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

2. Robert A. Booth (Winchester) Bridge
Case Study #4
One of several reinforced concrete ribbed deck arches designed by Conde McCullough and built in
Architecture features include Roman & Gothic details, series of arches, cantilevered balconies and lancet-arched balustrade railings.
Length: 62’ + 112’ + 41’-8” = 887’- 8”
Span Type: 7 delicate arched spans, open spandrel columns, lancet-arched spandrel walls supporting the deck & roadway 2

3. 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

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

5. 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

6. 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

7. 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

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

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

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

11. 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

12. 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

13. 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