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Center Pivot Swing Span

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A center pivot Swing Span is a type of swing bridge where a large span is balanced across a swing pier, keeping equal weight on both sides. The span is continuous.

11th Street Bridge (Old) (Pierce County, Washington)
Built 1894; Replaced 1913
Lost Pratt through truss bridge over Tacoma Narrows on East 11th Street
Replaced by a new bridge

20 Mile Bend Bridge (Palm Beach County, Florida)
Built 1937
Warren through truss swing bridge over C-51 Canal on CR-880 (Canal Street)
Open to traffic

AMTK - Spuyten Duyvil Bridge (New York County, New York)
Built 1900
Baltimore through truss bridge swing bridge over Spuyten Duyvil Creek on Amtrak Empire Corridor
Rebuilt in 2018

Arsenal Bridge (1896) (Scott County, Iowa)
Built 1896, Rehabilitated 1983 & 1997
Baltimore through truss bridge over Mississippi River on 2 lanes of traffic and 2 rail lines in Davenport
Open to traffic

Bacon Island Bridge (San Joaquin County, California)
Built 1906, moved to this location 1950, replaced 1995
Swing bridge over Middle River on S. Bacon Island Road
Lost, replaced by new bridge

Bay Farm Island Bridge (1898) (Alameda County, California)
Built 1898; replaced 1953
Lost Polygonal Warren through truss bridge over San Leandro Bay on Bay Farm Island
Replaced by a new bridge

Bay St. Louis Rail Bridge (Harrison County, Mississippi)
Through truss swing bridge over Bay of St Louis on CSX Railroad
Open to traffic

Bishop Cut Bridge (San Joaquin County, California)
Built 1989
Swing bridge over Bishop Cut (White Slough) on Eight Mile Road
Open to traffic

Blackburn Point Bridge (Sarasota County, Florida)
Built 1925; rehabilitated 1995
Swing bridge over Intracoastal Waterway on CR 789 in Osprey
Open to traffic

BN - 15th Street Bridge (1914) (Pierce County, Washington)
Built 1914; Abandoned 1973 due to damage from an erroneously routed Boeing load, likely removed shortly thereafter.
Lost Pratt through truss bridge over Foss Waterway on Burlington Northern Railroad
Removed but not replaced

BN - Hoquiam River Bridge (Grays Harbor County, Washington)
Built 1915, Girder added 1938
Abandoned through truss bridge over Hoquiam River on Abandoned Burlington Northern Railroad
Abandoned

BNSF - Columbia River Bridge (Clark County, Washington)
Built 1908
Swing span through truss bridge over the Columbia River
Open to traffic

BNSF - Ebey Slough Bridge (Snohomish County, Washington)
Built 1906
Swing bridge over Ebey Slough on BNSF Railroad, MP 38.37, Bellingham Subdivision.
Open to traffic

BNSF - Nooksack River Bridge (Whatcom County, Washington)
Open deck through truss bridge over Nooksack River at Ferndale, WA. on BNSF Railroad, MP 105.7, Bellingham Subdivision.
Open to traffic

BNSF - Oregon Slough Bridge (Multnomah County, Oregon)
Built 1908
Swing span through truss bridge over Columbia River - Oregon Slough on BNSF Railway in Portland
Open to traffic

BNSF - Snohomish River Bridge (Snohomish County, Washington)
Built 1922
Warren through truss swing bridge over Snohomish River on BNSF Railway
Open to traffic

BNSF - Steamboat Slough Bridge (Snohomish County, Washington)
Built 1922
Swing bridge over Steamboat Slough on BNSF Railroad
Open to traffic

BO - Harmar Bridge (Washington County, Ohio)
Built 1913; purchased from B&O for $10 and converted to pedestrian use 1967; Rehabbed in 2007
Pratt through truss bridge with manual swing draw span over Muskingum River on Railroad now pedestrian only
Closed to all traffic.

BO - Harmar Bridge (1873) (Washington County, Ohio)
Built 1873 to replace Butler Street Bridge; two central spans destroyed by flood 1884
Lost Pratt through truss bridge over Muskingum River on Baltimore and Ohio Railroad
Destroyed by flooding

BO - Harmar Bridge (Pre 1913) (Washington County, Ohio)
Destroyed in 1913 flood
Lost Pratt through truss bridge over Muskingum River on Baltimore and Ohio Railroad
Destroyed by flooding

Bridge Street Muskingum River Bridge (Muskingum County, Ohio)
Built 1953; rehabilitated 1971, rehabilitated 1979, demolished 2020
Lost through truss bridge over Muskingum River on Bridge Street between Philo and Duncan Falls
Replaced by a new bridge

Butler Street Bridge (Washington County, Ohio)
Built 1856-1859; replaced 1873
Lost Burr arch-truss bridge over Muskingum River on Baltimore and Ohio Railroad
Replaced by a new bridge

Butte City Bridge (1948) (Glenn County, California)
Built 1948; rehabilitated 1961
Howe Through truss swing bridge over Sacramento River on CA 162/Biggs-Willows Road
Open to traffic

California & Oregon - Tehama Bridge (Tehama County, California)
Built 1871, "Washed out" 1881, Replaced 1898
Lost Howe through truss bridge over Sacramento River on California & Oregon Railroad
Destroyed by flood

Catching Slough Bridge (Coos County, Oregon)
Built 1936. Replaced 1995
Lost Warren pony truss swing span bridge over Catching Slough on Coos River Road
Replaced by a new bridge

CBR - Coos Bay Bridge (Coos County, Oregon)
Built 1914
Swing through truss bridge over Coos Bay on the Coos Bay Rail Link (CBR) in North Bend
Open to traffic

CBR - Siuslaw River Bridge No. 7 (Lane County, Oregon)
Built 1914, 2007 CORP Coos Bay Line Closed, Re-opened 2011
Swing span bridge over Siuslaw River on the Coos Bay Rail Link (CBR) in Cushman
Open to traffic

CBR - Umpqua River Bridge (Douglas County, Oregon)
Built 1914, 2007 CORP Coos Bay Line Closed, Re-opened 2011
Pratt through truss bridge with Warren swing span over Umpqua River Bridge on the Coos Bay Rail Link (CBR) in Reedsport
Open to traffic

CCT - Rough and Ready Island Bridge (San Joaquin County, California)
Subdivided Warren through truss bridge over San Joaquin River on Central California Traction Co.
Open to traffic

CN - Four Track Swing Bridge (Ashtabula County, Ohio)
Built 1910
Through truss bridge over Conneaut Creek on Canadian National Railroad w highway single lane
Open

CNW - Kasota Drawbridge (Nicollet County, Minnesota)
Built 1880 and 1909
Lost Lattice deck truss bridge over Minnesota River on Chicago & Northwestern Railway
Removed but not replaced

Colusa Bridge (Colusa County, California)
Built in 1901; rehabilitated in 1947-8, replaced 1980
Pratt through truss swing bridge over Sacramento River on Bridge Street
Bridge replaced 1980

Connection Slough Swing Bridge (San Joaquin County, California)
Built 1905
Pratt through truss bridge over Middle River on S Bacon Island Road
Open to authorized vehicles only

Coquille River Bridge (Coos County, Oregon)
Built 1922, Bypassed 1986, Demolished in 1993
Lost swing span bridge over Coquille River on OR-42S (Fromerly US 101) in Coquille
Removed and salvaged in 1993

Daggett Road Bridge (San Joaquin County, California)
Built 1902
Abandoned Pratt through truss swing bridge over Burns Cutoff (San Joaquin River) on Dagget Road (Port Stockton Expressway)
Abandoned

Darien River Bridge (Old) (McIntosh County, Georgia)
Built 1911 as a railroad bridge; converted to road use 1920-1921; replaced 1944
Lost Polygonal Warren through truss with no verticals bridge over Darien / Altamaha River on US 17
Replaced by a new bridge

Ebey Slough Bridge (Snohomish County, Washington)
Built 1927; replaced with fixed UCEB (ugly concrete eyesore bridge) in 2012
Lost swing bridge over Ebey Slough on WA 529
Replaced by a new bridge

Gardiner-Randolph Bridge (1853) (Kennebec County, Maine)
Built 1850 or 1853 by Stephen Young as four Howe truss spans and one pivot span; two Howe trusses washed out March 2, 1896 and replaced by steel; draw span replaced soon after; last two covered spans replaced 1926
Lost Howe swing pony truss and Howe through truss bridge over Kennebec River on ME-27
Destroyed by flooding

Gaysport Bridge (1889) (Muskingum County, Ohio)
Built 1889 by Smith Bridge Co.; destroyed in 1913 flood
Lost Pratt through truss bridge over Muskingum River on County Road 66
Destroyed by flooding

Gaysport Bridge (1914) (Muskingum County, Ohio)
Built 1914 after previous bridge destroyed in 1913 flood; replaced 1971
Lost Pratt through truss swing bridge over Muskingum River on CR 66
Replaced by new bridge using existing piers

Gianella Bridge (1911) (Butte County, California)
Built 1908-1911; Replaced 1987
Lost swing bridge over Sacramento River on CA 32
Replaced by new bridge

GN - Snohomish River Bridge (Snohomish County, Washington)
Built 1893; Replaced 1910
Bridge over Snohomish River on Great Northern Railway
Replaced by a new bridge

GTW - International Railroad Bridge (Erie County, New York)
Built 1870-1873; completed October 1873; opened November 3, 1873; replaced 1901
Lost Whipple through truss swing bridge over Niagara River on Grand Trunk Railway
Replaced by a new bridge

Harrison Street Bridge (Alameda County, California)
Built in 1898; Removed 1924
Lost Pratt through truss bridge over Oakland Estuary on Harrison Street & Southern Pacific Railroad
Removed

Heron Street Bridge (Grays Harbor County, Washington)
Built 1949
Swing bridge over Wishkah River on US 12 in Aberdeen
Open to traffic

High Street Bridge (1901) (Alameda County, California)
Built 1901; Replaced in 1939
Lost Pratt through truss bridge over Oakland Harbor on High Street
Replaced by a new bridge

Honker Cut Bridge (San Joaquin County, California)
Built 1936; rehabilitated 1975
Swing bridge over Honker Cut (White Slough) on Eight Mile Road
Open to traffic

Hoquiam River Bridge (Old) (Grays Harbor County, Washington)
Lost Lattice through truss bridge over Hoquiam River on 8th Street
Replaced by a new bridge

I Street Bridge (Yolo County, California)
Built 1911
Swing through truss bridge over Sacramento River, carries UP railroad and I Street in West Sacramento
Open to traffic

IER - Oakland Estuary Bridge (Alameda County, California)
Coverted from railroad-only to road vehicle usage in 1951. Replaced by a new bridge in 1974.
Lost Through truss bridge over Oakland Estuary on Interurban Electric Railway
Replaced by a new bridge

KCS - Dorcheat Bayou Bridge (Webster Parish, Louisiana)
Built 1884
Deck plate girder bridge over Loggy Bayou (Dorcheat Bayou) on Illinois Central RR
Open to traffic

Knights Landing Bridge (1902) (Yolo County, California)
Built 1902; Road section removed ca. 1933; Removed ?
Lost Pratt through truss bridge over Sacramento River on Road & Southern Pacific Railroad
Replaced by a new bridge

Lewis & Clark River Bridge (Clatsop County, Oregon)
Built circa 1910; Replaced 1924
Lost Through truss swing-span bridge over Lewis and Clark River on US 101
Replaced by a new bridge

Lincoln Street Bridge (San Joaquin County, California)
Built in 1894; Removed in 1964
Lost Through truss bridge over Mormon Slough on Lincoln Street
No longer exists

Little Potato Slough Bridge (1991) (San Joaquin County, California)
Built 1991
Swing bridge over Little Potato Slough on CA 12 in Terminous
Open to traffic

M Street Bridge (1911) (Sacramento County, California)
Built 1911, Replaced 1934
Lost through truss swing bridge over Sacramento River on M Street
Replaced by a new bridge

MC - Trenton Channel Bridge (Wayne County, Michigan)
Built 1873; replaced 1931
Lost Post through truss bridge over Detroit River (Trenton Channel) on Michigan Central Railroad
Replaced by a new bridge

McConnelsville-Malta Bridge (1901) (Morgan County, Ohio)
Built 1901; partially destroyed in 1913 flood and replaced.
Lost Bridge over Muskingum River
Destroyed by flooding

McConnelsville-Malta Bridge (1913) (Morgan County, Ohio)
Built 1913 by the Oregonia Bridge Co. of Lebanon, Oh.; rehabilitated 1991
Parker through truss swing bridge over Muskingum River on County Road 203 in McConnelsville
Open to traffic

Meridian Bridge (1914) (Sutter County, California)
Built 1914; Replaced 1977
Lost Pratt through truss bridge over Sacramento River on CA 20 & Sacramento Northern Railway
Replaced by a new bridge

Mill Street Bridge (Fountain County, Indiana)
Built 1861; destroyed by tornado 1886 and replaced by a new bridge
Lost covered through truss bridge over Wabash River on Mill Street
Destroyed by severe weather

Mokelumne River Bridge (San Joaquin County, California)
Built 1942; rehabilitated 1978
Swing bridge over Mokelumne River on CA 12
Open to traffic

Navy Drive Bridge (San Joaquin County, California)
Built 1941, replaced 2017
Swing bridge over San Joaquin River on Navy Drive
Replaced by a new bridge

NP - South Fork Willapa River Bridge (Pacific County, Washington)
Built 1912
Through truss bridge over South Fork Willapa River on former Northern Pacific Railroad in Raymond
Derelict/abandoned

NWP - Black Point Bridge (1911) (Sonoma County, California)
Built 1911
Warren through truss bridge over Petaluma River on Northwestern Pacific Railroad
Open to low emission locomotives and cars carrying animal feed and lumber up north four to five times a week.

NYC - Maumee River Bridge (Lucas County, Ohio)
Built 1877 by the Kellogg Bridge Co.; replaced 1902 by Baltimore through truss bridge
Lost Whipple through truss bridge over Maumee River on New York Central Railroad (formerly Lake Shore & Michigan Southern Railroad)
Replaced by a new bridge

Old River Bridge (San Joaquin County, California)
Built 1915; rehabilitated 1978
Swing bridge over Old River on CA 4
Open to traffic

OWR&N - Chehalis River Bridge (Grays Harbor County, Washington)
Built 1911
Pratt through truss swing bridge over Chehalis River on Oregon-Washington Railroad & Navigation Co.
Removed

Park Street Bridge (1891) (Alameda County, California)
Built 1891; replaced 1934
Lost Through truss swing bridge over Oakland Harbor on Park Street
Replaced by a new bridge

PNWR - Blind Slough Bridge (Clatsop County, Oregon)
Built 1895
Warren through truss bridge over Blind Slough on Portland and Western Railroad
Closed

PNWR - Clatskanie River Bridge (Columbia County, Oregon)
Built 1897
Warren through truss swing bridge over Clatskanie River on Portland & Western Railroad (PNWR) in Clatskanie
Open to traffic

PNWR - John Day River Bridge (Clatsop County, Oregon)
Pony truss bridge over John Day River on Portland & Western Railroad
Open to traffic?

PNWR - Willamette River Bridge (Linn County, Oregon)
Built 1921 by the Southern Pacific Railroad
Swing span through truss bridge over Willamette River on Portland and Western Railroad (PNWR) in Albany
Open to traffic

Princeton Swing Bridge (Green Lake County, Wisconsin)
Main span built in 1901; Approach built in 1908 by the American Bridge Co.
Riveted Warren pony truss bridge over Fox River on Recreational trail on former railroad bed
Open to traffic

PSAP - Hoquiam River Swing Bridge (Grays Harbor County, Washington)
Built 1908
Baltimore through truss bridge over Hoquiam River on Puget Sound and Pacific Railroad
Open to traffic

PSAP - Wishkah River Bridge (Grays Harbor County, Washington)
Built 1909
Swing bridge over Wishkah River on Puget Sound and Pacific Railroad
Open to traffic

PSE - Duwamish River Bridge (King County, Washington)
Lost Howe through truss bridge over Duwamish River on Puget Sound Electric Railway
Removed

Putnam Street Bridge (1880) (Washington County, Ohio)
Built 1880; all spans except the swing span destroyed in 1884 flood
Lost Howe pony truss bridge over Muskingum River on Putnam Street Bridge
Destroyed by flooding

Putnam Street Bridge (1884) (Washington County, Ohio)
Built 1884 on piers from 1880 bridge; additional pivot span added ca.1892; replaced 1900
Lost Howe pony truss bridge over Muskingum River on Putnam Street
Replaced by a new bridge

Putnam Street Bridge (1900) (Washington County, Ohio)
Built 1900-1901 on new stone piers; destroyed in 1913 flood
Lost Pratt swing through truss bridge over Muskingum River on Putnam Street
Destroyed by flooding

Putnam Street Bridge (1913) (Washington County, Ohio)
Built 1913; rehabilitated 1951; replaced in 2000
Lost Parker through truss swing bridge over Muskingum River on Putnam Street
Bridge has been replaced.

Rigolets Bridge (Orleans Parish, Louisiana)
Built 1930; replaced 2009
Lost through truss swing bridge over the Rigolets on US 90 in New Orleans
Replaced by new bridge

Riverdale Bridge (Pacific County, Washington)
Built 1924
Lost Through truss bridge over Willapa River on Route 101 Riverdale
No longer exists

Riverton Drawbridge (King County, Washington)
Built 1903 of Douglas Fir & Cedar; Closed 1919; Removed 1927
Lost Double-intersection Warren through truss swing bridge over Duwamish River on Old Military Road
Removed but not replaced

Sacramento-Yolo Bridge (Sacramento County, California)
Built 1858 Destroyed by flood or fire 1869
Lost Deck truss swing bridge over Sacramento River on Broad street
Destroyed by disaster

San Joaquin River Bridge (San Joaquin County, California)
Built 1933
Howe Through truss bridge over San Joaquin River on CA 4
Open to traffic

SP - Dumbarton Bridge (Alameda County, California)
Built 1910, last used for freight 1982; acquired by San Mateo County Transit District 1994
Abandoned baltimore through truss bridge over San Francisco Bay on Caltrain
Abandoned

SP - Newark Slough Drawbridge (Alameda County, California)
Built 1910
Baltimore through truss bridge over Newark Slough on Caltrain; this is the east end of SP Dumbarton Bridge
Closed to all traffic

SP - Willamette River Bridge (Old) (Linn County, Oregon)
Built 1887; Replaced 1921
Lost Howe pony truss bridge over Willamette River on Southern Pacific RR
Replaced by a new bridge

Third Spokane Street Drawbridge (King County, Washington)
Built 1917; Replaced by a new road bridge 1924, streetcar line closed 1928.
Lost Pratt through truss bridge over Duwamish River on Spokane Street & Streetcars
Replaced by a new bridge

Umpqua River Bridge (Douglas County, Oregon)
Built 1936
Swing bridge over Umpqua River on US 101 in Reedsport
Open to traffic

Uncle Sam Bridge (Pre 1909) (Greene County, New York)
Lost Through truss bridge over Catskill Creek on Bridge Street in Catskill.
Replaced by a new bridge

UP - 15th Street Bridge (Pierce County, Washington)
Built 1914; Removed 1983
Lost Through truss bridge over Foss Waterway on 15th Street and Union Pacific Railroad
Removed but not replaced

UP - Mossdale Bridge East (San Joaquin County, California)
Built 1928
Warren through truss swing bridge over San Joaquin River on Union Pacific RR
Open to traffic

UP - Sacramento River Bridge (Tehama County, California)
Built 1898, 1901 Approach Rehabilitation, 1929 Approach truss replacments
Pratt through truss bridge over Sacramento River on Union Pacific Railroad
Open to traffic

UP - Willamette River Bridge (Linn County, Oregon)
Built 1906, Replaced 2013-14
Swing span bridge over Willamette River on Union Pacific Railroad
Replaced by a new bridge

Van Buren Bridge (Benton County, Oregon)
Built 1913
Swing span bridge over Willamette River on OR-34 Eastbound
Open to traffic

WA529 Steamboat Slough Bridge (NB) (Snohomish County, Washington)
Built 1954
Warren swing bridge over Steamboat Slough on WA 529
Open to traffic

Walnut Grove Road Bridge (San Joaquin County, California)
Built 1955
Swing through truss bridge over Mokelumne River on Walnut Grove Road
Open to traffic

Webster Street Drawbridge (1871) (Alameda County, California)
Built 1871; Replaced 1898
Lost Through truss bridge over Oakland Harbor on Webster Street
Replaced by a new bridge

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