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Colonel John Joseph Tominac Memorial Bridge

Colonel John Joseph Tominac Memorial Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: June 1, 2010

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Key Facts

Location
Johnstown: Cambria County, Pennsylvania: United States
Structure Type
Metal Bolt-Connected Pennsylvania Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1958 By Builder/Contractor: Unknown and Engineer/Design: Peth and Reed of Pittsburgh, Pennsylvania

Technical Facts

Rehabilitation Date
1997
Main Span Length
480 Feet (146 Meters)
Structure Length
934 Feet (285 Meters)
Roadway Width
42.3 Feet (12.89 Meters)
Spans
2 Main Span(s) and 3 Approach Span(s)
NBI Number
11027102600791

Historic Significance Rating (HSR)

Bridge Documentation

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

This bridge is a very late example of a truss bridge in Pennsylvania. It is also an unusually large truss bridge for one that does not span one of Pennsylvania's larger rivers. The bridge has two main truss spans, one is a smaller Parker truss span and the other is a large Pennsylvania truss span. Aside from the size of the Pennsylvania truss span, the bridge is a traditionally composed example of a 1950s-1960s truss bridge. Typical of 1950s-1960s truss construction, the bridge has built-up beams that include plates with oval cutouts, in place of the v-lacing and lattice that was traditionally used up until this period in history. During this period, v-lacing and lattice would often still be used for lighter members, which is apparent in this bridge, which has built-up bracing members with lattice. Also typical for the period, the bridge still uses rivets for the built-up beams, but all field connections are bolted.

This bridge received low National Bridge Inventory ratings for deck geometry, and is also listed as functionally obsolete. The bridge has a very wide deck for a two-lane bridge, and so it should not be considered obsolete in terms of width. It may be that these low ratings are because of the strong camber the bridge has, which makes it difficult to see oncoming traffic. However, this issue is not really a major issue because the bridge deck is wide enough for two trucks to easily pass by each other on the bridge. In addition, some sort of curb or barrier could be installed at the centerline to divide traffic for increased safety, if someone really felt it was a problem.

Because the active Historic Bridge Inventory in Pennsylvania dates to 1996, this bridge did not at that time meet the 50 year threshold for being evaluated. However, the bridge is today over 50 years old and needs to be evaluated for potential National Register eligibility. As of 2010, it is doubtful the bridge would be evaluated as eligible. However if PennDOT follows through with plans to demolish some of the longest examples of simple truss spans in the state, it would move this bridge's 480 foot truss span to become among the longest simple span trusses in Pennsylvania, and it might gain eligibility.

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Photo Galleries and Videos: Colonel John Joseph Tominac Memorial 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
Westbound 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
Eastbound 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.

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Maps and Links: Colonel John Joseph Tominac Memorial Bridge

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