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85-foot-long
single-span
Howe truss
Bridge Location:
Cottage Grove,
Oregon
Bridge Owner:
City of Cottage
Grove
Greg Ausland, PE, Project Manager, [email protected]
Tony LaMorticella, PE, SE, Sr. Project Engineer, [email protected]
OBEC Consulting Engineers
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Chambers Covered Railroad Bridge
Note short smokestacks
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Chambers Covered Railroad Bridge 3
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Bridge shown at
upper left
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Chambers Covered Railroad Bridge
Mill pond visible on left of this 2006 photo
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Chambers Covered Railroad Bridge
Rail bed about 8 feet above current road elevation
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Chambers Covered Railroad Bridge 7
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Chambers Covered Railroad Bridge
Fire on bottom chord near mid-span
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Chambers Covered Railroad Bridge
Bottom chord crushing at both ends
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Corbels upstream side rotted away completely
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• 2006 City of Cottage Grove obtains
ownership of bridge.
• 2007 OBEC Consulting Engineers
inspects and documents bridge.
• 2009 Funding by FHWA through
National Historic Covered Bridge
Preservation program.
• 2009 Additional funding through
American Recovery and
Reinvestment Act.
• 2010 High winds almost destroy
remaining structure.
Safe removal becomes an
emergency.
• 2011 Rehabilitation construction Grand
Opening, December 3, 2011
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Chambers Covered Railroad Bridge
Built adjacent to the bridge and rolled under
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Chambers Covered Railroad Bridge
First outside
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then inside
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Chambers Covered Railroad Bridge
Using man lifts and large crane
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Chambers Covered Railroad Bridge
Chord pieces kept in order
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Splice assemblies kept together
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Chambers Covered Railroad Bridge
Potentially reusable material stored under cover
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Hanger rods with upset threads
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Chambers Covered Railroad Bridge
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Chambers Covered Railroad Bridge
All original hardware was shot-blast cleaned, painted and reused
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Chambers Covered Railroad Bridge
Bridge rehabilitation construction done on dry land
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Time-lapse video: http://www.obec.com/bridge/chambers-covered-bridge.html
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Chambers Covered Railroad Bridge
East approach
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West approach
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Chambers Covered Railroad Bridge
Interior
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2012 Oregon Heritage Excellence Award
2012 Daily Journal of Commerce Oregon Top Projects, First Place Renovation Award
2013 ACEC Oregon Engineering Excellence Grand Award