Yntegra Group is dredging a sensitive marine area in the Bahamas, what happens after a dredging operation?

My friend & I and are having a debate about Yntegra group dredging Sampson Cay in the Bahamas. It's not a small repair project but a big new hotel and marina to give some context on the dredging project.

We've both watched Disney's Little Mermaid so we are clearly qualified to debate this but would like to hear from others who may or may not be as highly qualified as us. After Yntegra group does their dredging, can the marine area fully recover? What timeframe are we talking about? Are there any lasting issues to marine life? Will the new Yntegra marina and boat traffic cause any lasting issues for the sea turtles? Is there a good or bad way this could be done?

Thanks for any help.