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 Holston River Bridge (Sullivan County, Tennessee)
Built 1950
Subdivided Warren through truss bridge over South Holston River on U.S. 421 (State Highway 34)
Open to traffic

South Island Bridge (Will County, Illinois)
Pony truss bridge over East Branch Kankakee River on West Street, 0.25 mi. north of Kahler Rd
Open to one-lane 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 River CR 402 Bridge (Marion County, Missouri)
Built ca. 1930, replacing an earlier bridge
Pony truss bridge over South River on CR 402, east of Palmyra
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

South Wea Creek Bridge (Miami County, Kansas)
Built 1915
Concrete arch bridge over South Wea Creek, 3.0 mi. south and 0.6 mi. west of Louisburg
Open to traffic

Sparkman Street Bridge (Morgan County, Alabama)
Built 1915
Concrete arch bridge over Shoal Creek on Sparkman Street in Hartselle
Open to traffic

Speakman Covered Bridge (Chester County, Pennsylvania)
Built 1881
Covered bridge over Buck Run T Branch on Frog Hollow Road
Open to traffic

Spencer Creek Covered Bridge (St. Charles County, Missouri)
Built 1976 by Roger Adams
Replica covered bridge over Spencer Creek at Spencer Creek Subdivision in St. Peters
Open to traffic

Spencerville Covered Bridge (De Kalb County, Indiana)
Built 1873 by John McKay
Covered bridge over Saint Joseph River on CR 68
Open to traffic

Spider Leg Bridge (Crawford County, Kansas)
Built in 1914 to replace a wooden bridge.
Closed-spandrel arch bridge over Branch of West Fork Dry Wood Creek on Saint Louis-San Francisco Railroad
Open to traffic

Spillman Creek Bridge (Lincoln County, Kansas)
Built ca. 1930
Stone arch bridge over Spillman Creek, 3.5 mi. south and 0.3 mi. east of Ash Grove
Open to traffic

Spillman Creek Bridge (Lincoln County, Kansas)
Built 1912
Through truss bridge over Spillman Creek, 3.7 mi. west of Lincoln
Open to traffic

Spillman Creek Bridge (Lincoln County, Kansas)
Built ca. 1910
Pony truss bridge over Spillman Creek, 1.3 mi. north and 2.0 mi. east of Vesper
Open to traffic

Splice Creek Road Bridge (Moniteau County, Missouri)
Built or relocated here ca. 1930
Pony truss bridge over Splice Creek on East Splice Creek Road near Lupus
Open to one-lane traffic

Split Rock Bridge (Pipestone County, Minnesota)
Built 1938 by the Works Progress Administration
Stone arch bridge at Split Rock Creek State Park on CR 54
Open to traffic

Spoil Bank Railroad Bridge (Stoddard County, Missouri)
Built 1935; west approach reconstructed 1975
Two-span pony plate girder bridge over the Spoil Bank drainage ditch on the Union Pacific Railroad, west of Morehouse
Open to traffic

Sprague River Bridge I (Klamath County, Oregon)
Built 1944
Bridge over Sprague River on Sprague River Highway in Sprague River
Open to traffic

Sprague River Bridge II (Klamath County, Oregon)
Built 1944
Concrete deck girder bridge over Sprague River on Sprague River Highway
Open to traffic

Spring Branch Bridge (Benton County, Arkansas)
Built 1932
Small concrete bridge over Spring Branch on AR 72 in Lundell
Open to traffic

Spring Creek 1900N Bridge (Iroquois County, Illinois)
Built 1916
Through truss bridge over Spring Creek on 1900N Road
Open to traffic

Spring Creek Branch 1250N Bridge (Iroquois County, Illinois)
Built 1904
Two-span bedstead pony truss bridge over a branch of Spring Creek on 1250N Road
Open to one-lane traffic

Spring Creek Bridge (Lincoln County, Kansas)
Built ca. 1930
Pony truss bridge over Spring Creek, 4.0 mi. south and 3.4 mi. east of Vesper
Open to traffic

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 Creek Bridge (Atchison County, Kansas)
Built ca. 1930
Pony truss bridge over Spring Creek, 1.0 mi. west and 1.6 mi. north of Arrington
Open to traffic

Spring Creek CR 519 Bridge (Maries County, Missouri)
Built ca. 1930
Concrete tee beam bridge over Spring Creek on CR 519
Open to traffic

Spring Lake Bridge (Yell County, Arkansas)
Built 1936 by the United States Resettlement Administration (WPA)
Small two-span stone arch bridge over Bob Barnes Branch at Spring Lake Recreation Area
Open to traffic

Spring River CR 1040 Bridge (Lawrence County, Missouri)
Built ca. 1930
Through truss bridge over Spring River on CR 1040
Open to traffic

Spring River CR 2130 Bridge (Lawrence County, Missouri)
Pony truss bridge over Spring River on CR 2130
Open to one-lane traffic

Spring River CR 74 Bridge (Fulton County, Arkansas)
Built 1916 by H.B. Walton
Five-span concrete deck girder bridge over Spring River on CR 74 (Old US 63) in Mammoth Spring
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 Road Bridge (Grundy County, Illinois)
Built 1910
Three-span concrete girder bridge over Mazon River on Spring Road (TR 105), .3 mi. east of Campbell Rd
Open to one-lane traffic

Spring Street Bridge (Chippewa County, Wisconsin)
Built 1916; Placed on NRHP 1982
Rainbow arch bridge over Duncan Creek on Spring Street in Chippewa Falls
Open to traffic

Spring Street Bridge (Floyd County, Indiana)
Built ca. 1920
Four-span concrete arch bridge over Silver Creek on Spring Street in Clarksville
Open to traffic

Spring Street Bridge (Crawford County, Missouri)
Built 1937 by the Works Progress Administration
Stringer bridge over Yadkin Creek on Spring Street in Steelville
Open to one-lane traffic with a 15 ton weight limit

Spring Street Bridge (Garland County, Arkansas)
Concrete arch bridge over Gulpha Creek on Spring Street in Hot Springs
Open to two-lane traffic

Spring Street Bridge (Whitman County, Washington)
Built 1915
Concrete arch bridge over South Fork Palouse River on Spring Street in Pullman
Open to 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

Spring Valley Road Bridge (Miami County, Kansas)
Built ca. 1920
Pony truss bridge over North Wea Creek, 2.2 mi. north and 2.0 mi. west of Louisburg
Open to traffic

Springfield Bridge (Lane County, Oregon)
Built 1929
Through truss bridge over Willamette River on Westbound OR 126 in Springfield
Open to traffic

SPRR Bridge over Victory Place (Los Angeles County, California)
Built 1932
Bridge over Victory Place on Southern Pacific, Amtrak, and Metrolink in Burbank
Open to Traffic

SPRR over Valley Blvd. next to Soto Street (Los Angeles County, California)
Built 1906
Steel stringer bridge over Bnsf Ry Spur, Valley Bld on Sptco Bridge in Los Angeles
Closed

Squaw Creek Bridge (Brown County, Kansas)
Built ca. 1950
Pony truss bridge over Squaw Creek, 3.5 mi. east and 4.3 mi. north of Everest
Open to traffic

SS Badger, Lake Michigan Carferry Service (Manitowoc County, Wisconsin)
Built in 1952 by Christy Corporation of Sturgeon Bay, Wisconsin, Put into service 1953
Ferry across Lake Michigan on US 10
Operates daily May through October, 2 crossings Spring & Fall, 4 crossings in Summer

St Francis River Bridge (St. Francois County, Missouri)
Built 1967
Steel stringer bridge over St Francis River on Route H
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 Street Bridge (Preble County, Ohio)
Built 1887 by the Columbia Bridge Works; rehabilitated 1999
Through truss bridge over a branch of Seven Mile Creek on St. Clair Street in Eaton
Open to traffic

St. Elmo Bridge (Chaffee County, Colorado)
Built 1953
Wooden deck bridge over Chalk Creek on CR 267 at St. Elmo
Open to one-lane 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. Francisville Bridge (Lawrence County, Illinois)
Through truss swing bridge over the Wabash River near St. Francisville
Open to one-lane traffic, with a tollbooth in St. Francisville

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. Joseph Railroad Bridge (Buchanan County, Missouri)
Built 1906, replacing an earlier swing bridge
Pennsylvania through truss swing bridge over Missouri River on the Union Pacific Railroad at St. Joseph
Open to traffic

St. Laurent Creek Bridge (Ste. Genevieve County, Missouri)
Built ca. 1920
Pony truss bridge over St. Laurent Creek on Second Street (unmarked) in St. Mary just south of US 61 and just north of the Perry County line
Open to one-lane traffic with a weight limit

St. Laurent Creek CR 930 Bridge (Perry County, Missouri)
Built ca. 1930; replaced 2005
Bedstead pony truss bridge over St. Laurent Creek on CR 930 southeast of St. Mary
Replaced by new bridge

St. Louis Avenue Bridge (Jackson County, Missouri)
Built 1914; replaced 2003
Lost skewed Pratt through truss over the KCS Railroad on St. Louis Avenue
Replaced by new bridge

St. Mary River Aqueduct Bridge (Glacier County, Montana)
Built 1915 by the Minneapolis Bridge Co.
Two-span through truss bridge over St. Mary River on CR 224, also carrying a pair of water pipelines
Open to traffic

St. Mary River Bridge (Glacier County, Montana)
Built 1934
Three-span concrete arch bridge over St. Mary River on Going-To-The-Sun Road
Open to traffic

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

St. Paul Avenue Lift Bridge (Milwaukee County, Wisconsin)
Built 1966
Bridge over Milwaukee River on St. Paul Avenue in Milwaukee
Open to traffic

Stagecoach Road Bridge (Jersey County, Illinois)
Through truss bridge over Piasa Creek on Stagecoach Road (TR 154)
Open to one-lane traffic

Stark Steet Bridge (Multnomah County, Oregon)
Built 1915
Concrete arch bridge over an unnamed draw on Stark Steet
Open to traffic

Stark Street Bridge (Multnomah County, Oregon)
Built 1914
Truss bridge over Sandy River on Stark Street
Open to traffic

Starrucca Viaduct (Susquehanna County, Pennsylvania)
Built 1848
Stone arch bridge over Starrucca Creek on New York, Susquehanna and Western Railway in Lanesboro
Open to traffic

State Bridge 1788 (Carroll County, Indiana)
Built 1935; rehabilitated 1990
Bridge over Us 421 on North Street in Delphi
Open to traffic

State Center Lincoln Highway C&NW Bridge (Story County, Iowa)
Deck plate girder bridge over 4th Street SW (The Lincoln Highway) on Union Pacific Double Mainline (Formerly Chicago & North Western Railway)
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

State Road Covered Bridge (Ashtabula County, Ohio)
Built 1983 by John Smolen
Modern covered bridge over Conneaut Creek on State Road (CH 354)
Open to traffic

State Street Bascule Bridge (Racine County, Wisconsin)
Built 1988
Single span bascule bridge over Root River on State Street (WI 38) in Racine
Open to traffic

State Street Bridge (Jackson County, Minnesota)
Built 1985. Previous spans consisted of a 5-panel through truss bridge built ca. 1900. Span was replaced with riveted Parker through truss span relocated from US 71 Bridge. Bridge was constructed by Iowa Bridge Co. in 1924. Bridge replaced 1985
Steel stringer bridge over Des Moines River on State Street in Jackson
Open to traffic

State Street Bridge (Milwaukee County, Wisconsin)
Built 1924; Restored 2007
Bascule bridge over Milwaukee River on State Street (Westbound US 18) in Milwaukee
Open to traffic

State Street Bridge (Fountain County, Indiana)
Built 1963
Pony truss bridge over Coal Creek on State Street in Veedersburg
Open to traffic

State Street Bridge (Cook County, Illinois)
Built 1949
Bascule bridge over Main Branch Chicago River on State Street in Chicago
Open to traffic

Station Road Bridge (Huntington County, Indiana)
Built 1915; rehabilitated 1988
Camelback through truss bridge over Little Wabash River on Station Road in Roanoke
Open to traffic

Steamboat Bill Bridge (Limestone County, Alabama)
Built 1963 and replaced the older Keller Memorial Bridge, which was a drawbridge. Eastbound bridge built 1999.
Cantilevered through truss bridge over Tennesee River on US 31/ALT US 72/AL 20
Open to traffic

Steel Bridge (Multnomah County, Oregon)
Built 1912
Through truss bridge over Willamette River on OR 99W in Portland
Open to traffic

Steel Craft Drive Bridge (Washington County, Wisconsin)
Built 1988
Bridge over Rubicon River on Steel Craft Drive in Hartford
Open to traffic

Steinman Bridge (Jackson County, Oregon)
Built 1914
Concrete deck girder bridge over OR- 273 (Old Siskiyou Highway) & Central Oregon and Pacific Railroad on OR-273 Old Siskiyou Highway (Old Hwy 99)
Open to traffic

Stewart Creek Bridge (Cowley County, Kansas)
Built 1904
Stone arch bridge over Stewart Creek on a local road east of Udall
Open to one-lane traffic

Stewart Park Road Bridge (Douglas County, Oregon)
Built 1946
Truss bridge over South Umpqua River on Stewart Park Road in Roseburg
Open to traffic

Steyer Bridge (Winneshiek County, Iowa)
Limestone deck arch was locally built by Michael Steyer.
Bridge over Twin Springs Creek on Oneata Drive
Open to traffic

Stillions Bridge (Ashley County, Arkansas)
Built 1906 by the Pennsylvania Steel Co.
Through truss swing bridge over Saline River on the Fordyce and Princeton Railroad (formerly Rock Island) northwest of Crossett
Open to railroad traffic

Stockheughter Covered Bridge (Franklin County, Indiana)
Built 1887 by the Smith Bridge Co.; rehabilitated 1988
Covered bridge over Salt Creek on Enochsburg Road
Open to traffic

Stoddard County Road 307 Bridge No. 1 (Stoddard County, Missouri)
Built 1922; probably bypassed by new MO 25 alignment in 1946
Concrete tee beam bridge over a branch of Wolf Creek on CR 307 (Old MO 25)
Open to traffic

Stoddard County Road 307 Bridge No. 2 (Stoddard County, Missouri)
Built 1922
Concrete tee beam bridge over Wolf Creek on CR 307 (Old MO 25)
Open to traffic

Stoddard County Road 307 Bridge No. 3 (Stoddard County, Missouri)
Built 1922
Concrete tee beam bridge over a branch of Wolf Creek on CR 307 (Old MO 25)
Open to traffic

Stoddard County Road 307 Bridge No. 4 (Stoddard County, Missouri)
Built 1922
Concrete tee bridge over an unnamed creek on CR 307 (Old MO 25) just north of MO 91
Open to traffic

Stone Arch Road Bridge (Johnson County, Indiana)
Built 1885
Through truss bridge over Ninevah Creek on Stone Arch Road. Located in Atterbury Fish and Wildlife Area.
Open to traffic

Stone Creek Bridge (Fayette County, Illinois)
Built 1925; rehabilitated 1940
Pony truss bridge over Stone Creek on TR 438
Open to traffic

Stonelick Covered Bridge (Clermont County, Ohio)
Built 1878; rehabilitated 1971
Covered bridge over Stonelick Creek on Stonelick Williams Corner Road (CR 116)
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 (Glenn County, California)
Built 1913; rehabilitated 1952
Concrete arch bridge over Stony Creek on CA 99W
Open to traffic