The mountainous Bombowlee Creek Road, which is an important timber haul road, has been the subject of many landslides over the years and in the 2000’s, a serious landslide occurred which threatened to reduce the dual carriageway to a single lane.
SCE was asked by Tumut Council to advise on the cause of the landslide and the remedial works required. During the SCE investigation it was discovered that the main cause of the landslide in the area was the capture and channelling of stormwater drainage in the area. Also, the large granite excavation had been blasted during construction and had created a very porous uphill excavation. As a consequence, SCE recommended to firstly control the subsoil and overland drainage and secondly, localised reconstruction of the roadway in the vicinity of the slip by using piles and anchors.
Subsequently, Council undertook the recommended drainage works but limited funds prevented the construction of the piling and anchoring works.