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Insley Road Bridge

Insley Road Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: May 5, 2006 and May 29, 2018

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Key Facts

Facility Carried / Feature Intersected
Insley Road (CR-604 / Dixie Highway) Over Rocky Ford
Location
Rural: Wood County, Ohio: United States
Structure Type
Concrete Rainbow Through Arch, Fixed
Construction Date and Builder / Engineer
1930 By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
63 Feet (19.2 Meters)
Structure Length
95 Feet (29 Meters)
Roadway Width
28 Feet (8.53 Meters)
Spans
1 Main Span(s)
NBI Number
8759162

Historic Significance Rating (HSR)
View Information About HSR Ratings

Bridge Documentation

This bridge no longer exists!

Bridge Status: This historic bridge was demolished and replaced!

This was a beautiful example of the rainbow arch structure type. The technical name is a concrete through arch bridge. They are a very attractive bridge design, and among the most impressive and rare of concrete bridge types. This is a good example of the structure type, having retained historic integrity, with no railing or floor beam modifications. The bridge did suffer from severe deterioration in certain areas including spalling and extensive map cracking with efflorescence found on the floor beams and deck. The arch, hangers and railings were all in much better condition. A possible preservation scenario would have been to replace the deck and floor beams completely, while repairing the arches. Unfortunately, the bridge was instead demolished and replaced with a slab of concrete.

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

View HAER Recordation Narrative and Photos, PDF

Above: Replacement bridge. Photo Credit: Rick McOmber.

Information and Findings From Ohio's Historic Bridge Inventory

Setting/Context

The bridge carries a 2 lane road over a stream in a sparsely developed, rural setting.

Physical Description

The 1 span, 95'-long, rainbow (thru) arch bridge has flat-paneled arch ribs with floorbeam hangers and articulated floorbeams. Concrete balustrades fill between the hangers, and flat-panel parapets extend between the arch ribs and the wingwalls.

Integrity

Some loss of fabric from spalling.

Summary of Significance

The rainbow arch bridge built in 1930 is a complete, albeit later, example of a bridge type that was in use from the late 1900s to 1930s. The inventory has identified seven surviving examples dating from 1909 to 1930 (Phase 1A Update, 2008). This one, like several others, appears to be the state bridge bureau's design that was in use during the 1920s to early 1930s based on the details.

The rainbow arch in the U.S. developed in the late 1900s and early 1910s, with its best known variation the 1912 patented design of James B. Marsh of Iowa, (which is debatably a steel arch encased in concrete). In the basic design the deck is supported by vertical hangers between the arch ribs and the floorbeams. The arch ribs, like Marsh's can have patented steel systems within them, or they can be un-patented systems of conventional reinforced concrete. The bridge type/design is known to be aesthetically pleasing and came to be popularly known as "rainbow" arches in some parts of the country, including Ohio, although technically they are perhaps best described as thru arches. The bridge type was always more numerous in the Midwest than other parts of the U.S., probably because of the influence of Marsh. The 1909 and 1911 thru arches designed by E. A. Gast in Hamilton County (3137600 & 3130622) are Ohio's oldest examples and very technologically significant as they predate the Marsh patent and are believed to have been developed independently. Later examples in Ohio are most often the design of the state bridge bureau, which developed its own standard rainbow arch by 1923.

Justification

The bridge is one of 5 remaining examples of the type that was once not uncommon in Ohio. It offered an aesthetic treatment preferred in urban and picturesque settings. The 6 examples date from 1909 to 1930, and each is of high significance given their limited numbers and importance within the context as the aesthetic alternative to the thru truss bridge.

Bridge Considered Historic By Survey: Yes


This bridge is tagged with the following special condition(s): Unorganized Photos

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Photo Galleries and Videos: Insley Road Bridge

 
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Bridge Photo-Documentation
Original / Full Size Photos
A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
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Bridge Photo-Documentation
Mobile Optimized Photos
A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
2018 Additional Unorganized Photos
Original / Full Size Photos
A supplemental collection of photos that are from additional visit(s) to the bridge and have not been organized or captioned. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
2018 Additional Unorganized Photos
Mobile Optimized Photos
A supplemental collection of photos that are from additional visit(s) to the bridge and have not been organized or captioned. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer

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Maps and Links: Insley Road Bridge

This historic bridge has been demolished. This map is shown for reference purposes only.

Coordinates (Latitude, Longitude):

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