ROAD construction and other building work could be partly to blame for Sunday's fatal landslide in Aberdeen, it emerged yesterday. A preliminary investigation by government geotechnical engineers has revealed three areas of little-known construction on the Nam Long Shan hillside. Chief engineer Dick Martin refused to be drawn on whether the work could have destabilised the hillside. 'I wouldn't want to speculate on the causes before the incident has been fully investigated. But it does confirm our earlier view that it was not a wholly natural hillside,' he said. Mr Martin said engineers found sections above Nam Long Shan Road had been cut and filled during construction of the highway more than 50 years ago. These areas were close to the crest of the landslip. A small cut slope had been formed between Shum Wan Road and the seashore as part of a reclamation project in 1978. Using aerial photographs, geotechnical engineers also discovered areas between the two roads which were cleared and then dumped with rubbish. Engineering sources said it was likely the cut and filled sections were most to blame for the tragedy. 'Storm water would have found it easier to penetrate these less compacted areas. The water, having nowhere to drain away, would have saturated the ground until it gave way. But it doesn't explain why the landslide was so large,' one expert said. More than 40,000 tonnes of rock and earth slid about 70 metres, burying a small boatyard at the foot of the hill. Government engineers also admitted there had been two rock slides at the site of Sunday's landslide in Chai Wan, where 10,000 tonnes of rock fell across Fei Tsui Road burying a 16-year-old boy. The first incident was in 1989 when about 80 tonnes of rock collapsed. The second was in 1993 when 140 tonnes fell. The present investigation would focus on why the landslide was so large and why debris travelled as far as it did - 25 metres across the road.