In the town of Lennestadt, Germany, the development of an industrial park on a previously unused area required the construction of a major road and is presented in this case history with respect of current measurements afterwards (Schmidt et al., 2014).

In the course of the construction of this approx. 400 m long section spanning a height difference of 28 m, a 115 m-long, 25 m-high retaining wall with a slope-fill volume of approximately 20,000 m³ was constructed near a concrete girder bridge.

Besides the height of 25 m and the slope angle of 65°, the use of road-demolition waste containing coal-tar treated with a binder as a fill material in the geosynthetic-reinforced retaining wall is a characteristic of this project.

In order to fulfil the requirements of the water regulatory authorities, the fill materials were enclosed in a geomembrane “wrapping”.

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