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Post Street Bridge

Post Street Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: August 19, 2014

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Key Facts

Facility Carried / Feature Intersected
Post Street Over Spokane River
Location
Spokane: Spokane County, Washington: United States
Structure Type
Concrete Open Spandrel Deck Arch, Fixed and Approach Spans: Concrete Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1917 By Builder/Contractor: Olson and Johnson Company and Engineer/Design: Morton McCartney

Technical Facts

Rehabilitation Date
1937
Main Span Length
259 Feet (79 Meters)
Structure Length
333 Feet (102 Meters)
Roadway Width
40 Feet (12.19 Meters)
Spans
1 Main Span(s) and 2 Approach Span(s)
NBI Number
85287000000000

Historic Significance Rating (HSR)
View Information About HSR Ratings

Bridge Documentation

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

View Historic Structure Reports For This Bridge

View Historical Articles About The Collapse During Bridge Construction

This bridge has an interesting history. The first bridge at this location was built in 1885 and was a wooden structure. It did not last long: in 1893 is was replaced by an extremely unusual bridge that looked like a metal truss, but was described by its builder, the San Francisco Bridge Company, as a hinged arch bridge. In 1917, an attempt to replace the 1893 bridge took place with the construction of a concrete arch bridge. However, during construction the concrete arch, which was still being supported by wooden falsework, collapsed completely. Another attempt to build a concrete arch bridge was made in the same year and this time was successful, and the bridge opened later that year. In 1937, another major event occurred when the bridge was widened. To widen the bridge, a third arch rib was added. This would have required the replacement of railing on at least one side of the bridge. It is not known if the railing was replaced on just the one side or if it was replaced on both sides. In either case, the railing seen today is the same visual appearance as the original 1917 railing. Additionally, the third arch rib that was added looks very similar to the original arch ribs. As such, the bridge was the victim of a major alteration, but at least the alteration was respective the original bridge design and appearance.

When completed in 1917, this bridge had pin-connected railroad truss bridges that paralleled the bridge on either side. Neither of these bridges exist today.

Above: These photos show the complete collapse of the first attempt to build a concrete arch bridge on Post Street.

The above photos show the bridge being constructed with the falsework still in place. It is not known if this was the first or second attempt to build the arch bridge.

The above photos show the bridge newly completed. These photos make a good comparison to the present-day bridge photos in the photo gallery. Note in these photos the bridge has not been widened and only has two arch ribs. Also note that the original railing looks very similar to the railing seen on the bridge today.

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Photo Galleries and Videos: Post Street Bridge

 
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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

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Maps and Links: Post Street Bridge

Coordinates (Latitude, Longitude):

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Bridgehunter.com: View listed bridges within a half mile of this bridge.

Bridgehunter.com: View listed bridges within 10 miles of this bridge.

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USGS National Map (United States Only)

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