Cape Creek Bridge: Difference between revisions

▲'''Cape Creek Bridge''' is an [[arch bridge]] that spans Cape Creek in [[Lane County, Oregon]], United States. The bridge carries [[U.S. Route 101 in Oregon|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.<ref name=Hadlow>{{cite book |author= Hadlow, Robert W. |title= Elegant Arches, Soaring Spans: C. B. McCullough, Oregon's Master Bridge Builder |location= Corvallis, Oregon |publisher= [[Oregon State University Press]] |year= 2001 |isbn= 0-87071-534-8}}</ref><ref name=Style>{{cite book |title= Style & Vernacular: A Guide to the Architecture of Lane County, Oregon |publisher= Western Imprints, The Press of the Oregon Historical Society |year= 1983 |page= 151 |isbn= 0-87595-085-X}}</ref> The total length of the bridge is 619 feet (188.6 m), with a main span of 220 feet (67 m).<ref name=Hadlow/> The bridge resembles a [[Roman aqueduct]], with a single [[Parabola|parabolic]] arch that spans half its length.<ref name=Style/> 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]]).

▲==Corrosion Protection==

▲The Cape Creek Bridge has been impressed-current [[Cathodic protection|cathodically protected]] (ICCP) from [[corrosion]] since 1991. [[Rebar]] in concrete is highly susceptible to corrosion by [[chloride]] ions from [[seawater]] and [[De-ice|de-icing salts]]. Contractors to the [[Oregon Department of Transportation]] have [[Thermal spraying|plasma-sprayed]] 9500 m² of 0.5-mm thick [[zinc]] onto the exposed concrete to provide a [[Galvanic anode|sacrificial anode]] that corrodes in lieu of the steel rebar.<ref>“Cape Creek Bridge Cathodic Protection Operating Data: 1992-94,” Oregon Dept. of Transportation Report, 1995.</ref><ref>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.</ref><ref>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.</ref><ref>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.</ref>

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