Final Environmental Assessment for the Grace Hopper Bridge Embankment Repairs at Joint Base Charleston Weapons Station, South Carolina.

摘要

Final Environmental Assessment for the Grace Hopper Bridge Embankment Repairs at Joint Base Charleston Weapons Station, South Carolina. Federal actions that potentially involve significant impacts on the environment must be reviewed in accordance with the National Environmental Policy Act (NEPA) and all other applicable laws. The United States Air Force (USAF) has completed an Environmental Assessment (EA) to address the potential environmental consequences associated with providing erosion protection for the Grace Hopper Bridge at Joint Base Charleston (JB CHS) Weapons Station (JB CHS-WS). The Proposed Action is to provide erosion protection for the Grace Hopper Bridge from the eastward lateral migration of the stream channel along the east bank of Goose Creek. Repair is needed to prevent future erosion, as continued erosion could undermine the bridge abutments and ultimately cause the bridge to fail. The Proposed Action would stabilize the stream bank and provide protection to the embankment, which would prevent further degradation of the embankment. If the Grace Hopper Bridge were to be closed, an 8-mile detour would be required, which would result in increased traffic through other parts of JB CHS, increased fuel consumption and associated vehicle emissions, and increased costs for transport operations. There are no wetlands within the disturbance area of the Proposed Action, but work would occur within Goose Creek.