The catchwater, near the Pineapple Dam Nature Trail in Shing Mun, was commissioned in 1936. Rows of step irons with “H.K.↑W.W.” on each were made to provide access mean by maintenance personnel to the catchwater. H.K.W.W. stands for Hong Kong Water Works, while the wide arrow is a symbol used in the property or arms that belong to the government. The step irons are well-preserved, but you are advised not to step on them or go to the catchwater for safety reasons.