| Special Bridge Conditions Legend |
| ! | Confirmed demolition date within one year or an especially historic bridge that is threatened with demolition at any level. |
| X | The bridge has been confirmed demolished or collapsed. |
| S | The bridge has been dismantled or moved to an offsite location and is not currently available for public viewing. |
| L | Most or all of the original bridge material has been demolished and replaced, including historically significant elements, but some original parts of the bridge remain. |
| Note: This website cannot guarantee the current condition of any bridge on this website. Bridges lacking these icons should not necessarily be considered condition-free. |
| Bridge Name | HSR Rating | Facility Carried / Feature Intersected | Location | Structure Type | Structure Dimensions | Construction Date / Builder or Contractor | Description | Thumbnail |
123rd Street Bridge
Iowa Bridge Number 346360 |
 | 123rd Street Over Turkey River | Rural: Winneshiek County, Iowa | Metal 10 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 185 ft Main Span Length: 90 ft Roadway Width: 15.1 ft Main Spans: 2 |
1936 By: Unknown | A good example of a two-span riveted pony truss from the 1930s. | 
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143rd Avenue Bridge
Iowa Bridge Number 347310 |
 | 143rd Avenue Over Upper Iowa River | Rural: Winneshiek County, Iowa | Metal 8 Panel Rivet-Connected Parker Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed |
Total Length: 217.2 ft Main Span Length: 150 ft Roadway Width: 14.8 ft Main Spans: 1 |
By: Unknown | A representative example of a rural standard plan Parker truss in Iowa. | 
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220th Street Bridge
Iowa Bridge Number 361080 |
| 220th Street Over Turkey River | Rural: Winneshiek County, Iowa | Metal 6 Panel Rivet-Connected Pratt Through Truss, Fixed |
Total Length: 110 ft Main Span Length: 110 ft Roadway Width: 14.4 ft Main Spans: 1 |
By: Unknown | This bridge represents a standard rural Iowa riveted through truss very well. | 
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235th Avenue Bridge
Iowa Bridge Number 347780 |
 | 235th Avenue Over 10 Mile Creek | Rural: Winneshiek County, Iowa | Metal 5 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 60 ft Main Span Length: 60 ft Roadway Width: 15.4 ft Main Spans: 1 |
By: Unknown | This bridge has good integrity and is an unusual example of its type. | 
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265th Street Bridge
Iowa Bridge Number 347840 |
| 265th Street Over 10 Mile Creek | Rural: Winneshiek County, Iowa | Metal 3 Panel Pin-Connected Pratt Half-Hip Pony Truss, Fixed |
Total Length: 32.2 ft Main Span Length: 32.2 ft Roadway Width: 16.1 ft Main Spans: 1 |
By: Unknown | A very short example of a once-common bridge type. | 
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305th Avenue Bridge
Iowa Bridge Number 347140 |
 | 305th Avenue Over Bohemian Creek | Rural: Winneshiek County, Iowa | Metal 8 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 75 ft Main Span Length: 70 ft Roadway Width: 16.1 ft Main Spans: 1 |
1922 By: Unknown | A small, traditionally composed standard pony truss in a rural setting. | 
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310th Avenue Bridge
Iowa Bridge Number 349060 |
| 310th Avenue Over Minor Creek | Rural: Winneshiek County, Iowa | Metal 4 Panel Rivet-Connected Double-Intersection Warren Pony Truss, Fixed |
Total Length: 60 ft Main Span Length: 60 ft Roadway Width: 15.4 ft Main Spans: 1 |
1910 By: Unknown | A small scale riveted truss bridge that is unlike most other riveted truss bridges in the county. | 
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370th Street Bridge
Iowa Bridge Number 349850 |
| 370th Street Over Upper Iowa River | Rural: Winneshiek County, Iowa | Metal 8 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 147 ft Main Span Length: 73.2 ft Roadway Width: 16.1 ft Main Spans: 2 |
1904 By: Unknown | This bridge is a most unusual structure which is composed of at least one relocated truss span. | 
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Chimney Rock Bridge
Snell Bridge |
 | Chimney Rock Road Over Upper Iowa River | Rural: Winneshiek County, Iowa | Metal 10 Panel Pin-Connected Parker Through Truss, Fixed |
Total Length: 162 ft Main Span Length: 160 ft Roadway Width: 16 ft Main Spans: 1 |
1906 By: Continental Bridge Company of Chicago and Peotone, Illinois | Apparantly relocated here in 1952, this is a beautiful and significant bridge built by an uncommon and elusive builder. | 
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Clarks Bridge
Iowa Bridge Number 349860 |
| 360th Street Over Upper Iowa River | Rural: Winneshiek County, Iowa | Metal 8 Panel Rivet-Connected Pratt Through Truss, Fixed and Approach Spans: Concrete Stringer (Multi-Beam), Fixed |
Total Length: 152 ft Main Span Length: 120 ft Roadway Width: 15.7 ft Main Spans: 1 |
1913 By: Unknown | This impressive riveted truss bridge has very high trusses. | 
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Cold Water Creek Road Bridge
Iowa Bridge Number 349700 |
 | Cold Water Creek Road Over Cold Water Creek | Rural: Winneshiek County, Iowa | Metal 6 Panel Rivet-Connected Warren Pony Truss, Fixed |
Total Length: 50 ft Main Span Length: 50 ft Roadway Width: 21 ft Main Spans: 1 |
1962 By: Unknown | A short and late example of a standard riveted truss in Iowa. | 
| ! |
Fort Atkinson Bridge
Iowa Bridge Number 346320 |
 | 150th Street Over Turkey River | Rural: Winneshiek County, Iowa | Metal 7 Panel Pin-Connected Pratt Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed |
Total Length: 183 ft Main Span Length: 132 ft Roadway Width: 16.1 ft Main Spans: 1 |
1892 By: D. H. Young of Manchester, Iowa | Built by a local bridge company, this is a beautiful, well-decorated example of its kind. | 
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Freeport Bridge
|
 | Park Trail Over Park Grounds | Decorah: Winneshiek County, Iowa | Metal 12 Panel Pin-Connected Bowstring Through Truss, Fixed |
Total Length: 160 ft Main Span Length: 159.6 ft Roadway Width: 16 ft Main Spans: 1 |
1878 By: Wrought Iron Bridge Company of Canton, Ohio | This well-preserved bridge is the second longest historic bowstring truss span in the United States. | 
| ! |
Gilliece Bridge
Iowa Bridge Number 348800 |
| Cattle Creek Road Over Upper Iowa River | Rural: Winneshiek County, Iowa | Metal Pin-Connected Bowstring Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed |
Total Length: 151 ft Main Span Length: 129 ft Roadway Width: 16.1 ft Main Spans: 1 |
1874 By: Wrought Iron Bridge Company of Canton, Ohio | An extremely important bowstring with design details unlike the other two similar bowstrings in this county. | 
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Happy Hollow Road Bridge
10 Mile Creek Bridge / Iowa Bridge Number 347800 |
| Happy Hollow Road Over 10 Mile Creek | Rural: Winneshiek County, Iowa | Metal 2 Panel Multiple-Type-Connected Kingpost Pony Truss, Fixed |
Total Length: 36 ft Main Span Length: 35 ft Roadway Width: 16 ft Main Spans: 1 |
1895 By: R. D. Wheaton Bridge Company of Chicago, Illinois | An example of one of the smallest and rarest truss bridge types in the country. | 
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Henry Bridge
Iowa Bridge Number 348910 |
 | Scenic River Road Over Upper Iowa River | Rural: Winneshiek County, Iowa | Metal 8 Panel Pin-Connected Pratt Through Truss, Fixed |
Total Length: 121 ft Main Span Length: 120 ft Roadway Width: 15.4 ft Main Spans: 1 |
1911 By: Unknown | This traditionally composed bridge is a good representative example of its kind. | 
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Hog's Back Bridge
Iowa Bridge Number 52540 |
 | US-52 Over Dry Run (Drainage Channel) | Decorah: Winneshiek County, Iowa | Concrete Open Spandrel Deck Arch, Fixed |
Total Length: 103 ft Main Span Length: 84 ft Roadway Width: 30.2 ft Main Spans: 1 |
1963 By: Unknown | This bridge has an unusual appearance for its type and is surrounded by a dramatic landscape. | 
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