Historic Name: Stillwater Bridge
Mn/DOT Bridge Number: Bridge No. 4654
Bridge Type: Vertical lift bridge
County: Washington (Minnesota), Saint Croix (Wisconsin)
City/Township: Stillwater, Minnesota; Houlton, Wisconsin
Crossing: Mn. Hwy. 36 and WI Hwy. 64 over the St. Croix River
Engineer: Ash, Howard, Needles and Tammen (vertical-lift span), Minnesota Department of Highways (fixed spans)
Contractor: Peppard and Fulton
Year Built: 1931
Overall Length: 1,050 feet
Overall Width: 23 feet
Adapted from the National Register of Historic Places nomination form prepared by Jeffrey A. Hess. The Stillwater Bridge was listed on the National Register of Historic Places in 1989.
Summary of Historic Significance
The Stillwater Bridge is a relatively unaltered 10-span, 2-lane highway crossing of the St. Croix River. Resting on reinforced concrete piers and abutments, the bridge superstructure displays, from east to west, the following sequence of spans: 1 concrete-slab approach span, 5 fixed steel trusses, one vertical-lift span, 1 fixed steel truss and 2 concrete-slab approach spans. In addition to its 10 spans, the bridge includes a counterweighted, tower-and-cable, vertical-lift span of the Waddell and Harrington type. The Stillwater Bridge is historically significance as a rare surviving example of vertical-lift highway bridge construction of the Waddell and Harrington type. Although the concrete deck was rebuilt in 1973, as was the east-shore, concrete-slab, approach span in 1979, none of these alterations has significantly affected the bridge's integrity.
National Trust for Historic Preservation's 1997 "11 Most Endangered Places"