HistoricBridges.org Menu: HistoricBridges.org Menu:


We Recommend These Resources:
Bach Steel - Experts at historic truss bridge restoration.
Historic Bridge Finder App: Find Nearby Bridges

HistoricBridges.org: Bridge Browser

Gastown Bridge

Gastown Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: June 1, 2010

View Photos
and Videos
View Maps
and Links

Key Facts

Facility Carried / Feature Intersected
Racetrack Road (TR-690) Over Plum Creek
Location
Rural: Armstrong County, Pennsylvania: United States
Construction Date and Builder / Engineer
1910 By Builder/Contractor: Penn Bridge Company of Beaver Falls, Pennsylvania

Technical Facts

Rehabilitation Date
1984
Main Span Length
97 Feet (29.57 Meters)
Structure Length
102 Feet (31.09 Meters)
Roadway Width
13 Feet (3.96 Meters)
Spans
1 Main Span(s)
NBI Number
3721906900009

Historic Significance Rating (HSR)

Bridge Documentation

This bridge no longer exists!

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

This historic bridge was demolished and replaced in 2011!

Although the historic bridge inventory didn't seem to take notice, this is actually an unusual bridge. It has an unusual riveted curb that extends well below the deck, riveted to the vertical members. Perhaps the curb was designed to stabilize and brace the truss somewhat, in addition to providing the curb function. The bridge also is an uncommon example of a bridge in which the bottom chord is located below the floorbeams, rather than above. Finally, the bridge is noteworthy as an uncommon example of a pin-connected truss bridge with a skew, in the case of this bridge, a 22% skew.

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The ca. 1908, pin connected, single span, 102'-long, Pratt pony truss bridge with the floor beams above the lower chords is supported on ashlar abutments with flared wingwalls. The upper chords and verticals are built up members, and the lower chords and diagonals are eye bars. The bridge, one of nine pin connected truss bridges remaining in Armstrong County, is a late and undistinguished example of its technology. It has no innovative or distinctive details, and it reflects the standardization of the design. Neither the bridge nor its setting is historically or technologically significant.

Discussion of Surrounding Area

The bridge carries a 1 lane unimproved road over a stream in a rural area of active farms and scattered 20th century residences. The setting does not have rural historic district potential.

Bridge Considered Historic By Survey: No

Divider

Photo Galleries and Videos: Gastown 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
Southbound Crossing of the Bridge
Full Motion Video
Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.
View Video
Northbound Crossing of the Bridge
Full Motion Video
Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.

View Maps
and Links

Divider
 
Home Top

Divider

About - Contact

© Copyright 2003-2019, 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.