Project Background

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May 2014

Construction of PSRWT completed

Mar 2014

Construction of Langat 2 Water Scheme – Phase 1 began

Jul 2009

Construction of PSRWT began

2008

Water demand in Selangor and Kuala Lumpur exceeded supply Design work for PAHANG-SELANGOR RAW WATER TRANSFER (PSRWT) completed Engineering consulting works for Langat 2 Water Scheme began

2006

PENGURUSAN ASET AIR BERHAD (PAAB) or Water Asset Management Company (WAMCO) established

2005

Kumpulan Darul Ehsan Berhad (KDEB) Preliminary Engineering Design (PED) Report (SMHB)

2002

Kumpulan Darul Ehsan Berhad (KDEB) Study (SMHB)

2000

National Water Resources Study (SMHB, RCSB et al.) Detailed Engineering Reports (Nippon – Koei / SMHB) Studies conducted by Jabatan Bekalan Air Selangor (JBAS) for the State Government of Selangor

1998

Studies conducted by Jabatan Bekalan Air Selangor (JBAS) for the State Government of Selangor

1992

Pahang Water Resources Study (SMHB), from which the Project was first conceptualized

Langat 2 Scheme

LRAL2 will be the largest Water Supply Scheme in Malaysia supplying 2260 MLD of treated water.

It will be carried out through two (2) Phases, namely Phase 1 and Phase 2 with each phase capable of treating and distributing 1130 MLD of water to the targeted demand centres.

Phase Stream Sub Total
Phase 1 Stream 1 565MLD 1,130MLD
Stream 2 565MLD
Phase 2 Stream 1 565MLD 1,130MLD
Stream 2 565MLD
2,260MLD

The current construction is mainly for the Langat 2 Water Supply Scheme Phase 1 works.

Name Description
Water Treatment
  • Raw Water Inlet Connection Chamber at the PSRWT Tunnel Outlet Portal at the end of the PSRWT Tunnel, at a location approximately 2 km from Hulu Langat town centre.
  • Raw water bulk transfer pipelines from the Raw Water Inlet Connection Chamber to the Langat 2 WTP – It consists of four (4) nos. 3000 mm dia. Raw Water Gravity Mains from the Raw Water Outlet Connection Chamber to the Langat 2 WTP to convey raw water from the PSRWT Tunnel to the WTP. Two (2) nos. will be for the Phase 1 WTP and the remaining two will be for Phase 2 WTP. Each main will connect to one Stream of the WTPs.
  • A total water treatment flow capacity of 2260 MLD comprising two (2) equal phases of 1130 MLD each namely Phase 1 and Phase 2.
  • Current construction is for Phase 1 works that will be developed in two (2) streams of 565 MLD each.
  • Residuals dewatering system and residuals landfill Staff quarters at the Langat 2 WTP site
Distribution North
  • Ampang Reservior 36 Ml with 113.0 m LSD and its associated 100 m length of 1700 mm dia. treated water gravity main from the Hulu Langat Balancing Reservoir to Hulu Langat tunnel inlet portal; 100 m length of 1700 mm dia. treated water gravity main from the Hulu Langat tunnel outlet portal to Ampang Reservior and 2200 m length of twin lined tunnel from Hulu Langat Balancing Reservior to Ampang Reservior.
  • AU3 Reservior 28 Ml with 105.0 m LSD and its assocated 10100 m length of 1500 mm dia treated water gravity main from Ampang reservior to AU3 reservior
  • Bulk distribution pipelines to the Existing Langat Balancing Reservoir i.e 4155m length of 2000 mm dia treated water gravity main from Bukit Engang balancing reservoir to the Existing Langat reservior
 Distribution Western
  • Bukit Enggang Balancing Reservoir 1 no. x 210 Ml with 114.0 m top water level and its associated 2 nos. 1900 mm dia. treated water pumping mains connecting between Treated Water Pumping Station at the Plant and Bukit Enggang Balancing Reservoir
  • Hulu Langat Balancing Reservoir 1 no. x 92 Ml with 124.0 m top water level and its associated one 1750 mm dia treated water pumping main connecting between treated water pumping station at the Plant and Hulu Langat Balancing Reservior
  • Besi Reservior 22 Ml with 96.0 m LSD and its associated 9535 m length of 2500 mm dia treated water gravity main from Bukit Engang Balancing Reservior to the tee-off to Sg. Besi Reservior and also 200 m length of 800 mm dia treated water gravity main tee-off to Sg. Besi reservoir.
  • Bukit Jalil Reservior 22 Ml with 93.5 m LSD and its associated 7250 m length of 2500 mm dia treated water gravity main from the tee-off to Sg. Besi reservoir to the tee-off to Bukit Jalil Reservior and 1050 m length of 1400 mm dia. treated water gravity main tee-off to Bukit Jalil reservior
  • Petaling Reservior 80 Ml with 92.5 m LSD and its associated 5150 m length of 2400 mm dia treated water gravity main from the tee-off to Bukit Jalil reservior to Petaling Reservoir and 5250 m length of 1950 mm dia treated water gravity main from Petaling reservior to Dengkil reservoir.