Cape Creek Bridge

Cape Creek Bridge is an arch bridge that spans Cape Creek in Lane County, Oregon, United States. The bridge carries U.S. Route 101. Opened in 1932, it was designed by noted bridge engineer Conde McCullough and built of reinforced concrete by John K. Holt.[1][2] The total length of the bridge is 619 feet (188.6 m), with a main span of 220 feet (67 m).[1] The bridge resembles a Roman aqueduct, with a single parabolic arch that spans half its length.[2] It was listed as Cape Creek Bridge No. 01113 on the National Register of Historic Places in 2005, as part of the McCullough, C.B., Major Oregon Coast Highway Bridges MPS (Multiple Property Submission).

Cape Creek Bridge No. 01113
Location US 101
Built1932
ArchitectConde B. McCullough
MPSC. B. McCullough Major Oregon Coast Highway Bridges, 1927-1936 MPS
NRHP reference No.05000820
Added to NRHP2005
Cape Creek Bridge, Oregon

Corrosion protection

The Cape Creek Bridge has been impressed-current cathodically protected (ICCP) from corrosion since 1991. Rebar in concrete is highly susceptible to corrosion by chloride ions from seawater and de-icing salts. Contractors to the Oregon Department of Transportation have plasma-sprayed 102,000 square feet (9,500 m2) of 0.020-inch (0.5 mm) thick zinc onto the exposed concrete to provide a sacrificial anode that corrodes in lieu of the steel rebar.[3][4][5][6]

See also

References
  1. Hadlow, Robert W. (2001). Elegant Arches, Soaring Spans: C. B. McCullough, Oregon's Master Bridge Builder. Corvallis, Oregon: Oregon State University Press. ISBN 0-87071-534-8.
  2. Style & Vernacular: A Guide to the Architecture of Lane County, Oregon. Western Imprints, The Press of the Oregon Historical Society. 1983. p. 151. ISBN 0-87595-085-X.
  3. "Cape Creek Bridge Cathodic Protection Operating Data: 1992-94," Oregon Dept. of Transportation Report, 1995.
  4. R. Brousseau, M. Arnott & B. Baldock, "Laboratory Performance of Zinc Anodes for Impressed Current Cathodic Protection of Reinforced Concrete'" Corrosion 51, 8 (Aug 1995): p 639-644.
  5. B.S. Covino, Jr., S.J. Bullard, G.R. Holcomb, S.D. Cramer, G.E. McGill, and C.B. Cryer, "Bond Strength of Electrochemically Aged Arc-Sprayed Zinc Coatings on Concrete," Corrosion 53, 5 (May 1997): p 399-411.
  6. G.R. Holcomb, B.S. Covino, Jr., J.H. Russell, S.J. Bullard, S.D. Cramer, W.K. Collins, J.E. Bennett and H.M. Laylor, "Humectant Use in the Cathodic Protection of Reinforced Concrete," Corrosion 56, 11 (Nov 2000): p 1140-1157.


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