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Less surplus materials than anticipated

According to new calculations, the surplus soil, clay and rock materials from the construction of the West Link have been estimated at just over 20 percent less than the original calculations.

This means over 210,000 fewer return journeys by lorry than had previously been estimated.These calculations are presented in a new report on materials handling and transport (see link below). Compared to the calculations presented in the 2014 railway plan, approximately 25 percent less clay and soil will need to be excavated, and around 15 percent less rock will need to be blasted away. This means over 210,000 fewer return journeys by lorry than had previously been estimated.

Years of improvement and optimisation work lie behind these new calculations.

- With more in-depth knowledge and a more detailed understanding, the calculations can be more precise," explains Mira Andersson Ovuka, Trafikverket's Environmental Expert for the West Link. "Throughout the entire project, we will carry out optimisations to improve efficiency and to ensure as little impact on our surroundings as possible.

Some of the excavated materials can be used in situ. There are various reception sites for other materials, depending on the type of material in question. The future rock masses were sold last year. Contaminated soil and clay masses are being sent to companies that specialise in dealing with these, and agreements for this are already in place. Work is under way to identify suitable locations for the uncontaminated surplus materials, and a number of agreements have already been signed.

- We've begun discussions with the City of Gothenburg on using a significant portion of the uncontaminated surplus materials to stabilise the area around Frihamnen before work begins on building housing there," adds Mira. "There are also several other possible uses for these materials.

The report is Trafikverket's final report on one of the conditions imposed by the Swedish Government on the construction of the West Link and the Olskroken Project. It also forms part of the material submitted today to the Land and Environment Court ahead of the environmental judgement negotiations due to take place in October this year.