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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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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