Invitation to prequalify, deadline 1st February, 2007 for construction works of five separate highway tunnels and their connection roads. The outlines of the five tenders are as follows:1) Sariyer-í‡ayirbasi highway tunnel-í‡ayirbasi crossing and connection roads-Kestanelik crossing and connection roads: 4,100 metres of tunnel construction2) Dolmabahí§e-Fulya Arasi highway tunnel-Dolmabahí§e crossing and connection roads-Fulya crossing and connection roads: 2,027 metres of tunnel construction3) Eyüp Silahtaraga Caddesi-Gaziosmanpasa Caddesi highway tunnel and flyover with crossing and connection roads: 200 metres of tunnel construction4) Fulya-Levazim highway tunnel: 4,450 metres of tunnel construction5) Levazim-Akatlar highway tunnel-Levazim crossing and connection roads-Akatlar crossing and connection roads: 3,360 metres of tunnel construction.Contact Istanbul Büyüksehir Belediyesi, Altyapi Hizmetleri Müdürlügü, M. Nezihi í–zman Mah. Kasim Sok. No. 62, 34010 Merter-Güngören, Istanbul. Tel. +90 2124494000, fax +90 2124494470. E-mail altyapi@ibb.gov.tr. Click here. 05/07.Within its investment programme, the Istanbul Metropolitan Municipality awarded last year the Dolmabahí§e-Dolapdere-Piyalepasa-Kagithane highway tunnel to a consortium of Kiska Komandit and Mak-Yol at a price of YTL105 million. This is a 2 x 3,800 m-long tunnel, built in NATM using hydraulic hammers. The carriageway width is 9.5 m and the diameter is 14 m. There are four attacks (one from each side in each tunnel) and 2,100 metres has already been built. Visit www.kiskagroup.com and www.mak-yol.com.tr 05/07.

Restricted call for tenders, deadline 15th August, 2006 for prequalification for the construction work of the Bagbasi dam and Mavi tunnel (blue tunnel). Work will include construction of the 109 m-high Bagbasi concrete faced rockfill dam and Mavi tunnel, which has an interior diameter of 4 m. As part of the tunnel, 17,061 m will be bored by TBM and 995 m bored by the conventional method. The project is located at Hadim district in the Konya province in Central Anatolia. Work is scheduled to start within 30 days following the notification date of the signed contract and should be completed in 1,800 calendar days. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=121916-2006, OJ S 115, or contact General Directorate of State Hydraulic Works (DSI), Ankara, fax +90 3124183413. E-mail adundar@dsi.gov.tr 26/06.The Bagbasi dam and 4 m-diameter Mavi tunnel, whereof 17,061 metres bored by TBM and 995 metres by conventional method, will be constructed by Ilci Group. The contract is worth EUR92.8 million. A groundbreaking ceremony took place on 6th July, 2007. Visit www.ilci.com.tr 32/07.

Tinsa will build a 11,820 m tunnel for Akenerji, as part of the Uluabat hydropower project in Bursa province, Marmara region. The excavated diameter is 5 m and the lined diameter 4.3 m. The project also includes a surge tank and down surge tunnel. A Herrenknecht slurry and hard rock mixshield will be used. The geology is weak metadetritic formation with clay zone on most of the length (10,800 m) and limestone (1,500 m). The tunnel will be lined with six 1.2 m-long precast concrete segments per ring, produced by the contractor Tinsa. Mucking-out by locomotive and muck cars. The expected date for tunnelling start is eight months from now. Visit www.akenerji.com.tr, www.tinsa.com.tr and www.herrenknecht.com 31-32/05.

Invitation for prequalification, deadline 7th June, 2004 for upgrading of the Kavak-Merzifon Road (section II), approximately 18.7 km, to a two-lane dual carriageway, including a new alignment for 11.8 km consisting of four tunnels. Contact Ministry of Public Works and Settlement, General Directorate of Highways, Directorate of Cost Estimates and Specifications, Block D, Floor 2, 06100 Yucetepe, Ankara. Tel. +90 3124158011, fax +90 3124191662. E-mail fsaruhan@kgm.gov.tr 18/04.

  Construction of 10,700 m-long Zamanti diversion tunnel under way by contractor Akpinar Group. As of 5th February, 2003 the total excavated length is 3,284 m (3,064 metres from the outlet and 220 m from the inlet). Horse shoe-shaped tunnel with excavation diameter of 4.5 m (21 sq m) and finished diameter 3.5 m. Geology mainly consists of agglomerates and agglomerates and basalts. First330 metres of the outlet section excavated with Paurat E134 roadheader and the remaining parts using drill/blast with Sandvik Tamrock jumbo, Volvo L-120 loader for loading and Volvo 5350 articulated dump trucks for hauling. Initial support by shotcrete and wire mesh Q188/188 and NPI 160 steel ribs (where necessary) and rock bolts (where necessary). Final lining in reinforced concrete.US$50 million cost financed by the Ministry of energy and natural resources, General directorate of state hydraulic works. Visit www.sandviktamrock.com, www.akpinargroup.com.tr and www.dsi.gov.tr/enghm.htm 08/03.

Prequalification for construction of the 80 km Izmir commuter train development project between Aliaga and Cumaovasi, including two double-track tunnels totalling 5 km. Prequalifiers will be announced on 16th January, 2003. Estimated tender value US$114 million. Visit http://ted.eur-op.eu.int/udl?request=Seek-Deliver&language=en&docid=181819-2002, OJ S 229, or contact Greater Izmir Municipality, Kararlar ve Tutanaklar Sube Müdürlügü (Directorate of decisions and protocols) or Rayli Sistem Müdürlügü (Department of railway systems), Cumhuriyet Bulvari, No. 1, Kat: 3, 35250 Konak, Izmir. Tel./fax +90 2324894691. 49/02.Open invitation to tender, deadline 29.12.2008, for stage 2 rehabilitation works for Izmir commuter rail system including Karsiyaka tunnel, four stations and 3 km of route. Duration of works 180 days commencing five days from award. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=287898-2008 Contact Izmir Greater City Municipality, tel 232 293 1603, e-mail ataturkel@izmir.bel.tr 46/08.

A consortium led by Stone & Webster has signed a $10 million contract for the engineering and design for the Konaktepe dam and hydroelectric power plant on the Munzur river near Ovacik in the Tunceli province, east central Turkey. This is the first of two phases of the project. The consortium will then negotiate the construction phase, estimated at $300-$400 million, which includes a 15 km power tunnel. The other members of the consortium are ATA Insaat Sanayi ve Ticaret A.S., a Turkish construction firm responsible for the dam and civil construction, Strabag of Austria for the tunnel and surge chamber, Soyak Uluslarasi Insaat ve Yatrim A.S., a Turkish construction firm who will assist Strabag with the tunnel and surge chamber, and VA Tech Hydro GmbH & Co., an Austrian electrical and mechanical equipment supplier, who will supply the hydro-mechanical and electrical equipment.Visit www.shawgrp.com 13/02.Strabag, member of the Stone and Webster-led Konaktepe consortium including ATA Insaat, Soyak, and VA Tech has awarded consulting services including geophysical surveys, geological and geotechnical modelling for the 14 km-long Konaktepe power tunnel to iC consulenten based in Salzburg, Austria. The project is located in Tunceli province, some 800 km east of Ankara. The power tunnel will have an inner diameter of about 6 m and will be TBM-driven. Site works commenced on 6th June, 2002. More from Dr. Johannes Kleberger, j.kleberger@ic-salzburg.at. Also visit www.ic-vienna.at 26/02.

Tekfen reports completion of four 15 m-wide NATM tunnels: T1, 375 m; T2, 640 m; T3, 3.875 km; T4, 1.210 km. Project included an 11.5 m-diameter x 38 m-deep ventilation shaft. Visit www.tekfen.com.tr 38/01.Tekfen reports 500 m-long, 15 m-wide, twin-tube Kirkgecit 7 and 350 m-long Cakit NATM tunnels on Ciftehan-Pozanti motorway under construction. Visit www.tekfen.com.tr 40/01.

  Contractor Strabag constructing two 275 m-long x 100 sq m diversion tunnels, 620 m x 12 sq m grouting galleries, 140 m x 25 sq m access gallery, and 955 m x 75 sq m road tunnel for Borcka hydro project using four Atlas Copco drillrigs. Fleet will move 18 km upriver for similar programme at Muratli hydro project. Visit www.strabag.at and www.atlascopco.com December 2000.

  500 km-long Kara Deniz highway under construction from Hopa to Samsun. First 18 km-long section from Georgia border at Hopa to Sarp includes 3 km-long twin tunnel in basalt excavated with handheld Atlas Copco BBR 16 pneumatic machines. Second 1.36 km twin tunnel underway by contractor Cengiz near Cayeli on six faces using two Atlas Copco L2D Rocket Boomers in basaltic tuff and agglomerate, and third site will require 500 m-long twin tunnels. Visit www.cengizgroup.com.tr and www.atlascopco.com December 2000.Siemens is supplying an operations management and traffic control system to the value of around EUR57 million for 29 tunnels on a 4-lane road from Espiye to the Sarp/Batumi border checkpoint along the coast of the Black Sea in the direction of Georgia's border. Siemens will be installing a central control station with seven control substations as well as the entire technical infrastructure with traffic control, fire protection, fire fighting, power supply, lighting, and ventilation systems as well as communication and camera monitoring equipment with automatic event detection. Click here for more. Visit www.siemens.com/traffic 08/08.

Siemens is to equip the 1,050 m Dorukhan tunnel between Mengen and Devrek on the Kastamonu Highway in Turkey with the latest power, lighting and ventilation equipment, along with the associated safety and communications systems. The order was placed by KGM, Turkey's General Directorate of Highways. Click here. Visit www.kgm.gov.tr and www.siemens.com. 29/11.