 60During monsoon

season

2.4 Protection works (nearby big boulder)

Partially mobilized at construction

B. Headworks

2.1 Access from existing road to Power House Completed

2.2Opening of Track upto Headworks from river crossings 5 Completed

S. No.

Description of WorksYear 2073

Start Date Target Date9 10 11 12

Duration RemarksYear 2074

1 2 3

1.3 Establishment of Crusher Plant

4

A : Mobilization

45

Parallel excavation will be done providing

150m to 250m working front for HM

1.2 Headrace (Bell mouth upto 0+450m chainage) 75

30 continued

1.4 Establishment of Labrotary and Stores 30

1.1 Construction of site camps & accessories Completed

1.2 Mobilization of equipments

1.1 Surface Excavation 30

Parallel work will be done providing 150m to

250m work front for HM


1.4Penstock Alignment : Site camp to Power house 15

2.2 Headrace (Bell mouth upto 0+450m chainage) 60

2.4 Drainage works 30

2.3 Protection Works 45

Parallel ongoing works3.1

2.2 Superstructural work upto finishing lvl. 60

45

2.1 Substructural works upto plinth Lvl. 75During monsoon

season


Consulting Services and Annex DConstruction Supervision of Ghatte Khola SHP Progress Report March 2017

MOSTIMPORTANTACTIVITIES:DELAYS ACTIVITIES1. Excavation at headworks area has been delayed due to obstruction by local people.

The issue has been resolved. Site clearance and sorting of boulder for rip rap is going

on in full swing.

2. Crusher installation has been delayed due delay in sending welding manpower by the

crusher supplier. However, it will be start producing material by the mid of April

2017.


Consulting Services and Annex DConstruction Supervision of Ghatte Khola SHP Progress Report March 2017


ii

Consulting Services and Annex EConstruction Supervision of Ghatte Khola SHP Progress Report March 2017

PHOTOGRAPHS

Figure 1 Breaker busy in breaking boulder as seen from uphill of power house area.



Figure 2 Two excavators at work as seen from road on the right bank.


ii


Figure 3 Boulder of area about 150 m3 at Power house being broken by breaker.


iii


Figure 4 Dumping of excavated material at downstream of power house near crusher area.


iv


Figure 5 Protection work (Gabion work) at the left bank near power house.


v


Figure 6 Earth resistance measurement at power house area.


vi


Figure 7 Welding of J hook for crusher installation.


vii


Figure 8 Unloading of main crusher block at crusher area.


viii


Figure 9 Construction of store room near crusher area.


ix


Figure 10 Maintenance of road on the way to Headworks from Power House.


x


Figure 11 Site clearance and sorting of boulder for rip rap.


xi


Figure 12 Clients camp almost ready to move in.


xii

· Web viewConsulting Services and Annex B. Construction Supervision of Ghatte Khola SHP. Progress...

Documents

Transcript of · Web viewConsulting Services and Annex B. Construction Supervision of Ghatte Khola SHP. Progress...