National Historic Landmarks (NHLs) are historic properties that illustrate the heritage of the United States. The over 2,600 NHLs found in the U.S. today come in many forms: historic buildings, sites, structures, objects, and districts. Each NHL represents an outstanding aspect of American history and culture.
Context Study
![Click to see the full photo Elevation view of Larwood Bridge in Oregon](/subjects/heritagedocumentation/images/NCBRP-NHL-Larwood-Bridge.jpg?maxwidth=650&autorotate=false)
The Covered Bridges National Historic Landmark Context Study (pdf) was written by historian Lola Bennett in 2012.
National Historic Landmarks
Historian Lola Bennett wrote the following covered bridge nominations. All have been designated National Historic Landmarks.
![Click to see the full photo B&W photo showing detail of Brown Bridge truss](/subjects/heritagedocumentation/images/NCBRP-NHL-Brown-Bridge.jpg?maxwidth=650&autorotate=false)
Brown Bridge
Rutland County, Vermont
Town Lattice Truss (1880)
Designated an NHL in 2014
NHL nomination (pdf)
Survey: HAER VT-28
![Click to see the full photo B&W photo showing detail of California Powder Works Bridge Truss](/subjects/heritagedocumentation/images/NCBRP-NHL-California-Powder-Works-Bridge.jpg?maxwidth=650&autorotate=false)
California Powder Works Bridge
Santa Cruz County, California
Smith Truss (1872)
Designated an NHL in 2015
Survey: HAER CA-313
![Click to see the full photo B&W photo of Duck Creek Aqueduct](/subjects/heritagedocumentation/images/NCBRP-NHL-Duck-Creek-Aqueduct.jpg?maxwidth=650&autorotate=false)
Duck Creek Aqueduct
Metamora, Indiana
Burr-Arch Truss (1846)
Designated an NHL in 2014
Survey: HAER IN-108
![Click to see the full photo Color photo of Humpback Bridge](/subjects/heritagedocumentation/images/NCBRP-NHL-Humpback-Bridge.jpg?maxwidth=650&autorotate=false)
Humpback Bridge
Allegheny County, Virginia
Multiple Kingpost Truss (1857)
Designated an NHL in 2012
NHL nomination (pdf)
Survey: HAER VA-1
![Click to see the full photo Color photo of Knight's Ferry Bridge](/subjects/heritagedocumentation/images/NCBRP-NHL-Knights-Ferry.jpg?maxwidth=650&autorotate=false)
Knight's Ferry Bridge
Stanislaus County, California
Howe Truss (1863)
Designated an NHL in 2012
Survey: HAER CA-314
![Click to see the full photo Black & white photo of West Union Bridge](/subjects/heritagedocumentation/images/NCBRP-NHL-West-Union-Bridge.jpg?maxwidth=650&autorotate=false)
West Union Bridge
West Union, Indiana
Burr-Arch Truss (1876)
Designated an NHL in 2016
NHL nomination (pdf)
Survey: HAER IN-105
Additional Information: Animated Fly-Through
Last updated: November 23, 2022