robert a. booth (winchester) bridge benjamin tang, p.e. bridge preservation manager approaches to...

Robert A. Booth (Winchester) Bridge

Benjamin Tang, P.E. Bridge Preservation Manager

Approaches to Historic Bridge Rehabilitation

Case Study #4

1

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

Case Study #4

2

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

Case Study #4

3

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

Case Study #4

4

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…

Case Study #4

5

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

Case Study #4

6

19’-4”

Safety

Case Study #4

Narrow Roadway Width No Curb/Shoulders Sight Distance Straightening a curve on the North end

7

Comparison of original deck and new deck

8

Case Study #4

Stealth Rail – Precast in 3 staged fabrication

36-inch rail 42-inch rail

9

Case Study #4

Corrosion and Deterioration Beams – worst at joints Steel rebar with section

loss Cracks and spalls Drainage

10

Case Study #4

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

11

Case Study #4

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

12

Case Study #4

Lesson Learned/ConclusionsEarly coordination with all stakeholders and

regulatorsContractor’s experience and

prequalificationPublic support to allow closing the bridgeContinuous construction support

13

Case Study #4