Dornan Drive Tunnel (28C0318, called Garrard Blvd. Tunnel until ca. 2000) is a single-tube concrete-lined tunnel measuring 740 feet long and 34 feet wide. Decorative features include capstones and rusticated arch stones with ornamental keystones at the north and south portals. The decorative paint on the north portal headwall is a recent addition. The south portal headwall retains its original smooth concrete surface.