HistoricBridges.org Menu: HistoricBridges.org Menu:

We Recommend:
Bach Steel - Experts at historic truss bridge restoration.

HistoricBridges.org: Bridge Browser

Bergeys Mill Road Bridge

Bergeys Mill Road Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: May 30, 2010

View Photos
and Videos
View Maps
and Links

Facility Carried / Feature Intersected
Bergeys Mill Road Over East Branch Perkiomen Creek
Rural: Montgomery County, Pennsylvania: United States
Construction Date and Builder / Engineer
1893 By Builder/Contractor: John Denithorne and Sons of Phoenixville, Pennsylvania
Rehabilitation Date
Main Span Length
94.2 Feet (28.7 Meters)
Structure Length
196.0 Feet (59.7 Meters)
Roadway Width
15 Feet (4.57 Meters)
2 Main Span(s)
Inventory Number

Historic Significance Rating (HSR)
View Information About HSR Ratings

Bridge Documentation

This bridge's future is at risk!

Bridge Status: Slated for demolition and replacement, with county funds!

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

This bridge is a rare surviving example of a bridge built by John Denithorne & Sons, which was based out of Phoenixville, PA. At first glance the bridge appears traditionally composed, however the built-up beams on this bridge are actually very unusual and do not follow the standards of the period. For example, the vertical members at a distance appear to be back-to-back channels with v-lacing, however, they are actually composed of four angles with v-lacing on all four sides, which is uncommon especially for a bridge of this design. Also, toward the bottom of the verticals, there are a series of three battens for the bottom section of the vertical member, which is also unusual. It appears these bottom three battens may have been to guide original pole railings which are today missing, because there are empty holes in the middle of the inside end of each batten. Another unusual built-up beam detail is in the top chord, where instead of a repeating pattern of lattice under the top chord, there are single sets of lattice, essentially in a single X pattern, which are spaced apart from each other. This is an extremely unusual detail. The spacers place inside of the top chord between theses X's appear to be an alteration.

Finally, this bridge is noteworthy for its 15 degree skew. Skewed pin-connected truss bridges are uncommon.

The bridge has been altered, with the replacement of the riveted cover plate with welded plain steel being the most noteworthy, although the loss of original railings is unfortunate as well. Some bottom chord eyebars have been replaced as well. However these alterations have not disturbed the unusual and historically significant details described above, and so the bridge is still considered a significant structure.

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The 2 span, 196'-long, pin-connected Pratt thru truss bridge built in 1893 is supported on a stone substructure. It was fabricated by John Denithorne & Sons of Phoenixville, the details of the bridge, including the verticals, upper sway bracing, and portal bracing, reflect period thinking about truss members. Denithorne was successful marketing his bridges to Chester and Montgomery counties into the 20th century. The bridge has some alterations, but they do not adversely impact its significant details and overall integrity. It is historically and technologically significant because of its association with the Denithorne company and what that illustrates about metal truss bridges were built during the last quarter of the 19th century and for its technological significance.

Discussion of Surrounding Area

The single lane bridge carries a 2 lane road over a stream in a sparsely developed, forested setting. The bridge is adjacent to parkland and altered Bergey family properties, including a mill that was renovated into a dwelling and a renovated dwelling, adjacent to the bridge. The area does not have the integrity or cohesiveness to be a potential historic district.

Bridge Considered Historic By Survey: Yes


Photo Galleries and Videos: Bergeys Mill Road Bridge


View Photo Gallery

Bridge Photo-Documentation

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


View Photo Gallery

Bridge Photo-Documentation

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


View Video

Crossing The Bridge

Full Motion Video
Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.


Maps and Links: Bergeys Mill Road Bridge

Coordinates (Latitude, Longitude):

Search For Additional Bridge Listings:

Bridgehunter.com: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

Bridgehunter.com: View listed bridges within 10 miles (16 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 10 miles (16 kilometers) of this bridge.

2021 National Bridge Inventory: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

Additional Maps:

Google Maps

Google Streetview (If Available)

Bing Maps


GeoHack (Additional Links and Coordinates)

Apple Maps (Via DuckDuckGo Search)

Apple Maps (Apple devices only)


HERE We Go Maps

ACME Mapper

Waze Map

Android: Open Location In Your Map or GPS App

Flickr Gallery (Find Nearby Photos)

Wikimedia Commons (Find Nearby Photos)

Directions Via Sygic For Android

Directions Via Sygic For iOS and Android Dolphin Browser

USGS National Map (United States Only)

Historical USGS Topo Maps (United States Only)

Historic Aerials (United States Only)

CalTopo Maps (United States Only)

Home Top


About - Contact

© Copyright 2003-2023, 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.

Admin Login