Carrollton Bridge Jonathon L. Sera, P.E. Approaches to Historic Bridge Rehabilitation Case Study #3 1

Carrollton Bridge Carrollton Road over the Wabash River, just north of Delphi, Indiana Rural location was the site of the first permanent crossing of Wabash River. Also, the location of historic Wabash and Erie Canal Lock. Reinforced Concrete Arch Bridge Constructed in 1927 Six spans Designed by Daniel B. Luten Listed on the National Register of Historic Places Case Study #3 2

Carrollton Bridge Rehabilitation Notice to Proceed with Design: May 2 nd, 2005 Construction Cost: $1,916,750 Designer: Butler, Fairman, & Seufert, Inc. Owner: Carroll County Contractor: Wirtz and Yates, of Kentland, Indiana Case Study #3 3

Significant Issues Associated With Project Case Study #3 20 foot wide clear roadway Deteriorated original railing 4

Extensive Concrete Deterioration in Overhang Brackets Case Study #3 5

How Clearance Issue Was Resolved Case Study #3 Bridge owner wanted to widen bridge by 8 feet. Interested historical agencies wanted width to remain the same. Both parties compromised on widening bridge by 4 feet. 6

How Railing Issue Was Resolved Case Study #3 Modified Texas Rail to match existing rail. Changed the opening shape from the “church window” to a rectangle. We were able to keep reinforcement details the same. Therefore, the rail was still considered crash-worthy. 7

New longer brackets were designed composite with deck. Case Study #3 8

Old Brackets were used as temporary supports and as guides for new brackets. Case Study #3 9

How Aesthetic Issue Was Resolved Insert Picture(s) of Solution Case Study #3 Masonry Coating was used to blend new concrete with old. Contract required several test swaths. Owner agreed to allow interested parties to select final color combinations. 10

Project was reopened to traffic 19 months after notice to proceed for design work. Case Study #3 11

The rehabilitation cost approximately 40% less than the earlier planned replacement. Case Study #3 12

Lessons Learned/Conclusions Must encourage owner and interested parties to compromise. Look for current standards that may be able to be slightly modified to match existing conditions. Careful detailing can ensure that historic integrity is not lost in rehabilitation and repair work. Case Study #3 13