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Conde B. McCullough Memorial Bridge

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Conde B. McCullough Bridge

from the southwest

Photo taken by Michael Goff on August 2, 2009

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Facts 

Overview
Steel cantilevered through truss bridge over Coos Bay on US 101 in North Bend
Location
North Bend, Coos County, Oregon
Status
Open to traffic
History
Built 1936, Rehabilitation 2008
Builders
- American Bridge Co. of New York (Fabricator)
- Conde B. McCullough of Redfield, North Dakota (Lead Bridge Engineer)
- Dexter Smith (Design Engineer - Approach Spans)
- Hamilton Construction of Springfield, Oregon (2008-2011 South Approach Rehabilitation Contractor)
- Mats O. Halvardson (Rehabilitation Design Engineer)
- Northwest Roads (Contractor)
- Raymond Archibald (Design Engineer - Cantilever Spans)
- Virginia Bridge & Iron Co. of Roanoke, Virginia (Contractor) [also known as Virginia Bridge Co.]
Design
The 5305-foot long Conde B. McCullough Memorial Bridge is a steel continuous cantilevered half-through truss with bracing above and below the deck. The cantilever design was adopted because high volumes of shipping made a draw span undesirable. Also, the wide shipping channel and high banks of both sides dictated a high-level bridge. The steel truss is 1708-feet long with the central portion being 793-feet and the anchor portions being 457.5-feet each. The top and bottom chords of the truss are curved in outline. The sway bracing is also curved, giving an impression of a series of Gothic arches as one travels through the truss.
Thirteen reinforced concrete deck arch spans with open spandrels flank the cantilevered spans, seven on the north side and six on the south side. The two lengths of arch approach spans total 2762-feet, with individual spans ranging from 151-feet to 265-feet in length. Reinforced concrete deck girder spans approach the arch spans. There are nine spans on the north end and five on the south. Ornate concrete abutments at each end of the bridge allow space along the road for travelers to pull over. The abutments also feature staircases that lead down under the bridge.
(HAER OR-46)
Dimensions
Length of largest span: 793.0 ft.
Total length: 5,323.0 ft. (1.0 mi.)
Deck width: 27.0 ft.
Vertical clearance above deck: 16.9 ft.
Recognition
Posted to the National Register of Historic Places on August 5, 2005
Also called
Coos Bay Bridge
Approximate latitude, longitude
+43.42652, -124.22224   (decimal degrees)
43°25'35" N, 124°13'20" W   (degrees°minutes'seconds")
Approximate UTM coordinates
10/401068/4808906 (zone/easting/northing)
Quadrangle map:
North Bend
Inventory numbers
NRHP 05000817 (National Register of Historic Places reference number)
OR 01823 (Oregon Dept. of Transportation structure number)
BH 29925 (Bridgehunter.com ID)
Inspection (as of 05/2013)
Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 48.5 (out of 100)
Average daily traffic (as of 2010)
14,700

Update Log 

  • October 11, 2014: New photos from Royce and Bobette Haley
  • March 9, 2014: Photos imported by Dave King
  • November 28, 2011: New photo from Michael Goff
  • April 19, 2010: New Street View added by Michael Goff
  • April 13, 2010: New Street View added by Nathan Holth
  • August 4, 2009: New photos from Michael Goff
  • April 19, 2009: Posted HAER photos
  • July 30, 2008: New photos from Michael Goff
  • July 14, 2008: Updated by Michael Goff
  • June 12, 2008: Updated by Michael Goff

Related Bridges 

Sources 

Comments 

Conde B. McCullough Memorial Bridge
Posted May 29, 2014, by Scott Gavin (trainnut1956 [at] charter [dot] net)

Everybody I know calls it the Coos Bay Bridge, even though it was renamed in honor of Mr. McCullough back in 1947. The man designed some very beautiful bridges. Sadly, the bridges are reaching the end of their lifespans because, especially on coastal highway, the rusting and expanding metal rebar inside the concrete supports have been causing the concrete to crack and split. ODOT has been forced to engage in heroic efforts to try to restore and rehabilitate some of Conde's bridges, including experimental methods of running electrical currents through the rebar to slow or stop corrosion, and I understand that in many cases the restoration efforts cost many more times the original cost of the bridge. The Alsea Bay bridge was too far gone to be saved and was replaced by a modern structure built in a style similar to the original, and near here at Klamath Falls, there were two Conde McCollough bridges. The one at Spring Creek was replaced by a larger bridge of similar design to the original, while the OC&E overpass was replaced by a new bridge, which was supposed to have railings designed to match the original but due to cost concerns, this promise was not fulfilled.

Conde B. McCullough Memorial Bridge
Posted November 7, 2013, by Dave Bradley (buisyfixerupper [at] hotmail [dot] com)

I love what I saw when my wife and I drove over that bridge. They are fixing/replacing the railings with authentic reproductions of the cathedral style railings. This is the bridge that will outlive all the other coastal bridges. Thank you to ODOT for the preservation efforts here!

Conde B. McCullough Memorial Bridge
Posted January 30, 2010, by Chalon Harper (camowolf95 [at] live [dot] com)

Elegant Arches,Soaring Spans is a really informative book and is a super memorial to a man who gave us such artwork in his engineering that he deserves a place in history,and this bridge is a wonderful memorial to him as well.

I have a cousin who has family in this area,and I will ask her to send me pictures.

Conde B. McCullough Memorial Bridge
Posted August 6, 2009, by MikeInPdx (mikeinpdx13 [at] yahoo [dot] com)

Oregon isn't perfect with their historic bridges, but we take care of them better than many states.

Michael Goff's photography and work here documenting Oregon's bridges is AMAZING. Thank you for bringing so many of these places to life for everyone.

Mike

Conde B. McCullough Memorial Bridge
Posted April 23, 2009, by Anthony Dillon (spansaver [at] hotmail [dot] com)

A thing of beauty....Indeed!

Conde B. McCullough Memorial Bridge
Posted April 23, 2009, by Randy Libner (rlibner [at] hotmail [dot] com)

Who could get ever get tired of looking at this bridge?

Conde B. McCullough Memorial Bridge
Posted July 24, 2008, by Michael Goff

The Conde B. McCullough Bridge is named in honor of the lead engineer. There are a couple of reasons for this...

1.The McCullough Legacy:

C.B. McCullough was the state bridge engineer for Oregon from 1919 to 1935. Under his watch many of the key spans on Oregon early highways were designed and constructed. His philosophy to bridge design was to make the structure fit the site in which it was being built, have the bridge be cost effective, and finally he emphasized building structures that were pleasing to the eye.

McCullough assisted in pioneering different design and construction methods in concrete arch construction, along with building a solid reputation for the Oregon Highway Department. The legacy he left still lives in the design and maintenance of Oregon Bridges (with the notable acceptation of the interstate system). Oregon is one of the leaders in historic bridge preservation along with creating innovative and eye pleasing structures to replace aging structures.

2.Final Bridge:

The Coos Bay crossing was the last and largest bridge McCullough designed while the state bridge engineer. The bridge also completed the Oregon portion of the Pacific Coast Highway. He accepted a post in Central America designing bridges on the Pan-American Highway in 1935 and had to leave the Oregon Highway Department.

There is a great book written by Robert Hadlow called

"Elegant Arches, Soaring Spans"

It is a biography about Conde McCullough, and the bridges he worked on.

Conde B. McCullough Memorial Bridge
Posted July 14, 2008, by Todd (hippiewalk [at] yahoo [dot] com)

I am impressed with how well Oregon takes care of their historic bridges. Many are shown in this website as being primarily in awsome shape. My homestate chooses the cutting torch then pouring concrete later instead of saving historic bridges. What a shame.

Conde B. McCullough Memorial Bridge
Posted July 14, 2008, by J.R. Manning (thekitchenguy [at] sbcglobal [dot] net)

What a beautiful structure - I love the Art Deco details included. How did the lead designer and the bridge happen to have the same name?