An investigation is being urged of the artificial island at the Lantau end of the bridge to Macau and Zhuhai.
That's after the hk01 news website reported that a surrounding sea-wall cracked more than two years ago and that earth spilling out into surrounding waters has created new reclamation equivalent to 18 Victoria Park football pitches.
Civic Party lawmaker Kwok Ka-ki said on Monday that he has filed an urgent question with the government to find out why the problem had not been reported until now.
Earlier this month, the Secretary for Transport Anthony Cheung said Hong Kong work on the massive project should be completed by the end of this year, but that he was not sure when the bridge would open. He also said it would cost more than anticipated, but admitted he was not sure how much more.