Wilson Dam Bridge Deck Refurbishment Project

Lauderdale and Colbert Counties, Alabama

The Tennessee Valley Authority (TVA) has issued a draft Environmental Assessment (EA) to refurbish and repair the dam deck and other concrete surfaces and to stop the flow of water through the deck and parapets of the Wilson Dam Bridge in Lauderdale and Colbert Counties, Alabama. Construction of the Wilson Dam began in 1918 and was complete in 1926. In May 1933, TVA acquired the dam from the U.S. Army Corps of Engineers (USACE). TVA owns the Wilson Dam while the USACE Nashville District operates the Wilson Dam locks for TVA. Both the dam and bridge are listed in the National Register of Historic Places as a National Historic Landmark.

The original wearing surface of the bridge deck was brick pavers, which were removed in the late 1950s and replaced with the current concrete deck when the additional steel superstructure viaduct was constructed over the lock. The arches appear to be constructed of mass unreinforced concrete. The bridge deck also appears to be unreinforced concrete.

Over the years, the downstream face where the concrete arches interface with the parapet have developed widespread spalls (areas where chips, splinters or fragments are broken off) with efflorescence (whitish powdery substance due to migration of mineral rich water through the porous concrete where it evaporates) and visible water movement. In addition, the sidewalk, curb, and deck have developed widespread cracking. The EA analyzes two alternatives, a No Action and an Action Alternative (Alternative E). TVA has chosen Alternative E as its preferred alternative: remove and replace existing bridge deck; patch deteriorated surfaces of arch faces, rails, and sidewalks. TVA requests your comments on the proposed actions.

Submitting Comments

Comments on the draft EA may be submitted by mail or e-mail to Mrs. Elizabeth Smith at the addresses below. To be considered, comments must be submitted or postmarked no later than May 28, 2019. Please note that comments received, including names and addresses, will become part of the project administrative record and will be available for public inspection.

Related Documents

Contact

For more information about the environmental review contact:

Elizabeth Smith

esmith14@tva.gov
400 West Summit Hill Drive, WT 11B-K
Knoxville, TN 37902