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Casselman River Bridge State Park
The bridge's south aspect
Casselman River Bridge State Park is located in Maryland
Casselman River Bridge State Park
Casselman River Bridge State Park
Location in Maryland
Location Garrett County, Maryland, United States
Nearest town Grantsville, Maryland
Area 4 acres (1.6 ha)
Elevation 2,113 ft (644 m)
Designation Maryland state park
Established 1957
Administrator Maryland Department of Natural Resources
Website Casselman River Bridge State Park
Casselman's Bridge, National Road
Castleman's River Bridge Historic Marker.jpg
Location East of Grantsville on U.S. Route 40 Alternate, Grantsville, Maryland
Area < 1 acre
Built 1813-1814
Architect David Shriver, Jr.
NRHP reference No. 66000391
Significant dates
Added to NRHP October 15, 1966
Designated NHL January 29, 1964

The Casselman Bridge is an historic transportation structure on the Casselman River, located immediately east of Grantsville in Garrett County, Maryland. The bridge was built in 1813-1814 as part of the National Road. Historic markers posted at each end read:

Erected 1813 by David Shriver, Jr.,
Sup't of the "Cumberland Road" (The
National Road). This 80 foot span
was the largest stone arch in America
at the time. It was continuously
used from 1813 to 1933.

Since 1957, the structure, which has also been known as Casselmans Bridge, Castleman's Bridge, and Little Crossings Bridge, has been preserved by the state of Maryland as Casselman River Bridge State Park. The bridge was declared a National Historic Landmark in 1964, and placed on the National Historic Register in 1966.


The 354-foot-long (108 m) stone arch bridge spans 80 feet (24 m) with a 30-foot-high (9.1 m) arch and a roadway width of 48 feet (15 m). The bridge was constructed in 1813–1814 to aid in the westward movement through the frontier wilderness west of Cumberland, Maryland. The first wheeled vehicles crossed the bridge in 1815. As a "tidal wave" of western expansion followed the opening of the National Road, Casselman Bridge had heavy traffic that included wagons drawn by 12-horse teams and carrying 10-ton loads. A small portion of the original National Road still exists at the approaches to the bridge.

The bridge was strengthened for motorized traffic in 1911 and continued in service as a highway until 1933, when a modern steel span was built nearby to serve what is now US Route 40 Alternate. In the 1940s and early 1950s, efforts were made to preserve the bridge when sections started to crumble and fall apart. The bridge was closed to vehicles in 1953 and partially restored by the state in the mid-1950s. Additional maintenance occurred in 1979, 1996, 2002, and 2012.

Activities and amenities

In addition to walking over the historic bridge, the state park offers picnicking facilities and fishing in Casselman River. Historic structures to the east of the park include Stanton's Mill, which is listed on National Register of Historic Places, and the restored log cabin craft shops of Spruce Forest Artisan Village.

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