SUFFOLK, VA — Officials are concerned about the environmental effects after a train derailed in the Dismal Swamp.

The coal train left the tracks in the Great Dismal Swamp National Wildlife Refuge in Virginia early Tuesday. Refuge manager Chris Lowie said the Norfolk Southern train is “literally right in the middle of the swamp.”

The Virginian-Pilot reports that the coal that was being transported is a fine material, almost like sand.

The derailment is still being cleaned up and has raised concerns about the impact on various forms of wildlife. The refuge is home to endangered species such as long-eared bats and red-cockaded woodpeckers. But the coal will most likely impact aquatic species such as snakes and turtles.

Norfolk Southern said in a statement that the coal spill “is confined to a relatively small area” adjacent to the tracks in  the forested wetland. .