| 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 |
Garro Street Bridge
Marshall County Bridge 227 |
 | Garro Street Over Yellow River | Plymouth: Marshall County, Indiana | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 155 ft Main Span Length: 62 ft Roadway Width: 32.2 ft Main Spans: 2 |
1931 By: Unknown | The least altered and most significant of three concrete arch bridges in Plymouth. | 
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Jefferson Street Bridge
Marshall County Bridge 228 |
 | Jefferson Street Over Yellow River | Plymouth: Marshall County, Indiana | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 138 ft Main Span Length: 69 ft Roadway Width: 51 ft Main Spans: 2 |
1927 By: Unknown | One of three concrete arch bridges in Plymouth. | 
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LaPorte Street Bridge
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 | LaPorte Street (Pedestrian Walkway) Over Yellow River | Plymouth: Marshall County, Indiana | Metal Cantilever Multiple-Type-Connected Kingpost Through Truss, Fixed |
Total Length: 100 ft Roadway Width: 6 ft Main Spans: 2 |
1898 By: Rochester Bridge Company of Rochester, Indiana | This foot bridge is so extremely unusual that its design is difficult to describe or categorize. | 
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Michigan Street Bridge
Marshall County Bridge 226 |
| Michigan Street Over Yellow River | Plymouth: Marshall County, Indiana | Concrete Closed Spandrel Deck Arch, Fixed |
Total Length: 123 ft Main Span Length: 63 ft Roadway Width: 58 ft Main Spans: 2 |
1917 By: Unknown | This concrete arch bridge is one of three in Plymouth and was tastefully rehabilitated in 2008. | 
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Plymouth Railroad Bridge
Pennsylvania Railroad Yellow River Bridge |
 | Railroad (Soo Line) Over Yellow River | Plymouth: Marshall County, Indiana | Metal 8 Panel Rivet-Connected Pratt Full-Slope Pony Truss, Fixed | Main Spans: 1 | 1902 By: American Bridge Company of New York, New York | This massive pony truss is an extremely early example of a bridge built by the American Bridge Company. | 
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