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Lincoln Avenue Bridge

Lincoln Avenue Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: August 24, 2014

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Key Facts

Facility Carried / Feature Intersected
Lincoln Avenue Over Puyallup River
Location
Tacoma: Pierce County, Washington: United States
Structure Type
Metal 8 Panel Rivet-Connected Warren Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1929 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
1944
Main Span Length
170 Feet (51.8 Meters)
Structure Length
466 Feet (142 Meters)
Roadway Width
30 Feet (9.14 Meters)
Spans
3 Main Span(s) and 1 Approach Span(s)
NBI Number
85015000000000

Historic Significance Rating (HSR)
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Bridge Documentation

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

This bridge is in general a traditional example of a multi-span rivet-connected through truss. However it is configured unusually since each span is a little different. Details observed are as follows.

Southwest Span:
This bridge has six panels and about a 130 foot span. Key details to note in the design of the bridges beams include the top chord and end post which have flanges facing inward giving those beams a flat exterior appearance with gusset plates that are nearly flush with the top chord and end post. (strut) portion. Finally, note that the diagonal members and vertical members all feature lattice.

Middle Span:
Like the southwest span, this bridge has six panels and about a 130 foot span. However the composition of beams is different. The diagonal members and vertical members all feature v-lacing instead of lattice. Moreover, the hip vertical and end diagonals have neither v-lacing or lattice.
6 panels. Also, unlike the southwest span, the top chord and end post have flanges that face outward, which visually give the gussett plates a recessed appearance.

Northeast Span:
Even though traditionally the central span is the largest span on a multi-span bridge, that is not the case here. The northeast span is larger than the other two and consists of 8 panels providing a 170 foot span. This span has a top chord and end post matching the middle span. However the vertical members and diagonal members differ because none of them have any v-lacing or lattice.

It is not surprising that the longer span might have details that differ from a shorter span. However, the southwest and middle spans have the same span length, so the difference in details is unusual. It is unclear what the story is here. The National bridge Inventory gives a rehabilitation date of 1944, less than 20 years after the 1929 construction date. Perhaps in 1944 one of the spans (likely the southwest span) was destroyed in some disaster and replaced? It is unclear.

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Photo Galleries and Videos: Lincoln Avenue Bridge

 
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Bridge Photo-Documentation
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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: Lincoln Avenue Bridge

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