The city of West Palm Beach is suing federal agencies over a planned extension of State Road 7, claiming the project could harm endangered species and pollute public drinking water.

The planned 8.5-mile extension would stretch from Okeechobee Boulevard to Northlake Boulevard in Palm Beach County, running partially through the city and abutting the city-owned Grassy Waters Preserve. West Palm Beach claims the permitting process for the project, approved in July by the U.S. Army Corps of Engineers, overlooked environmental concerns.