An environmental group has asked the state Court of Appeals to halt a proposed beach renourishment project at DeBordieu until it rules on a challenge to the state’s permit for the work.

The DeBordieu Colony Community Association plans to start work next month on a project that will place up to 650,000 cubic yards of offshore sand on 1.5 miles of beach and construct three rock and concrete groins to help hold the sand in place.

The Coastal Conservation League says the project doesn’t meet the state law that allows groins to be built only in areas where the erosion rate is high and where structures are threatened by that erosion.