Main Street Bridge (Hillsboro, Oregon)
Main Street Bridge Carries light rail Crosses Main Street & 18th Avenue Locale Hillsboro, Oregon
Maintained by TriMet Design concrete arch/tied-arch Total length 425 feet (130 m) Width 34 feet (10.3 m) Height 75 feet (arch) Opened 1997 Coordinates Coordinates: 
Main Street Bridge is a tied concrete arch bridge located in Hillsboro, Oregon, United States. The bridge carries light rail traffic over Main Street and 18th Street on TriMet’s MAX Blue Line that runs from Gresham to Hillsboro. Completed in 1997, the 425-foot (130 m) long bridge was built with a 78-foot (24 m) tall arch in the center. It is located between the 12th Avenue Station and the Fair Complex Station.
The bridge is a post-tension box girder structure with the center pier as an arch support straddling the road. Used in lieu of a center support, the arch is 110 feet (34 m) wide and 75 feet (23 m) tall. Six cables measuring four inches (102 mm) in diameter run from the arch to the main structure of the bridge at the center. The two ends of the reinforced concrete arch are connected to each other underground using a post-tension tie beam, making the structure a tied arch.
After more than a decade of studies and designing, construction on the Westside MAX light rail line began in 1993. In 1997, construction on the Main Street Bridge began. The bridge was designed by BRW to cross what is planned to be five lanes of traffic on Main Street. The city of Hillsboro required the bridge to be able to cross over the planned widening of the roadway without using a center support column, so as to prevent the kind of accidents that had plagued a previous crossing at the same location, a wooden trestle bridge of the Oregon Electric Railway, built in 1917. After abandonment of freight service on the line in the mid-1970s, the city required the successor railroad Burlington Northern to remove the old crossing, in 1977. In September 1997, the construction of the bridge structure was completed. The “golden spike” of the Westside light rail line was driven with the final pieces of track of the project installed on this bridge in October 1997. Passenger service on the $964 million project began on September 12, 1998.
- ^ "Main Street Bridge". Geographic Names Information System, U.S. Geological Survey. 2010-03-11. http://geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:2582000. Retrieved 2010-03-22.
- ^ a b c Cortright, Robert. 2003. Bridging the World. Wilsonville, Or: Bridge Ink.
- ^ a b c d Arch support for Tri-Met extension; engineers in Hillsboro, OR constructed a 75-foot (23 m) high concrete arch over a roadway without using a center support, so that the arch can support bridge cables for the light rail overpass; Transit Update. Railway Age, November 1997 No. 11, Vol. 198; Pg. 27; ISSN: 0033-8826
- ^ a b Westside light rail the MAX Blue Line extension. TriMet. Retrieved on October 8, 2007.
- ^ a b Boatwright, JoAnn (September 15, 1998). "Bridge new ‘gateway to city’". The Hillsboro Argus, p. 8A.
- ^ "East Main Overpass". The Hillsboro Argus: pp. 18. October 19, 1976.
- ^ Oliver, Gordon and Don Hamilton (August 29, 1997). "MAX moves west: New rail stations will go on-line". The Oregonian.
- ^ a b Oliver, Gordon and Don Hamilton (September 9, 1998). "Go west, young MAX". The Oregonian.
- Media related to Main Street Bridge (Hillsboro, Oregon) at Wikimedia Commons
- Benjamin, Adam J. Portland MAX: East-West MAX (Blue). world.nycsubway.org
City of Hillsboro, Oregon, USA Government Transportation Education Companies Parks and
Recreation53rd Avenue Park • Bagley Park • Bicentennial Park • Hamby Park • Hillsboro Stadium • Hondo Dog Park • Jackson Bottom • Magnolia Park • Noble Woods Park • Orchard Park • Oregon International Airshow • Rood Bridge Park • Reedville Creek Park • Shute Park • Turner Creek Park • Walters Cultural Arts Center
OtherThe Argus • Chief Kno-Tah • Classic Aircraft Aviation Museum • H.A.R.T. • David Hill • Hillsboro Symphony Orchestra • Kaiser hospital • KUIK • Old Scotch Church • Oregon Chorale • Orenco • Orenco Station • People • Pioneer Cemetery • Primate Research Center • Rice Rock Museum • Tanasbourne • Tuality Hospital Bridges in the metropolitan area of Portland, Oregon Across the Willamette River
(north to south)St. Johns Bridge • Burlington Northern Railroad Bridge 5.1 • Fremont Bridge • Broadway Bridge • Steel Bridge • Burnside Bridge • Morrison Bridge • Hawthorne Bridge • Marquam Bridge • Caruthers Bridge (under construction) • Ross Island Bridge • Sellwood Bridge • Lake Oswego Railroad Bridge • Abernethy Bridge • Oregon City Bridge • Boone Bridge
Across the Columbia River
(west to east)
miscellaneousBlue Bridge (Reed College campus) • Gibbs Street Pedestrian Bridge (under construction, across I-5) • Main Street Bridge (MAX in Hillsboro) • Oregon Slough Railroad Bridge (North Portland Harbor) • Sauvie Island Bridge (Multnomah Channel) • Vista Bridge (Goose Hollow) See also: Transportation in Portland, Oregon • List of crossings of the Columbia River • List of crossings of the Willamette River
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