Project completed by staff prior to FINLEY.
This project completes one of the final legs of the scenic Natchez Trace Parkway near Nashville, Tennessee. The bridge consists of two arches; spanning 582-ft. and 462-ft. These arches, along with intermediate piers, support the precast deck. Span arrangement includes two 204-ft. end spans, four 246-ft. typical spans and two 90-ft. intermediate spans directly over the arches.
The deck has a parabolic bottom soffit consisting of segments varying from 14-ft. to 7.5-ft. in depth. Segments weights range from 35- to 65-tons. Roadway deck elevation is 160-ft. above the valley floor with 140 ft.-tall piers, which were cast-in-place using jump forms.
The arches were erected using cable stays to support the segments until the arches were completed. The deck was erected in balanced cantilever using a ground-based crane. Casting of the 122 arch segments and 196 deck segments began in the spring of 1992 with erection beginning in the summer of 1992.