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Over a mile long

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Lake Pontchartrain Causeway (St. Tammany Parish, Louisiana)
First bridge built 1956
Pair of prestressed concrete bridges over Lake Pontchartrain with a length of nearly 24 miles
Open to two lanes of toll southbound traffic and two lanes of free northbound traffic

Lavaca Bay Causeway (1931-1961) (Calhoun County, Texas)
Initially built in 1931, the bridge was damaged in 1942 and 1945 by hurricanes, repaired, but effectively destroyed by Hurricane Carla in 1961.
Lost Timber stringer bridge over Lavaca Bay on State Highway 35
Destroyed by storm

Lewis & Clark Bridge (Cowlitz County, Washington)
Built 1929; rehabilitated 2003
Cantilevered through truss bridge over Columbia River on WA 433 at Longview
Open to traffic

Lucin Cutoff Trestle (Box Elder County, Utah)
Built 1904 for the Southern Pacific Railroad, supplanted by an earthen causeway in 1959, closed to traffic in 1993
Lost Timber stringer over Great Salt Lake on Southern Pacific Railroad
Replaced by earthen causeway

MacArthur Bridge (St. Louis, Missouri)
Built 1907-1917 by the City of St. Louis to break the monopoly of the Terminal Railroad Association, which controlled the two other bridges at St. Louis and charged unreasonable tolls. Automobile deck closed to traffic in 1981.
Three-span through truss bridge over the Mississippi River in St. Louis, south of the Poplar Street Bridge
Open to railroad traffic only

Mackinac Bridge (Emmet County, Michigan)
Opened Nov. 1, 1957
Suspension bridge over the Straits of Mackinac on I-75 at Mackinaw City
Open to traffic

Maestri Bridge (Orleans Parish, Louisiana)
Built 1928
Bascule bridge over Lake Pontchartrain on US 11 in New Orleans
Open to traffic

Main Street Bridge (Cuyahoga County, Ohio)
Built 1940 by the Wilbur Watson & Associates; rehabilitated 1992
Deck truss bridge on OH 2 (Main Street) in Cleveland
Open to traffic

Manhattan Bridge (New York County, New York)
Opened to traffic December 31, 1909
Suspension bridge over East River in New York City
Open to seven lanes of highway traffic and four subway tracks

Mathews Bridge (Duval County, Florida)
Built 1953
Cantilever Through truss bridge over St. Johns River on FL 10A in Jacksonville
Open to traffic

McKinley Bridge (St. Louis, Missouri)
Built 1910, closed to traffic in October 2001, reopened in 2007
Through truss bridge over the Mississippi River at St. Louis
Open to traffic

Metropolis Bridge (Massac County, Illinois)
Built 1917 by the American Bridge Co. under the direction of engineers C. H. Cartlidge and Ralph Modjeski
Six-span through truss bridge over the Ohio River on the Canadian National Railway at Metropolis
Open to railroad traffic

MILW Snoqualmie Tunnel (King County, Washington)
Built 1914 by the Chicago, Milwaukee, Saint Paul, and Pacific Railroad. Rehabilitated 2011
Tunnel on Pedestrian trail under Snoqualmie Pass
Open to pedestrians

Moffat Tunnel (Grand County, Colorado)
Built 1923-1928
Tunnel under Continental Divide west of Denver on Union Pacific RR
Open to railroad traffic, including Amtrak's California Zephyr

Morganza Floodway Bridge (Pointe Coupee Parish, Louisiana)
Built 1945
Concrete tee beam bridge over Morganza Floodway on US-190
Open to traffic

Morrison Bluff Bridge (Logan County, Arkansas)
Built 1980. At 1.6 miles this is the longest bridge in Arkansas
Bridge over Arkansas River on AR 109 at Morrison Bluff
Open to traffic

New Chain of Rocks Bridge (Madison County, Illinois)
Built 1966
Bridge over Mississippi River on I 270
Open to traffic

Newark Bay Bridge (Essex County, New Jersey)
Built 1955
Steel through arch bridge over Newark Bay on the NJ Turnpike Extension (I-78) in Newark
Open to traffic

Newark Bay Lift Bridge (Union County, New Jersey)
Built 1926; site of Newark Bay Bridge Accident in 1948; damaged in ship collision 1966; railroad abandoned 1976; lift spans demolished 1980, approach spans demolished 1988
Lost vertical lift bridge over Newark Bay on the Central Railroad of New Jersey
Removed

Newburgh-Beacon Bridge (Orange County, New York)
Built 1963, rehabilitated 1984. Second span built 1980;
Through truss bridge over Grand Avenue, Hudson River on Rte I84
Open to traffic

Newport Bridge (Newport County, Rhode Island)
Built 1969
Suspension bridge over East Passage Narragansett Bay on RI 138 in Newport
Open to toll traffic

Newtown Creek I-278 Bridge (Kings County, New York)
Built 1940; rehabilitated 1973
Through truss bridge over Newtown Creek on I-278 in New York
Open to traffic

Norfolk Southern Railway Lake Pontchartrain Trestle (St. Tammany Parish, Louisiana)
Arguably the longest railroad bridge in the United States
Bridge over Lake Pontchartrain on Norfolk Southern Railway (former Southern Railway)
Open to traffic

Ogdensburg-Prescott International Bridge (St. Lawrence County, New York)
Built 1960
Suspension bridge over St. Lawrence River at Ogdensburg
Open to traffic

Old Chain of Rocks Bridge (St. Louis, Missouri)
Built 1927-1929; opened July 5, 1929, closed to traffic in 1968; reopened for pedestrians on June 5, 1999
Cantilevered through truss bridge over the Mississippi River on Old US 66 just south of the modern I-270 bridge in St. Louis
Open to pedestrians and bicyclists

Old Galveston Causeway (Galveston County, Texas)
Built in 1912 as both an auto and rail crossing to Galveston Island. New road causeway built in 1939 replacing the highway crossing. Bascule span replaced in 2012 with a lift span
Modern lift bridge with concrete arch approach spans over Galveston Bay on BNSF Railway (and former highway)
Open to railroad traffic only

Old Gandy Bridge (Hillsborough County, Florida)
Built 1956
Steel stringer bridge over Tampa Bay on Old US 92 (Presently Friendship Trail)
Closed to pedestrian traffic but is slated to be reopened when bridge is rehabbed

Old Haughton Rd. Bridge (Washington County, North Carolina)
Built 1938
Lost Through truss bridge over Albemarle Sound on NC-32/94
Replaced by a new bridge

Old Vicksburg Bridge (Warren County, Mississippi)
Built 1930
Cantilevered through truss bridge over the Mississippi River at Vicksburg just north of the I-20 bridge in Vicksburg
Closed to all vehicular and pedestrian traffic, but still used by the Kansas City Southern railroad

Paducah Bridge (McCracken County, Kentucky)
Built 1973
Two-span tied-arch bridge on Interstate 24 over the Ohio River between Paducah, KY, and Metropolis, IL
Open to four lanes of traffic

Parkersburg Bridge (Wood County, West Virginia)
Crosses Ohio River between Parkersburg, WV, and Belpre, OH. Constructed between 1868-1870 by B&O railroad. Longest in world upon completion at 7140 feet.
Through truss bridge over Ohio River
Open to traffic

Pascagoula River Bridge (George County, Mississippi)
Built 1948
Cantilevered Warren through truss bridge over Pascagoula River
Open to traffic

Poughkeepsie Railroad Bridge (Dutchess County, New York)
Built 1888 by the Union Bridge Co.; closed to railroad traffic May 8, 1974 due to fire; reopened to pedestrians on Oct. 3, 2009
Massive cantilevered deck truss bridge over the Hudson River between Poughkeepsie and Highland
Open to pedestrians

Pulaski Skyway Bridge (Hudson County, New Jersey)
Built 1932; rehabilitated 1984
Cantilevered through and deck truss bridge over the Passaic and Hackensack Rivers on US 1/US 9 in Jersey City
Open to traffic

Queen Isabella Causeway (Cameron County, Texas)
Built 1974
Steel stringer bridge over Intracoastal Waterway on Pr 100 in South Padre Island
Open to traffic

Rainbow Bridge (Jefferson County, Texas)
Opened Sept. 8, 1938; parallel bridge built 1991; rehabilitated and reopened to northbound traffic in 1998
Through truss bridge over Neches River on Westbound TX 73 in Port Arthur
Open to traffic

Randolph Bridge (Riley County, Kansas)
Built 1962
Stringer bridge over Big Blue River/Tuttle Creek Reservoir on K-16
Open to traffic

Red River Bridge (Tillman County, Oklahoma)
Built 1939
Abandoned stringer bridge over Red River on old US 70 / 183
Abandoned

Reserve Relief Canal Bridge (St. John the Baptist Parish, Louisiana)
Built 1974
Stringer bridge over Reserve Relief Canal on I-10
Open to traffic

Richmond - San Rafael Bridge (Contra Costa County, California)
Built 1956, Seismic Retrofit Completed 2005
Double deck cantilever truss bridge over San Pablo Bay on I-580 in Richmond
Open to traffic

Robert C. Byrd Bridge (Cabell County, West Virginia)
Built 1994, replaced the 6th Street Bridge built in 1926, the first bridge in Huntington (imploded beside this bridge in 1995)
Cantilevered Warren through truss bridge over Ohio River, CSX Railroad
Open to traffic

Robert O. Norris Bridge (Middlesex County, Virginia)
Built 1957; rehabilitated 1996
Cantilever through truss bridge over Rappahannock River on VA 3
Open to traffic

Robertson Tunnel (Multnomah County, Oregon)
Built 1998
Tunnel under the West Hills (Tualatin Mountains) on MAX Light Rail Tracks in Portland
Open to traffic

San Fernando Railroad Tunnel (Los Angeles County, California)
Work started March 22, 1875, opened August 12, 1876.
Tunnel under Freemont Pass/San Fernando Pass on Union Pacific Railroad/Metrolink
Open to traffic

San Francisco - Oakland Bay Bridge (San Francisco County, California)
Built 1936; rehabilitated 1962
Suspension and cantilever truss bridge over San Francisco Bay on I-80 in Oakland
Open to traffic

Santa Susana Tunnel (Ventura County, California)
Finished in 1904, Rebuilt 1922
Tunnel on Union Pacific Railroad
Open to traffic

Second Tacoma Narrows Bridge (Pierce County, Washington)
Built 1950 as the replacement of the original 1940 bridge
Suspension bridge over Tacoma Narrows on WB WA 16 in Tacoma
Open to traffic

Sideling Hill Tunnel (Fulton County, Pennsylvania)
Begun c. 1885 by South Penn. RR; completed 1940 by Penna. Tpk. Comm; bypassed and abandoned 1968
Tunnel on Abandoned alignment of Pennsylvania Turnpike
Unofficially open to hikers and bicyclists

Sidney Lanier Bridge (Glynn County, Georgia)
Built 2002
Cable-stayed bridge over Brunswick River on Sidney Lanier Br in Brunswick
Open to traffic

Silas S. Pearman Bridge (Charleston County, South Carolina)
Built 1966
Lost cantilevered truss bridge over Cooper River on US 17
Replaced by a new bridge

Southern Pacific Carquinez Strait Bridge (Contra Costa County, California)
Originally built for the Southern Pacific Railroad in 1929-1930, this is the last simple truss railroad bridge built in the United States at a new location (i.e. where none had existed before).
Warren through truss bridge over Carquinez Strait on double track of Union Pacific Railroad in Martinez
Open to traffic

St. Clair River Bridge (St. Clair County, Michigan)
Built 1938; rehabilitated 1999
Through truss bridge over St. Clair River on Westbound I-94 in Port Huron
Open to traffic

St. Clair Tunnel (St. Clair County, Michigan)
Built 1888-1891; Electrified 1907-1908; Electrification removed 1958: Tube sealed 1994
Tunnel under St. Clair River on Canadian National Railroad in Port Huron
Closed to all traffic

Summit Tunnel (Placer County, California)
Built by the Central Pacific Railway as part of the original transcontinental railway to finally cross the Sierra's at Donner Pass
Abandoned tunnel on former Central Pacific (later SP) Railroad
Abandoned

Sunshine Bridge (St. James Parish, Louisiana)
Built 1963
Through truss bridge over the Mississippi River on LA 70
Open to traffic

Sunshine Skyway Bridge (Pinellas County, Florida)
Opened to traffic April 20, 1987
Cable-stayed bridge over Tampa Bay on I-275/US 19 at Saint Petersburg
Open to four lanes of traffic

Talmadge Memorial Bridge (Chatham County, Georgia)
Built 1990
Cable-stayed bridge over Savannah River; replaced Old Talmadge Memorial Bridge
Open to traffic

Tappan Zee Bridge (Rockland County, New York)
Opened to traffic December 15, 1955
Cantilevered through truss bridge over Hudson River on I-87/I-287/New York State Thruway in South Nyack
Open to seven lanes of traffic

Thimble Shoal Channel Bridge (Northampton County, Virginia)
Built 1964
Tunnel under Thimble Shoal Channel on Route 13
Open to traffic

Third Tacoma Narrows Bridge (Pierce County, Washington)
Built 2007
Suspension bridge over Tacoma Narrows on EB SR-16 in Tacoma
Open to traffic

Thomas J. Hatem Memorial Bridge (Harford County, Maryland)
Built 1939; rehabilitated 1988
Through arch bridge over Susquehanna River on US 40 in Havre de Grace
Open to traffic

Throgs Neck Bridge (Queens County, New York)
Built 1961
Suspension bridge over East River on I-295 in New York
Open to traffic

Toledo Bend Reservoir Bridge (Sabine Parish, Louisiana)
Built 1967
Girder bridge over Toledo Bend Res. on LA-6, TX-21
Open to traffic

Triborough Suspension Bridge (Queens County, New York)
Opened to traffic July 11, 1936
Suspension bridge over East River (Hell Gate) on I-278 in New York
Open to eight lanes of traffic and one sidewalk

Turnpike Connector Bridge (Burlington County, New Jersey)
Built 1956
Arch-truss bridge on the PA/NJ Turnpike over the Delaware River
Open to traffic

Tuscarora Mountain Tunnel (Huntingdon County, Pennsylvania)
Begun c.1885 by S. Penn. RR; first tube completed 1940 by Penna. Tpk. Comm.; second tube completed 1968.
Tunnel on Pennsylvania Turnpike/I-76
Open to traffic

Twin Bridges (Henderson County, Kentucky)
Northbound bridge built 1932; southbound built 1965
Pair of cantilevered through truss bridges over the Ohio River on US 41. Rehabilitated 2008
Open to traffic

U.P.R.R. - Tunnel No. 41 (Placer County, California)
Built 1925
Tunnel under Donner Pass (Mount Judah) on Union Pacific Railroad
Open to traffic

Verrazano-Narrows Bridge (Richmond County, New York)
Upper level opened November 21, 1964; lower level opened June 28, 1969
Suspension bridge over The Narrows on I-278 between Staten Island and Brooklyn
Open to a total of 12 lanes of traffic

Vicksburg I-20 Bridge (Warren County, Mississippi)
Built 1973
Cantilevered through truss over the Mississippi River on I-20 at Vicksburg
Open to traffic

Vincent Thomas Bridge over the Los Angeles Harbor Main Channel (Los Angeles County, California)
Built 1963; rehabilitated 1990
Suspension bridge over Los Angeles Harbor main channel on CA 47 in Los Angeles
Open to traffic

Virginia Dare Memorial Bridge (Dare County, North Carolina)
Built 2002
Stringer bridge over Croatan Sound on US 64 & US 264
Open to traffic

Wabash Bridge (St. Charles County, Missouri)
Built 1936, replacing an earlier 1871 through truss railroad bridge on a new alignment
Cantilevered through truss bridge over the Missouri River on the Norfolk Southern Railroad, between St. Charles and Bridgeton, Mo.
Open to railroad traffic

Walt Whitman Bridge (Philadelphia County, Pennsylvania)
Built 1957; rehabilitated 1998
Suspension bridge over Delaware River on I-76 in Philadelphia
Open to traffic

Wheeler Dam Bridge (Lawrence County, Alabama)
Built 1937; rehabilitated 1962
Polygonal Warren through truss bridge over Tennessee River on AL 101
Open to traffic

William B. Umstead Memorial Bridge (Dare County, North Carolina)
Built 1955; rehabilitated 1966
Steel stringer bridge over Croatan Sound on US 64
Open to traffic

Williamsburg Bridge (Kings County, New York)
Opened to traffic December 19, 1903
Suspension bridge over East River on Delancey Street in New York
Open to traffic

Woodrow Wilson Memorial Bridge (1932) (Prince George's County, Maryland)
Built 1932; rehabilitated 1984, Replaced 2008
Lost bascule bridge over Potomac River on the Capital Beltway (I-95/I-495) in Fort Washington
Replaced by the 2008 Woodrow Wilson Memorial Bridge

Woodrow Wilson Memorial Bridge (2008) (Prince George's County, Maryland)
Built 2006-2008
Bascule bridge over Potomac River on the Capital Beltway (I-95/I-495) in Fort Washington
Open to traffic

Wright Memorial Bridge (Currituck County, North Carolina)
Built 1966; rehabilitated 1997
Slab bridge over Currituck Sound on US-158 EB
Open to traffic

Zion Park Blvd Tunnel Hwy 9 (Washington County, Utah)
Construction of the 1.1 mile Zion-Mount Carmel Tunnel began in the late 1920's and was completed in 1930. At the time that the tunnel was dedicated, on July 4, 1930, it was the longest tunnel of it's type in the United States.
Tunnel on Hwy 9/Zion Park Blvd
Open