This truss bridge is unusual because not only does the top chord follow a polygonal shape, the bottom chord also follows the same polygonal design, and the deck also follows an arched or "humpback" configuration as a result. Single span pony truss bridges like this bridge most commonly have horizontal bottom chords, and horizontal decks, therefore these details are unusual. They also give the bridge a unique visual appearance as seen in the above photo, where the whole truss has an arch-like appearance to it. Among the many truss bridges in this county, this bridge is also noted for its lack of alteration.
For a pony truss built before 1915, the 104 foot span length is also fairly long compared to typical pony truss lengths for pre-1915 truss bridges. Pony truss spans in excess of 100 feet became more common after 1920.
Information and Findings From New Jersey's Historic Bridge Inventory
Discussion of Bridge
The cambered ten panel Warren with verticals pony truss bridge is riveted. It is supported on concrete abutments and wing walls. The curved top chord is a built-up box member. Outriggers are original. Lacing on diagonal members is riveted to the outside edge of the angle. Alterations are minimal. Strengthening plates have been added to the bottom chord. Stringers and deck are replacements. The NJ Transit Historic Railroad Bridge Survey recommended that the bridge be ineligible.
Discussion of Surrounding Area
The one lane pony truss bridge carries Mountain Road over one line of Raritan Valley Line track. Originally two lines of track were crossed. It is located in a wooded sparsely settled area, immediately adjacent to an intersection.
Bridge Considered Historic By Survey: No
Click on a thumbnail or gallery name below to visit that particular photo gallery. If videos are available, click on a video name to view and/or download that particular video.
Original / Full Size Photos
|A collection of overview and detail photos. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution.|
Mobile Optimized Gallery
|A collection of overview and detail photos. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem
(dial-up) users, or those who do not wish to wait for the longer
download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer
© Copyright 2003-2018, 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.