Robert A. Booth (Winchester) Bridge
Benjamin Tang, P.E. Bridge Preservation Manager
Approaches to Historic Bridge Rehabilitation
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Robert A. Booth (Winchester) Bridge One of several reinforced concrete ribbed deck arches designed by
Conde McCullough and built in 1924.
Architecture features include Roman & Gothic details, series of arches, cantilevered balconies and lancet-arched balustrade railings. Length: 1 @ 62’ + 7 @ 112’ + 1 @ 41’-8” = 887’- 8” Span Type: 7 delicate arched spans, open spandrel columns, lancet-
arched spandrel walls supporting the deck & roadway
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Winchester Bridge / North Umpqua R.
Date of Rehab: 2007 Cost of Rehab Project:
$9.93 M low bid Designed by Conde
McCullough, 1922; Rehab. By Mats Halvardson, 2007
Client/Owner: Oregon Department of Transportation
Contractor: Hamilton Construction Co., Springfield, OR
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Winchester Bridge
I-5 Steel Bridge
OR-CA RR
Winchester Dam
Amacher Park
Fish Ladder
Parking
Kolhagen House
Significant Issues Associated With Project
Historic Bridge Preservation Cultural Resources Tourism Safety Corrosion & Deterioration Capacity & Load Rating
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Historic Bridge Preservation Dedicated multi-disciplinary
team (structural, mechanical, corrosion, and electrical engineers)
Identify, assess and prioritize needed bridge work
Methods: pressure grouting or pumped concrete repairs, FRP composites strengthening, precasting of replacement elements, cathodic protection, recoating, microsilica deck overlay…
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Cultural Resource & Tourism National Register Listed Winchester
Dam (ca. 1880) Amacher Park Oregon & California Railroad Corridor
(ca.1870’s) 1904 Kolhagen Ranch House Boat ramps and sport fishing along the
river Historic steel bridge (Interstate 5)
upstream.
Access Parking Pedestrian & Bikers Fish ladder viewing area
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19’-4”
Safety
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Narrow Roadway Width No Curb/Shoulders Sight Distance Straightening a curve on the North end
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Comparison of original deck and new deck
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Stealth Rail – Precast in 3 staged fabrication
36-inch rail 42-inch rail
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Corrosion and Deterioration Beams – worst at joints Steel rebar with section
loss Cracks and spalls Drainage
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How Significant Issues Were Resolved New widened deck, sidewalk, stealth
rails New deck joints (asphalt plug joints) New brackets and wider overhangs Existing - Removed to sound concrete Pressured grout or Pumped concrete into
formed repairs CFRP strengthening/structural capacity
(H-15 to HS20) Added drainage for run-off in new deck
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Lessons Learned/Conclusions Bridge Preservation Program and Policy in General
Long-term objectives with funding support Sustainable program strategies Extending service life of historic structure
Implement “just in time” preservation strategies Corrosion protection systems Corrosion resistance and high performance materials (FRP, SS…)
Trained staffs Developed multi-disciplinary engineers in bridge preservation NACE, SSPC, NHI, training/certification
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Lesson Learned/ConclusionsEarly coordination with all stakeholders and
regulatorsContractor’s experience and
prequalificationPublic support to allow closing the bridgeContinuous construction support
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