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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.


Old Teter Bridge (Furnas County, Nebraska)
Pratt through truss bridge over Medicine Creek on a pedestrian/golf cart trail
Open to pedestrians and golf carts

Old Third Street Bridge (Cass County, Indiana)
Replaced 1917
Lost through truss bridge over Eel River on Third Street in Logansport
Replaced by new bridge

Old Town Bridge #2 (Gallatin County, Montana)
Built 1894; rehabilitated 1984
Through truss bridge over Jefferson River on CR 201
Open to traffic

Old Town Bridge #3 (Gallatin County, Montana)
Built 1894
Through truss bridge over Jefferson River on CR 419
Open to traffic

Old Trackville Road Bridge (Dearborn County, Indiana)
Built ca. 1910
Abandoned pratt pony truss bridge over East Fork Tanners Creek
Abandoned

Old U.S. 64 Brush Creek Bridge (Polk County, Tennessee)
Built on the old 2-lane alignment of U.S. 64, abandoned and left in place when new alignment in 1967 was built higher, 1/4 mile downstream
Abandoned Pratt through truss bridge over Brush Creek on Pre 1967 alignment of US Highway 64
Abandoned

Old US 287 Bridge (Lewis and Clark County, Montana)
Abandoned pratt through truss bridge over Dearborn River on Road
Abandoned

Old US 31 Bridge (Chilton County, Alabama)
Abandoned pratt pony truss bridge on an abandoned alignment of US 31
Abandoned

Old US 62 Overpass (Tillman County, Oklahoma)
Built 1929; made obsolete by new bridge in 1968
Through truss bridge over BNSF Railroad on E1643/ Old US 62
Closed October 2009/ open to pedestrians

Old US 66 Gasconade River Bridge (Laclede County, Missouri)
(Main design: Parker through truss)
Built 1922-24
Four-spans - 1 Warren Pony truss, 1 Pratt & 2 Parker through truss bridge over Gasconade River on Old US 66 near Hazelgreen.
Intact but closed to all traffic. Under Fundraising by Workin' Bridges

Old US-169 Neosho River Bridge (Neosho County, Kansas)
(Main design: Pratt through truss)
Built ca. 1930
Through truss bridge over Neosho River, 3.13 mi. north of K-39 N. Jct.
Open to traffic

Old US61 Joachim Creek Bridge (Jefferson County, Missouri)
Built 1924; made obsolete by new bridge in 1933; closed to traffic Nov. 21, 2005; main span demolished Dec. 27, 2006; replaced by UCEB in 2007
Lost through truss bridge over Joachim Creek on Joachim Avenue (Old US 61/67) in Herculaneum
Replaced by UCEB

Old Van Patton Bridge (Laurens County, South Carolina)
Abandoned pratt through truss bridge over Enoree River on Old SC 418
Abandoned

Old Vine St. Bridge (Pawnee County, Nebraska)
Built 1925; rehabilitated 1964
Pratt Through truss bridge over Taylor Branch on County Highway
Closed to all traffic

Old Wenatchee Bridge (Chelan County, Washington)
Built 1908; bypassed by new highway bridge in 1950; reopened to pedestrians in 2010
Cantilevered through truss bridge over Columbia River carrying a pedestrian walkway and pipeline
Open to pedestrians

Old Wernle Road Bridge (Wayne County, Indiana)
Unknown
Abandoned Pratt bedstead pony truss over Short Creek on old section of Wernle Road
Derelict/abandoned

Old Williams Road Bridge (Allegany County, Maryland)
Built 1910; rehabilitated 1977
Pratt pony truss bridge over Town Creek on Old Williams Road
Closed to all traffic

Old Witcher Creek Bridge (Kanawha County, West Virginia)
Pony truss bridge over Witcher Creek on Co. Route 60/21 (old us 60)
Intact but closed to all traffic

Old Woodland Park Bridge (Perry County, Kentucky)
Built 1934
Lost through truss bridge over North Fork Kentucky River on KY 2448 in Hazard
Bridge has been replaced.

Old Woodruff Bridge (Navajo County, Arizona)
Built 1917
Pratt pony truss bridge over Little Colorado River on an old alignment of Woodruff Road
Open to pedestrians

Olentangy River CR 67 R (Morral-Kirkpatrick Rd.) Bridge (Marion County, Ohio)
Built 1876 by the Wrought Iron Bridge Co.
Bypassed through truss bridge over Olentangy River on CR 67R (Morral-Kirkpatrick Rd.)
Bypassed, closed to all traffic

Olentangy River N. Market Street Bridge (Crawford County, Ohio)
Lost pony truss bridge over Olentangy River on N. Market Street in Galion
Replaced by new bridge

Olentangy River N. Union Street Bridge (Crawford County, Ohio)
Lost Pony truss bridge over Olentangy River on N. Union Street in Galion
Replaced by a new bridge

Olex Bridge (Gilliam County, Oregon)
Built ca. 1905
Abandoned pratt pony truss bridge over Rock Creek
Abandoned

Olive Branch Bridge (Vermilion County, Illinois)
Pony truss bridge over Olive Branch on TR 365, 5.5 mi. southwest of Fairmount
Collapsed

Omro Swing Bridge (Winnebago County, Wisconsin)
(Main design: Pratt through truss)
Lost Pratt through truss bridge over Fox River on Road
Replaced by a new bridge

Only Bridge (Hickman County, Tennessee)
(Main design: Pennsylvania through truss)
Built 1907 by the Nashville Bridge Co.; Bypassed by a new bridge in 1962.
Derelict through truss bridge over Duck River on TN 50 near Only
Derelict with deck and approaches removed

Ontario Bridge (Lagrange County, Indiana)
Built ca. 1905
Lost Pratt pony truss bridge over Pigeon River on County Road 225E
Replaced by a new bridge

Opie Road Bridge (Somerset County, New Jersey)
Built 1921
Pony truss bridge over South Branch Raritan River on Opie Road
Open to traffic

Opossum Creek Bridge (Nowata County, Oklahoma)
Built ca. 1930
Through truss bridge over Opossum Creek on Old U.S. 169
Replaced by a new bridge

Orange Blossom Trail Bridge (San Bernardino County, California)
Built 1902
Pratt through truss bridge over Drainage on Orange Blossom Trail
Open to pedestrians only

Orange Hill Road Bridge (Knox County, Ohio)
Built 1887 by the Mt. Vernon Bridge Co.; rehabilitated 1985; replaced 2006
Pony truss bridge over Ireland Creek on Orange Hill Road (TR 325)
Replaced by a new bridge

Orange Road Bridge (Delaware County, Ohio)
Built 1898 by the Toledo Bridge Co.; rehabilitated 1970
Through truss bridge over Olentangy River on Orange Road (TR 114) in Powell
Closed and bypassed.

Organ Ferry Bridge (Ralls County, Missouri)
Collapsed due to overloaded semi truck/trailer filled with lard. Disaster occurred early evening, Jan 13, 1956 (a Friday). On MO State Hwy V between New London and Hannibal. Two drivers from Tennessee claimed they were lost and tried to cross.
Lost through truss bridge east of New London, MO
No longer exists, although the both bank abutments and some railing can still be seen just below the water.

Orleans Bridge (Polk County, Missouri)
Through truss bridge over Little Sac River on 505th Road, southeast of Aldrich
Closed to all traffic

Orr Road Bridge (Washington County, Arkansas)
Built 1924
Through truss bridge over Illinois River on Orr Road (CR 67) just off AR 265, southeast of Prairie Grove
Closed

Osage Creek Bridge (Benton County, Arkansas)
Built in 1911 by the Missouri Valley Bridge & Iron Company of Leavenworth, Kansas
Through truss bridge over Osage Creek on CR 71 southeast of Healing Springs
Replaced by new bridge

Osage Creek Bridge (Grant County, Oklahoma)
Bypassed by new bridge 1967
Pratt pony truss bridge over Osage Creek on Old US 81
Open to traffic

Osage Prairie Trail - Hominy Creek Bridge (Osage County, Oklahoma)
Pratt through truss bridge over Hominy Creek on Osage Prairie Trail
Open to pedestrians

Osage Road Spring Creek Bridge (Clay County, Kansas)
Built 1903
Pratt through truss bridge over Spring Creek, 2.0 mi. north and 6.0 mi. west of Green
Open to traffic

Osage Valley Road Bridge (Cooper County, Missouri)
Built 1913; rehabilitated 1993
Pony truss bridge over Petite Saline Creek on Osage Valley Road
Open to traffic

Osborn Road Bridge (Tehama County, California)
Built 1960; rehabilitated 1984
Pratt Pony truss bridge over Mill Creek on Osborn Road
Open to traffic

Osborne Covered Bridge (Clayton County, Iowa)
(Main design: Through truss)
Lost Through truss bridge over Volga River on Road
Removed

Osborne Road Bridge (Osage County, Kansas)
Built ca. 1910
Abandoned through truss bridge over 110 Mile Creek, 2.5 mi. north and 0.7 mi. east of Quenemo
Closed to all traffic

Osceola Bridge (St. Clair County, Missouri)
Lost circa 1970
Lost two-span through truss bridge over Osage River at Osceola
Demolished with the creation of Truman Reservoir

Osiris Bridge (Cedar County, Missouri)
Built 1911 by the Canton Bridge Co.; replaced 2006
Lost pony truss bridge over Horse Creek on CR 1600
Replaced by a new bridge

Ost Valle Bridge (Grand Forks County, North Dakota)
Built 1910
Through truss bridge over an Unnamed tributary of Red River on a 8th Avenue NE, 1 mi. north and 6 mi. east of Thompson in Walle Township
Open to traffic

Oswald Bridge (Madison County, Illinois)
Built 1937, replaced in 2014-15
Pony truss bridge over Sugar Creek on Michael Road, east of Highland, 1.5 mi. east of Highland
Replaced by a new bridge

Ottawa Bridge (LaSalle County, Illinois)
(Main design: Parker through truss)
Built 1910; Replaced 1933
Lost Parker through truss bridge over Illinois River on La Salle Street
Replaced by a new bridge1933

Ottawa Bridge (Old) (LaSalle County, Illinois)
Built 1885; Replaced 1910
Pratt through truss bridge over Illinois River on La Salle Street
Replaced by a new bridge

Ottawa Creek TR 38 Bridge (Hancock County, Ohio)
Built by the Smith Bridge Co.
Pony truss bridge over Ottawa Creek on TR 38
Closed to all traffic

Ottawa Creek TR 84 Bridge (Hancock County, Ohio)
Built by the Wrought Iron Bridge Co.
Pony truss bridge over Ottawa Creek on TR 84
Closed to all traffic

Ottawa Street Bridge (Newton County, Missouri)
Built by the Canton Bridge Co, Replaced 2008
Pony truss bridge over Little Lost Creek on Ottawa Street in Seneca
Replaced by a new bridge

Otter Creek Bridge (Lyon County, Iowa)
Built 1900
Through truss bridge over Otter Creek on a local road
Open to traffic

Otter Creek Bridge (Franklin County, Virginia)
Built 1932
Pratt through truss bridge over Otter Creek on Mario Farm Road 892
Open to traffic

Otter Creek Bridge (Logan County, Oklahoma)
Built 1912
Through truss bridge over Otter Creek on E0640
Closed to all traffic

Otter Creek Bridge (Fayette County, Iowa)
Relocated 1956
Pony truss bridge over Otter Creek on 45th Street
Open to traffic

Otter Creek Bridge CR 1300N (Clay County, Indiana)
Built c 1898
Lost Pratt pony truss bridge over Otter Creek on CR 1300 N
Replaced by a new bridge

Otter Creek CR 139 Bridge (Monroe County, Missouri)
Built ca. 1920
Pony truss bridge over Otter Creek on CR 139
Open to traffic

Otter Creek Rail Road Bridge (Jennings County, Indiana)
Built 1890's
Pratt deck truss bridge over Otter Creek on Madison Railroad
Replaced by a new bridge

Otto Road Bridge (Fulton County, Illinois)
Pony truss bridge over Otter Creek on Otto Road (1250E)
Open to traffic

Ottumwa Wabash Bridge (Wapello County, Iowa)
Built 1888, North span of the bridge collapsed February 13, 1973; Converted into a pedestrian bridge 2007
Through truss pedestrian bridge over Des Moines River on former Wabash RR in Ottumwa
Open to pedestrians/bicycles

Ouachita River CR 74 Bridge (Polk County, Arkansas)
Built 1914; replaced 2001
Lost pony truss bridge over Ouachita River on CR 74
Replaced by a new bridge

Ouachita River CR 76 Bridge (Polk County, Arkansas)
Built 1914
Pony truss bridge over Ouachita River on CR 76 (Old US 71)
Open to one-lane traffic

Outlet Ditch CR 253 Bridge (Hancock County, Ohio)
Built by the Smith Bridge Co.
Pony truss bridge over Outlet Ditch on CR 253
Replaced by a new bridge

Outlet Ditch T-245 Pony Truss (Hancock County, Ohio)
Pratt pony truss bridge over Outlet Ditch on Abandoned Section of T-245
Abandoned

Outlet Ditch TR 251 Bridge (Hancock County, Ohio)
Pony truss bridge over Outlet Ditch on TR 251
Open to traffic

Overall Bridge (Page County, Virginia)
Built 1938; Bypassed by new bridge in 2008
Pratt deck arch truss bridge over Overall Run on former US 340
Derelict/abandoned

Overhead Bridge (Ripley County, Indiana)
Built 1906
Lost Pratt through truss bridge over Penn-Central Railroad on Main Street (SR 229)
Road level crossing built on a new alignment and old bridge removed.

Overseas Highway - Bahia Honda Bridge (Monroe County, Florida)
(Main design: Parker through truss)
Built 1912, converted to highway use in 1938; Abandoned 1972.
Railroad through truss bridge over Bahia Honda Channel on the former Florida East Coast Railway
Derelict/abandoned

Overton Bridge (Washington County, Indiana)
Built 1885 by the King Bridge Company; rehabilitated 1986; replaced 2002
Dismantled through truss bridge originally over Blue River on Martinsburg Road
Replaced by new bridge,through truss dismantled for reuse, bowstring pony privately owned.

OW - Fish's Eddy Bridge (Old) (Delaware County, New York)
One span collapsed in 1886, One span collapsed via a derailment in 1897, Replaced completely in 1901
Lost Pratt through truss bridge over East Branch Delaware River on New York, Ontario, & Western Railway
Destroyed by collision

Owens Mill Bridge (Cedar County, Missouri)
Built 1906 by the Canton Bridge Co.; replaced 2008
Lost through truss bridge over Bear Creek on CR 1801
No longer exists

Owens Road Bridge (Miami County, Ohio)
Built 1880's; rehabilitated 1958
Through truss bridge over Panther Creek on Owens Road (TR 76)
Open to traffic

Owl Branch Bridge CR 350 S (Putnam County, Indiana)
Built ca. 1990; Replaced 1988
Lost Pratt pony truss bridge over Owl Branch on CR 350 S
No longer exists

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

Oyster Creek CR 597 Bridge (Lewis County, Missouri)
Built ca. 1910
Pony truss bridge over Oyster Creek on CR 597
Open to traffic

Ozaukee Interurban Trail - Cedarburg Bridge (Ozaukee County, Wisconsin)
Built 1907 by Carneige Steel, Used as and interurban rail bridge until 1948, restored and reopened for bike traffic in 2002
Through truss bridge over Cedar Creek on Ozaukee Interurban Trail - Former Electric Interurban Line
Open to pedestrians

P&LE - Chartiers Creek Bridges (Allegheny County, Pennsylvania)
Bridge collapsed 1906
Lost Pratt through truss bridge over Chartiers Creek on Pittsburgh & Lake Erie Railroad
Collapsed

P. M. Bridge (Mason County, Michigan)
Lost Pratt through truss bridge over Little River on Main Street
Replaced by a new bridge

Pa Fork of Fish Creek Bridge (Marshall County, West Virginia)
Built 1924; Demolished 2011
Through truss bridge over Pa Fork of Fish Creek on US 250
Replaced by a new bridge

PA381 Youghioogheny River Bridge (Old) (Fayette County, Pennsylvania)
Replaced 1975
Lost Pratt through truss bridge over Youghioogheny River on PA 381
Replaced by a new bridge

Pacheco Creek Bridge (Santa Clara County, California)
Built 1915, Replaced 1986
Lost Pratt through truss bridge over Pacheco Creek on San Felipe Road
Replaced by new bridge

Paint Creek Bridge (Greene County, Tennessee)
Built 1935; rehabilitated 1983
Through truss bridge over Paint Creek on Paint Creek Road


Paint Creek Bridge (Carroll County, Indiana)
Built 1887
Pony truss bridge over Paint Creek on Meridian Road at 420N
Removed

Paint Creek Bridge (Greene County, Tennessee)
Built 1935; rehabilitated 1980
Lost pony truss bridge over Paint Creek on Paint Creek Road
Replaced by a new bridge

Paint Creek CR 83/3 (Middle Patch Rd.) Bridge (Kanawha County, West Virginia)
Built 1921
Through truss bridge over Paint Creek on CR 83/3 (Middle Patch Rd.)
Open to traffic

Paint Rock Creek Bridge (Roane County, Tennessee)
Built 1898, replaced 1985
Lost Bedstead Pratt pony truss bridge over Paint Rock Creek on Weaver Road
Replaced by new bridge

Paint Township Cemetery Bridge (Madison County, Ohio)
Pratt pony truss bridge over Walnut Creek on the Paint Township Cemetery driveway
Open to traffic

Painted Rock Road Bridge (Storey County, Nevada)
Built 1902
Pratt through truss bridge over Truckee River on Painted Rock Road
Open to traffic

PAL - Massac Creek Bridge (McCracken County, Kentucky)
Pratt through truss bridge over Massac Creek on the Paducah and Louisville Railroad
Open to traffic

PAL - Salt River Bridge (Jefferson County, Kentucky)
Three-span Pratt through truss bridge over Salt River on the P&L Railroad
Open to traffic

PAL - Valley Creek Bridge (Hardin County, Kentucky)
Pratt through truss bridge over Valley Creek on old Elizabethtown & Paducah Railroad
Open to traffic

Palisades Bridge (Minnehaha County, South Dakota)
Built 1908 by the Western Bridge & Construction Co.; rehabilitated 1940
Through truss bridge over Split Rock Creek in Palisades State Park
Open to one-lane traffic

Palisado Avenue Bridge (old) (Hartford County, Connecticut)
Built 1916, rehabilitated 1942, replaced 1987
Lost Pratt through truss bridge over Farmington River on Palisado Avenue
Replaced by a new bridge

Pancake-Clarkson Rd. Bridge (Columbiana County, Ohio)
Built ca. 1890 by the Penn Bridge Co.; rehabilitated 1960
Through truss bridge over North Fork Little Beaver on Pancake-Clarkson Rd. 1031
Open to traffic

Panther Creek Bridge (Hancock County, Illinois)
Built 1895
Pony truss bridge over Panther Creek on E CR800 Rd, 2.7 mi. southwest of St Mary
Derelict/abandoned

Panther Creek KY 81 Bridge (Daviess County, Kentucky)
Built 1934
Through truss bridge over Panther Creek on KY 81
Open to traffic

Pape Bridge (St. Clair County, Missouri)
Built 1911 by the Standard Bridge Co.
Through truss bridge over Little Clear Creek on CR SW 400
Closed to all traffic

Paper Mill Footbridge (Oxford County, Maine)
Built 1931
Pratt through truss bridge over Androscoggin River on Footbridge Lane
Open to pedestrians only