Tsuen Wan New Town
The Tsuen Wan Drainage Tunnel protects the Tsuen Wan New Town and Kwai Chung areas. The 5.1-kilometre tunnel begins at Wo Yi Hop, north of Kwai Chung, and curves around the north of Tsuen Wan proper. Past Chai Wan Kok, it parallels the Tuen Mun Highway a short distance and then empties into the Rambler Channel. Construction of the $1.5 billion tunnel commenced in 2007. It was commissioned on 28 March 2013.