Covered Bridge at Smith Rapids . Original oil 12 x16 painted "en plein air" This is over the south fork of the Flambeau River in the Chequamegon-Nicolet National Forest. The Smith Rapids Covered Bridge is the only glue-laminated Town Lattice covered bridge in Wisconsin. Constructed in 1991, the bridge uses an attractive diamond-shaped truss pattern, called the Town Lattice. The pattern was patented in the 1820s by its designer, Ithiel Town.