| Credit: | unknown photographer |
|---|---|
| Date: | 1863.07 |
| Negative Size: | 6.5 in. x 8.5 in. |
| Equipment: | bridge pontoon (wood) |
| Locations & Lines: | Washington DC; District of Columbia; Maryland; Potomac River |
| Military Units: | Corps of Engineers; US Army |
| Structures & Establishments: | Benhams Pontoon Bridge (Potomac River) |
| Sources: | Lee Gallery; USAMHI – MOLLUS collection |
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