Transcript Case Study

Approaches to Historic Bridge Rehabilitation
Case Study #3
Carrollton Bridge
Jonathon L. Sera, P.E.
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Case Study #3
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
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Carrollton Bridge Rehabilitation
 Notice to Proceed with Design:
May 2nd, 2005
 Construction Cost: $1,916,750
 Designer: Butler, Fairman, &
Seufert, Inc.
 Owner: Carroll County
 Contractor: Wirtz and Yates, of
Kentland, Indiana
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Significant Issues Associated With Project
 20 foot wide clear roadway
 Deteriorated original railing
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Extensive Concrete Deterioration
in Overhang Brackets
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How Clearance Issue Was Resolved

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.
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How Railing Issue Was Resolved

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.
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New longer brackets were designed
composite with deck.
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Old Brackets were used as temporary supports
and as guides for new brackets.
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How Aesthetic Issue Was Resolved

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.
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Insert Picture(s) of Solution
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Project was reopened to traffic 19 months after
notice to proceed for design work.
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The rehabilitation cost approximately 40%
less than the earlier planned replacement.
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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.
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