Most industrial buildings with any historic value have been demolished, and the few remaining are linked to the city's water supply. Lee Ho-yin, director of the University of Hong Kong's architectural conservation programme, said rapid economic development had accounted for the majority. 'The remainder are water engineering works,' he said. 'Industrial heritage is an important part of our heritage which we should preserve.' Damien Ku Chi-chung, a retired deputy director of water supplies, said water had been an important issue in the city before the 1980s. 'The government did a lot of work to stabilise the city's water supply, and many of these efforts include massive and advanced engineering projects,' he said. 'It would be great if there was a proper museum.' Mr Ku said key sites include the Bowen Road Aqueduct (built in 1888); Tai Tam Tuk Pumping Station (1904); and the 'brick house' (1895), which was staff quarters for water engineers.