Navajo Bridge is the name of twin steel spandrel arch bridges that cross the Colorado River in the Grand Canyon National Park in northern Coconino County, Arizona, United States. The newer of the two spans carries vehicular traffic on U.S. Route 89A (US 89A) over Marble Canyon between Bitter Springs and Jacob Lake, allowing travel into a remote Arizona Strip region north of the Colorado River including the North Rim of Grand Canyon National Park.
The Huey P. Long Bridge, located in Jefferson Parish, Louisiana, is a cantilevered steel through-truss bridge that carries a two-track railroad line over the Mississippi River at mile 106.1 with three lanes of US 90 on each side of the central tracks. It is several kilometers upriver from the city of New Orleans. The East Bank entrance is at Elmwood, Louisiana, and the West Bank at Bridge City.
Echo Bridge is a historic masonry bridge spanning the Charles River between Needham to Newton Upper Falls, Massachusetts, and Ellis Street in Newton. The bridge carries the Sudbury Aqueduct and foot traffic, and is located in the Hemlock Gorge Reservation. At the time of its construction in 1875–1877 it was the second longest masonry arch in the country. It was listed on the National Register of Historic Places in 1980, and was named an American Water Landmark in 1981.
The Bollman Truss Railroad Bridge at Savage, Maryland is the sole surviving example of a revolutionary design in the history of American bridge engineering. The 160-foot (48.8 m) double-span is a suspension truss bridge. The first Bollman bridge was installed on the site; however, the current bridge is not the original. The current bridge was built in 1852 and moved to the site thirty years later. It is one of the oldest standing iron railroad bridges in the United States. Currently, however, it is in use carrying the Savage Mill Trail across the Little Patuxent River.
The Colorado River Bridge at Bastrop is a 1,285-foot (392 m)-long bridge with three steel truss spans and concrete piers that crosses the Colorado River as part of Loop 150 through Bastrop, Texas. The three bridge spans over the river consist of identical Parker through trusses, each 192 feet (59 m) in length, supported on concrete piers. The bridge is one of the earliest surviving uses of the Parker truss in Texas.
The Lamar Boulevard Bridge is a historic arch bridge carrying Texas State Highway Loop 343 over Lady Bird Lake in downtown Austin, Texas, United States. The bridge features six open-spandrel concrete arches spanning 659 feet (201 m) and carries tens of thousands of vehicles daily across the lake. Completed in 1942, the Lamar Boulevard Bridge was the second permanent bridge to cross the Colorado River, and one of the last Art Deco-style open-spandrel concrete arch bridges built in Texas. The bridge was named an Austin Landmark in 1993 and added to the National Register of Historic Places in 1994.
The original Maroon Creek Bridge is a steel trestle along State Highway 82 at the western boundary of Aspen, Colorado, United States. It was designed by George S. Morison in 1888 for the Colorado Midland Railroad, one of the last viaducts in Colorado built for a standard gauge mountain railroad in the 19th century. Of the five steel bridges the Midland built, it is the only one still extant. Due to the later removal of most track and the rail depots, the bridge is the most visible remnant of rail service to Aspen. In 1985 it was listed on the National Register of Historic Places along with other highway bridges in the state, including the Sheely Bridge, also in Aspen.
The Black Squirrel Creek Bridge carries U.S. 24 over Black Squirrel Creek in El Paso County, Colorado. Prior to 2012, it was locally known as the "green bridge" or "old green bridge"—a historic single-span, Parker through truss bridge that was completed in 1935 and listed on the National Register of Historic Places in 2002. Because it no longer met highway safety standards, the bridge was dismantled and replaced by a newer span in 2012.
19th Street Bridge is a two-span through Pratt truss road bridge in Denver, Colorado, over the South Platte River, now used for pedestrians. It was built in 1888 to replace a wooden structure and carried automobile traffic until 1986. The bridge is listed on the National Register of Historic Places.
This is a list of the National Register of Historic Places listings in Montrose County, Colorado.
The Colorado Department of Highways is the antecedent of today's Colorado Department of Transportation.
The Cameron Suspension Bridge crosses the Little Colorado River at Cameron, Arizona, United States.
Four historic bridges on the Big Thompson River in Larimer County, Colorado survived its flood of 1976, but since have lost most of their historic integrity. They were built in 1933 and 1937. All four were listed on the National Register of Historic Places in 2002, and two were delisted in 2010.
The Plum Bush Creek Bridge, near Last Chance, Colorado, is a concrete rigid frame bridge that is listed on the National Register of Historic Places. It brings US 36 across Plum Bush Creek and is located at milepost 138.16 of US 36. It was designed by Colorado Department of Highways and built by Peter Kiewit Sons Construction Co. in 1938. It was listed on the National Register of Historic Places (NRHP) in 2002.
The Beaver Bridge in Beaver, Arkansas, is a historic one-lane suspension bridge carrying Arkansas Highway 187 over the White River at Table Rock Lake. Built in 1949 by the Pioneer Construction Company, the structure is the only suspension bridge open to traffic in Arkansas. The Beaver Bridge was added to the National Register of Historic Places in 1990.
Gunnison River Bridge I and Gunnison River Bridge II are two 129 feet (39 m) long bridges built during 1926–27. They were separately listed on the National Register of Historic Places in 2002.
The Morley Bridge, also known as the Romley Bridge, located near Romlee in Chaffee County, Colorado, is a wrought-iron pin-connected Pratt truss bridge that was built in 1881. It was listed on the National Register of Historic Places in 2003.
The Little Thompson River Bridge, in Weld County, Colorado near Berthoud, Colorado, was built in 1938. It was listed on the National Register of Historic Places in 2002.
The North St. Vrain Creek Bridge, in Lyons, Colorado, was built in 1955. It was listed on the National Register of Historic Places in 2002.
SH 90 
