|Bridge Name||Facility Carried / Feature Intersected||Location||Structure Type||Construction Date and Builder/Engineer|
Fairview-Snodgrass Road Bridge
||Non-Motorized Pathway Over Unnamed Miami River Tributary||Near Troy: Miami County, Ohio||Metal 6 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed||1913 By Builder/Contractor: Unknown|
|Rehabilitation Date||Main Span Length||Structure Length||Roadway Width||Main Spans||NBI Number|
|1954||67 Feet (20.4 Meters)||69 Feet (21 Meters)||15.4 Feet (4.7 Meters)||1||5531055|
This is a six panel pin connected half-hip Pratt pony truss. This is a decent length for a half-hip bridge, and the bridge has an unusually large number of panels for this length. The trusses are not very deep (tall) looking for a bridge of this length, but this is partly an illusion because the floor beams for this bridge rest on top of the bottom chord eyebar heads, rather than being positioned below the deck via u-bolt hangers. This had the effect of raising the roadway up a bit. This bridge has substantial loss of historic integrity. The floor beams are replacements and the way they rest on the bottom chord is likely not how the original floor beams were positioned. The original floor beams were likely hung from u-bolt hangers. The most substantial alteration however is that all the verticals were replaced with rolled i-beams in 1954. Apparently this is also when the floorbeams were added. Finally, outriggers also appear to have been added to the bridge at this time. Also, original railings do not remain on the bridge.
In 2006, on Fairview Snodgrass Road, the deck of the bridge was wooden with an asphalt wearing surface. The abutments were originally stone, but concrete had been added in places. On another note, in 2006, sections of what looked like a truss bridge top chord or end post were found laying under the bridge. One was leaning up against the abutment, and another was laying on the dirt near the abutment. The top chord and end posts of the Fairview-Snodgrass Road Bridge are original so apparently these beams came from some other bridge that was demolished.
The National Bridge Inventory gave a 1913 construction date for this bridge. While they had almost faded from construction practice, pin-connected truss bridges were sometimes still built at this time. However, this date is suspect and this bridge may be older, perhaps relocated and reused here in 1913 instead, with the trusses themselves having an older actual construction date. In 1913 a big flood hit Miami County, and some bridges were destroyed. Relocating a non-essential bridge to this site would have been a quick way to replace a washed out bridge. Also, some of the bottom chord eyebars of this bridge have unusually shaped heads that have a rounded rectangle shape. This shape was more common on 19th Century truss bridges, not 1913 truss bridges. Also, this shape was used by the Smith Bridge Company on bridges it built. There is a slight possibility that the company built this bridge. If the bridge was built by Smith Bridge Company it would date to the 1880s or 1890s. If the original vertical members remained it would be easier to learn if Smith Bridge Company really built this bridge.
Despite alteration, the top chord, diagonals and bottom chord are original. The bridge still conveys information about how bridge's of the past were built, and the bridge is far more interesting to look at than any modern bridge. The bridge as a result still has heritage value. It was perhaps with this thinking that this bridge was lucky enough to be preserved.
HistoricBridges.org photo-documented this bridge in its original location, crossing Spring Creek in Miami County in 2006. Later, in 2011, the bridge was relocated and restored for pedestrian use on a non-motorized trail north of Troy Ohio. The main map page for this bridge reflects the current location of the bridge. To see the former, original location of the bridge click here. A photo of the bridge relocated and being restored is shown below. Photo courtesy Tom Barrett, Ohio Department of Transportation.
Information and Findings From Ohio's Historic Bridge Inventory
The bridge carries a 2 lane road over a stream in a rural area of active farms.
The 1 span, 69'-long, pin-connected Pratt pony truss bridge is supported on concrete abutments. The bridge has eye-bar tension members and built-up upper chords. The verticals, which appear to be rolled sections, are likely replacement of the original built-up verticals. Welded outriggers have been added, and it appears the floorbeams were replaced too.
Replacement vertical members and welded outriggers added. Floorbeams also appear to be replacement, 1954.
Summary of Significance
The bridge was determined eligible in 2007 based on its type/design and age in comparison to other bridges in the county and region. It is being moved to a bike path in the City of Piqua.
The bridge is one of over 150 extant pin-connected truss bridges dating from 1874 for pony trusses and 1876 for thru trusses. Twenty six predate 1888 and represent the era of experimentation that evolved into standardized designs by about 1888. This example has moderate significance because the genre and the fabricator are so well represented in Ohio and because it has been significantly altered.
Bridge Considered Historic By Survey: Yes
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