Photographer's Note

The Valley Forge Covered bridge is also know as Knox Covered Bridge (PA-15-15#2) Burr Arch Truss built by Robert Russell in 1865. It is located in Valley Forge National Historical Park. It is named after Philander C. Knox (1855-1921) United States Senator from Pa. & General Henry Knox (1750-1806) an officer quartered at Valley Forge during the winter of 1777-1778. The GPS location is Lat. 40.0867N & Long. -75.4558W.
The bridge is built on a Burr Arch Truss.
See WS for bridge interior.
One of the earliest and most prominent bridge builders in our country was Theodore Burr from Torringford, Connecticut. His career began in New York where he built a bridge spanning the Hudson River in 1804. Burr's truss design soon became one of the more frequently used sytems. The Burr arch truss, as the design became known, used two long arches, resting on the abutements on either end, that typically sandwiched a multiple kingpost structure. There are more bridges in Pennsylvania using the Burr truss design than the total of the other truss designs-123 located in or between thirty different counties.

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Additional Photos by Asa Jernigan (asajernigan) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3592 W: 88 N: 5553] (21427)
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