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.

The Sept. 13 lawsuit filed in Washington, D.C., federal court names the corps as a defendant along with the Department of the Interior, the Fish and Wildlife Service, the Environmental Protection Agency and the Federal Highway Administration.