Fifteen acres of the coral reef, which is home to critically endangered turtles, could be destroyed to make way for two cruise ship docks as part of plans to boost tourism.
Environmental campaigners warn the George Town Harbour project will see 22 acres of the seabed dredged, and silt sedimentation will turn the “crystal-clear aquamarine waters to murky white”.
In December, the first publicly initiated referendum on the islands will decide the reef’s future, after 25 per cent of the electorate signed a petition to take the decision to a vote.
There are fears it may not save the reef as campaigners claim the Government has withheld the latest designs for the docks, and the date of the vote coming so close to Christmas will mean many residents are on holiday.
“The marine environment is the heritage of the Caymanian people and decisions made today will have consequences for generations to come,” said Shirely Roulstone, of the Cruise Port Referendum (CPR) Cayman campaign group.
The seabed will be dredged and two deep water piers constructed on pilings to allow marine life move underneath as part of the project.
The first Environmental Impact Assessment (EIA), submitted in 2015, said 15 acres of coral reef habitat would be permanently removed.
But the designs have been altered, following the selection of the preferred bidder, Verdant Isle Port Partners (VIPP) in July, and have not been subjected to a new EIA.
Campaigners have called for the full plans to be released and a new EIA carried out before the referendum.
This week the Cayman Islands Government (CIG) and VIPP have confirmed that the new plans will lead to an overall reduction in the dredge footprint, impact on coral and adverse environmental impact.
VIPP added that they will be conducting a “relocation” programme to try and save some of the critically endangered corals in the area, such as the Elkhorn and Staghorn.