Historic Bridges of the U.S. | Dyreson Road Bridge

Overview

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Photos

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West Approach

Photo taken by J.R. Manning in September 2008

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West Portal

Photo taken by J.R. Manning in September 2008

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Manufacturer's Plate

Well, that's where it was, anyway, unless this is another bridge by the obscure Two Holes In Span Bridge Co.

Photo taken by J.R. Manning in September 2008

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Deck and Truss Structrure

Looking east.

Photo taken by J.R. Manning in September 2008

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Barrel Shot Looking West

Photo taken by J.R. Manning in September 2008

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Eyebar Detail

South side of bridge.

Photo taken by J.R. Manning in September 2008

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Lower Chord Detail

South side of bridge.

Photo taken by J.R. Manning in September 2008

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Mounting Shoe

Southeast quadrant. The bridge is listed as having a fixed mount on the west end. This end uses roller nest expansion bearings.

Photo taken by J.R. Manning in September 2008

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Lower chord to floor beam connections

Photo taken by J.R. Manning in September 2008

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View Of Upper Chord Connection

Photo taken by J.R. Manning in September 2008

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Portal Bracing

Photo taken by J.R. Manning in September 2008

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Deck detail

The deck is wood with an asphalt overlay.

Photo taken by J.R. Manning in September 2008

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Web detail

Photo taken by J.R. Manning in September 2008

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Unusual Detail

If anyone has a clue as to why two top braces have wood attached to them with U-bolts, please let us know.

Photo taken by J.R. Manning in September 2008

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Facts

Overview: Pinned Pratt through truss bridge over Yahara River on E. Dyreson Road
Location: Town of Dunn, Dane County, Wisconsin
Status: Open to traffic
History: Built 1897; rehabilitated 1983
Builder: - Milwaukee Bridge & Iron Co.
Design: Single-span, pinned connection, Pratt through truss, significant for its connection to the Milwaukee Bridge & Iron Company, one of the most prolific fabricators in Wisconsin with many installations in Wisconsin and Iowa, and as far away as Colorado and Texas.
Dimensions: Length of largest span: 124.0 ft.
Total length: 127.3 ft.
Deck width: 14.4 ft.
Vertical clearance above deck: 14.7 ft.
Approximate latitude, longitude: +42.98810, -89.27865 (decimal degrees)
42°59'17" N, 89°16'43" W (degrees°minutes'seconds")
Approximate UTM coordinates: 16/314231/4762012 (zone/easting/northing)
Inventory number: BH 34724 (Bridgehunter.com ID)
Inspection (as of 08/2006): Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 25.8 (out of 100)
Average daily traffic (as of 2004): 100

Update Log

September 20, 2008: New photos from J.R. Manning

Sources

J.R. Manning - thekitchenguy [at] sbcglobal [dot] net

Comments

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