The construction of the West Link will generate big amounts of surplus material that must be taken care of. The sale of future rock masses was initiated in November, and in the beginning of 2016 we will start procuring the reception of soil masses.
The West Link will run underground through rock, soil and clay. Approximately two thirds of the tunnel will run through rock and, in order to construct this section, we must blast the rock underneath the surface. At the locations where the ground consist of soil and clay we will dig shafts, in which we will lower concrete tunnel sections into the ground. The shafts will later be refilled. Both blasting the rock and excavating the soil and clay generates big amounts of masses.
The masses can be used as a resource for societal development and some of the mass can be reused straight away as part of the project. The overall objective is to ensure that the masses generated by the West Link will benefit society by being used in construction within the region; only a limited amount should be transported longer distances. Our focus is to reduce disruptions caused by the transports in the city's central districts.
Sale of rock masses and reception sites for clay masses
In November 2015 we started selling the future rock masses. Many parties might be interested to take part of the masses when the time comes.
In the beginning of 2016 we will start procuring the reception of soil and clay masses which must be transported off site during the construction of the West Link. There are both contaminated and more natural masses that need to be dealt with, but the reception sites for the different types of masses will be separately procured.
The contaminated masses constitute approximately 250,000 cubic metres, and have different levels of contamination. Around 1,700,000 cubic metres of masses have a lower level of contamination, which means that they are generally clean enough to use, for example as filling under residential properties, and can be reused for most construction purposes.