Jatiluhur - Jakarta Pipeline & Water Treatment Plant
17 January 2012
2
Project Summary
• Current piped water supply of 14,000 l/sec is inadequate
for current demand
• Demand predicted to double by 2023 to 30,000 l/sec
• Water security and pollution from West Tarum Canal
(WTC) is a concern
• Scheme to provide 15,000 l/sec of treated bulk water
over 15 years and 3 stages
• 5,000 l/sec through 78km, 1.8m diameter pipe per stage
• Piped supply offers security and quality improvements
3
Project Scale
• Hampton WTP – London. UK’s Biggest WTP @ 9.2 m3/s
• Jatiluhur is 60% Bigger @ 15 m3/s
4
Overview of Project
Water Treatment
Plant Near Curug
River
Intakes
Buaran
Offtake
Jakarta (Cawang)
Tambun
Offtake
Rawalumba
Offtake
Puser Jaya
Offtake
Muara Karang
Offtake
N
Jatiluhur
Reservoir
Key
Jatiluhur to Jakarta Pipeline:
Additional Delivery Pipeline
Required:
Water Treatment Plant Site:
River Intake Site:
Not to Scale
The Conveyance of Treated Water from Jatiluhur Reservoir to Jakarta
5
Toll
Road WTC
Major
Significant
Over Bridge
Quantitative Route Comparison
Comparison of Engineering Obstacles on Toll Road and West Tarum Canal Route Options
11
9
30
4
6
7
40% Price
Difference
6
Qualitative Options Comparison
Comparison of Toll Road and West Tarum Canal Route Options
Toll
Road
West
Tarum
Canal
Comments
Existing Land Corridor Equal
Single Land Administrator PJT2 also supply water and power
Hydraulic Profile High point in TR may increase pumping costs
Construction Access Toll junction work access problematic
Disruption (During Construction) Extensive traffic disruption likely
Disruption (Post Construction) May impact TR widening plans
Known Other Services WTC know to have extensive buried services
Social Impact Illegal development on WTC right of way sections
Environmental Impact Equal
Damage Risk (Accidental) Vehicle accident with pipe is significant risk
Damage Risk (Deliberate) Illegal connections more likely on WTC route
-
-
= Advantage
= Disadvantage
7
Toll Road – Other Constraints
• BPJT field Survey on 4th April 2011 from Bekasi to Cawang concluded it would be
impossible to install proposed pipeline
• Kep Men Kimpraswil Nr 353/2001 Chp V “Utilities in the Toll Road”
8
Route Comparison Conclusion
• Strong technical case in favour of Canal
• Toll Road option appears very attractive to start with however it is;
– Most Obstructed
– Least Practical (and in places impossible)
– At least 40% more expensive
• PJT II Operation of West Tarum Canal
Jatiluhur - Jakarta Pipeline & Water Treatment Plant
Water Supply Sustainability
Jatiluhur Reservoir Water Balance
Projected Level-Storage Curves
11
Reservoir Water Balance Model
• Monthly reservoir inflows
• Irrigation demands for wet, normal, dry years
• Municipal and industrial demands
• Future reduction in irrigation demand
• Evaporation
• Abstraction for Bandung water supply
• Additional supply for Jatiluhur Pipeline
• Minimum operating level is 75m
• Target Min Operating Level is 87.5m
12
Reservoir Levels over 20 year Period assuming 2040 Conditions
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Years
13
Reservoir Levels in 2040 with supplies to Bandung & Jakarta
• Planned supplies of 5m3/sec to Bandung and 15m3/sec to W Java & DKI
• By 2040 supply failures every 2 in 3 years
• Below 87.5m level 40% of months
• Max period below 87.5m level is 10 months
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Measures to improve reliability of supply to 95%
• Reduction in irrigation supplies of 30% by 2025
• Reservoir releases limited to agreed demands
• Reservoir operating rules to be reviewed
• PJT II - additional sedimentation monitoring
• Only minor impact expected from climate change
Jatiluhur - Jakarta Pipeline & Water Treatment Plant
Water Treatment Process
16
Water Treatment Process Principles
Easy to operate using, where
possible, local sourced
chemicals and materials
Safe access and maintenance
Allow for future upgrades to meet future legislation
Based on results from Mott
MacDonald testing regime
A robust treatment process to
cover foreseeable quality
envelope
Jatiluhur - Jakarta Pipeline & Water Treatment Plant
Pipeline Design & Route
18
Overview of Pipeline Route
Water Treatment
Plant Near Curug
River
Intakes
Buaran
Offtake
Jakarta (Cawang)
Tambun
Offtake
Rawalumba
Offtake
Puser Jaya
Offtake
Muara Karang
Offtake
N
Jatiluhur
Reservoir
Key
Jatiluhur to Jakarta Pipeline:
Additional Delivery Pipeline
Required:
Water Treatment Plant Site:
River Intake Site:
Not to Scale
Route follows Citarum River to Curug, then
follows West Tarum Canal to Cawang
19
Pipeline Route Placement Options Design factors along the West Tarum Canal:
The presence of other utilities, particularly gas mains
The need to minimise social impact;
PJT II’s need for access to the canal edge for maintenance;
The impact on houses immediately adjacent to the pipeline route;
The avoidance of engineering obstacles where possible;
Minimising disruption to existing roads during construction;
The avoidance of permanent obstruction to existing roads.
Main Road Along Canal Secondary Access Road
NORTH BANK SOUTH BANK
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3 m3 m4 m3.5 m3 m8 m3.5 m
4 - 5 m
Canal
Verge
Access
Unmade
Road
Stockpile
Clear Area
Stage 1Stage 2Stage 3
Clear Area
28 m Corridor of Impact
17 m Working Corridor
3 m3 m
Canal
1 m2 m
9 m Working Corridor
12 m Corridor of Impact
Access
Unmade
Road
VergeAccess
A. Buried Pipe
B. Elevated Pipe
Grass
Verge
TrenchSafety
TrenchSafety
Above Ground Pipes – Impact Reduction
Working corridor for buried pipe installation compared
to working corridor for above ground installation
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Pipeline Route Social & Environmental Impact
Preliminary estimate, with buried pipes approx
2,400 structure needing demolition
Iterative design has reduced working room from
15m to 9m
Pipe route switched from side to side of canal
Final estimate of structures to be demolished: 36
Houses; 46 Shops; 72 Kiosks
Approximately 180 people to be re-housed
Minimal environmental impact over existing
22
Existing Road
Canal
Houses
2.0m
1
2 3
1
8.0m 6.0m
Route – Common Position
A common position for pipeline is on wide
embankment on north side
Route on wide
north embankment
Gas Mains
Minimum clearance
under pipe when
access needed
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Artists Impression of all three
phases of 2m pipes;
West Tarum Canal; +40.000 km
Visual Impact
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Jatiluhur - Jakarta Pipeline & Water Treatment Plant
Bulk Water Supply Delivery Locations
PDAM Kab Karawang
PDAM Kab Bekasi
PDAM Tirta Patriot Bekasi
Aetra
PALYJA
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Delivery Principles
• The supply from the Jatiluhur – Jakarta pipeline should be at a constant flow rate 24 hours a day;
• There should be a single, clearly identified, offtake and delivery location for each water company;
• The investor should construct a ground reservoir of sufficient capacity for each water company to store surplus water during periods of low daily demand;
• The supply from Jatiluhur should have a free discharge so that it cannot be influenced by downstream conditions, except that it should have a valve to prevent further delivery when the delivery reservoir is full;
• If sufficient pressure head available delivery could be into an elevated tank constructed by the water company;
• The water company responsible for distribution from the delivery reservoir.
DCR 5
Cawang
Pump
Station Buaran
WTP
Pulogadung
WTP
CDC
Pejompongan
WTP DCR 4
WTP
Muara
Karang
Delivery Pipeline to Aetra
Jakarta Existing Water Storage and Required Scheme Delivery Points
Jatiluhur - Jakarta Pipeline & Water Treatment Plant
Indicative Project Costs
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Element Capex
Transmission System from Jatiluhur to Buaran US $ 229m
Transmission System from Buaran to PALYJA at Muara Karang US $ 57m
Transmission System from Buaran to Aetra (provisional sum) US $ 43m
Raw Water Intakes (2nr) US $ 24m
Water Treatment Plant (WTP) - Process US $ 85m
WTP - Waste Treatment and Disposal US $ 6m
WTP - General Site Requirement US $ 6m
Minor Items US $ 1m
SUB TOTAL Base Construction Costs US $ 451m
Engineering Contingencies US $ 68m
Construction Preliminaries US $ 89m
Detailed Design Fee US $ 23m
Construction Management Contractor Fee US $ 32m
SUB TOTAL Project Oncosts US $ 212m
TOTAL Project Costs US $ 663m
Indicative Project Costs
EXCLUSIONS: Taxes/Fees/Permits; Investors Costs; Scheme Risk &
Project Contingencies; Land Acquisition; Resettlement Compensation;
Outturn Cost Factor; Phases 2 and 3.