A 12-barge tow enters Pickwick Lock in Counce, Tenn., Oct. 24, 2013, during a 75th Anniversary event attended by guests from Tennessee, Alabama and Mississippi. Pickwick is one of nine Tennessee Valley Authority navigation locks on the Tennessee River tha

- Image ID: DH51F3
A 12-barge tow enters Pickwick Lock in Counce, Tenn., Oct. 24, 2013, during a 75th Anniversary event attended by guests from Tennessee, Alabama and Mississippi. Pickwick is one of nine Tennessee Valley Authority navigation locks on the Tennessee River tha
MixPix / Alamy Stock Photo
Image ID: DH51F3
A 12-barge tow enters Pickwick Lock in Counce, Tenn., Oct. 24, 2013, during a 75th Anniversary event attended by guests from Tennessee, Alabama and Mississippi. Pickwick is one of nine Tennessee Valley Authority navigation locks on the Tennessee River that is operated and maintained by the U.S. Army Corps of Engineers Nashville District.