| Key Facts |
| Bridge Name | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date / Builder or Contractor |
| Ouaquaga Bridge | Dutchtown Road Over Susquehanna River | Ouaquaga: Broome County, New York | Metal Pinned Lenticular Through Truss, Stationary | By: Berlin Iron Bridge Company of East Berlin, Connecticut |
| Technical Facts |
| Structure Length | Span Length | Roadway Width | Main Spans | Approach Spans |
| 341.6 Feet (104.1 Meters) | 170 Feet (51.8 Meters) | 17 Feet (5.2 Meters) | 2 | None |
This bridge is perhaps one of the most beautiful bridges in New York State, and one of the best examples of a lenticular truss bridge in the country. While other examples of lenticular truss bridges exist, and some feature longer and more spans, this bridge is special because it is also in a very attractive natural setting. This sets it apart from some of the other larger examples which are often in urban settings. Here, this bridge's complex geometry with the distinctive lens shape, along with the ornate portal bracing decorations are able to stand out, unencumbered by the complexity of an urban setting. Instead, beautiful, large rolling hills and a winding river create a complimentary background. Both bridge and hills are visible from a nicely elevated spot near the bridge, resulting in excellent photos.
The bridge retains good historic integrity, although some alterations can be found. Most notably, the deck features steel deck stringers and a metal grating deck. The original deck was wooden. In addition, some of the diagonal rods do not appear to be original. The railings are not original either. However the floor beams and the rest of the truss web appears to be largely unaltered. The only easily visible alteration on the bridge is the modern cap placed on the stone pier, however the reason this was placed was quite logical, as the pier was severely damaged during a flood, and this had to be done to keep future floods from washing the bridge away.
Be sure to review the HABS HAER page for technical drawings of the bridge as well as a detailed history.
Like any surviving lenticular truss bridge, this bridge is nationally significant as an extremely rare and important type of metal truss bridge. The design was known for its graceful and distinctive lens-like shape. The design was one that the Corrugated Metal Company patented and built in various places in the country, from New England to Texas. Today lenticular truss bridges are distinguished as one of the rarest types of bridge in the country. Any remaining example is extremely significant and should be given high priority for preservation.
The Ouaquaga Bridge is particularly significant since it is a multi-span example, with two spans each of notable size. To top that all off, the bridge is an example of a skewed lenticular truss bridge, which only makes it more rare. The skew present on the bridge is 13 degrees. The bridge is skewed to the river itself by 9 degrees and 45 minutes according to HABS HAER's page for the bridge. Certainly the engineers who designed this bridge deserve credit for taking a complex bridge design and skewing it, which would only add to the complexity of the design.
Following the time that HistoricBridges.org documented the bridge, the historic bridge has been bypassed by a modern bridge. The historic bridge was not be demolished however and has been left open for pedestrian use only. Interpretive signage has also been posted. The bypassing of this bridge represents an excellent preservation solution that meets the needs for a safe and efficient vehicular crossing, while also maintaining the historic bridge as an accessible landmark with a good level of historic integrity.
The bypassed bridge as it appears today. Photo Courtesy of Amy L. Osier and Delta Engineers
