Approaches to Historic Bridge Rehabilitation Case Study #4 Robert A. Booth (Winchester) Bridge Benjamin Tang, P.E. Bridge Preservation Manager 1

Robert A. Booth (Winchester) Bridge Case Study #4 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 2

Winchester Bridge / North Umpqua R. Case Study #4 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 Amacher Park OR-CA RR I-5 Steel Bridge Kolhagen House Winchester Bridge Parking Fish Ladder Winchester Dam 3

Significant Issues Associated With Project Case Study #4 Historic Bridge Preservation Cultural Resources Tourism Safety Corrosion & Deterioration Capacity & Load Rating 4

Historic Bridge Preservation Case Study #4 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… 5

Cultural Resource & Tourism Case Study #4 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 6

Safety 19’-4” Narrow Roadway Width No Curb/Shoulders Sight Distance Case Study #4 19’-4” Narrow Roadway Width No Curb/Shoulders Sight Distance Straightening a curve on the North end 7

Comparison of original deck and new deck Case Study #4 Comparison of original deck and new deck 8

Case Study #4 36-inch rail 42-inch rail Stealth Rail – Precast in 3 staged fabrication 9

Corrosion and Deterioration Case Study #4 Beams – worst at joints Steel rebar with section loss Cracks and spalls Drainage 10

How Significant Issues Were Resolved Case Study #4 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 11

Lessons Learned/Conclusions Case Study #4 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 12

Lesson Learned/Conclusions Case Study #4 Early coordination with all stakeholders and regulators Contractor’s experience and prequalification Public support to allow closing the bridge Continuous construction support 13