Broward County plans to widen five miles of eroded beaches from northern Fort Lauderdale to southern parts of Pompano Beach. The project is near an offshore coral reef in South Florida.
Cry for Water is a nonprofit conservation group that fears the new sand will destroy the coral or make them vulnerable to diseases.
Dan Clark is the group's director. He says the Army Corps of Engineers did a less than complete review of the project.
"All we are asking for it that they don't cut any corners and they do the thorough review process to minimize any impact in the reefs and make sure taxpayers dollars are being spent properly," he said.
Clark says there needs to be a minimal impact from these projects to let corals recover from other things, like high sea temperatures.
The project starts this fall until spring to avoid sea turtle season. The county will add 750,000 cubic yards of sand, and it will cost around $35 million.
Nicole Sharp is the natural resources administrator for Broward County. She says if there's damage, the county would build more than 6 acres of artificial reefs.
Cry for Water is asking people to send letters to the Army Corps of Engineers, so the project can be properly reviewed.