There are 9,170 bridges in this category · Only showing 7,160 bridges with photos
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Pratt truss

The Pratt truss is named after Thomas and Caleb Pratt, Boston railroad engineers who patented the design in 1844. The Pratt and its variations are the most common design of metal truss bridges. On a basic Pratt truss, the diagonals slope toward the center of the bridge, do not cross any verticals, and are approximately parallel. The top chord is straight and parallels the lower chord. The panels can have sub-divisions - or verticals and diagonals that don't reach from the top to bottom chord, though this can be considered a variation of the basic type. There are many variations, or sub-types of the Pratt truss, some of which have their own name including Parker, camelback, Pennsylvania, Baltimore, and others. It is used in bridges as a through truss, pony truss, and deck truss.


Milford Bridge (Somerset County, Pennsylvania)
Built 1900
Pratt pony truss bridge over Coxes Creek on Abandoned TR486
Open to pedestrians

Milford Bridge (Decatur County, Indiana)
Built ca. 1910; replaced 1995
Lost pony truss bridge over Clifty Creek on CR 100 N at 100N-800W
Replaced by new bridge

Milford Bridge (Kosciusko County, Indiana)
Replaced 1980
Lost Half-hip Pratt pony truss bridge over Turkey Creek on Main Street (Old SR 15)
Replaced by new bridge

Military Road Bridge (Older) (Woodbury County, Iowa)
Built 1882; Camelback built by South Dakota to replace pile trestle later; Replaced 1923
Lost Pratt through truss bridge over Big Sioux River on Road
Replaced by a new bridge

Military Street Bridge (Old) (St. Clair County, Michigan)
Built 1884; replaced 1914
Lost Pratt through truss bridge over Black River on Military Street
Demolished and replaced

Milk River Bridge (Blaine County, Montana)
Built 1930
Through truss bridge over Milk River on CR 300
Open to traffic

Mill Bridge (Faulkner County, Arkansas)
Built 1921; bypassed 1993
Lost through truss bridge over Cadron Creek on Mill Bridge Road (CR 280)
Replaced by new bridge

Mill Bridge (Westmoreland County, Pennsylvania)
Built 1938; rehabilitated 1992
Through truss bridge over Kiskiminetas River on Mill Bridge Road in West Leechburg
Open to traffic

Mill City Trail - North Fork Santiam River Bridge (Marion County, Oregon)
Built 1888 near San Jose, CA, Relocated to Mill City 1919.
Pratt through truss bridge over North Fork Santiam River on Mill City Trail
Open to pedestrians

Mill Creek Bridge (Cherokee County, Iowa)
Built 1891 by the George E. King Bridge Co.; bypassed in 2006 but appears to remain
Through truss bridge over Mill Creek on Old IA 21
Bypassed by a new bridge on a different alignment and abandoned

Mill Creek Bridge (Wabaunsee County, Kansas)
Built ca. 1935
Through truss bridge over Mill Creek on Willard Road, 1.0 mi. east and 0.2 mi. north of Maple Hill
Open to traffic

Mill Creek Bridge (Clarion County, Pennsylvania)
Built ca. 1910; Replaced 2003
Pony truss bridge over Mill Creek on Old State Rd
Replaced by a new bridge

Mill Creek Bridge (Venango County, Pennsylvania)
Built ca. 1885 by the Smith Bridge Co.
Lost Pratt pony truss bridge over Mill Creek on TR 522 (Dotter Road)
Replaced by a new bridge on the old substructure

Mill Creek Bridge (Crawford County, Indiana)
Built 1885; rehabilitated 2000
Through truss bridge over Mill Creek on CR 220 East
Open to traffic

Mill Creek Bridge (Lincoln County, Missouri)
Built 1887 by the St. Louis Bridge & Iron Co.; replaced 1995
Lost wrought iron pony truss bridge over Mill Creek on S. Mill Creek Road
Replaced by new bridge

Mill Creek Bridge (Putnam County, Indiana)
Built 1925; rehabilitated 1985
Pony truss bridge over Mill Creek on CR 450 South
Open to traffic

Mill Creek Bridge (Jackson County, West Virginia)
Built 1922
Through truss bridge over Mill Creek on CR 25
Open to traffic

Mill Creek Bridge (Jackson County, West Virginia)
Built 1926
Through truss bridge over Mill Creek on WV 87
Replaced by a new bridge

Mill Creek Bridge (Bourbon County, Kansas)
Abandoned Pratt through truss bridge over Mill Creek in Fort Scott
Collapsed

Mill Creek Bridge (Owen County, Indiana)
(Main design: Pratt through truss)
Built in 1885 by the Wrought Iron Bridge Company with pony truss added ca.1910; replaced in 1989
Lost Pratt through truss bridge over Mill Creek on CR 1150N


Mill Creek Bridge (Adams County, Illinois)
Built 1894; replaced 1982
Lost Pratt through truss bridge over Mill Creek on Herleman Road (TR 76)
Replaced by new bridge

Mill Creek Bridge (Cherokee County, Iowa)
Built 1917
Through truss bridge over Mill Creek on L Avenue
Open to traffic

Mill Creek Bridge (Cedar County, Iowa)
Built 1889; Abandoned mid 1970's; Failed relocation to Lowden in 1996; Relocated 2020
Abandoned pratt pony truss bridge over Mill Creek On Plum Avenue
Removed and relocated to Whitetails Saloon

Mill Creek Bridge (Jackson County, Illinois)
Abandoned pony truss bridge over Mill Creek on Jacobini Road (Forest Road 377)
Wrecked following a flash flood

Mill Creek Bridge (Rock Island County, Illinois)
Lost Pratt through truss bridge over Mill Creek on Road
Replaced by a new bridge

Mill Creek Covered Bridge 35-80-63 (Union County, Ohio)
Built 2010
Pratt through truss bridge over Mill Creek on Thompson Road
Open to all traffic

Mill Creek CR 321 Bridge (Holt County, Missouri)
Built ca. 1920
Pony truss bridge over Mill Creek on CR 321
Open to traffic

Mill Creek CR 399 Bridge (Andrew County, Missouri)
Built 1925
Pony truss bridge over Mill Creek on CR 399
Open to traffic

Mill Creek Old US 36 Bridge (Caldwell County, Missouri)
Built 1922
Pony truss bridge over Mill Creek on Old US 36
Open to traffic

Mill Creek Road Bridge (Lehigh County, Pennsylvania)
Built 1876; Replaced 1975
Lost Pratt pony truss bridge over Jordan Creek on Mill Creek Road (SR 4009)
Replaced by new bridge

Mill Creek, Naans Branch (Owen County, Indiana)
Built c. 1905; Replaced in 1989
Lost Pratt Pony Truss
Replaced by a new bridge

Mill Creek-Fox Road Bridge (Washington County, Kansas)
Built ca. 1910
Pony truss bridge over Mill Creek on G-10.5 81, 0.5 mi. north and 2.5 mi. east of Haddam
Open to traffic

Mill Grove Bridge (Owen County, Indiana)
(Main design: Pratt through truss)
Rehabilitated 2005
Through truss bridge over Mill Creek on CR 100 East (Tower Road)
Open to traffic

Mill Grove Road Bridge (Stephenson County, Illinois)
Built 1931
Pony truss bridge over Yellow Creek on S. Mill Grove Road, 3 mi. southeast of Pearl City
Open to traffic

Mill Mountain Road Bridge (Luzerne County, Pennsylvania)
Built 1883 by the Penn Bridge Co.; rehabilitated 2011
Pony truss bridge over Nescopeck Creek on Mill Mountain Road (TR 356)
Intact but closed to all traffic

Mill Road Bridge (Vanderburgh County, Indiana)
Built ca.1875 by the Columbia Bridge Works
Lost Pratt pony truss bridge over Little Creek on Mill Road (old alignment)
Replaced by a new bridge and road later realigned.

Mill Road Bridge (Livingston County, New York)
Former State Route 39 Bridge before highway rerouted to the east.
Pratt pony truss bridge over Little Conesus Creek on Wadsworth Park Trail
Open to pedestrians

Mill Road Bridge (Hunterdon County, New Jersey)
Built 1900; rehabilitated 2005
Pony truss bridge over Rockaway Creek on Mill Road
Open to traffic

Mill Road Bridge (Schenectady County, New York)
Relocated ca. 1983 from Parish, NY
Pratt pony truss bridge over Unnamed brook on Pedestrian Path
Open to pedestrians only

Mill Road Bridge in Evansburg State Park (Montgomery County, Pennsylvania)
Built ca. 1895; rehabilitated ca. 1985
Pony truss bridge over Skippack Creek on PA 4005 (Mill Road) in Evansburg State Park
Open to traffic

Mill Rock Bridge (Jackson County, Iowa)
Built 1913; Replaced 1995
Lost Pratt through truss bridge over Big Bear Creek on 33rd Avenue in Monmouth Township
Replaced by new bridge

Mill Shoals Bridge (White County, Illinois)
Through truss bridge over Skillet Fork west of Mill Shoals on CR 2500 (FAS 878), 0.5 mi. west of Mill Shoals
Closed to all traffic

Mill Stream Bridge (Schenectady County, New York)
Lost circa 1930
Lost through truss bridge
Demolished

Mill Street (Rat River) Bridge (Forest County, Wisconsin)
Pinned Pratt pony truss bridge over Rat River on Private industrial road
Open to private traffic

Mill Street - Prairie River Bridge (Lincoln County, Wisconsin)
Lost Pratt through truss bridge over Prairie River on Mill Street
Replaced by a new bridge in 1976

Mill Street Bridge (Tama County, Iowa)
Built 1911; Replaced 2013
Through truss bridge over Wolf Creek on Mill Street in Traer
Replaced by a new bridge

Mill Street Bridge (Miami County, Kansas)
Built ca. 1920, Demolished Ca. 2017.
Through truss bridge over Marias Des Cygnes River on 347th Street, 1.3 mi. east of Osawatomie
Lost

Mill Street- Kishequa(sic) Creek Bridge (Livingston County, New York)
Lost Pratt pony truss bridge over Keshequa Creek on Mill Street
Replaced by a new bridge

Millard's Bridge (Hamilton County, Iowa)
Built ?; Replaced 1923
Lost Pratt through truss bridge over Boone River on Webster City RFD No. 6
Replaced by a new bridge

Millbrook Bridge (Kendall County, Illinois)
Built 1897. Bypassed by a new bridge in 1984; closed to pedestrians 2015; demolished 2020
Pratt through truss bridge over Fox River on former alignment of Whitfield Road
Demolished on 24-25 August, 2020

Miller Bridge (Butler County, Missouri)
Built 1902 by the Interstate Bridge Co.; replaced 1998
Lost through truss bridge over Cane Creek on CR 448 west of Poplar Bluff
Replaced by a concrete span

Miller Bridge (Madison County, Iowa)
Relocated Pratt pony truss sitting on dry land
Open to pedestrians

Miller Bridge (Original Location) (Madison County, Iowa)
Built 1884
Pony truss bridge over North River on McBride Road
Open to pedestrians

Miller Creek Bridge (Alexander County, Illinois)
Built 1933
Pony truss bridge over Miller Creek on Old Illinois Route 3 northeast of Thebes, 1 mi. north of Thebes
Open to two-lane traffic

Miller Farm Bridge (Venango County, Pennsylvania)
Built 1888 by Massillon Bridge Co.
Through truss bridge over Oil Creek on TR 635 (Miller Farm Road)
Open to traffic

Miller's Grove Bridge (Richland County, Wisconsin)
Lost Pratt through truss over Pine River on Seminary Street.
Replaced by a new bridge

Millersville Bridge (Cape Girardeau County, Missouri)
Opened to traffic Oct. 5, 1924; rehabilitated 1975; replaced Fall 2009
Lost two-span through truss bridge over Whitewater River on MO 72 at Millersville
No longer exists

Millport Route M Bridge (Knox County, Missouri)
Built 1954 to replace the collapsed Millport Covered Bridge; replaced 2012
Lost pony truss on Route M near Millport over Middle Fork Fabius River
Replaced by a new bridge

Mills Mills Road Bridge (Allegany County, New York)
Lost Pratt through truss bridge on Mills Mills Road
Replaced by a new bridge

MILW - Adel Bridge (Old) (Dallas County, Iowa)
Built ?; Replaced 1943 with a pair of relocated spans
Lost Pratt through truss bridge over North Raccoon River on Chicago, Milwaukee, St. Paul & Pacific Railroad
Replaced by a new bridge

MILW - Cedar River Bridge (Mower County, Minnesota)
Built 1886, Relocated Here 1911; To become a trail
Abandoned pratt through truss bridge over Cedar River on abandoned Milwaukee Road railroad
Abandoned

MILW - Cedar River Bridge #1 (King County, Washington)
Built 1907-1909
Through truss bridge over Cedar River on Private Road
Open to Seattle Public Utilities only

MILW - Cedar River Bridge (Original) (Linn County, Iowa)
Built 1881, Rebuilt 1900; Replaced 1905
Lost Bridge over Cedar River on Railroad (MILW)
Replaced by a new bridge

MILW - Cheyenne River Bridge (Pennington County, South Dakota)
Built 1907
Pratt through truss bridge over Cheyenne River on Former CMStP&P Railroad
Intact but closed to all traffic

MILW - Clark Fork River Bridge (Mineral County, Montana)
Abandoned warren deck truss bridge over Clark Fork River on Milwaukee Road
Abandoned

MILW - Granger High Bridge (Dallas County, Iowa)
Built 1881, Trestle work done 1893, Removed 1944
Pratt deck truss bridge over Des Moines River on Railroad (MILW)
Removed

MILW - Indian Creek Bridge (Old) (Linn County, Iowa)
Built ?; Replaced 1915
Lost Pratt deck truss bridge over Indian Creek on Chicago, Milwaukee, St. Paul & Pacific Railroad
Replaced by a new bridge

MILW - Maple River Bridge (Blue Earth County, Minnesota)
Built 1897, Relocated Here in 1910
Abandoned pratt through truss bridge over Maple River on Abandoned Milwaukee Road Railroad
Derelict/abandoned, possibly on private property

MILW - Mendota Swing Bridge (Hennepin County, Minnesota)
(Main design: Warren through truss)
Approach Spans built 1894, swing span built 1900; Removed 1957
Lost Warren through truss bridge over Minnesota River on Former Milwaukee Road
Removed but not replaced

MILW - Millrace Bridge (Wapello County, Iowa)
Built 1894; Removed ca. 1937 when the millrace was being filled in.
Lost Pratt through truss bridge over Millrace on Chicago, Milwaukee, St. Paul & Pacific Railroad
Removed

MILW - North Skunk River Bridge (Keokuk County, Iowa)
Line abandoned 1979, bridge removed shortly thereafter
Lost Pratt through truss bridge over North Skunk River on former Milwaukee Road
Demolished

MILW - Preston Bridge (Fillmore County, Minnesota)
Lost Pratt through truss bridge over South Branch Root River on Chicago, Milwaukee, St. Paul & Pacific Railroad
Removed but not replaced

MILW - Rock River Bridge (Old) (Ogle County, Illinois)
Built 1897, Replaced 1910
Lost Pratt through truss bridge over Rock River on Former Chicago, Milwaukee St. Paul & Pacific Railway
Replaced by a new bridge

MILW - Sabula Bridge (Old) (Jackson County, Iowa)
Built 1881; Replaced 1906
Lost Pratt through truss bridge over Mississippi River on Chicago, Milwaukee, St. Paul & Pacific Railroad
Replaced by a new bridge

MILW - Skunk River Bridge (Old) (Story County, Iowa)
Built 1907, Replaced 1912
Lost Pony truss bridge over South Skunk River on Railroad (MILW)
Replaced by a new bridge

MILW - Trent Bridge (Moody County, South Dakota)
Lost Pratt pony truss bridge over Big Sioux River on abandoned railroad
Removed but not replaced

MILW - Upper Iowa River Bridge (Old) (Allamakee County, Iowa)
Replaced 1986
Lost Pratt through truss bridge over Upper Iowa River on Chicago, Milwaukee, St. Paul & Pacific Railroad
Replaced by a new bridge

MILW - Wapsipinicon River Bridge (DeWitt) (Scott County, Iowa)
Built 1910; Abandoned & Removed 1931
Pratt through truss bridge over Wapsipinicon River on Chicago, Milwaukee, St. Paul & Pacific Railroad
Removed

MILW - Wisconsin River Bridge (Marathon County, Wisconsin)
Built 1894; Replaced 1980
Lost Pratt through truss bridge over Lake Du Bay (Wisconsin River) on Railroad (MILW) and SR 34
Replaced by a new bridge

Milwaukee Avenue Viaduct (Old) (Cook County, Illinois)
(Main design: Through truss)
Built 1873; replaced 1914
Lost Through truss bridge over Chicago, Milwaukee & St. Paul Railroad on Milwaukee Avenue
Replaced by a new bridge

Mine Road Bridge (Mercer County, New Jersey)
Built 1885; rehabilitated 1976; rehabilitated ~2011,portal damaged by falling tree in 2017 - closed since
Through truss bridge over Stony Brook on Mine Road
Intact but closed to all traffic

Mineola Bridge (Montgomery County, Missouri)
Probably replaced 1925 by a new truss bridge (also since replaced) on US 40
Lost through truss bridge over Loutre River at Mineola
Replaced by new bridge

Miner Street Bridge (Clear Creek County, Colorado)
Built 1902 by Kuyes and Work. Reconstructed 1990 (the trusses are no longer load-bearing).
Reconstructed pony truss bridge over Clear Creek on Miner Street in Idaho Springs
Open to traffic

Mineral Creek Bridge (Allamakee County, Iowa)
Built 1915
Pony truss bridge over Mineral Creek on Mineral Creek Drive
Open to traffic

Mineral Springs Rd.-PA RR Underpass (Wayne County, Indiana)
Built ca. 1910
Lost Pratt deck truss bridge over Pennsylvania Railroad on Mineral Springs Road
Removed and filled to street level

Minerva Creek Bridge (Marshall County, Iowa)
Built ca. 1920
Through truss bridge over Minerva Creek on Jessup Avenue
Open to traffic

Mingo Creek-Apache St Bridge (Tulsa County, Oklahoma)
Pratt bedstead pony truss bridge over Mingo Creek on Apache St
Closed

Minnesota Valley State Trail - Chaska Swing Bridge (Carver County, Minnesota)
Built 1905, Approach Replaced 1911, Imploded August 1996 due to sinking pier
Lost Pratt through truss bridge over Minnesota River
Removed

Mint Boulevard Troy Creek Bridge (Old) (Jefferson County, Iowa)
Replaced/bypassed 1975
Abandoned Pratt pony truss bridge over Troy Creek on Mint Boulevard
Derelict/abandoned

Miscauno Island Bridge (E) (Marinette County, Wisconsin)
Built 1905
Pratt through truss bridge over Menominee River on Miscauno Island Lane
Open to traffic

Miscauno Island Bridge (Middle) (Marinette County, Wisconsin)
Built 1905
Pratt through truss bridge over Menominee River on Miscauno Island Lane
Open to traffic

Miscauno Island Bridge (W) (Marinette County, Wisconsin)
Built 1905
Pratt through truss bridge over Menominee River on Miscauno Island Lane
Open to traffic

Mission Creek Bridge (Brown County, Kansas)
Built 1905
Lost Bedstead pony truss bridge over Mission Creek in Horton
Lost

Mission Creek Bridge (Wabaunsee County, Kansas)
Built ca. 1920
Bypassed pony truss bridge over Mission Creek, 7.0 mi. east and 6.5 mi. north of Eskridge
Open to pedestrians only

Mission Creek Bridge (Osage County, Oklahoma)
Built 1928
Through truss bridge over Mission Creek on D0079
Open to traffic

Mission Creek Bridge (Pawnee County, Nebraska)
Built ca. 1935
Pony truss bridge over Mission Creek on 607 Avenue, 5 mi. west and 8.6 mi. south of Burchard
Open to traffic

Mission Creek-Carlson Rd. Bridge (Shawnee County, Kansas)
Built ca. 1910; Replaced 2015
Through truss bridge over Mission Creek on Carlson Road
Replaced by a new bridge

Missisquoi Valley Rail Trail - Berkshire Bridge (Franklin County, Vermont)
Built 1900 by American Bridge Co.; Inactive 1984-1988; Abandoned 1992; Converted to rail-trail use in 1994
Pin connected Pratt through truss bridge over Missisquoi River on Missisquoi Valley Rail Trail
Open to pedestrians only

Missisquoi Valley Rail Trail - Sheldon Junction Bridge (Franklin County, Vermont)
Built 1900 by American Bridge Co.; One span destroyed 1984; Re-purposed for rail trail use in 1994
Pin connected Pratt through truss bridge over Missisquoi River on Missisquoi Valley Rail Trail
Open to pedestrians only

Mississippi County Road 307 Bridge (Mississippi County, Missouri)
Built 1921
Pony truss on CR 307 (Old US 60) near Birds Point over a drainage ditch emptying into Brewer Lake
Intact but closed to all traffic