This bridge is nationally significant as an early example of a truss bridge which used standard interchangeable parts, early enough that the patent that was given to Parker for the design of this bridge and others like it built during the time was done partially for this reason. Unlike bridges before it, the bridge design and proportions could remain constant regardless of the size of the bridge being built. The Charles H. Parker who patented this design is also the same person for whom the Parker truss configuration is named for. It is important to note that the Lower Rollstone Bridge is a bowstring truss following the Parker patent, not a Parker truss itself. However the bridge should be considered further significant as a bridge directly associated with a famous truss bridge engineer.
The bridge is also an early example of a metal bowstring truss bridge, and a noteworthy example of the National Bridge Company's and Parker's take on the bowstring design. Bridge companies had their own very unique bowstring designs during the 1870s as they all experimented with iron to try to find the best way to use the material for the purpose of bridge building. This design of bowstring features a rather massive top chord that includes a corrugation in the interior. The bridge features comparatively lightweight diagonal members. A unique visual detail is the distinctive decorative bollard/post attachments that attach to the actual endpost. Serving as a decorative accent to the bridge, these bollard/posts display the bridge company name.
This nationally significant historic bridge has simply been abandoned and is in an overgrown area where it is difficult to be able to appreciate and enjoy the bridge. A suggested preservation solution for this bridge would be to relocate and restore the structure into a park or non-motorized path. Any restoration project done on this bridge should be of the most meticulous kind, with care being taken to maintain every aspect of the historic integrity of the bridge and its original materials. No parts or materials on this bridge should be replaced with modern substitutes, including rivets. Although the bridge appears to retain good structural integrity, if any parts did need to be replaced, they should be exactly replicated.
Original / Full Size Photos
|A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer|
Mobile Optimized Photos
|A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer|
Coordinates (Latitude, Longitude):
View Bridge Location In:
© Copyright 2003-2021, HistoricBridges.org. All Rights Reserved. Disclaimer: HistoricBridges.org is a volunteer group of private citizens. HistoricBridges.org is NOT a government agency, does not represent or work with any governmental agencies, nor is it in any way associated with any government agency or any non-profit organization. While we strive for accuracy in our factual content, HistoricBridges.org offers no guarantee of accuracy. Information is provided "as is" without warranty of any kind, either expressed or implied. Information could include technical inaccuracies or errors of omission. Opinions and commentary are the opinions of the respective HistoricBridges.org member who made them and do not necessarily represent the views of anyone else, including any outside photographers whose images may appear on the page in which the commentary appears. HistoricBridges.org does not bear any responsibility for any consequences resulting from the use of this or any other HistoricBridges.org information. Owners and users of bridges have the responsibility of correctly following all applicable laws, rules, and regulations, regardless of any HistoricBridges.org information.