In de province of Friesland, the N381 had a standard profile for a motorway, the road was relatively narrow around Appelscha and had single-level junctions.

In addition, there was a dense urban development between Wijnjewoude and Oosterwolde along the road. In 2014 and 2015, the province of Friesland reconstructed a large section of the N381 to become a fully-fledged, provincial road with good traffic flow. The entire itinerary was expanded with overpasses, partly shifted to a new route between Wijnjewoude and Oosterwolde, and partly widened to a 2x2 lane road between Drachten and Donkerbroek.

  • Period: 2014
  • Tons supplied: 65.000
  • Material: bodemas

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We are Rock Solid

From domestic waste to new raw materials


Since its establishment in 2006, Rock Solid has been a key player the Incinerator Bottom Ash (IBA) market. Applying bottom ash as a building material in groundwork and civic engineering projects results both in a reduction of the use of natural raw materials and in a cost reduction for contractors and waste-to-energy plants.

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