Underground Mining Drinking water and irrigation tunnels
Water supply for Heraklion and Agios Nikolaos, Crete
Through a 3.5-km tunnel, water is channelled from the historic plateau of Lassithi on Crete (Zeus is said to have been born here according to legend) into a newly created water reservoir located approximately 600 m lower down (Aposelemis Dam). From there the water is fed via pipelines and after appropriate treatment into the drinking water grids of Heraklion and Agios Nikolaos.
Under a service contract with the Greek construction company Intrakat, Jäger’s primary contribution was to provide a 5-m double-shield tunnel boring machine, reconditioned in line with the state of the art, and completely new trailing gear. In addition to this tunnel boring machine adapted for an incline of 15%, Jäger provided another specialist device, specialist personnel in key positions, expertise and consulting services as well planning services.
The installation of the TBM and the trailing gear began as scheduled in November 2014, meaning that the boring of the 3.5-km Aposelemis tunnel could begin in March 2015.
The truly arduous journey through the Greek mountains began on 01.03.2015 at the valley portal in Avdou and was completed after 35 months of construction when the tunnel reached the 3,430 m portal at the Lasithi plateau.
Breakthrough occurred on 29.11.2017.