Environmental Initiative of the Year
The Emscher Project - Back to Nature!
The Emschergenossenschaft in Essen is currently progressing one of the largest environmental projects in the world, namely, the restructuring of a whole river system. This system has been used as an open wastewater transport system for more than 100 years as a consequence of extensive coal mining activities. After 2020 the whole river Emscher, (total catchment 865 square-kilometers) will be transporting clean water again. To reach this target, it will be necessary to build a large 51 km long, underground sewer from Dortmund to Dinslaken, through a densely populated conurbation. This central Emscher sewer will have diameters varying between 1600 and 2800 mm at depths between 25 and 40 meters below the surface. Shafts will be constructed at up to 1200-meter intervals. In early 2012, the construction of the largest section of the Emscher interceptor was awarded to Wayss & Freytag ingenieurbau. The contract requires the construction of about 47 km of sewer tunnels. In addition to the tunnels, more than 100 construction pits have to be excavated, from which the tunnels will be driven by pipe jacking. In October 2015, tunnelling was successfully completed ensuring that upon project completion, the whole river Emscher will be free of wastewater and can be returned to its natural state with ecologically redesigned rivers and new recreational areas.
Presented by Klaus Rieker - Wayss & Freytag IngenieurBau AG