Self Creek US 70 Bridge (Pike County, Arkansas)
Built 1949 by the D.F. Jones Construction Co. of Little Rock
Three-span open-spandrel arch bridge over Self Creek (Greeson Lake) on US 70 in Daisy
Open to traffic

Seneca Bridge (La Salle County, Illinois)
Built 1932; rehabilitated 1986
Four-span through truss bridge over the Illinois River on IL 170 at Seneca
Open to two-lane traffic

Severn Creek KY 355 Bridge (Owen County, Kentucky)
Built 1942
Through truss bridge over Severn Creek on KY 355
Open to traffic

Shepperds Dell Bridge (Multnomah County, Oregon)
Built 1914
Concrete arch bridge over Shepperds Dell on HWY 100
Open to traffic

Sherman Minton Bridge (Jefferson County, Kentucky)
Built 1961; rehabilitated 1997
Two-span steel through arch bridge over Ohio River on I-64 between New Albany and Louisville in Louisville
Open to traffic

Shirley AR 9 Bridge (Van Buren County, Arkansas)
Lost through truss bridge over Middle Fork Little Red River on AR 9 at Shirley
Replaced by a new bridge in 1960

Shoemaker Covered Bridge (Columbia County, Pennsylvania)
Built 1881
Covered bridge over West Branch Run on Shoemaker Bridge Road (PA 4027)
Open to pedestrians only

Silver Creek IN 403 Bridge (Clark County, Indiana)
Built ca. 1940; rehabilitated 1976
Through truss bridge over Silver Creek on IN 403
Open to traffic

Singing Bridge (Franklin County, Kentucky)
Built 1893; rehabilitated 1956
Through truss bridge over Kentucky River on US 60 in Frankfort
Open to traffic

Sinking Creek Bridge (Shannon County, Missouri)
Built 1925
Three-span open-spandrel arches over Sinking Creek on MO 19 north of Round Spring
Open to traffic on a paved road, but scheduled for future rehabilitation

Sinking Creek KY 144 Bridge (Breckinridge County, Kentucky)
Built ca. 1950
Through truss bridge over Sinking Creek on KY 144
Open to traffic

Slide Canyon Bridge (Los Angeles County, California)
Built 1931
Concrete arch bridge over Slide Canyon on CA 2 in Angeles National Forrest
Open to traffic

Smackover Creek AR 7 Bridge (Union County, Arkansas)
Replaced 1990
Lost pony truss bridge over Smackover Creek on AR 7 (northbound)
Replaced by a new bridge

Smith Creek MO 94 Bridge (Warren County, Missouri)
Built 1934
Pony truss bridge over Smith Creek on MO 94
Open to two-lane traffic

Smithfield Street Bridge (Allegheny County, Pennsylvania)
Built 1883 under the direction of engineer Gustav Lindenthal
Two-span lenticular through truss bridge over Monongahela River on Smithfield Street in Pittsburgh
Open to four lanes of traffic

Smithland Bridge (Livingston County, Kentucky)
Built 1931; rehabilitated 1954
Through truss bridge over Cumberland River on US 60 at Smithland
Open to traffic

Smiths Creek Bridge (Franklin County, Arkansas)
Built 1928 by the Virginia Bridge & Iron Co.; replaced and relocated to a nearby field
Pony truss bridge formerly over Smiths Creek on AR 309
Closed to all traffic

Sni-A-Bar Creek Bridge (Lafayette County, Missouri)
Built 1929
Through truss bridge over Sni-A-Bar Creek on MO 224 (Old US 24) at Wellington
Open to traffic

Soden Grove Bridge (Lyon County, Kansas)
Built 1923; made obsolete by new bridge in 1987
Marsh arch bridge over Cottonwood River at Emporia
Open to pedestrians only

Sorrel Creek Bridge (Garland County, Arkansas)
Built 1930 by the West Arkansas Construction Co. of McAlister, Oklahoma
Small concrete arch bridge over Sorrel Creek on AR 7
Open to two-lane traffic

South Boat Ditch US 67 Bridge (Clark County, Arkansas)
Built 1931 by the Virginia Bridge & Iron Co. of Roanoke, Virginia
Pony truss bridge over South Boat Ditch on US 67
Open to two-lane traffic

South Fork Blue River IN 60 Bridge (Washington County, Indiana)
Built 1937
Concrete arch bridge over South Fork Blue River on IN 60 in New Pekin
Open to traffic

South Fork Bridge (Garland County, Arkansas)
Built 1928 by a county work crew for $3,500. Made obsolete by a new bridge in 1985 and closed to traffic.
Two-span concrete arch bridge over South Fork Saline River, next to AR 128
Open to pedestrians only

South Fork Root River Bridge (Fillmore County, Minnesota)
Built 1931
Pony truss bridge over South Fork Root River on MN 43
Open to traffic

South Fork US 421 Bridge (Clinton County, Indiana)
Built 1940; rehabilitated 1985
Pony truss bridge over South Fork Wildcat Creek on US 421
Open to traffic

South Fork US 65 Bridge (Van Buren County, Arkansas)
Built 1931 by M.K. Orr of Little Rock; rehabilitated 1962
Three-span cantilevered deck truss bridge over South Fork Little Red River on US 65 in Clinton
Open to traffic

South Harpeth River TN 100 Bridge (Davidson County, Tennessee)
Built 1929
Through truss bridge over South Harpeth River on TN 100 in Nashville
Open to traffic

South Lafave River AR 7 Bridge (Perry County, Arkansas)
Built 1933 by McEachin and McEachin, Inc., of Little Rock
Two-span pony truss bridge over South Fourche Lafave River on AR 7
Open to two-lane traffic

South Moreau Creek Route D Bridge (Cole County, Missouri)
Built 1956
Through truss bridge over South Moreau Creek on Route D
Open to one-lane traffic

South Umpqua River I-5 Bridge (Douglas County, Oregon)
Built 1965; rehabilitated 1983
Deck truss bridge over South Umpqua River on Southbound I-5
Open to traffic

Spencer Grand Avenue Bridge (Clay County, Iowa)
Built 1915; rehabilitated 1951
Lost concrete arch bridge over Little Sioux River on US 18/71 (Grand Avenue) in Spencer
Replaced by a new bridge

Spoede Road Bridge (St. Louis County, Missouri)
Built 1937
Steel stringer bridge over I-64/US 40 on Spoede Road in Frontenac
Replacement bridge to be built Summer 2008

Spring City Bridge (Rhea County, Tennessee)
Built 1931
Lost through truss bridge over Piney River on US 27/TN 29 in Spring City
No longer exists

Spring Creek Bridge (Rockingham County, Virginia)
Built 1925 by the Champion Bridge Co.
Pony truss bridge over Spring Creek on Route 748 at Spring Creek
Open to one-lane traffic

Spring River Old US 60 Bridge (Lawrence County, Missouri)
Built 1927
Concrete tee beam bridge over Spring River on Business US 60 near Verona
Open to two-lane traffic

Spring River Route D Bridge (Jasper County, Missouri)
Pony truss bridge over Spring River on Route D southwest of Purcell
Open to two-lane traffic

Spring River Route O Bridge (Jasper County, Missouri)
Built 1935
Through truss bridge over Spring River on Route O
Open to two-lane traffic

Spring Valley Bridge (Bureau County, Illinois)
Built 1934; rehabilitated 1989
Five-span through truss bridge over the Illinois River on IL 89 south of Spring Valley
Open to two-lane traffic

Square Rock Creek AR 28 Bridge (Scott County, Arkansas)
Built 1961; replaced 2003
Lost pony truss bridge over Square Rock Creek on AR 28
Replaced by new bridge

Squaw Creek MO 118 Bridge (Holt County, Missouri)
Built 1928; replaced 2003
Lost pony truss bridge over Squaw Creek on MO 118 southwest of Mound City
No longer exists

St Francis River Bridge (St. Francois County, Missouri)
Built 1967
Steel stringer bridge over St Francis River on Route H
Open to traffic

St. Francis River Bridge (Mille Lacs County, Minnesota)
Built ca. 1900
Lost pratt through truss bridge over St. Francis River on Local road at wildlife refuge just off CSAH 5
Removed

St. Francis River Bridge Route C (Madison County, Missouri)
Bridge over St Francis River on Route C
Open to traffic

St. Francis River Bridge Route W (St. Francois County, Missouri)
Built 1948
Concrete tee beam bridge over St Francis River on Route W
Open to traffic

St. Francis River MO N (St. Francois County, Missouri)
Bridge over St. Francis River on Mo N
Open to traffic

St. Francis River Route E Bridge (Madison County, Missouri)
Built 1936
Two-span through truss bridge over St. Francis River on Route E
Open to two-lane traffic

St. Johns Bridge (Multnomah County, Oregon)
Built 1931
Suspension bridge over Willamette River on US 30 Bypass in Portland
Open to traffic

St. Johns Creek Route YY Bridge (Franklin County, Missouri)
Built 1957
Three-span pony truss bridge over St. Johns Creek on Route YY
Open to two-lane traffic

St. Marys Bridge (Pleasants County, West Virginia)
Cantilevered through truss bridge over Ohio River on WV 16 at St. Marys
Open to traffic

State Hospital Entrance Bridge (Jefferson County, Indiana)
Built 1930
Concrete arch bridge over the Madison Railroad at Madison State Hospital, just off IN 7
Open to one-lane light traffic

Steel Bridge (Multnomah County, Oregon)
Built 1910
Through truss bridge over Willamette River on OR 99W in Portland
Open to traffic

Stephens Bridge (Ouachita County, Arkansas)
Built 1928; rehabilitated 1990
Pony truss bridge over the railroad tracks on AR 57 in Stephens
Closed to all traffic

Stone Arch Bridge (Hennepin County, Minnesota)
Built 1883 for the St. Paul, Minneapolis, and Manitoba Railway; rehabilitated 1994
Stone arch bridge over the Mississippi River at St. Anthony Falls in Minneapolis
Open to pedestrians only

Stone Arch Road Bridge (Johnson County, Indiana)
Built 1885
Through truss bridge over Ninevah Creek on Stone Arch Road
Open to traffic

Stones Branch Bridge (Bollinger County, Missouri)
Built 1922
Pony truss bridge over Stones Branch on MO 51, near the Route A intersection
Open to two-lane traffic on a paved road

Stones River TN 24 Bridge (Davidson County, Tennessee)
Built 1928
Through truss bridge over Stones River on TN 24 in Nashville
Open to traffic

Stono River SC 700 Bridge (Charleston County, South Carolina)
Built 1929 by the Greenville Steel & Iron Co.; rehabilitated and widened in 1951; replaced 2004
Lost pony truss swing bridge over Stono River on SC 700, west of Charleston
Open to traffic

Stony Creek Bridge (Dinwiddie County, Virginia)
Built 1926
Rainbow arch bridge over Stony Creek on Southbound US 1
Open to two lanes of southbound traffic

Stouts Creek Arch Bridge (Iron County, Missouri)
Built 1928
Open-spandrel arch bridge over Stouts Creek on MO 72 above Lake Killarney
Open to traffic

Strawberry River US 167 Bridge (Sharp County, Arkansas)
Built 1928 by Fred Luttjohann; widened in 1955
Three-span open-spandrel arch bridge over Strawberry River on US 167
Open to two-lane traffic

Stucker Creek IN 3 Bridge (Scott County, Indiana)
Built 1939; rehabilitated 1979
Pony truss bridge over Stucker Creek on IN 3
Open to traffic

Sugar Creek Bridge (Crawford County, Illinois)
Built 1937
Steel stringer bridge over Sugar Creek on Sbi-163
Open to traffic

Sulfur Fork Bridge (Montgomery County, Tennessee)
Built 1890 by the Converse Bridge Company
Pratt through truss bridge over Sulfur Fork on an old alignment of the Old Clarksville-Springfield Rd. in Port Royal State Park
Open to pedestrians

Sulpher Lake Bridge (Redwood County, Minnesota)
Built 1927
Through truss bridge over Sulpher Lake on MN 19
Open to traffic

Swan Creek US 160 Bridge (Taney County, Missouri)
Built 1951
Two-span through truss bridge over Swan Creek (part of Bull Shoals Lake) on US 160 near Forsyth
Open to two-lane traffic

Table Rock Lake MO 39 Bridge (Barry County, Missouri)
Built 1958
Cantilevered through truss bridge over Table Rock Lake (White River) on MO 39 near Shell Knob
Open to two-lane traffic

Tallahatchie River Bridge (Panola County, Mississippi)
Built 1940
Through truss bridge over Tallahatchie River on MS 6 west of Batesville
Open to two-lane traffic

Tallahatta Creek Bridge (Lauderdale County, Mississippi)
Built 1953
Steel stringer bridge over Tallahatta Creek on US 80
Open to traffic

Taos Gorge Bridge (Taos County, New Mexico)
Built 1965
Deck truss bridge over Rio Grande on US 64, northwest of Taos
Open to traffic

Tennessee River Bridge (Morgan County, Alabama)
Built 1931
Through truss bridge over Tennessee River on US 231/AL 53 in Huntsville
Open to traffic

Tennessee River I-24 Bridge (Marshall County, Kentucky)
Built 1974
Pair of steel through arch bridges over the Tennessee River on I-24
Open to traffic

Tenth Street Bridge (Cascade County, Montana)
Built 1920 by Porter Brothers Co. of Spokane, WA
Eight-span open-spandrel arch bridge over the Missouri River on 10th Street in Great Falls
Open to pedestrians only

Terre Noire Branch AR 26 Bridge (Clark County, Arkansas)
Lost pony truss bridge over a branch of Terre Noire Creek on AR 26
No longer exists

Terre Noire Creek AR 26 Bridge (Clark County, Arkansas)
Replaced 1954
Lost through truss bridge over Terre Noire Creek on AR 26
Replaced by a new bridge

Terre Noire Creek US 67 Bridge (Clark County, Arkansas)
Built 1931 by the Virginia Bridge & Iron Co. of Roanoke, Virginia
Pony truss bridge over Terre Noire Creek on US 67
Open to traffic

Terre Rouge Creek US 67 Bridge (Hempstead County, Arkansas)
Built 1931 by the Virginia Bridge & Iron Co.
Pony truss bridge over Terre Rouge Creek on US 67
Open to two-lane traffic

Texas Street Bridge (Bossier Parish, Louisiana)
Built 1934; rehabilitated 1984
Cantilevered through truss bridge over Red River on US 80 in Shreveport
Open to four-lane traffic

Thayer Viaduct (Oregon County, Missouri)
Built by M.S. Cartter & Co. of St. Louis
Through truss bridge over the BNSF railroad and Two Mile Creek on MO 19/Business US 63 in Thayer
Open to two-lane traffic

Theodosia Bridge (Ozark County, Missouri)
Built 1941; rehabilitated 1951
Ten-span through truss bridge over Little North Fork White River (arm of Bull Shoals Lake) on US 160 near Theodosia
Open to two-lane traffic

Third Street Bridge (Marion County, Missouri)
Lost bowstring truss bridge over Bear Creek on Third Street (now MO 79) in Hannibal
No longer exists

Thomas Creek Bridge (Curry County, Oregon)
Built 1961
Deck truss bridge over Thomas Creek on US 101
Open to traffic

Three Creek Bridge (Union County, Arkansas)
Built 1930-31 by the Virginia Bridge & Iron Co.; replaced 1999
Pony truss bridge over Three Creek on AR 15
No longer exists

Tippah River Bridge (Marshall County, Mississippi)
Built 1937
Wooden bridge over Tippah River on MS 178 (Old US 78) northwest of Potts Camp
Open to traffic

Tippecanoe River IN 119 Bridge (Pulaski County, Indiana)
Built 1948; rehabilitated 1996
Through truss bridge over Tippecanoe River on IN 119
Open to traffic

Topanga Canyon Road (CA 29) over Topanga Creek (Los Angeles County, California)
Built 1934
Concrete arch bridge over Topanga Creek on CA 27 in Los Angeles
Open to traffic

Topanga Canyon Road over Garapito Creek (Los Angeles County, California)
Built 1927
Concrete arch bridge over Garapito Creek on CA 27 in Los Angeles
Open to traffic

Trenton Viaduct (Grundy County, Missouri)
Built 1931; replaced 2003
Lost through truss bridge over the Union Pacific Railroad on MO 6 in Trenton
Replaced by a new bridge

Trimble Creek IN 25 Bridge (Kosciusko County, Indiana)
Built 1946
Concrete arch bridge over Trimble Creek on IN 25
Open to traffic

Tumbling Shoals Bridge (Cleburne County, Arkansas)
Built 1912 by contractor Harry Churchill. Probably lost when Greers Ferry Lake was constructed 1962-65.
Lost swinging bridge over Little Red River between Heber Springs and Tumbling Shoals
Removed

Tunnel No. 1 (Jefferson County, Colorado)
Built 1951
Tunnel on US 6 west of Golden
Open to two-lane traffic

Tunnel No. 2 (Jefferson County, Colorado)
Built 1941
Tunnel on US 6 west of Golden
Open to two-lane traffic

Tunnel No. 3 (Jefferson County, Colorado)
Built 1957
Tunnel on US 6 west of Golden
Open to two-lane traffic

Tunnel No. 4 (Gilpin County, Colorado)
Built 1939
Abandoned tunnel on CO 119 near the junction with US 6
Still intact, but boarded up after the roads were realigned to make this tunnel unnecessary

Tuque Creek Bridge (Warren County, Missouri)
Built 1933
Pony truss bridge over Tuque Creek on MO 47/94 just southeast of Marthasville
Open to two-lane traffic

Turkey Creek Old US 63 Bridge (Callaway County, Missouri)
Built 1924; rehabilitated 1940
Concrete bridge with balustrade over Turkey Creek on Cedar City Drive (Old US 63) in Jefferson City
Open to two-lane traffic

Turnback Creek Route DD Bridge (Lawrence County, Missouri)
Built 1955
Pony truss bridge over Turnback Creek on Route DD
Open to one-lane traffic

Tuscumbia Bridge (Miller County, Missouri)
Built 1932
Through and deck truss bridge over the Osage River on MO 17 at Tuscumbia
Open to two-lane traffic, but in poor condition

Tuscumbia Swinging Bridge (Miller County, Missouri)
Built 1905 by Joseph Dice; replaced 1932 by the current bridge
Lost swinging bridge over Osage River at Tuscumbia on what is now MO 17
No longer standing, but artifacts still visible on both banks

Twin Bridges North Fork Bridge (Douglas County, Missouri)
Built 1931
Three-span open-spandrel arch bridge over North Fork White River on MO 14 at Twin Bridges
Open to two-lane traffic

Twin Bridges Spring Creek Bridge (Douglas County, Missouri)
Built 1931
Two-span open-spandrel arch bridge over Spring Creek on MO 14 at Twin Bridges
Open to two-lane traffic