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Construction works for Sepolia Undeground Railway Tunnel to begin in Autumn 2018



Till Autumn 2018 Athens’ new major railway project for the construction of the Sepolia Underground Railway Tunnel will begin. According to secure information, over the following month, the contract will be sent for approval to the Court of Auditors and, after that, for ratification in the Greek Parliament, two steps that will allow final signatures to come a few months later. 

It is reminded that the underbidder of the auction is INTRAKAT with a discount of 45.71%. The order of the bidding discounts was formed as follows: INTRAKAT (45,71%), TERNA (37,99%), MYTILINEOS (33,31%), AKTOR (30,57%), J&P AVAX (19,31%). Indicative of the great “thirst” for new projects is the fact that all technical companies participated on their own, without the formation of powerful joint ventures.

Sepolia Tunnel is the first, large-scale railway infrastructure project that has been auctioned in about 3 years. The cost of the project is 151.28mio euros (VAT incl., excl. VAT 122mio euros) and concerns the construction of a 1.9 km tunnel. Total length of the new quadruple, electrified line will be 2.36 km.

With the implementation of this project, the decision of the Council of State, holding from 2004, which had imposed the undergrounding of the lines, will be finally fullfilled. When operational, the tunnel will support all railway traffic to and from Athens, while on the surface there will be a major redevelopment of the currently, ran-down surrounding area with the removal of all dangerous level crossings and the construction of new recreational spaces.

Implementing entity of this project is ERGOSE. The completion of Sepolia Tunnel is expected in 2020. The project is funded by Connecting Europe Facility (CEF) 2014-2020. According to ERGOSE, the budget will be broken down as follows: 2018, 12,536,400.00 euros, 2019, 31,260,400.00 euros, 2020: 108,128,200.00 euros.

It is noteworthy that there is a provision for the uninhibited operation of the existing lines, during the construction phase of the underground tunnel. Upon the completion of the western part of the tunnel, trains will be transferred to the first 2 underground lines. The eastern part will be then removed, in order for the 2 remaining underground lines to be constructed, that will also conclude the project. Tunnelling works will require “surgical precision” as they pass between the existing Metro Tunnel of Line 2 and the city’s main water pipe.




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