THREE men were jailed yesterday for plotting to lay dangerously faulty foundations during construction of a multimillion-dollar airport railway project. District Court Judge Maggie Poon Man-kay said the Hong Kong Station scam could have had 'disastrous' consequences. 'Lives may have been endangered and the image and reputation of Hong Kong affected,' Judge Poon said. Project manager Tam Tung-kee, 54, and subcontractors Tho Ah-sa, 37, and Kwong Kwong-wah, 38, pleaded not guilty to charges of conspiracy to defraud. They were convicted yesterday. Contractor Aoki Corporation and subcontractor Bachy Soletanche Group were deceived into paying $100 million for faulty foundation work between May and August 1997. Tam worked for foundations subcontractor B+B Construction - responsible for boring piles for the station and commercial complex. Only four of the 87 piles were bored to the correct depth. The court heard Tam plotted with at least nine others to defraud the developers and contractors. Tho and Kwong, who ran sonic tests of the piles, became part of the racket when they agreed to falsify test results. Engineer Wong Ka-wing, 27, already serving a jail sentence for his part in the scam, had testified that Tam, his superior, was aware of the illegal activities. Tam had asked Wong to keep him abreast of the depth of the rock penetration for the piles before concreting. 'In no way could [Tam] have said he was kept in the dark about the short piling,' Judge Poon said. She jailed Tam for three years and eight months, Tho for two years and Kwong for 20 months. Seven other men were previously jailed over the scam.