The Land Transport Authority plans to build a new MRT line, likely to be fully underground. It will serve the Bukit Panjang, Upper Bukit Timah and Bukit Timah areas, relieving the heavy traffic in the Upper Bukit Timah / Bukit Timah / Dunearn Road corridor. Tenders expected for the first quarter of 2004. Visit www.gov.sg/lta 15/02.

Invitation to tender for first 1 km-long phase of $565 million cut-and-cover tunnel to house water, electricity, telecomms and air-con pipes for Urban Development Authority. Visit www.ura.gov.sg/pr/text/pr98-04.html 08/01.

  PowerGrid, a subsidiary of Singapore Power, plans to drive power tunnels at around 50 m depth to connect power stations west of the island to consumers in east. Likely to be 5 m i.d. segmentally lined using closed TBM. Three tunnels in design, 16 km-long, 12 km-long and 2 km-long. Visit www.singaporepower.sg August 2000.Downer EDI has been awarded a contract by PowerGrid, a subsidiary of Singapore Power, for the design and construction of a 2.65 km-long 5.4 m internal diameter transmission cable tunnel from Harbour Drive to the Labrador 400kV substation. Valued at S$66 million, work on the project will commence in May 2003 and the tunnel is scheduled for completion by the end of July 2005. Visit www.downeredi.com, www.powergrid.com.sg and www.spower.com.sg 20/03.

  Together these two expressways will be 12 km in length with 9 km underground. Construction due to commence 2001 for completion of Kallang in 2005 and Paya Lebar in 2006. Fifteen companies have prequalified to tender for four contracts with a value US$500 million. Contract 421 is for design and construction of a tunnel from East Coast Parkway to Nicoll Highway crossing the Geylang river; contract 422 is for a tunnel from Nicoll Highway to Pan Island Expressway; contract 423 is for a tunnel from Pan Island Expressway to Paya Lebar Road crossing Pelton Canal; contract 424 is for a tunnel and depressed road with surface road from Paya Lebar Road to just north of the Bartley Road extension. More from www.lta.gov.sg/projects August 2000. Contractors shortlist includes overseas contractors Daewoo, Sato Kogyo, Dumez GTM, Penta-Ocean, Kumagai Gumi, Hyundai, Obayashi, Wayss & Freytag, and Impregilo. Local companies include Semb-Corp, Chew Eu Hock, L & M, Koh Brothers, Lum Chang and Econ Piling. Visit www.lta.gov.sg/projects Sept 2000. Contract 421 worth S$235 million secured by SembCorp Engineers and Constructors for the design, construction and completion of the 1.5 km tunnel from East Coast Parkway to Nicoll Highway. Cut-and-cover method. Visit www.lta.gov.sg 43/01. Contract 422 for the design, construction and completion of 1.64 km of tunnels from Nicoll Highway to the Pan Island Expressway (PIE) clinched by a jv of SembCorp Engineers and Constructors Pte Ltd and Daewoo Engineering & Construction Co Ltd. The tunnel will cross under Nicoll Highway, Mountbatten Road, Geylang Road, Sims Avenue and the PIE. Cut-and-cover method. Value of approximately $257 million. Visit www.gov.sg/lta 52/02. Contract 423 has been awarded by the Land Transport Authority to Samsung Corporation for the design, construction and completion of 2.96 km of tunnels from the Pan-Island Expressway (PIE) to Ubi Road 2. The tunnels will be constructed by the cut-and-cover method and will run beneath the Pelton Canal and Airport Road, crossing Aljunied Road, Merpati Road and Paya Lebar Road. Value $364 million. Work to begin later this month for completion in February 2007. Visit www.secc.co.kr and www.lta.gov.sg 28/02.Contract 424 has been commissioned to Taisei of Japan for the design, construction and completion of 2.6 km of tunnels from Ubi Road 2 to Defu Lane 3. The tunnels will also be constructed in cut-and-cover, running beneath Airport Road, Paya Lebar Air Base before surfacing at Defu Lane 3. Value $251 million. The project is due to be completed in early 2007. Visit www.taisei.co.jp 28/02.Mott MacDonald has been appointed by contractor Samsung to provide full detailed design services for a £137 million underground section of the Kallang-Paya Lebar Expressway, as part of Contract 423 which comprises a 2.9 km tunnel, two ventilation buildings, five slip roads, two road bridges and an interchange. The 36 m-wide cut-and-cover tunnels will run below a 27 m-wide stormwater canal. Designs will be finalised in one year and the expressway is scheduled to be completed by 2005. Visit www.mottmac.com. 33/02.

Proposed Singapore Underground Road System (SURS) will comprise two 15 km-long, 2-4 lane concentric ring tunnels around the central business district, with 8 interchanges and 33 entrances and exits. Capital cost estimated at $2.4 billion and overall construction period 15 years. Visit www.lta.gov.sg/projects August 2000.

Circle Line - sg/15Metro Feasibility study by LTA for an orbital metro route connecting the suburbs to the west, north and east of the island's city centre. Preferred route links Paya Lebar on the West line to Bishan on the MRT North line, Serangoon on the North East line and Buona Vista on the East line. Construction to start 2005, following completion of the NEL, Changi Airport branch and the first phase of the Marina line. Island's rail network will be virtually doubled from 83 to 154 route-km by 2005. Four more metro routes are included in the long-term development strategy for completion by 2030, with the ring line to be followed by new routes serving Jurong, Bukit Timah and Tampines in the east. December 1999.   First stage now called Marina Line Extension, from Boulevard station at national stadium to rail staging yards at Upper Paya Lebar. Tenders for consultancy contract have closed and announcement of award pending. Visit www.gov.sg/gitis/ 15/01.   Invitation by LTA to contractors to pre-qualify for Stage 2 with route length 5.5 km from Stadium Boulevard with stations at Old Airport Road (OAR), Tanjong Katong (TKT), Paya Lebar (PYL), Macpherson (MPS) and Upper Paya Lebar (UPL), and an underground depot at Kim Chuan. PYL station will interchange with the existing Paya Lebar (East-West Line) MRT station. All stations except PYL and UPL will be designed as underground civil defence stations. Visit www.gov.sg/gitis and www.lta.gov.sg 35/01. Maunsell Consultants proceeding with $436m design contract for Circle Line second stage, with 5.5 km of bored and cut-and-cover tunnels and five underground stations. Construction to start by end-2002 for completion in 2006. Visit www.lta.gov.sg/projects 42/01. A jv of Econ Corporation Ltd and NCC has been awarded contract C822 for approximately S$338.6 million for construction of the MacPherson and Upper Paya Lebar underground stations and tunnels. Visit www.gov.sg/lta and www.ncc.se 33/02.Lum Chang Building Contractors Pte Ltd and Nishimatsu have won a S$321.6 million order for contract C823. The partners will build the Old Airport Road, Tanjong Katong and Paya Lebar underground stations and 3,300 m of bored tunnels. EPB shield machines to be used, outer diameter 6.63 m. Visit www.gov.sg/lta and www.nishimatsu.co.jp. C822 and C823 are part of Circle Line stage 2. Contract periods from 1st August, 2002 to 30th August, 2006. 33/02. The Land Transport Authority (LTA) has issued several open invitations to tender for the construction of tunnels and underground stations as part of Stage 3 of the Circle Line (CCL). Contract C852, deadline 28th April, 2003 is for the construction of Serangoon interchange station and associated tunnels between Bartley and Serangoon stations and between Serangoon and Lorong Chuan stations. Contract C853, deadline 21st April, 2003 is for the construction of Marymount station and associated tunnels between Lorong Chuan and Bishan stations and Bishan and Marymount stations. Contract C851A, deadline 16th April, 2003 is for the construction of Bartley station. Contract C852A, deadline 16th April, 2003 is for the construction of Lorong Chuan station. Contract C853A, deadline 25th April, 2003 is for the design and construction of Bishan interchange station. Contact Land Transport Authority, Projects & Engineering Office, Contracts & Process Division, Tenders Section, 1 Hampshire Road, Block 1, Singapore 219428. Contact Mr Kho Cheong Kiat, tel.+65 63961180 or Ms Low Bee Eng, tel. +65 63961202. E-mail bee_eng_low@lta.gov.sg. Tenders have already been invited for electrical services, tunnel ventilation and environmental control systems, and fire protection systems. Read E-News Weekly # 62.Stage 3 will extend the line from Upper Paya Lebar Road/Bartley Road to Marymount Road. This stretch with five underground stations is 5.7 km-long. Construction will start in the third quarter of 2003 to end in early 2008. Construction cost of about S$1.2 billion. The CCL is an orbital line linking all radial metro lines running into the city. It will run from Dhoby Ghaut to Paya Lebar, Serangoon, Bishan, Buona Vista and Harbour Front. Visit www.lta.gov.sg 10/03. The 12 prequalified tenderers for contract C852, which is the construction of Serangoon interchange station and associated tunnels between Bartley and Serangoon stations and between Serangoon and Lorong Chuan stations, are Econ / NCC International; Hyundai Engineering & Construction; Leighton; Nishimatsu; Obayashi; Penta-Ocean Construction; Samsung / Tiong Seng; Taisei; Tobishima / Wan Soon Construction; Woh Hup / Shanghai Tunnel Engineering / Alpine Mayreder; Züblin / Koh Brother Building & Civil Engineering; and Ssang Yong Engineering & Construction.The 11 prequalified candidates for contract C853, which is the construction of Marymount station and associated tunnels between Lorong Chuan and Bishan stations and Bishan and Marymount stations, are Greatearth Construction / United Engineers / Sato Kogyo; Hyundai Engineering & Construction; Leighton; Obayashi; Penta-Ocean Construction; Samsung; Taisei; Tobishima / Wan Soon Construction; Woh Hup / Shanghai Tunnel Engineering / Alpine Mayreder; Züblin / Koh Brother Building & Civil Engineering; and Ssang Yong Engineering and Construction. Visit www.lta.gov.sg 16/03. Contract C852A for construction of the Lorong Chuan station has been awarded to Sato Kogyo for S$65 million. The contract is part of Stage 3 of the Circle Line. The contract involves civil, structural, architectural, plumbing, drainage and reinstatement works for the station. More in E-News Weekly # 28/2003. Visit www.lta.gov.sg and www.satokogyo.com.sg 28/03.Prequalification, deadline 25th July, for civil construction of the stations and tunnels for Stages 4 and 5, contracts 854, 855 and 856. The internal diameter of the bored tunnels will be 5.8 m approximately. Contract 854 is for construction of 5.3 km of twin bored tunnels, 320 m of cut-and-cover tunnels, and three underground stations. Contract 855 is for construction of 4 km of twin bored tunnels, 350 m of cut-and-cover tunnels, civil works for three underground stations, and architectural and building services for another four stations. Contract 856 is for construction of 3.4 km of twin bored tunnels, 640 m of cut-and-cover tunnels, civil works for four underground stations, and architectural and building services for five more stations. Tunnelling using both slurry and EPB TBMs. Contact Land Transport Authority, Project & Engineering Office, Contracts & Process Division, Tenders Section, Section 1, Hampshire Road Block 1, Singapore 219428, Mr Kho Cheong Kiat, tel. +65 63961180 or Ms Low Bee Eng, tel. +65 63961202, e-mail bee_eng_low@lta.gov.sg. Visit www.gebiz.gov.sg 29/03.Civil works contract C852 for Stage 3 of the Circle Line (CCL), worth S$155.9 million, has been awarded to to the Woh Hup / Shanghai Tunnel Engineering Co. (STEC) / Alpine Mayreder JV. This contract involves the construction and completion of Serangoon interchange station, the interconnecting tunnels from Serangoon station to Lorong Chuan station, and from Serangoon station to Bartley station. Visit www.wohhup.com, www.stec.net and www.alpine.at 43/03.Contract C853 for the construction and completion of Marymount station including the tunnels between Lorong Chuan and Bishan stations and Bishan and Marymount stations has been awarded to Taisei Corporation for S$167.7 million. This contract involves the civil, structural, architectural, plumbing, drainage and reinstatement works for the station including the twin bored tunnels. Visit www.taisei.co.jp/english 43/03.Contract C851A for the construction of Bartley station has been awarded to Wan Soon Construction for S$63.5 million. This contract involves the civil, structural, architectural, plumbing, drainage and reinstatement works for the station. Visit www.wansoon.com.sg 43/03.Contract C853A for the design, construction and completion of Bishan interchange station has been awarded to a JV between Econ Corporation and Eng Lim Construction for S$82.2 million. This contract involves the civil, structural, architectural, plumbing, drainage and reinstatement works for the station. Visit www.econ.com.sg 43/03.Stage 3 of the CCL is 5.7 km-long with five stations, running from Bartley Road to Marymount Road, with interchange stations at Serangoon (with the North East Line) and Bishan (with the North-South Line). It will cost about S$1.2 billion to build. Visit www.lta.gov.sg 43/03.As part of Stages 4 and 5 of the CCL, the twelve prequalified applicants for contract C854 are Züblin / Koh Brothers; Gammon Skanska; Hyundai / Straits Construction; Leighton; Obayashi; Penta Ocean; Sato Kogyo / Greatearth Construction; Sembcorp; SsangYong; Taisei; Tobishima / Wan Soon; and Wayss & Freytag. Contract 854 comprises 5.3 km of 5.8 m-diameter twin bored tunnels, 320 m of cut-and-cover tunnels, and three underground stations. 43/03.The eleven prequalified proponents for contract C855 are Züblin / Koh Brothers; Hyundai / Straits Construction; NCC; Nishimatsu / Lum Chang; Obayashi; Samsung; Sato Kogyo / Greatearth Construction; Shimizu / United Engineer; Taisei; Tobishima / Wan Soon; and Woh Hup / Shanghai Tunnel Engineering Co. / Alpine Mayreder. Contract 855 comprises 4 km of 5.8 m-diameter twin bored tunnels, 350 m of cut-and-cover tunnels, civil works for three underground stations, and architectural and building services for another four stations. 43/03.The twelve prequalified candidates for contract C856 are Gammon Skanska; Leighton; NCC; Nishimatsu / Lum Chang; Obayashi / Sato Kogyo; Penta Ocean; Samsung; Sembcorp; Shimizu / United Engineer; SsangYong; Wayss & Freytag; and Woh Hup / Shanghai Tunnel Engineering Co. / Alpine Mayreder. Contract 856 comprises 3.4 km of 5.8 m-diameter twin bored tunnels, 640 m of cut-and-cover tunnels, civil works for four underground stations, and architectural and building services for five more stations. All bored tunnels to be driven using slurry and EPB TBMs. Visit www.lta.gov.sg 43/03.There have been changes in the prequalified JVs for Stages 4 and 5 of the Circle Line. There are now six prequalified applicants for contract C854 instead of 12 before. They are Zueblin / Koh Brothers / NCC; Hyundai / Straits Construction; Obayashi / Sato Kogyo / Greatearth Construction; Sembcorp; Taisei; and Tobishima / Wan Soon. Contract 854 comprises 5.3 km of 5.8 m-diameter twin bored tunnels, 320 m of cut-and-cover tunnels, and three underground stations. 17/04.There are now ten prequalified proponents for contract C855 instead of eleven. They are Zueblin / Koh Brothers / NCC; Hyundai / Straits Construction; Nishimatsu / Lum Chang; Obayashi; Sato Kogyo / Greatearth Construction; Shimizu / United Engineer; Taisei / Sembcorp; Tobishima / Wan Soon; Wayss and Freytag / China State Construction Engineering Corporation; and Woh Hup / Shanghai Tunnel Engineering Co. / Alpine Mayreder. Contract 855 comprises 4 km of 5.8 m-diameter twin bored tunnels, 350 m of cut-and-cover tunnels, civil works for three underground stations, and architectural and building services for another four stations. 17/04.The nine prequalified candidates for contract C856, instead of 12 previously, are Leighton; NCC; Nishimatsu / Lum Chang; Obayashi / Sato Kogyo; Penta Ocean; Shimizu / United Engineer; Taisei / Sembcorp ; Wayss & Freytag; and Woh Hup / Shanghai Tunnel Engineering Co. / Alpine Mayreder. Contract 856 comprises 3.4 km of 5.8 m-diameter twin bored tunnels, 640 m of cut-and-cover tunnels, civil works for four underground stations, and architectural and building services for five more stations. All bored tunnels to be driven using slurry and EPB TBMs. Visit www.lta.gov.sg 17/04.A Nishimatsu / Lum Chang JV has emerged as the lowest bidder for contract C855 as part of Stage 4 of the 33 km Circle Line. The contract is for the construction of the Holland, Buona Vista and National University Hospital stations, 4 km of 5.8 m-diameter twin bored tunnels and 350 m of cut-and-cover tunnels. Nishimatsu-Lum Chang's bids were between SGD376.4 million and SGD389 million. The next lowest bids, from the Woh Hup-Shanghai Tunnel Engineering Co.-Alpine Mayreder consortium, were between SGD391 million and SGD398 million. The other bids came from Obayashi (SGD400.3 million), SembCorp Engineers (between SGD399 million and SGD404 million) and a team formed by Shimizu and United Engineers (between SGD448.8 million and SGD452.6 million). If the lowest bid has the best chance of winning, because of the Nicoll Highway collapse, the authorities will take longer to deliberate on who should be given the job. Visit www.lta.gov.sg. Subscribe to E-News Weekly 22/2004. 23/04.Taisei put in the lowest bid to win a SGD391.6 million contract to build a section of stages 4 and 5 of the MRT Circle Line. Its bid was almost SGD30 million less than the next lowest. The contract is the first of three civil works contracts for the two stages of the underground Circle Line. It involves the building of Adam and Farrer stations, twin tunnels of 6.3 km each, provisions for future stations in Bukit Brown and Thomson Road, as well as the construction of commuter facilities. Visit www.lta.gov.sg and www.taisei.co.jp/english 30/04.A civil works contract, worth SGD399.9 million, for the construction and completion of Holland, Buona Vista and National University Hospital stations, including fit out works and tunnels for One-North station has been awarded to the Woh Hup / Shanghai Tunnel Engineering Co. / Alpine Mayreder JV, as part of Stages 4 and 5 of the Circle Line. This is the second of three civil works contracts to be awarded for these two stages. Visit www.lta.gov.sg 35/04.This JV already won contract C852 as part of Stage 3 and has purchased Black Diamond Cutters' single and twin 17 inch cutter assemblies for use on the two Herrenknecht TBMs for this project, with diameter 6.3 m on 2 x 3 km drives. Delivery is for October 2004. Visit www.blackdiamondcutters.com.au 35/04. SembCorp Engineers has clinched the final civil works contract for the Circle Line with the lowest bid of SGD335.4 million. The scope of work covers the construction of tunnels and four new stations at West Coast, Pasir Panjang, Alexandra and Telok Blangah as well as HarbourFront station fit out works. West Coast station has been earmarked as a future station as the area around it is not fully developed. Only structural provisions will be made at this station to facilitate future construction. The first stage of the line was supposed to be ready by 2007, but is likely to be delayed for at least a year because of the tragic collapse at the Nicoll Highway stretch of tunnels in April. Visit www.lta.gov.sg and www.sembcorpenc.com 42/04.The Land Transport Authority (LTA) has awarded the civil works contract 901 for the Circle Line (CCL) to Hock Lian Seng Infrastructure. The contract is valued at SGD348.4 million. Contract 901 is for the construction and completion of the Marina Bay station and tunnels. The scope of the contract also includes addition and alteration works to the existing North South Line (NSL) at Marina Bay station, diversions as well as demolition of an underpass. Visit www.hlsgroup.com.sg 10/08.The LTA also awarded contract 830A for the electrical and mechanical systems for the CCL to the consortium of Alstom Transport and Singapore Technologies Electronics. The contract is valued at approximately SGD106 million. Contract 830A covers the design, supply, delivery to site, installation, testing and commissioning of major electrical and mechanical systems, such as signalling system, platform screen doors, communications system, integrated supervisory control system, power supply system (high tension and traction power), trackworks and travel information system. Visit www.transport.alstom.com and www.stengg.com 10/08.

The Land Transport Authority (LTA) has awarded the final civil contract for Circle Line 6 (CCL6) for the construction of three-level underground Cantonment Station to China State Construction Engineering Corporation Ltd (Singapore Branch) at a contract sum of EUR129,09 million (S$205 million). Visit

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The LTA (Land Transport Authority) of Singapore has awarded Alstom a contract for the supply of the signaling system for the final phase of the Circle Line (CCL), Stage 6. The contract includes the supply of Urbalis, a supervisory system for driverless trains based on radio transmissions (CBTC), the equipment of the new trains and the locomotives for the existing line as well as the modernization of the ATS (Automatic Train Supervision) system. Connect to http://www.alstom.com. 50/17.

  Approval for 13 km automated line for opening 2004 from People's Park on new North East line via Marina Bay to Dhoby Ghaut interchange with North East and North-South lines. Nov 1998.   Engineering feasibility studies underway for S$1.75 billion, 14 km line with up to 20 stations on which construction scheduled to start year 2000. Will be developed later as an orbital route around the city centre. Sept 1999.   E-shaped S$1.8 billion Marina line is to be built in phases, starting with the central arm from Dhoby Ghaut to Marina Centre. This will be followed by the western route to Chinatown and then the eastern branch to National Stadium. December 1999.   Bids for contract to coordinate consultancy services closed. Lowest bid Hyder Consulting PTE Ltd at $2.15 million. Highest bid Mouchel Consulting Int Ltd at $9.23 million. Average bid $3.7 million. Concern has been expressed in Singapore at the ridiculously low levels of bidding on tunnelling contracts, particularly by the Koreans. Contact www.hyder-com.co.uk March 2000.On Friday 11th August the Singapore Land Transport Authority (LTA) released details of prequalification of contractors for upcoming major underground works. Eighteen groups of companies have been shortlisted to tender for six civil contracts to be awarded by LTA: two of these contracts are for the Marina Line and four for the Kallang and Paya Lebar Expressways, for which the total value is estimated at US$800 million. Click here for the full announcement. 5.4 km Marina Line with six underground stations from Dhoby Ghaut MRT Station, below Bras Basah Road to Marina Centre, and then below Nicoll Highway to Stadium Boulevard to start construction end-2001 for completion 2006. E&M systems contract awarded to consortium of Alstom Transport SA, Alstom Transport (S) Pte Ltd and Singapore Technologies Electronics Ltd, value S$282 million, for design, manufacture, supply, installation, testing and commissioning of electrical and mechanical systems. W H Architects won the first prize for the designs of both the Museum and Boulevard stations. More from www.lta.gov.sg 05/01. Bids for LTA C824 project announced as follows: Nishimatsu-Lum Chang jv S$275,662,468; Impregilo-Hua Kok jv S$343,366,000; Samsung S$345,179,600; Kumagai Gumi-SembCorp jv S$362,690,000; Obayashi-McConnell Dowell jv S$403,000,000; W&F-Econ-Chew Eu Hock jv S$447,780,000. Winning bid was S$67,703,000 below engineer's estimate. S$1.75 = US$1.00. Bids for second stage C825 close 26th March, 2001. Visit www.lta.gov.sg/projects and www.gov.sg/gitis/ 11/01. Singapore Marina Line contract 825 involves a bored metro down Bras Basah Road past the Museum, Raffles and Chijmes, with four stations at Dhoby Ghaut, Museum, Convention and Millennia, with cut and cover at each end. Ground conditions range from Jurong to Boulder Clay to OA and soft Kallang, through some of the most prestigious real estate on the island. Bids were solicited as a single lot, or split into two lots: A - two central stations plus bored tunnels; and B - two outer stations plus C+C tunnels. The following bids have been notified in millions of Singapore dollars: Wohhup/Shanghai - 348.2, A 202.3, B 186. Samsung/Econ - 359.2, A 210.5, B 162.9.Dumez/Chew Eu Hook - 387.1, A 259.6, B 185.5. Penta Ocean - 890, A 560, B330. The huge difference between high and low bids has not been explained. However, our correspondents based in Singapore maintain that Penta Ocean priced faithfully and made a good technical submission. Visit www.lta.gov.sg/projects Time will tell….18/01.Contract C824 awarded in May to Nishimatsu Construction and Lum Chang Building Contractors. Contract C825 awarded to NCC, Woh Hup Construction of Singapore and Shanghai Tunnelling Engineering Company of China, value $193 million, for design/construct of Marina Line section with two parallel 1.5 km-long tunnels to be bored in soft soil, a 700 m cut-and-cover portion, and four underground stations at Millenia, Convention Centre, Museum and Dhoby Ghaut. Design phase starting now. Overall completion scheduled in 2005. Visit www.lta.gov.sg/projects 42/01.

  Contract value $5 billion. Wayss & Freytag ordered two 6.52 m Lovat EPBs with mixed face cutterheads for delivery August and September, 1998. April 1998.   Due to open 2002, 20 km line runs entirely underground with 16 stations linking World Trade Centre to Punggol and will interchange with existing MRT at Outrani Park on East-West line and Dhobi Ghaut on North-South line. Eleven contracts along line and a twelfth for the depot. Sept 1999.   Meyco reports it is supplying Fix SLF foam admixture for soil conditioning on the 5 km x 6.56 m-diameter EPB tunnels and Fix TSG for tailshield sealant. For annulus grouting Rheocell/Rheofill, a special foam admixture, was used to prevent bleeding and segregation and overcome problems with locally available coarse sands. More information at www.mbt.com February 2000.Lovat reports machine 257/18000 broke through to Kovan station on 30th August and 257/17900 on 4th September. They will be internally disassembled in the tunnel with sacrificial skins to be left in situ because Kovan station works are at an advanced stage with no vertical access, and the permanent eye is in place and smaller than the TBM diameter. Visit www.lovat.com Sept 2000.

Extension 6.4 km from East-West metro at Tanah Merah to Changi airport for Singapore Land Transport Authority starting mid-1998 for 2001 completion and 2002 opening. One intermediate station to serve exhibition centre. Two 6.15 m Lovat EPBs for delivery early 1999. Nov 1998.   Kumagai Gumi and Sembawang Engineering awarded $127 million contract to build Changi station with tunnels connecting terminals 2 and 3, and traffic underpass by 2001. February 1999.   Progress with MRT contract 503 where Nishimatsu Construction is constructing a 3.5 km section using its Lovat RMP 242SE 18400/18500 EPB TBM. The machine is setting a 7 + 1, 250 mm-thick, 1 m-deep precast concrete segmental lining. It has total installed power of 1,775 kW of which 1,125 kW is to the 6.164 m-diameter cutting head. Propulsion is through 22 cylinders with 1.8 m stroke and maximum thrust of 4,400 t at 340 bar. The screw conveyor is 13 m long and 930 mm diameter. On board is a workshop area and 8-person mess hall. Features of this TBM include a two-stage, two-man airlock; a 3,000 lit/min ground conditioning system; TACS automatic tunnel guidance system; core/probe drill; and fire detection and dust suppression. More details at www.lovat.com November 1999.   Lovat reports westbound TBM has reached the reception shaft after completing its first drive. Visit www.lovat.com July 2000.  Lovat reports that machine 242/18500 completed its drive and broke through to Changi Airport station on 8th September. It will be disassembled conventionally from the shaft, where LTA/NCC/Kumagai held a breakthrough ceremony. Visit www.lovat.com Sept 2000.

  Two large tunnels at depths of 20 m to 50 m. Value $5.2 billion. October 1998.    Concept is to use link sewers to intercept flows from existing gravity sewers upstream of the existing pumping stations and channel them by gravity through deep tunnels to centralised STWs at the south coast and thence to discharge via deep sea outfalls. With up to 45 m water pressure, tunnels will be driven by EPB or slurry TBM with sealed, bolted, grouted precast concrete segmental lining. Final lining will be cast-in-place concrete with corrosion-resistant membrane.   North tunnel from Changi East to Kranji comprises five contracts. T-01 is for 5.9 km of 6.0 m i.d. tunnel with 5 shafts; T-02 is for 7.7 km of 6.0 m with 7 shafts and an odour control facility (OCF); T-03 for 5.2 km of 6.0 m with 10 shafts, 3 ODFs, and a 250 m lateral connector; T-04 is for 7.2 km of 4.3 m i.d. with 9 shafts, 2 ODFs, and an 800 m lateral connector; T-05 is for 12.5 km of 3.6 m i.d. with 11 shafts and one ODF. Eastern two-thirds of the North tunnel is in Old Alluvium, a competent tunnelling medium. Western one-third in granite.   Spur tunnel T-06 connecting Tanglin and Holland Road areas comprises 9.7 km of 3.3 m i.d. tunnel with 8 shafts. Alignment is in fractured sedimentary rock, dense soil and faulted ground requiring shielded TBM with hard and soft rock capability.   Tendering process complete and award imminent. Visit www.gov.sg/gitis/ for full information about tendering contractors and amounts. October 1999.   Design and construct contract for T-02 Bedok tunnel awarded to Penta-Ocean Construction Co. Ltd value S$75.6 bn plus Y1.3 trillion. Design and construct contract for T-05 Kranji tunnel awarded to jv of Philipp Holzmann/Sembcorp value S$139.5 bn. Visit www.hlzm.de January 2000.   Contract T-04 for the Ang Mo Kio tunnel of the Singapore Deep Tunnel Sewerage System has been awarded to Samsung Corporation of 83 Clemenceau Avenue, #09-01 UE Square, Singapore 239920 in the value of $45 million by the Ministry of the Environment, Sewerage Dept, tel +65 731 9591. Source www.gov.sg/gitis/ March 2000. Remaining contract awards as follows: T-01, Changi tunnel value $47.4 million to jv of WohHup and Shanghai Tunnel Engineering; T-03 Paya Lebar tunnel value $40.5 million to jv of Kumagai Gumi and Sembcorp; T-05 Kranji tunnel value $83 million to jv of Sembcorp and Philipp Holzmann. All contracts include shafts. Contract for T-06 tunnel between Tanglin and Holland Road awaiting award. Visit www.gov.sg/gitis/ for more information. May 2000. T-06 contract for 9.6 km x 3.3 m-diameter section between Tanglin and Holland Road value $60 million awarded to Zueblin Queensway who will use two Herrenknecht TBMs for completion May, 2004. On the other five contracts the shafts are under construction at 1.8 m and 3.0 m diameter for access and 10 m to maximum 16 m for working, with depths of 20 - 50 m. First TBM arrives December, 2000 to start early 2001. T-01 will use Herrenknecht TBM; T-02 NKK TBM; T-03 Mitsubishi TBM; T-04 Mitsubishi TBM; and T-05 two Herrenknecht TBMs. Visit www.herrenknecht.com and look out for www.dtss.gov.sg under construction. Sept 2000.  Braddle Road in Singapore is reported as having been lowered by a few centimetres. The event occurred shortly after the drilling of a probe hole. Contractors are working in the vicinity on contract T03 of the deep sewer scheme. Their TBM was awaiting an unsealed launch from the adjacent shaft, when sand and water entered the chamber. Local correspondents have noted the spatial juxtapositioning of the three events. Visit www.lta.gov.sg 19/01.Invitation to tender, deadline 16th September, 2005 for civil engineering for River Valley Link Sewers Contract 2 of the Deep Tunnel Sewerage System. The tender is for the laying of 3 km of reinforced concrete sewer pipes of 1,800 mm and 2,100 mm diameter by pipejacking/microtunnelling method. The contract, when awarded, will have a period of 30 months. Visit www.gebiz.gov.sg, click on Tender Notice and enter PUB000ETT05000138 as ITT No. or contact Public Utilities Board, Singapore, tel. +65 67319567, fax +65 67319699 or e-mail cheng_lay_beng@pub.gov.sg 35/05.

A joint venture between Black & Veatch and AECOM has been selected by PUB, Singapore’s national water agency, to provide engineering services for Phase 2 of the Deep Tunnel Sewerage System (DTSS).

DTSS Phase 2 will extend DTSS to the western side of Singapore through a 30 km-long South Tunnel, nearly 70 km of link sewers, the Tuas Water Reclamation Plant (WRP) and an estimated 12 km-long deep-sea outfall. The entire DTSS will result in a 50-percent reduction in land taken by used-water infrastructure with three centralized collection and treatment points: Changi WRP in the east; Kranji WRP in the north; and Tuas WRP in the west. A NEWater factory will be integrated with the Tuas WRP and contribute to Singapore’s long-term goal of increasing NEWater production to meet up to 55 percent of its total water demand. For further information click here. Visit http://www.nas.gov.sg/archivesonline/data/pdfdoc/20140610004/media_release_pub_dtss2_signing_ceremony_nea_iwmf.pdf 24/14.

Public Utilities Board (PUB) has appointed Shanghai Tunnel Engineering Co (S) Pte Ltd STEC to design and construct a subsea tunnel (1.6km lenght and 6m internal diameter) along with twin 2200mm and 1200mm diameter water pipelines connecting the Proposed Tuas Water Reclamation Plant (TWRP)/Tuas NEWater Factory to existing network in Jurong Island.  

The TWRP - Tuas Water Reclamation Plant Contract 1 value is EUR81.28 million (SGD116 million). TWRP is a key element of DTSS Phase 2 which advances Singapore's water sustainability. The plant will treat industrial and domestic used water from the western half of Singapore which will be further purified for reuse. With a treatment capacity of 800,000 cubic meters per day, Tuas WRP will be the largest facility of its kind in the world. Construction works are set to begin in July 2021 and are due to be completed in 2024.Visit http://www.stecs.com.sg and https://app.pub.gov.sg/. 26/21.