MANAKAMANA ENGINEERINGHYDROPOWER COMPANY(P) LTD.
GhatteKholaSmallHydropowerProject
Dolakha
CONSULTINGSERVICES AND
CONSTRUCTIONSUPERVISION
MONTHLYPROGRESSREPORT
March 2017
Submitted By:
TAC Hydro Engineers Pvt. Ltd.
Kupandole, Lalitpur
Tel No. +977 1 5522896
Fax No. +977 1 5522896
E-mail: [email protected]
Consulting Services and
Construction Supervision of Ghatte Khola SHP
2017
Progress Report March
TABLE OF CONTENT
TABLE OF CONTENT
i
LIST OF ANNEXES
ii
LIST OF ABBREVIATIONS
iii
SALIENT FEATURES OF THE PROJECT
iv
PROJECT LOCATION MAP
1
2
3
GENERAL
viii
1
1.1
Introduction
1
1.2
WorkNature
1
1.3
ReportSetup
2
PROJECTMANAGEMENT
2
2.1
OrganizationalSetup
2
2.2
ConstructionManagement
3
2.3
VisittotheWorkSite
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
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LIST OF ANNEXES
Annex–A
ListofpersonneloftheEmployer,theConsultantandtheContractor
Annex–B
ProgressSheets
Annex–C
DeviationsinTimeSchedule
Annex–D
MostImportantActivities:DelaysActivities
Annex–E
Photographs
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LIST OF ABBREVIATIONS
BOK
-
Bank of Kathmandu Limited
COD
‐
CommercialOperationDate
CMA
‐
ConstructionManagementAdvisor
DoED
‐
DepartmentofElectricityDevelopment
‐
DS
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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
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SALIENT FEATURES OF THE PROJECT
Project Location
:
MarbuVDC
ofDolakhaDistrict,CentralDevel
opmentRegion, Nepal
Longitude
:
27o46′25″Nto27o47′14″N
Latitude
:
86o17′00″Nto 86o18′35″N.
:
RORSmallHydro
DesignFlow
:
1.78 m3/s (Q40)
1:100yearsflood
:
90.70 m3/s
Type
:
Concretediversionweir
Type
Hydrology
Catchment Area (Intake Site) :
(Total) Average Flow :
30 km 2
3.20 m3/s
Weir
withcontrolledspillway
CrestElevation
:
1906.00 masl
CrestLength
:
15.00 m
Maximum Height
:
5.00 m (From Foundation)
Intake
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Type
:
OrificeIntake
InvertLevel
:
1904.5 masl
NormalWaterLevel
:
1906.00 masl
WidthxHeight
:
3.0 m x0.40 m
InvertLevel
:
1901.5 masl
NormalWaterLevel
:
1906.00 masl
WidthxHeight
:
2.0 m x2.5 m
Type
:
Dufour
Length
:
38.00 m
Width
:
3.00 m
Depth
:
4.20 m
Flushing
:
Simple headcutting (Inthemonsoon)
Undersluice
Desander
Water Conveyance System(Headrace Pipe)
Length
:
2085 m
Diameter
:
1.3 m
Thickness
:
6 mm
Surge Tank Dimensions
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Height
:
17 m
Diameter
:
3.5m
NormalWater Level
Hydro
:
1904.44 msl
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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
:
6 mm to
mThickness(Steel)
15 mmNumber ofAnchorBlocks
ManifoldLength
:
20
:
8.0
mDiameter (Internal)
:
0.64 m
Thickness(Steel)
:
15 mm
Powerhouse Type
:
Surface
Dimensions(LxBxH)
:
24.00
mx14.00 mGrossHead
:
345.20m
NetHead
:
338.47m
Installed Capacity(Q40)
:
5000
PowerFacilities
m
x10.00
KWAverage Annual EnergyOutput :
29.87GWhE
nergyOutput(DrySeason)
:
4.4
GWhEnergyOutput(Wet Season)
:
25.4
:
14.0 km (33 kV Single Circuit)
GWh
TransmissionLineandSustation
TransmissionLine
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Progress Report March
:
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
:
Rs. 87.63 Crore
Financial Indicators
Financial Cost
IDC
:
Rs. 6.13 Crore
IRR
:
13.84 %
Return on Equity
:
18.52 %
NPV
:
Rs. 24,705 thousand
Benefit Cost Ratio (B/C)
:
Debt Service Capacity Ratio
:
Payback Period - Simple
:
6.47 years
Payback Period - Discounted
:
10.81 years
1.33
1.62
Construction Period : 1.5 Years
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PROJECT LOCATION MAP
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Progress Report March
GENERAL
1.1 Introduction
GhatteKholaSmallHydroelectricProjectwithinstalledcapacityof5000kW,beingconstructedbyM
ANAKAMANAENGINEERINGHYDROPOWERCOMPANY(P)LTD.,isin the preliminary
phase
of
construction.ConstructionsiteofthisprojectisattheGhatteKhola,Marbu‐VDC,Dolakha,whichisat
ributaryofKhareRiver.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,theprojectislocatedinbetween86°17′00″Nto86°18′35″NLatitudesand27°46′25″
Nto27°47′14″NLongitudes.
Waterwillenterintothesystemthroughorificesideintakeontheleftbankoftheriver.Diversionweiris
ofnon‐regulatedtype,withOrificetypeintake&oneunder‐sluiceontheleftbank.Waterwillbecarried
tothe32m.longdoublechamberdesandingbasinthrough30mlongpowercanalhaving7m
long
spillway.Waterisconveyedthrougha2234mlongsteelheadracepipehaving1300mmdiameterand1
015mlongsteelpenstockpipe.Circular Steel Surge Tank of diameter 5m is used to regulate the
surge.
Therearetwonumbersofpeltont urbi nes eachofinstalledcapacity2500kW.A14.5kmlong33kVtra
nsmissionlinewillfeedgeneratedpowerfromthePowerhouse(switchyard)toSingatisubstation.
1.2 WorkNature
Constructionworkcomprisesof construction of access road to Headworks and Powerhouse,
civilworksatheadworks,headrace
alignment,penstockandpowerhousearea,fabricationanderectionofsteelpipeforheadraceandpenst
ockpipe,installationandcommissioningofelectromechanicalequipmentinpowerhouse,switchyar
dandSingatisubstation,erectionoftransmissionlineandotherrelatedworks.
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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).SingatiisconnectedtoCharik
ot(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,whichconsistsofanaccountofpreconstruction
and
constructionactivitiesofcivilstructures,hydromechanicalcomponents,electromechanicalequipm
ent,transmissionlineandprojectinfrastructurescarriedoutinthepastmonth,majorproblemsarisen,d
eviationsfromtheoriginalworkingscheduleandthecatch‐upplans,photographsofprogressesmadei
nthelastmonthsandotherrelevantdetails as per the activities being carried out.
ThisreportincludesthefollowingAnnexes:
ListofpersonneloftheEmployer,theConsultantandtheContractoraregiveninAnnex–
A.ProgressSheetsaregiveninAnnex–B.DeviationsinTimeScheduleispresentedinAnnex–
C.MostImportantActivities:DelayedActivitiesareshowninAnnex‐Dandphotographsarepresente
dinAnnex‐E.
2
PROJECTMANAGEMENT
2.1 OrganizationalSetup
ThisprojectisunderdirectsupervisionofCompany’sDirectors.TACHydroassiststheManage
mentbylookingafterallthetechnicalmattersoftheProject.Allotherissuesaredirectlytakenover
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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
gate
erection
and
willvisitsiteeverynowandthen.During
electromechanicalinstallationworks,
one
Mechanical
and
electricalengineeralong with supervisorshallbedeputedatsite.
2.3 VisittotheWorkSite
Projectofficials,Consultantsandbank’srepresentativesfrequentlyvisittheworksitetoapprisethems
elvesoflatestsituation.
3
PROJECT ENGINEERING
AnAgreementwassignedbetweenManakamanaandTACHydroforConstructionSupervisionand
management
ofsiteworksoftheProject.Aspertheprovisionsandscopeofconsultingservices,theConsultantmake
saconstantcontrolandmonitoringofContractor’sworkswithintheframeworkoftheTechnicalSpeci
ficationsandreportstimelytotheProject,withsuggestionsandrecommendationsforfurtheractions.
TheConsultantalsomakesobservationsofoverallprogressatsiteandchecksitagainstthetimeschedu
leoftheProject.TheConsultantalsoindicatesthoseactivitieswhicharelaggingandneedspecialattent
ionandeffortstocompletetheactivitiesinordertocatchuptheschedule.
3.1 MajorEngineeringActivities
Followingarethemajorprojectactivitiesintheperiodofthisreport:
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
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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.
ix.
SuggestionsandrecommendationsforImprovingthespeedofconstructionworks.
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
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).
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Progress Report March
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
CLAIMSANDVARIATIONS
Noissueofclaimsandvariationshasbeenarisensofar.
5
CONCLUSIONANDRECOMMENDATION
The report is concluded with following recommendations:
i.
Crusher plan will start to produce construction material from the mid of April.
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
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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.
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LIST OF PERSONNEL
EMPLOYER: Manakamana Engineering Hydropower Pvt. Ltd.
Name of Project staff deputed in the Project
S.N
Name
Designation
Staffs deputed at site / Frequent site visit
1
Managing Director
Tek Prasad Chaulagain
2
Tilak Aral
PRO / Management Officer
3
4
5
6
7
8
9
10
11
12
13
14
Staffs deputed at KTM office
1
2
3
4
5
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CONSULTANT: TAC Hydro Engineers Pvt. Ltd.
Name of staffs involved in Ghatte Khola SHP
S.N
Name
Designation
1 Prahlad Chaudhary
Technical Coordinator
2 DipeshThapa
Project Manager
3 Balkrishna Pangeni
Resident Engineer
4 Nagendra Chaudhary
Electrical Engineer
5 BishnuShiwakoti
Geologist
6 Ghanshyam Rana
Sub-Engineer
7 Chandra Thapa
Sub-Engineer / Surveyor
CONTRACTOR: Sakurapower/Biruwa/DivyajyotiJ.V.
Name of staffs involved in Ghatte Khola SHP
S.N Name
1 DipendraPoudel
2 Riken Gautam
3 DevendraPoudel
4 Gopal Gurung
5 AnjanAdhikari
6 Operator/Driver/Helper
7
8
9
Annex
Progress Report March
Remarks
Frequent visit to site
Frequent visit to site
Site Stationed
Frequent visit to site
Frequent visit to site
Site Stationed
Site Stationed
Site In-charge
Civil Engineer
Sub Engineer/ Surveyor
Senior Supervisor
Supervisor
6 Nos.
Equipment’s Mobilized by Contractor at Site
S.N Name
1 Excavator (PC 225, Doosan)
2 Breaker
3 Dumper (Tipper)
4 Bolero
5
6
7
8
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Annex B
Progress Report March 2017
PROGRESSSHEETNO.1
CivilConstructionWorks
Civil Construction Work Progress
March, 2017
SubProgress Progress
Foundation Bar Bending / Form Stone Masonary
Filling /
Components
Till Last Till This
Components
Sub-Components
Excavation Preparation Work / Concreating / Protection work Finishing Work
Progress
Month Month
A1. To Headworks
100%
100%
100%
A. Access Road
1.00%
2.00%
A2. To Power House
100%
100%
100%
B1. Weir
10%
0%
0%
0%
2.50%
B2. Undersluice and Intake
0%
0%
0%
0.00%
B. Headworks
0.00%
0.14%
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%
C. Headrace Alignment
0.33%
0.33%
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%
E. Penstock Alignment E2. Anchor Block
0.00%
0.00%
0%
0%
0%
0.00%
E3. Saddle Support
0%
0%
0%
0%
0.00%
F1. Power House
70%
0%
0%
7%
0%
18.20%
F. Power House
2.59%
3.77%
F2. Tailrace
0%
0%
0%
0%
0.00%
Overall Civil Progress
6.24%
This Months Progress
2.32%
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PROGRESSSHEETNO.2
HydromechanicalWorks
No construction works yet started
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PROGRESSSHEETNO.3
ElectromechanicalWork
No construction works yet started
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PROGRESSSHEETNO.4
TransmissionLineWorks
Survey of Transmission line route up to Bhorle.
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DEVIATIONSINTIMESCHEDULE
S.
No.
Year 2073
Description of Works
9
10
11
Year 2074
12
1
2
3
Start Date
4
Target
Date
Duration
Remarks
A : Mobilization
1. Site Mobilization
1.1 Construction of site camps & accessories
Completed
Partially mobilized at
construction
1.2 Mobilization of equipments
1.3 Establishment of Crusher Plant
1.4 Establishment of Labrotary and Stores
15
Falgun
1
Chaitra
15
chaitra: 73
30
Chaitra: 73
25
Falgun
30
Falgun:73
1
Chaitra
15
Chaitra
15
Chaitra:73
30
Chaitra:73
30
continued
30
2. Access Road
2.1 Access from existing road to Power House
Opening of Track upto Headworks from river
2.2
crossings
Completed
5
Completed
B. Headworks
1. Structural Works (Undersluice + Weir + Intake)
Weir + Undersluice (Surface Excavation) and
1.1
river diversion
Foundation Excavation (clearance of rock and
1.2
boulder)
2. Structural Works (Desander , Approach Canal & Headpond)
2.1 Foundation Excavation
2.2 Bed concreting (3nos panel)
2.3 Construction of baffle wall
2.4 Protection works (nearby big boulder)
15
20
Chaitra Chaitra: 73
1
30
Jestha
Jestha:74
1
Asar
1
15
Baishak Jestha:74
15
15
5
30
60
During monsoon
season
45
C. Headrace Alignment / Penstock
Alignment
1. Excavation Works
Headrace (0+450m chainage upto 1+000m
1.1
chainage)
1.2 Headrace (Bell mouth upto 0+450m chainage)
Headrace (1+200m chainage upto 1+800m
chainage)
Penstock Alignment : Site camp to Power
1.4
house
2. Primary Anchor Block & Saddle supports
Headrace (0+450m chainage upto 1+000m
2.1
chainage)
1.3
2.2 Headrace (Bell mouth upto 0+450m chainage)
1
30
Baishak Baishak: 74
15
30
chaitra
Jestha:74
1
30
Baishak ashar:74
15
30
chaitra chaitra;73
15
baishak
1
jestha
30
ashar:74
30
ashar:74
30
75
90
Parallel excavation will
be done providing
150m to 250m working
front for HM
15
75
60
Parallel work will be
done providing 150m to
250m work front for
HM
3. Protection works & Backfillings works
Parallel ongoing works
3.1
D. Power House Areas
1. Excavation Works
1.1 Surface Excavation
1.2 Foundation Excavation
1
chaitra
30
Falgun: 73
15
chaitra:15
30
45
2. Structural Works
2.1 Substructural works upto plinth Lvl.
2.2 Superstructural work upto finishing lvl.
2.3 Protection Works
2.4 Drainage works
TAC Hydro Engineers Pvt. Ltd.
15
30
chaitra
jestha:30
1
30
Jestha Bhadra: 74
1
15
chaitra baishak:74
1
30
baishak baishak:74
75
During monsoon
season
60
45
30
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Annex
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MOSTIMPORTANTACTIVITIES:DELAYS ACTIVITIES
1. 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.
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2017
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Progress Report March
PHOTOGRAPHS
Figure 1 Breaker busy in breaking boulder as seen from uphill of power house area.
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Figure 2 Two excavators at work as seen from road on the right bank.
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Figure 3 Boulder of area about 150 m3 at Power house being broken by breaker.
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Figure 4 Dumping of excavated material at downstream of power house near crusher area.
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Figure 5 Protection work (Gabion work) at the left bank near power house.
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Figure 6 Earth resistance measurement at power house area.
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Figure 7 Welding of J hook for crusher installation.
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Figure 8 Unloading of main crusher block at crusher area.
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Figure 9 Construction of store room near crusher area.
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Figure 10 Maintenance of road on the way to Headworks from Power House.
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Figure 11 Site clearance and sorting of boulder for rip rap.
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Figure 12 Clients camp almost ready to move in.
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