Hong Kong’s Drainage Services Department is celebrating its 35th anniversary with a manhole cover design competition, inviting the public to submit their illustrations inspired by a district of their choosing. In a press release, the department said it had seen a strong response when it first held a similar competition five years ago, receiving over 1,400 design entries. Some of those illustrations had been adopted on manhole covers in places such as by the Kai Tak River and the To Kwa Wan harbourfront. To promote the current competition, the department’s representatives and its contractors co…