Cape Creek Bridge

Cape Creek Bridge
	The Cape Creek Bridge 2005
use	US Highway 101
Crossing of	Cape Creek
place	Lane County , Oregon
construction	Arch bridge
overall length	189 m
Longest span	67 m
opening	1932
planner	Conde McCullough
	location

44.133519444444 -124.12216944444Coordinates: 44 ° 8 ′ 1 ″ N , 124 ° 7 ′ 20 ″ W.

The Cape Creek Bridge is an arch bridge in Lane County , on the coast of Oregon in the United States . The two-lane road bridge is part of US Highway 101 and is operated by the Oregon Department of Transportation (ODOT). It was designed by Conde McCullough for the Oregon Coast Highway in the early 1930s and spans Cape Creek , which comes from the Siuslaw National Forest and flows into the Pacific between Heceta Head and Devil's Elbow .

history

Heceta Head on the Pacific coast with the historic lighthouse and mouth of Cape Creek in front of Devil's Elbow (right), with the bridge of the same name in between.

The Arch Bridge is one of over 30 reinforced concrete bridges that Conde McCullough built for the Oregon State Highway Department between 1919 and 1936. When the Oregon Coast Highway was built , the stretch between Heceta Head , named after the Spanish navigator Bruno de Heceta , and the Sea Lion Caves south of it , was one of the most complicated and expensive sections. In addition to building the roads in this rugged area, the Devil's Elbow headland had to be tunneled through, to which the bridge over Cape Creek connects and connects to Heceta Head . The Cape Creek Bridge designed McCullough in the design of a Roman aqueduct and oriented themselves thereby at the Pont du Gard in France. Construction began in April 1931 by John K. Holt of Salem and Clackamas Construction Company of Oregon City and was completed in April of the following year.

Despite the first structural problems that arose after the opening and the resulting minor repairs, almost no repair work was carried out on the bridge until the early 1980s. Over the years, however, the coastal location led to accelerated damage to the concrete and to exposure and corrosion of the reinforcing steel . 1984 first repairs were at the joints performed and 1987 investigations on the applicability of cathodic protection started systems of reinforced concrete bridges by ODOT. 1990–1991 over 700 m² of concrete surface was renewed at Cape Creek Bridge and the bridge construction was provided with a zinc coating on an area of over 10,000 m² by means of thermal spraying , which functions as an active sacrificial anode and, in conjunction with a power source, an ICCP system (impressed current cathodic protection) .

The bridge was added to the National Register of Historic Places in 2005 (NRHP #: 05000820) and between 2013 and 2014 repairs were made to the concrete and the cathodic protection system, and the railing of the bridge was renewed.

description

View from below of the arch of the Cape Creek Bridge , 2005.

The main arch of the bridge spans Cape Creek with 67 m and reaches the highest point about 30 m above the creek. The 7.6 m wide arch is flanked on both sides by a two-story viaduct , which in the lower area consists of six full 12.2 m arches on the north side and two on the south side (the outer one is 12.5 m) on each of which two 6.1 m arches are placed on the top. The total of 28 upper arches are 12.2 m high. Due to the inclination of the bridge of 3.5 °, the height of the lower part is reduced from around 21 m on the south side to less than 18 m on the north side. The bridge is completed with a further 9 m wide arch in the upper area and has a total length of 188.7 m.

The entire construction rests on 13 pairs of pillars. Eight foundations were built on rock and the five on softer ground, including the north side of the main arch, were stabilized by pile foundations . The carriageway has a width of 8.2 m between the curbs and is supplemented by 1 m walkways on each side, which are closed with a railing, which is also made of concrete and consists of six fields decorated with ornaments per upper arch .

Web links

Commons : Cape Creek Bridge - Collection of Images, Videos, and Audio Files

Cape Creek Bridge, Spanning Cape Creek at Oregon Coast Highway, Florence, Lane County, OR. Historic American Engineering Record, HAER OR-41.
DESCRIPTION OF HISTORIC AND SCENIC HIGHWAYS - Cape Creek Bridge. Oregon Historic and Scenic Highway Program, State of Oregon.

Individual evidence

^ ^A ^b Robert W. Hadlow: Cape Creek Bridge. Historic American Engineering Record, HAER No. OR-41, Washington, DC 1992.
↑ ^a ^b ^c ^d ^e ^f Robert W. Hadlow: Cape Creek Bridge No. 01113 - National Register of Historic Places Registration Form. United State Department of the Interior, National Park Service, 2004.
↑ Bruce Johnson, Frank Nelson: MANAGEMENT OF COASTAL BRIDGES USING CATHODIC PROTECTION AND STAINLESS STEEL REINFORCING BARS. Oregon Department of Transportation (ODOT). Retrieved August 12, 2017.
^ Cape Creek Bridge Rehabilitation Project (1990-91). GREAT WESTERN CORPORATION. Retrieved August 12, 2017.
↑ US101 Cape Creek Bridge Rehabilitation. Hamilton Construction Company. Retrieved August 12, 2017.

[HAER-1] A ^b Robert W. Hadlow: Cape Creek Bridge. Historic American Engineering Record, HAER No. OR-41, Washington, DC 1992.

[NRHP-2] ↑ ^a ^b ^c ^d ^e ^f Robert W. Hadlow: Cape Creek Bridge No. 01113 - National Register of Historic Places Registration Form. United State Department of the Interior, National Park Service, 2004.

[3] Bruce Johnson, Frank Nelson: MANAGEMENT OF COASTAL BRIDGES USING CATHODIC PROTECTION AND STAINLESS STEEL REINFORCING BARS. Oregon Department of Transportation (ODOT). Retrieved August 12, 2017.

[4] Cape Creek Bridge Rehabilitation Project (1990-91). GREAT WESTERN CORPORATION. Retrieved August 12, 2017.

[5] US101 Cape Creek Bridge Rehabilitation. Hamilton Construction Company. Retrieved August 12, 2017.