Burlington Northern Railroad Bridge 5.1
- Burlington Northern Railroad Bridge 5.1
Infobox_Bridge
bridge_name=Burlington Northern Railroad Bridge 5.1
.jpg)
locale=Portland, Oregon
carries=2 railroad tracks
crosses=Willamette River
maint=BNSF Railway
open=1908
below=convert|200|ft when open
design=vertical lift bridge
mainspan=convert|516|ft
lat=45.57730
long=-122.74678
The Burlington Northern Railroad Bridge 5.1, also known as the St. Johns Railroad Bridge or the Willamette Draw, is a truss bridge with a vertical lift that spans the Willamette River in Portland, Oregon. The BNSF Railway owns the bridge, and the 5.1 denotes the rail mileage from Portland's Union Station. The bridge consists of five sections, with the two sections closest to the bank fixed. The center section is a movable lift span.
The first bridge was built by Northern Pacific Railway in 1908 with the middle section being the longest swing span bridge in the world. This movable middle section was replaced by a vertical lift span that was completed in 1989 at a cost of $38 million. This convert|516|ft|adj=on long lift span is the fourth highest in the world, providing vertical clearance of convert|200|ft.
The bridge carries 2 tracks across the Willamette River. Signals on both approaches to the bridge prevent trains from entering the bridge when the lift span is up, but as a precaution, trains are still required to radio the bridge operator and confirm the position of the bridge.
References
Wood, Sharon. The Portland Bridge Book. Portland: Oregon Historical Society, 2001. ISBN 0-87595-211-9.
ee also
* List of crossings of the Willamette River
Crossings navbox
structure = Crossings
place = Willamette River
bridge = Burlington Northern Railroad Bridge 5.1
bridge signs = "BNSF Railway"
upstream = Fremont Bridge
upstream signs =
downstream = St. Johns Bridge
downstream signs =
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