Exploring the irrigation potential in peri -urban landscapes Olufunke Cofie &
Irrigation Potential in West Pokot
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Transcript of Irrigation Potential in West Pokot
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. i Progress Report-18 July 2013
TABLE CONTENTS
List of Abbreviations and Acronyms ....................................................................................... iv
CHAPTER ONE: EXECUTIVE SUMMARY....................................................................... 1-11.1 Project Background ........................................................................................................... 1-1
1.2 Contract Data .................................................................................................................... 1-1
1.3
Project Area ...................................................................................................................... 1-2
1.4 Project Data ...................................................................................................................... 1-2
1.5 Project Components .......................................................................................................... 1-2
1.6 Existing Irrigation Scheme ................................................................................................. 1-3
CHAPTER TWO: PROGRESS OF THE WORKS ............................................................... 2-12.1 General ............................................................................................................................. 2-1
2.2 Bill One: Preliminaries and General .................................................................................. 2-1
2.2.1 Programme of works.................................................................................................................. 2-1
2.2.2 Project Vehicle ........................................................................................................................... 2-1
2.2.3 Offices and Houses..................................................................................................................... 2-1
2.2.4 Weather Station......................................................................................................................... 2-1
2.2.5 Surveying and Survey Equipment............................................................................................... 2-1
2.2.6 Publicity Boards ......................................................................................................................... 2-12.2.7 Materials.................................................................................................................................... 2-1
2.2.8 Plant and Equipment.................................................................................................................. 2-2
2.2.9 Labour........................................................................................................................................ 2-2
2.3 Bill No.2: Intake Works ..................................................................................................... 2-2
2.4 Bill No.3: Sedimentation Tank ........................................................................................... 2-2
2.5 Bill No.4: Roads and Plot Demarcation, and Supply of Sand and Aggregates for Road
Drainage Works ............................................................................................................................. 2-2
2.6 Bill No.5: Combined Pipeline ............................................................................................. 2-3
2.7 Bill No.6: Main Pipeline A.................................................................................................. 2-3
2.8 Bill No.7: Main Pipeline B .................................................................................................. 2-3
2.9 Bill No.8: Ptokou Sub Mains & Bill No.9: Sangat Sub Mains .............................................. 2-32.10 Bill No.10: Field Hydrant and Sprinkler System for 0.5 Acre Irrigated Module .................. 2-3
2.11 Bill No.11: Field Hydrant and Sprinkler System for 0.25 Acre Irrigated Module ................ 2-3
2.12 Value of Work done .......................................................................................................... 2-4
2.13 Interim Payments .............................................................................................................. 2-5
2.14 Supervision Activities ........................................................................................................ 2-5
2.15 Contingency Works ........................................................................................................... 2-5
2.16 Constrains Encountered During the Period and Solutions ................................................. 2-5
CHAPTER THREE: SUPERVISION SERVICES ............................................................... 3-13.1 Site Supervision Staff ........................................................................................................ 3-1
3.1.1 Staff seconded by the Client....................................................................................................... 3-1
3.2
Consultants Head Office Support Staff: ............................................................................ 3-1
3.3 Contractors Staff .............................................................................................................. 3-1
3.4 Meetings ........................................................................................................................... 3-1
3.5 Visitors .............................................................................................................................. 3-1
3.6 Weather ............................................................................................................................ 3-1
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. ii Progress Report-18 July 2013
APPENDICES
Appendix A: Correspondences
Appendix B: Works Programme
Appendix C: Weather Charts
Appendix D: Site Instructions
Appendix E: Minutes
Appendix F: Progress Photos
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. iii Progress Report-18 July 2013
Scheme Layout
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. iv Progress Report-18 July 2013
List of Abbreviations and Acronyms
BOQ Bills of Quantities
DC District Commissioner
EIA Environmental Impact Assessment
ESP Economic Stimulus Programme
ET Evapo-transpiration rate
F/WUA Farmer/Water User Association
GDP Gross Domestic Product
GI Galvanized Iron
GIS Global Information System
GoK Government of Kenya
KES Kenya Shillings
KVDA Kerio Valley Development Authority
MD Managing Director
MOWI Ministry of Water and Irrigation
NGO Non Governmental Organisation
NEMA National Environment Management Authority
O&M Operation & Maintenance
PE Project Engineer
RE Resident Engineer
PVC Un-plasticed Polyvinyl Chloride
VIP Ventilated Improved Pit Latrine
WUAs Water Users Associations
WRMA Water Resources Management Authority
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 1-1 Progress Report July 2013
CHAPTER ONE: EXECUTIVE SUMMARY
1.1 Project BackgroundThe Government of Kenya through the implementing agency, Kerio Valley DevelopmentAuthority (KVDA),-herein referred to as the Client has earmarked funds through theEconomic Stimulus Programme for the Design, Supervision and Construction of Ptokou
and Sangat Irrigation Scheme. In order to effectively implement the project, the Clientprocured a Consultant M/s Norken (I) Ltd ofP.O Box 9882-00100 Nairobi to carry out
both the Design and Construction Supervision. With the assistance of the Consultant, theClient after tendering procured the services from ContractorM/s Toddy Merchants Ltd of
P.O Box 30382 -00100 Nairobi to carry out the Construction of the Project. The projectcommencement date was May 3rd2011.
1.2 Contract DataProject
Contract Number
Construction of Ptokou & Sangat Irrigation Projects
Financier GoK Economic Stimulus Package
Implementing Agency Kerio Valley Development Authority (KVDA)
Engineer Irrigation Engineer, KVDA
Consultant Norken International Ltd
Contractor Toddy Merchants Ltd
Project Award date 10th
November 2010
Commencement date May 3rd2011
Contract Period 6 months
Report Date 29th
April 30th
May 2013
Expected Date ofcompletion
4th
November 2011
5th
Extension of TimeGiven
3 months
Revised Contract Period 18 months
Revised Completion date 31st
July 2013
Variations Nil
Time elapsed; % 548 days; 100%
Contract sum KES108, 657, 231.90 discounted to KES 100,914,472.80
Value of work done; % Kshs 83,475,399
Payments to date Advance payment + IPC1+ IPC 2 + IPC3 + IPC 4 +IPC 5 =
KES 80,422,481.94 inc of 16% VAT
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 1-2 Progress Report July 2013
1.3 Project AreaThe scheme is located about 510 km North West of Nairobi within the Kerio Valley near
Sigor Trading Centre. Sigor Trading Centre is 7 km off the A1 Kitale- Lodwar Road. Kitale
Town, which is 120 km from Sigor, is the nearest major town that has well developed
supply facilities. The Ptokou and Sangat Irrigation Project area lies on the westernescarpment of the Rift Valley. It is within four Sub Locations; Ptokou, Sangat, Korellach
and Takar in Wei Wei Location, Sigor Division, Pokot Central District. The project lies
within longitude 350 16 E 350 31 E, latitude 1028- 10 37 N. The project area is within 900
to 1200 meters above sea level. (m.a.s.l)
1.4 Project DataProject Location Pokot Central
Project Type Gravity Fed Irrigation System
Number of Beneficiaries 957
Area To Be Irrigated 800 acres
Average Farm Size 1.0 Acres
Average Plot Size to be Irrigated 0.25 0.5acres
Water Sources Wei Wei River
Elevation of the Intake 1035m a.s.l
Project Design Capacity 403.6 l/s = 0.40362 m3/s
Irrigation System Sprinkler
Drainage Area 2EE sub basin 2B28
Minimum Flow Rate 1.0m3/s
Type of Intake Structure Concrete fixed weir
1.5 Project ComponentsThe major works expected to be undertaken are as follows:
Construction of intake works and sedimentation basin; Laying of main lines A and B in Sangat and Ptokou respectively; Laying of sub-main lines (distribution systems); Road improvement; Two demonstration sprinkler irrigation modules of 0.25 and 0.50 Acres; Construction of houses, offices and camps for the staff to benefit farmers on completion of
the project.
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 1-3 Progress Report July 2013
The works items are summarised as follows:-
Item Description Amount Revised Amount
Bill No. 1 Preliminaries and General 22,940,700.00 24,138,400.00
Bill No. 2 Intake Works 3,261,500.00 5,180,500.00
Bill No. 3 Sedimentation Tank 3,053,700.00 3,925,800.00
Bill No. 4 A Roads and Plot Demarcation, and Supplyof Sand and Aggregates for Road
Drainage Works
5, 660, 000.00 1,630,000.00
Bill No. 5 Combined Pipeline 9, 828,400.00 12,726,900.00
Bill No 6 Main Pipeline A 10,415,200.00 10,734,900.00
Bill No 7 Main Pipeline B 13,368,500.00 10,597,500.00
Bill No. 8 Ptokou Sub Mains 8,800,300.00 8,800,300.00
Bill No. 9 Sangat Sub Mains 11,826,250.00 7,203,500.00
Bill No. 10 Field Hydrant and Sprinkler System for
0.5 Acre Irrigated Module34, 500.00 34,500.00
Bill No. 11 Field Hydrant and Sprinkler System for0.25 Acre Irrigated Module
20,500.00 20,500.00
Sub- total 89,209,550.00 84,992,800.00
Discount of 7.125857% on above 6,356,944.96 6,056,465.39
Revised Sub-total 82,852,605.04 78,936,334.61
Add 16% V.A.T 13,256,416.81 12,629,813.54
Total96,109,021.85 91,566,148.15
Add 5% Contingency 4,805,451.09 0
Add for Extra Works (Bush Clearing, Furniture, Driftsand Installation of Solar Systems) and Contingency
Fund
9,348,324.65
Grand Total 100,914,472.94 100,914,472.65
Rounding - 0.14 + 0.15TOTAL TENDER SUM 100,914,472.80 100,914,472.80
1.6 Existing Irrigation SchemeAround 150 acres are currently under irrigation. The operational condition of the existing
irrigation facilities is rated to be in poor condition. This is attributed to the following
factors:
Weak institutional set up; poor water allocation mechanisms; massive water losses in the canals; poor maintenance of the canals; structural failure of the canals;
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 2-1 Progress Report July 2013
CHAPTER TWO: PROGRESS OF WORKS
2.1 GeneralThe progress of works since the contract was renewed has been slow and hence the
objective of the project has not been met. The 3 months time extension has already hasalready elapsed with substantial works still remaining. During the 10
thSite meeting the
contractor proposed to complete the remaining works during the defects liability period
2.2 Bill One: Preliminaries and General2.2.1 Programme of works
The Revised Bill of Quantities was approved by the Client and addresses all the pertinent
issues that had been an obstacle to smooth delivery of the expected project outputs
2.2.2 Project VehicleThe Contractor has provided a Supervisory vehicle Reg. No. KBP 380K with a driver inconformity with the Contract specifications
2.2.3 Offices and HousesThe offices and house for the Resident Engineer has been completed and is being use by
the Supervision Team.
As required the Contractor has complied with the Contract specifications in these
provisions.
2.2.4 Weather StationRecords of the following are currently being obtained from the site weather station,
Rainfall Evaporation Rates Temperatures Humidity
2.2.5 Surveying and Survey EquipmentThe Contractor has provided the following survey equipment:
1 No. level and stand; 1 No. stave; 4 No. ranging rods
A GPS set is being used by the Consultants staff.
2.2.6 Publicity BoardsFour Publicity Boards have been erected at the following locations:-
Marich Junction; (No longer in existence) At the junction to Sangat; At the C.D.F Office Junction; At the Junction to Ptokou immediately after Sigor Bridge.
2.2.7 MaterialsThe following were delivered in the month of July
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 2-2 Progress Report July 2013
Consignment of building materials (cement, sand and Ballast) Assortment of fittings for sedimentation basin, Combined Pipeline and Main Lines
2.2.8 Plant and EquipmentThe Contractor mobilized the following during the month of June
Toyota double cab pickup for the supervisory staff A Lorry I No. Vibrator 1 Excavator 2 No Mixers 2 No water Pumps
2.2.9 LabourThe daily labour force as deployed during the month of July is as shown in the table below:-
2.3 Bill No.2: Intake WorksUnder this Bill, the following is ongoing
Fixing of fittings to the intake chamber Increasing the height of the Intake chamber Construction of flood protection works which involve increasing the height of the
wing wall to protect the intake chamber.
2.4 Bill No.3: Sedimentation TankThe following works under this Bill has been completed;
Laying of sediment Discharge pipe Concrete works for the sedimentation basin Backfilling of the excavated sections Off take pipe has been connected to the Combined pipeline
The following works is still pending
Construction of chamber for Meter and Sluice valve for the off take pipe Installation of the Sluice Valve and raw water meter for the offtake Pipe
2.5 Bill No.4: Roads and Plot Demarcation, and Supply of Sand and Aggregates forRoad Drainage Works
In the BOQ review the contractor is expected to undertake the construction of driftson Lagas passing through Farm access Roads.
Construction of drifts is yet to commence
Contractors Staff Total No.Site Agent (Ag) 1
Support Staff 1
Foremen 4
Machine operators 1
Plumber 2
Labourers 30
Others (Watchmen) 4
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 2-3 Progress Report July 2013
2.6 Bill No.5: Combined PipelineTrenching works, lying of pipes and subsequent backfilling has been completed. Rivercrossings works under this section is ongoing
The following pertaining these Bill has been done;
Chambers for Air Valves and Washouts (2 No.) Installation of Air Valves and Washouts (1 No. each) The Y Junction for Main Line A & B has been done and subsequently 2 No. Sluice
valves to serve Main Line A and B has been installed.
2.7 Bill No.6: Main Pipeline ATrenching works and subsequent laying and backfilling of pipes has been completed. Pipe
protection works involving encasing the pipe in reinforced concrete on laga crossing is alsocomplete; 4 major Lagas with cumulative length of 50m has been done with a volume of
68.56m3
of Concrete use. The following pertaining this Bill is either pending
Installation of fittings on sectional Chambers (Gate Valves, Air Valves andWashouts)
Fixing of concrete covers on the Chambers2.8 Bill No.7: Main Pipeline Bs
The following pertaining this Bill has been undertaken;
Repair works on Laga crossing has been completedWorks on the River Crossing is ongoingAnchor Blocks for 24m of GI on laga Crossing is completePipe Encasement on Minor Lagas has been completed on the whole stretch of the
Main Line B.
Chambers for Air Valves and Washout is completeChambers for pipe junctions to the Sub Mains is complete though Installation of
respective fittings was suspended due to vandalism
2.9 Bill No.8: Ptokou Sub Mains & Bill No.9: Sangat Sub MainsThe following has been done on this Bill
505 Pipes of 90mm and 75mm diameter have been laid and backfilled on SangatKorrellach side. In total, about 7800m of Pipeline will be laid in Sangat/Korellach.
202 Pipes of 90mm and 75mm diameter have been laid and backfilled on Ptokouside. The Total Trench length excavated is 2750m and about 5500m of pipes will be
laid in Ptokou.
Laying of sub mains in Ptokou farm is ongoing2.10 Bill No.10: Field Hydrant and Sprinkler System for 0.5 Acre Irrigated Module
Instruction for execution of this Bill has been given and works will start as soon as the Sub
Mains is done
2.11 Bill No.11: Field Hydrant and Sprinkler System for 0.25 Acre Irrigated ModuleInstruction for execution of this Bill has been given and works will start as soon as the Sub
Mains is done
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 2-4 Progress Report July 2013
2.12 Extra work; Bush clearing and Laga restorationUnder the revised Bill of quantities, the Contractor is expected Clear bushes on a section ofthe Ptokou Plots and also a bit of land reclamation. Instruction on the above works as been
given and the following as been done
8.125ha of land under laga as been reclaimed Cut of drains excavated to divert water to a major laga outside the scheme. 4,000m2 of bush has been cleared 456 trees of girth between 1 -2m has been cleared by the use of the Excavator and
subsequently disposed through charcoal burning by the locals
The remaining trees is being cleared by the use of power sawBush clearing is expected to commence as soon as land reclamation works has been
completed
2.13 Value of Work doneThe reporting period marks 100% of the revised project period with value of work done at
92.8%. The table below summarises the status of progress against the BOQ items.
Item Description Revised
Amount
Amount used
to Date
% of
Value
Bill No. 1 Preliminaries and General 24,138,400.00 20,612,959.00 85.39
Bill No. 2 Intake Works 5,180,500.00 4,759,565.00 91.87
Bill No. 3 Sedimentation Tank 3,925,800.00 3,698,304.00 94.21
Bill No. 4 A Roads and Plot Demarcation, and
Supply of Sand and Aggregates for
Road Drainage Works
1,630,000.00 1,630,000.00 100.00
Bill No. 5 Combined Pipeline 12,726,900.00 12,538,135.00 98.52
Bill No 6 Main Pipeline A 10,734,900.00 10,515,660.00 97.96
Bill No 7 Main Pipeline B 10,597,500.00 13,428,650.00 97.44
Bill No. 8 Ptokou Sub Mains 8,800,300.00 7,396,625.00 84.05
Bill No. 9 Sangat Sub Mains 7,203,500.00 4,284,560.00 59.48
Bill No. 10 Field Hydrant and Sprinkler
System for 0.5 Acre IrrigatedModule
34,500.00 - 0.00
Bill No. 11 Field Hydrant and Sprinkler
System for 0.25 Acre Irrigated
Module
20,500.00 - 0.00
Sub- total 84,992,800.00 78,864,458.00 92.79
Discount of 7.125857% on above 6,077,842.96 6,056,465.39
Revised Sub-total 79,214,957.04 72,807,993.00
Add 16% V.A.T 12,674,393.13 12,629,813.54
Total 91,889,350.17 85,437,806.00
Add for Extra Works (Bush Clearing, Furniture,Drifts and Installation of Solar Systems) and
Contingency Fund
9,348,324.65 2,973,984.00
Grand Total 100,914,472.65 88,411,790.00
TOTAL TENDER SUM 100,914,472.65
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 2-5 Progress Report July 2013
2.14 Interim PaymentsThe advance payment and IPC No. 1 & 2 have been paid to the Contractor
CertificateNo.
Name Value(Gross)(KES)
Value (Net)(KES)
Status
1. Advance Payment 10,091,448.00 10,091,448.00 Approved & Paid
2. IPC 1 12,074,640.50 8,579,079.93 Approved & paid
3. IPC2 20,903,570.00 15,955,865.82 Approved & Paid
4 IPC3 21,511,665.00 19,341,096.45 Approved & Paid
5 IPC4 17,463,153.00 12,629,935. Approved & Paid
6 IPC 5 6,221,249.00 6,032,160.69 Approved & Paid
2.15 Supervision ActivitiesDuring the period the Consultants activities were as follows:-
- Held consultative discussions with the project stakeholders; the contractor, Clientand farmers representatives.
- Issued requisite and follow up instructions for construction implementation works- Getting the cost implication of all activities being done vis-a-vis the overall project
cost
- Assisted the client on contractual matters as required.- Prepared the reports expected from the project and maintained daily records.- Maintained close liaison with the Project Engineer who has been instrumental in
matters that required Clients view and advice.- Maintained close liaison with provincial administration, and farmers
representatives
2.16 Contingency WorksContingencies are expected to cater for acquisition of easement deeds where necessary,
compensation for destruction of cash crops, damages to the existing furrow, erosion
protection works, bush clearing on Ptokou farms etc and any other extra works from the
billed items.
2.17 Constrains Encountered During the Period and Solutions Mobilization by the Contractor: The contractor has been slow in executing given
instruction, mobilization of staff, materials and Machinery. The slow mobilization of
materials has greatly affected the pace of construction
Solution: The contractor to urgently execute and mobilize all the necessary materials,
personnel and machinery
Break down of Machinery; The contractor has experienced frequent breakdowns of
Water Pump and the Mixer, which has in turn slowed down construction of thesedimentation basin.
Solution; The contractor to do regular servicing to avoid break downs and to look foralternative means in solving the given problem
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 3-1 Progress Report July 2013
CHAPTER THREE: SUPERVISION SERVICES
3.1 Site Supervision StaffDesignation Name
Resident Engineer Elias Kiplangat
Inspectors 1. Bowler Chesire
Inspector 2. John Chepchieng Rono
3.1.1 Staff seconded by the ClientProject Engineer - Paul Serem (Irrigation Engineer, KVDA)
Farm Manager - John Kwetemoi
Secretary - Pamela Cherotich
3.2 Consultants Head Office Support Staff:Designation Name Based in
Managing Director Eng. John Ndemi Nairobi
Project Manager Eng. Lawrence Kuria Nairobi
Project Engineer Eng. David Gitau Nairobi
3.3 Contractors StaffDesignation Name Based in
Project Manager Eng. Kuria Wainaina Nairobi
Acting Site Agent/Plumber Boniface Sigor
Driver Festus Limo Sigor
3.4 MeetingsA site Meeting was held on 18
thof July 2013 and was attended by the following;
Client (KVDA) Contractor Consultant
3.5 VisitorsThe project Engineer KVDA and his team visited the site towards the end of the month
3.6 WeatherThe area has experienced relatively cold and wet conditions from mid to late July, early
month of July was characterised by low and temperatures and heavy showers.
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Kerio Valley Development Ptokou & Sangat Irrigation
Authority Project
Norken (I) Ltd. 3-2 Progress Report July 2013
The average Weather records were as follows:-
Weather Condition Previous Month (June) This Month July 2013
Rainfall 0.8
Wind Speed -
Evaporation rates -
Temperature 19.7
Relative Humidity 53
The area has experienced heavy rains during the month of July these affected ongoing
works on the River crossings and the remaining works at the Intake