An existing culvert was adjacent to a two lane road which was constructed in the 1960’s. The road needed to be expanded to four lanes. This required placing the new lanes over the culvert area.
The existing culvert was not designed to carry the loads associated with the new roadway. A lightweight solution was required. Geofoam was selected to provide the solution. In addition to being lightweight, Geofoam is an engineered fill material with known load bearing properties. An additional advantage was that construction could be completed in various weather conditions, including winter.