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Conde B. McCullough

of Redfield, South Dakota
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Conde Balcom McCullough (1887-1946) was the notable State Bridge Engineer for the Oregon State Highway Department from 1919 to 1935. During McCullough’s tenure as bridge engineer, Oregon developed one of the most impressive collections of beautiful and efficient bridge in the United States.

McCullough began his career designing bridges under another notable engineer, James B. Marsh and his Marsh Engineering Company. After a year working for Marsh, McCullough joined the Iowa State Highway Commission where he developed bridge design standards and assisted in designing bridge throughout Iowa. During this time McCullough served as an expert witness during patent infringement lawsuits between Daniel Luten and Marsh.

McCullough was appointed the Oregon State Bridge Engineer in 1919 after a short stint at Oregon Agricultural College as a professor. As the State Bridge Engineer for the Oregon State Highway Department, McCullough brought forth a three part philosophy to bridge design. His three major points were 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 is most widely known for his work with reinforced concrete arch bridges. McCullough assisted in pioneering different design and construction methods in concrete arch construction, along with writing text books on the subject of concrete arch design. Some of his most notable reinforced concrete arch bridges include the Rogue River Bridge in Gold Beach and the Winchester Bridge in Roseburg.

McCullough’s most recognizable accomplishment was managing the design and construction of the bridges on the Oregon Coast Highway. Over the course of two years McCullough’s staff completed the design and construction of five major coastal crossing all measuring between 1600 to 5400 feet in length. The bridges were designed with many of the architectural details that have made McCullough’s bridge some of the most beautiful in the world.

After the completion of the coastal bridges McCullough left Oregon to design bridges on the Pan-American Highway in Central America for the Bureau of Public Roads. McCullough gave up his position as state bridge engineer but upon his return he served Oregon as the Assistant Highway Engineer until is untimely death in 1946.

The legacy McCullough left still lives in the design and maintenance of Oregon Bridges. Oregon is one of the leaders in historic bridge preservation along with creating innovative and eye pleasing structures to replace aging structures of McCullough's era. In 1947 the longest of McCullough’s coastal bridges, the Coos Bay Bridge in North Bend was dedicated the Conde McCullough Memorial Bridge in honor of McCullough.

ENGINEERING HISTORY:

- Bridge Designer, Marsh Engineering Company (1910-1911)

- Bridge Engineer, Iowa State Highway Commission (1911-1916)

- Assistant Professor, Oregon Agricultural College (1916-1919)

- State Bridge Engineer, Oregon Highway Department (1919-1936)

- Bridge Engineer, U.S. Bureau of Public Roads, Pan-Am Highway (1936-1937)

- Assistant State Highway Engineer, Oregon Highway Department (1932-1946)

CONDE B. MCCULLOUGH INFORMATION:

Wikipedia: http://en.wikipedia.org/wiki/Conde_McCullough

Oregon Coastal Bridge Brochure: http://www.oregon.gov/ODOT/HWY/GEOENVIRONMENTAL/docs/Histori...

SOURCES:

Elegant Arches Soaring Spans, Robert W. Hadlow, OSU Press, 2001

Historic Highway Bridges of Oregon, Dwight A. Smith, Oregon Historic Society Press, 1989


Sherars Bridge (1922) (Wasco County, Oregon)
Bridge Engineer, 1922
Lost Warren deck truss bridge over Deschutes River on OR 216
Replaced by new bridge

Siltcoos River Bridge (Lane County, Oregon)
State Bridge Engineer, 1930
Concrete tee-beam bridge over Siltcoos River on US 101
Open to traffic

Siuslaw River Bridge (Lane County, Oregon)
Bridge Engineer, 1936
Bascule bridge over Siuslaw River on US 101 in Florence
Open to traffic

Skiberene Bridge (Clatsop County, Oregon)
Bridge Engineer, 1930
Concrete deck girder bridge over Necanicum River on U.S. 101/U.S. 26
Open to traffic

Soapstone Creek Bridge (Clatsop County, Oregon)
Bridge Engineer, 1928
Concrete arch bridge over Soapstone Creek on OR 53
Open to traffic

South Slough Bridge (1934) (Coos County, Oregon)
Bridge Engineer, 1934
Lost through truss swing span bridge over South Slough on Cape Arago Highway
Replaced by a new bridge

South Yamhill River Bridge (Yamhill County, Oregon)
Bridge Engineer, 1929
Concrete deck girder bridge over South Yamhill River on OR 22
Open to traffic

Spanish Hollow Bridge (Sherman County, Oregon)
Bridge Engineer, 1935
Concrete stringer bridge over Spanish Hollow Creek on Biggs-Rufus Highway (Old U.S. 30) in Biggs
Open to traffic

Springfield Bridge (Lane County, Oregon)
Bridge Engineer, 1929
Continuous Warren through truss bridge over Willamette River on Westbound OR 126 in Springfield
Open to traffic

Storm Creek Bridge (Carroll County, Iowa)
Consulting Engineer for ISHC, 1913
Lost pony truss bridge over Storm Creek on 190th
Replaced by a new bridge

Stout Creek Bridge (Marion County, Oregon)
Built 1926
Concrete tee beam bridge over Stout Creek on Ferry Road SE (Old OR-22)
Open to traffic

Tenmile Creek Bridge (Lane County, Oregon)
Bridge Engineer, 1931
Rainbow arch bridge over Tenmile Creek on US 101
Open to traffic

Tide Creek Bridge (Columbia County, Oregon)
Bridge Engineer, 1920
Stringer bridge over Tide Creek on U.S. 30 Frontage Road
Open to traffic

Tualatin River Bridge (Washington County, Oregon)
Bridge Engineer, 1929
Warren deck truss bridge over Tualatin River on OR 99W SB in Tualatin
Open to traffic

Tucker Bridge (Hood River County, Oregon)
Bridge Engineer, 1932
Concrete arch bridge over Hood River on HWY 281
Open to traffic

Umatilla River Bridge (Umatilla County, Oregon)
1925 Bridge Engineer, 1925
Concrete arch bridge over Umatilla River on US 730 in Umatilla
Open to traffic

Umpqua River Bridge (Douglas County, Oregon)
Bridge Engineer, 1936
Swing bridge over Umpqua River on US 101 in Reedsport
Open to traffic

Unity Overcrossing (Baker County, Oregon)
1922 - Bridge Engineer, 1922
Concrete tee beam bridge over Union Pacific Railroad on Old US 30
Open to traffic

Upper Perry Arch Bridge (Union County, Oregon)
Bridge Engineer, 1924
Arch bridge over Grande Ronde River and U.P.R.R. on Old U.S. 30
Open to traffic

US-30 Eastgate Viaduct (Umatilla County, Oregon)
Bridge Engineer, 1937
Stringer bridge over Pendleton Eastgate Viaduct on US-30 in Pendleton
Replaced by a new bridge in 2001

Wilson River Bridge (Tillamook County, Oregon)
Bridge Engineer, 1931
Reinforced concrete tied arch bridge over Wilson River on US 101
Open to traffic

Winchester Bridge (Douglas County, Oregon)
Bridge Engineer, 1923
Concrete arch bridge over North Umpqua River on OR 99
Open to Traffic

Winston Bridge (Douglas County, Oregon)
Bridge Engineer, 1934
Steel through arch bridge over South Umpqua River on Eastbound OR 42
Open to traffic

Wolf Creek Bridge (Josephine County, Oregon)
Bridge Engineer, 1921
Stringer bridge over Wolf Creek on Edgewood Road (Old US-99) in Wolf Creek
Open to traffic

Yaquina Bay Bridge (Lincoln County, Oregon)
Bridge Engineer, 1936
Steel through arch bridge over Yaquina Bay on US 101 in Newport
Open to traffic

Youngs Bay Bridge (Old) (Clatsop County, Oregon)
Bridge Engineer, 1921
Bascule lift bridge over Youngs Bay on US 101 Bus.
Open to traffic