Astoria–Megler Bridge

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Astoria-Megler Bridge
Carries motor vehicles and bicycles,
2 lanes of US 101
Crosses Columbia River
Locale Astoria, Oregon / Pacific County, Washington, USA
Maintained by Oregon DOT
ID number s0000548
Designer Oregon and Washington transportation departments
Design cantilever through-truss
Material steel
Total length 21,474 feet (6,545 m)
Width 28 feet (8.5 m)
Longest span 1,232 feet (376 m)
Number of spans 8 (main)
33 (approach)[1]
Piers in water 171
Clearance below 196 feet (60 m) at high tide
Construction begin November 5, 1962 (1962-11-05)
Construction end August 27, 1966 (1966-08-27)
Construction cost $24 million
Opened July 29, 1966 (1966-07-29)[2]
Inaugurated August 27, 1966 (1966-08-27)
Toll none (since December 1993)
Daily traffic 7100
Replaces Astoria–Megler Ferry
Coordinates 46°13′02″N 123°51′46″W / 46.21725°N 123.86291°W / 46.21725; -123.86291Coordinates: 46°13′02″N 123°51′46″W / 46.21725°N 123.86291°W / 46.21725; -123.86291

The Astoria–Megler Bridge is a steel girder continuous truss bridge that spans the Columbia River between Astoria, Oregon and Point Ellice near Megler, Washington, in the United States. The span is 14 miles (23 km) from the mouth of the river,[3] and was the last segment of U.S. Route 101 between Olympia, Washington and Los Angeles, California.[4] It is the longest continuous truss bridge in North America.

Contents

[edit] History

See also: Astoria–Megler Ferry

Ferry service between Astoria and the Washington side of the Columbia River began in 1926.[5] The Oregon Department of Transportation purchased the ferry service in 1946. This ferry service did not operate during inclement weather and the half-hour travel time caused delays. In order to allow faster and more reliable crossings near the mouth of the river, a bridge was planned. The bridge was built jointly by the Oregon Department of Transportation and Washington State Department of Transportation.[6]

Construction on the structure began on November 5, 1962. The concrete piers were cast at Tongue Point, 4 miles (6 km) upriver. The steel structure was built in segments at Vancouver, Washington, 90 miles (145 km) upriver, then barged downstream where hydraulic jacks lifted them into place. On August 27, 1966, with more than 30,000 people in attendance, Governors Mark Hatfield of Oregon and Dan Evans of Washington opened the bridge by cutting a ceremonial ribbon. The cost of the project was $24 million, equivalent to $172 million today,[7] and was paid for by tolls that were removed on December 24, 1993, more than two years early.[3]

[edit] Details

Astoria-Megler Bridge from the Astoria side of the Columbia River

The bridge is 21,474 feet (6,545 m) in length[8] and carries one lane of traffic in each direction. The main span is closest to the Oregon side and measures 1,232 feet (376 m) long.[5] The bridge was built to withstand 150 mph (240 km/h) wind gusts and river speeds of 9 mph (14 km/h).[4] As of 2004, an average of 7,100 vehicles per day use the Astoria–Megler Bridge.[9] Designed by William Adair Bugge (July 10, 1900 - November 14, 1992), construction of the cantilever truss bridge was completed by the DeLong Corporation, the American Bridge Company, and Pomeroy Gerwick.[10]

The south end is located at 46°11′14″N 123°51′15″W / 46.18723°N 123.85427°W / 46.18723; -123.85427 (Astoria-Megler Bridge south end) beside what used to be the toll plaza, at the end of a 650-metre (2,130 ft)[11] long inclined ramp which gains elevation to clear the channel over land. The north end is at 46°14′27″N 123°52′30″W / 46.24084°N 123.87493°W / 46.24084; -123.87493 (Astoria-Megler Bridge north end) and connects directly to SR 401. Since most of the northern portion of the bridge is over non-navigable water, it is low to the water.

Pedestrians are prohibited from the bridge[12] except during the annual bridge walk called the "Great Columbia Crossing".[13] Bicycles are permitted on the bridge.[14][15]

Repainting the bridge was planned for May 2009 through 2011 and budgeted at $20,000,000 to be shared by the states of Oregon and Washington.[16] However, a four year planned paint stripping and repainting project is planned for March 2012 through December 2016.[17]

90° panorama of the Astoria-Megler Bridge and twilight-shrouded Astoria, Oregon. Looking southward from Point Ellice on the Washington side of the Columbia River. On the left, the Astoria Column is visible lit with holiday lights. Just right of the column is Saddle Mountain. In the center, between the piers of Astoria-Megler, lies the Youngs Bay Bridge, discernible by its overhead lights and the blur of traffic. The sky displays hues of pink and purple in this early-December photo

[edit] Popular culture

The bridge itself is featured prominently in the movies Short Circuit, Kindergarten Cop, and The Goonies, and represents the doomed fictional Madison Bridge in Irwin Allen's 1979 made-for-TV disaster movie The Night the Bridge Fell Down.

[edit] References

  1. ^ "National Bridge Inventory Database". http://nationalbridges.com/index.php?option=com_lqm&3b30334d78de8f918831483e4b8cfd86=1&task=showResults&query=8&lqm_id=511668&&Itemid=2. Retrieved 2012-02-08. 
  2. ^ "July 29, 1966: Pacific Coast Route Completed With Opening of Astoria-Megler Bridge". http://portland.daveknows.org/2011/07/29/july-29-1966-pacific-coast-route-completed-with-opening-of-astoria-megler-bridge/. Retrieved 2011-11-17. 
  3. ^ a b "Lewis & Clark's Columbia River - 200 Years Later: Astoria-Megler Bridge". http://columbiariverimages.com/Regions/Places/astoria_megler_bridge.html. Retrieved 2011-11-17. 
  4. ^ a b Holstine, Craig E.; Hobbs, Richard (2005). Spanning Washington: Historic Highway Bridges of the Evergreen State. Washington State University Press. p. 100. ISBN 0-87422-281-8. 
  5. ^ a b Astoria-Megler Bridge. Astoria & Warrenton Area Chamber of Commerce. Retrieved on May 14, 2008.
  6. ^ Smith, Dwight A.; Norman, James B.; Dykman, Pieter T. (1989). Historic Highway Bridges of Oregon. Oregon Historical Society Press. p. 299. ISBN 0-87595-205-4. 
  7. ^ Consumer Price Index (estimate) 1800–2008. Federal Reserve Bank of Minneapolis. Retrieved February 22, 2012.
  8. ^ Oregon Coastal Highway Bridges
  9. ^ NBI Structure Number: 07949C009 00241. Nationalbridges.com. Retrieved on May 14, 2008.
  10. ^ Astoria Bridge. Structurae. Retrieved on May 14, 2008.
  11. ^ "Google Maps route". http://maps.google.com/maps?saddr=US-101+N&daddr=US-101+N&hl=en&sll=46.188666,-123.851565&sspn=0.003483,0.008256&geocode=FfLCwAIdOCKe-A%3BFeLOwAId2zWe-A&vpsrc=0&dirflg=w&doflg=ptk&mra=luc&t=h&z=18. Retrieved 2011-11-17. 
  12. ^ Cool Ship Watching Spots On the Lower Columbia
  13. ^ passport2oregon.com: Astoria
  14. ^ Oregon Department of Transportation: Oregon Coast Bike Route
  15. ^ Washington State Department of Transportation: State Highways Sections Closed to Bicycles
  16. ^ "Astoria Megler Bridge Painting". http://www.oregon.gov/ODOT/HWY/REGION2/Astoria_Megler_Bridge_Painting.shtml. Retrieved 2011-11-17. 
  17. ^ "Astoria Megler Bridge Painting - Phase 2". http://www.oregon.gov/ODOT/HWY/REGION2/Astoria_Megler_Bridge_Painting_phase2.shtml. Retrieved 2011-11-17. 

[edit] External links

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