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| Key Facts |
| Bridge Name | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date and Builder/Engineer | |
|---|---|---|---|---|---|
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McKees Rocks Bridge
| Blue Belt (PA-3104) Over Ohio River, Railroad, and Various Streets | McKees Rocks: Allegheny County, Pennsylvania | Metal Two-Hinged Braced Ribbed Through Arch, Fixed and Approach Spans: Metal Solid Ribbed Deck Arch, Fixed | 1931 By Builder/Contractor: Fort Pitt Bridge Works of Pittsburgh, Pennsylvania and Engineer/Design: Allegheny County Department of Public Works |
| Technical Facts |
| Rehabilitation Date | Main Span Length | Structure Length | Roadway Width | Main Spans | Approach Spans | NBI Number |
| 1987 | 750 Feet (228.6 Meters) | 5900 Feet (1798.3 Meters) | 40 Feet (12.2 Meters) | 1 | 21 | 23104003000000 |
The McKees Rocks Bridge is one of the most unique bridges in a county filled with some of the most unique bridges in the
country. www.PGHbridges.com calls
this bridge a "pattern book on bridge types" and that could not be closer to the
truth. The very long bridge stands out because of its variety of span types. The main span over the Ohio River is a braced rib through arch, often also called a "trussed" through arch. This is flanked by spandrel braced deck arch spans.
West of all these spans are a series of Warren deck truss spans, that lead the bridge down to a concrete causeway-like structure that has a couple openings that function as grade separations. South of that somewhat unremarkable section of
the bridge is the final set of spans, a pair of rare "crescent" arch spans. These spans are braced rib through arches, but the crescent name refers to how at the ends of the spans, the top and bottom chords of the arch rib come together,
and essentially at the ends of the arch ribs, the ribs are solid ribbed as opposed to braced rib.
The variety of the spans on this bridge are what makes this bridge particularly noteworthy and significant. While the main steel arch span is significant, in some ways, the crescent arch spans are almost more significant because their design is more rare. To make a long story short, many of this bridge's spans would be significant historic bridges even if they were on their own as a single bridge, but together as one monumental bridge this is a very noteworthy historic bridge.
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.
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Bridge Photo-Documentation
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. |
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Bridge Photo-Documentation
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
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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 |
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Eastbound Crossing 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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