Ryegate Bridge (Golden Valley County, Montana)
Built 1911; rehabilitated 1994
Through truss bridge over Musselshell River on Buffalo Trail (CR 217)
Open to traffic

Sac River FM 128 Bridge (Greene County, Missouri)
Concrete arch bridge over Sac River on FM 128, southwest of Bois D'Arc
Open to one-lane traffic

Sac River FM 17 Bridge (Greene County, Missouri)
Concrete bridge over Sac River on Farm Road 17
Open to traffic

Saddle Barn Road Bridge (Lawrence County, Indiana)
Built 1905; rehabilitated 1988
Through truss bridge over Leatherwood Creek on Saddle Barn Road in Bedford
Open to traffic

Salamonie River Bridge (Wells County, Indiana)
Built 1905
Through truss bridge over Salamonie River on CR 900 South
Open to traffic

Salamonie Road Bridge (Huntington County, Indiana)
Built 1885 by the Smith Bridge Co.; replaced 1993
Lost through truss over Wabash River on CR 200 W (Salamonie Road)
Replaced by modern bridge

Sale Creek Bridge (Hamilton County, Tennessee)
Built 1954
Pony truss bridge over Sale Creek on Daugherty Ferry Road
Open to traffic

Saline River Bridge (Lincoln County, Kansas)
Built 1905
Pony truss bridge over Saline River, 0.5 mi. west and 0.2 mi. south of Sylvan Grove
Open to traffic

Salmon Creek Bridge (Clark County, Washington)
Built 1923
Concrete arch bridge over Salmon Creek on Old WA 503 in Meadow Glade
Open to traffic

Salmon River Bridge (Clackamas County, Oregon)
Built 1929
Deck truss bridge over Salmon River on E. Brightwood Loop
Open to traffic

Salt Creek Bowstring Bridge (Cloud County, Kansas)
Bowstring pony truss bridge over Salt Creek on 212th Street, southeast of Hollis
Open to one-lane traffic on a dead-end, low-maintenance road

Salt Creek Bridge (Lawrence County, Indiana)
Built ca.1890
Through truss bridge over Salt Creek on CR 10 South
Closed to all traffic

Salt Creek Old IN 450 Bridge (Lawrence County, Indiana)
Built 1901
Through truss bridge over Salt Creek on Old IN 450
Closed to all traffic

Salt Fork Bowstring Bridge (Saline County, Missouri)
Built ca. 1875
Bowstring through truss bridge over Salt Fork on CR 225
Open to traffic

Salt Fork CR 214 Bridge (Saline County, Missouri)
Built 1915; rehabilitated 1998
Pony truss bridge over Salt Fork on CR 214
Open to traffic

Sam Eckman Covered Bridge (Columbia County, Pennsylvania)
Built 1876
Covered bridge over Little Fishing Creek on Covered Bridge Road, north of Sereno
Open to traffic

San Antonio Bridge (Conejos County, Colorado)
Built 1988
Pony truss bridge over Rio San Antonio on CR C west of US 285
Open to two-lane traffic

San Luis Bridge (Costilla County, Colorado)
Built 1910-11 by the M.F. Levy Construction Co.
Open-spandrel arch bridge over Culebra Creek on CR 19 in San Luis
Open to pedestrians only

San Rafael Bridge (Emery County, Utah)
Built 1937 by the Civilian Conservation Corps; destroyed by arson fire
Suspension bridge over the San Rafael River at Buckhorn Wash
Destroyed by fire

Sand Creek Bridge (Jennings County, Indiana)
Built 1890
Through truss bridge over Sand Creek on CR 250 West
Open to traffic

Sandy Creek CR 404 Bridge (Cape Girardeau County, Missouri)
Built 1918; rehabilitated in 1981
Small plank bridge on CR 404 over Sandy Creek east of Friedheim
Open to one-lane traffic on a gravel road

Sandy Ford Bridge (White County, Arkansas)
Built 1929; rehabilitated 1991; replaced 2007
Lost pony truss bridge over Bull Creek on Sandy Ford Road (CR 127)
Replaced by a new bridge

Sank Bridge (Bollinger County, Missouri)
Built 1908; replaced 2004
Lost bedstead pony truss bridge over Clubb Creek on CR 530, northeast of Zalma
Replaced by a new bridge

Santa Fe Truss Bridge (Monroe County, Missouri)
Built 1888 as a two-span bridge near Florida by the St. Louis Bridge & Iron Co.; relocated here in 1932; replaced 1992
Lost wrought-iron through truss bridge over South Fork Salt River on CR 645 just south of Santa Fe
Replaced by a modern bridge

Satank Bridge (Garfield County, Colorado)
Built 1900 by the Pueblo Bridge Co.
Wooden through truss over Roaring Fork River on CR 106 near Carbondale
Closed to all traffic

Schell City Bridge (Vernon County, Missouri)
Built 1906
Through truss bridge over Osage River on Rockville Road/Old River Road north of Schell City
Closed to all traffic

Schiller Avenue Bridge (Jefferson County, Kentucky)
Built 1914
Concrete arch bridge over South Fork Beargrass Creek on Schiller Avenue in Louisville
Open to traffic

Schomberg Road Bridge (Warren County, Missouri)
Built 1908
Bedstead pony truss bridge over Water Run Creek on Schomberg Road
Open to one-lane traffic

Scioto River CR 4 Bridge (Pickaway County, Ohio)
Built 1914 by the Oregonia Bridge Co.; rehabilitated 1983
Through truss bridge over Scioto River on CR 4
Open to traffic

Scioto-Darby Road Bridge (Pickaway County, Ohio)
Built 1910 by the The Oregonia Bridge Co., Lebanon, Oh.; rehabilitated 1986
Through truss bridge over Big Darby Creek on Scioto-Darby Road (CR 22)
Open to traffic

Scipio Covered Bridge (Jennings County, Indiana)
Built 1886; rehabilitated 1984
Covered bridge over Sand Creek on CR 575W
Open to traffic

Scott County Road 224 Bridge (Scott County, Missouri)
Wooden stringer bridge over a branch of Caney Creek on CR 224 northeast of New Hamburg
Open to one-lane traffic

Searcy Bridge (White County, Arkansas)
Lost swing through truss bridge over Little Red River on US 67W (now Davis Road, CR 76)
No longer exists

Second Mill Creek Bridge (Reynolds County, Missouri)
Built 1921
Concrete slab bridge with ballusters on CR 360 (Old MO 21) east of Lesterville
Open to traffic with a 5 ton weight limit

Second Street Bridge (Allen County, Ohio)
Closed-spandrel arch bridge over Flat Fork on 2nd Street in Delphos
Open to traffic

Seigrist's Mill Covered Bridge (Lancaster County, Pennsylvania)
Built 1885
Covered bridge over Big Chickies Creek on Seigrist Road
Open to traffic

Seisemore Road Bridge (Deschutes County, Oregon)
Built 1914
Concrete arch bridge over Tumalo Irrigation Canal on Seisemore Road
Open to traffic

Seneca Park Road (Jefferson County, Kentucky)
Built ca. 1930
Concrete arch bridge over Middle Fork Beargrass Creek on Seneca Park Road in Louisville
Open to traffic

Seven Stone Arches Bridge (St. Francois County, Missouri)
Built 1932 by the Works Progress Administration
Seven stone arch spans over Terre Bleue Creek on Hillsboro Road
Open to traffic with a 15 ton weight limit

Sewell Bridge (Ripley County, Missouri)
Built 1924, but may have been moved to this location from elsewhere
Pony truss bridge over Little Black River on CR H-5, just north of Hemenway Bridge
Open to traffic

Shackelford Bridge (Cooper County, Missouri)
Built 1913
Through truss bridge over Lamine River on Shackelford Bridge Road
Open to traffic

Shaw Bridge (Saline County, Arkansas)
Built ca. 1920; replaced 1997
Lost through truss bridge over Saline River on Grand Avenue (CR 27) south of Benton
Replaced by a new bridge

Shaw Road Bridge (Jones County, Iowa)
Built 1924; rehabilitated 1954
Two-span through truss bridge over Wapsipinicon River on Shaw Road
Open to traffic

Shawnee Ford Bridge (Franklin County, Missouri)
Built ca. 1920; rehabilitated 1990
Through truss bridge over Bourbeuse River on Shawnee Ford Road beyond the end of Route AN
Open to one-lane traffic with a 19 ton weight limit

Shell Rock River Bridge (Cerro Gordo County, Iowa)
Built 1927; replaced 2003
Lost through truss bridge over Shell Rock River on a local road
No longer exists

Shell Rock River Crossing (Floyd County, Iowa)
Built 1938
Bridge over Shell Rock River on Local road
Open to traffic

Shenk's Mill Covered Bridge (Lancaster County, Pennsylvania)
Built 1855; rehabilitated 1977
Covered bridge over Big Chickies Creek on Erisnan Road
Open to traffic

Shinn Covered Bridge (Washington County, Ohio)
Built 1886 by E.B. Henderson; rehabilitated 1998
Covered bridge over West Branch Wolf Creek on Palmer Road (TR 447)
Unknown status

Shirley Bridge (Van Buren County, Arkansas)
Built ca. 1910 as a railroad bridge; rehabilitated 1988
Through truss bridge over Middle Fork Little Red River on River Road (CR 125) just outside of Shirley in Shirley
Open to one-lane traffic

Short Mountain Creek Bridge (Logan County, Arkansas)
Built 1928 by the Virginia Bridge & Iron Co.; rehabilitated 1976
Pony truss bridge over Short Mountain Creek on CR 64
Open to traffic

Short Road Bridge (Montgomery County, Missouri)
Built ca. 1910
Through truss bridge over Loutre River on Short Road
Open to traffic

Side Ditch Entrance Bridge (Dubuque County, Iowa)
Built 1900
Pony truss bridge over Side Ditch on an entrance road
Open to traffic

Sidney Road Bridge (Sharp County, Arkansas)
Built ca. 1945
Small two-span arch bridge over an unnamed creek on Sidney Road (CR 1)
Open to traffic

Silver Bridge (Franklin County, Arkansas)
Built ca. 1929 by the Lakeside Bridge & Steel Co.; rehabilitated 1976; closed to traffic Nov. 2006
Three-span through truss bridge over Mulberry River on CR 67 (Wire Road) just north of I-40 in Mulberry
Closed to traffic

Silver Creek Bridge (Chase County, Kansas)
Stone arch bridge over Silver Creek, 1.0 mi. north and 0.5 mi. east of Clements
Open to traffic

Silver Creek Bridge (Cedar County, Missouri)
Lost pony truss bridge over Silver Creek on CR 1651
No longer exists

Silver Creek Bridge (Minnehaha County, South Dakota)
Built 1938
Through truss bridge over Silver Creek on 255th Street, 3 mi. north and 1 mi. east of Renner
Unknown status

Silver Creek Bridge (Minnehaha County, South Dakota)
Built 1935; rehabilitated 1967
Steel stringer bridge over Silver Creek on 258 Th Street, 0.3 miles W of SD 115
Open to traffic

Silver Creek Bridge (Cowley County, Kansas)
Built ca. 1890
Two-span stone arch bridge over Silver Creek, 3 miles south and 1 mile east of Tisdale
Open to one-lane traffic

Silver Creek Sec. 27 Bridge (Cowley County, Kansas)
Built ca. 1890
Stone arch bridge over Silver Creek on a local road southeast of Winfield
Open to one-lane traffic

Sim Smith Covered Bridge (Parke County, Indiana)
Built 1883 by J.A. Britton; rehabilitated 1977
Covered bridge over Leatherwood Creek on CR N50W
Open to traffic

Simstown Road Bridge (Sharp County, Arkansas)
Built ca. 1935 by the Civilian Conservation Corps
Small three-span arch bridge over an unnamed creek on Simstown Road (CR 42)
Open to traffic

Singer Bridge (Miller County, Missouri)
Built ca. 1910
Through truss bridge over Tavern Creek on Singer Bridge Road (CR 52-60) just off MO 52 near St. Elizabeth
Open to one-lane traffic on a gravel road

Sinsabaugh Little Black River Bridge (Ripley County, Missouri)
Built ca. 1940
Plank span over Little Black River on CR H-10 west of Sinsabaugh
Open to traffic on a gravel road

Slagle Creek Bridge (Bollinger County, Missouri)
Built ca. 1925 by Miller & Borcherding Bridge Builders of St. Louis, the company that built Hargrove Bridge using the same patented truss design
Pony truss bridge over Slagle Creek on CR 714 near the intersection with CR 720 southwest of Arab
Open to traffic on a gravel road with a 4 ton weight limit

Smith Covered Bridge (Rush County, Indiana)
Built 1877 by A. M. Kennedy; rehabilitated 1996
Covered bridge over Flatrock River on CR 150 North
Open to traffic

Smithfield Bridge (Delaware County, Indiana)
Built 1902
Through truss bridge over White River on CR 170 South
Open to traffic

Smoky Hill River Bridge (McPherson County, Kansas)
Built 1919; rehabilitated 1989
Through truss bridge over Smoky Hill River on Syensk Road
Open to traffic

Smoky Hill River Bridge (Dickinson County, Kansas)
Built 1915
Through truss bridge over Smoky Hill River on Oat Road, 2.5 mi. east and 0.8 mi. south of Detroit
Closed to all traffic(?)

Smyrna Road Bridge (Christian County, Missouri)
Built 1912 by the Canton Bridge Co. of Canton, Ohio
Through truss bridge over Finley Creek on Smyrna Road northeast of Ozark
Open to one-lane traffic on a paved road

Snag Creek Bridge (Cedar County, Missouri)
Built ca. 1910
Pony truss bridge over Snag Creek on CR 1101
Open to traffic

Snow Hill Covered Bridge (Franklin County, Indiana)
Built 1894 by William Butts and John Horn; rehabilitated 1987
Covered bridge over Johnson Fork Whitewater River on Snow Hill Road
Open to traffic

Snyder Covered Bridge (Columbia County, Pennsylvania)
Built 1876
Covered bridge over Roaring Creek on Rarig Road, southeast of Catawissa
Open to traffic

Soledad Canyon Road over the Santa Clara River (Los Angeles County, California)
Built 1952
Steel stringer bridge over Santa Clara River on Soledad Cyn Road
Open to traffic

Sonestown Covered Bridge (Sullivan County, Pennsylvania)
Built 1900; rehabilitated 2001
Covered bridge over Muncy Creek on Champion Road (TR 310)
Open to traffic

South Big River Bridge (St. Francois County, Missouri)
Built 1924; made obsolete by new bridge in 1957
Through truss bridge over Big River on Old US 67 in Desloge
Open to two-lane traffic

South Boat Ditch Bridge (Clark County, Arkansas)
Built ca. 1928
Through truss bridge over South Boat Ditch on CR 8
Open to one-lane traffic

South Boston Road Bridge (Washington County, Indiana)
Built ca. 1930
Pony truss bridge over Middle Fork Blue River on Canton/S. Boston
Open to traffic

South Branch Manitowoc River Bridge (Fond du Lac County, Wisconsin)
Built 1910
Lost stone arch bridge over South Branch Manitowoc River on CTH HHH
Replaced

South Canon Bridge (Garfield County, Colorado)
Built 1914-15 by the Missouri Valley Bridge & Iron Co.
Closed through truss bridge over the Colorado River just off I-70, west of Glenwood Springs
Closed to all traffic

South Deer Creek Bridge (Douglas County, Oregon)
Built 1967
Truss bridge over South Deer Creek on CR 16
Open to traffic

South Fork Blue River Main Street Bridge (Washington County, Indiana)
Built 1884; rehabilitated 1987 and 2007
Through truss bridge over South Fork Blue River on Main Street in New Pekin
Open to traffic

South Fork Cane Creek Bridge (Carter County, Missouri)
Built 1922
Pony truss bridge over South Fork of Cane Creek south of Ellsinore on CR 256 (Old US 60)
Open to traffic with no posted weight limit

South Fork Oats Creek Bridge (Jackson County, Arkansas)
Built ca. 1930; replaced 2005
Lost concrete arch bridge over South Fork Oats Creek on Bradford Road (CR 1)
No longer exists

South Fork Pottawatomie Creek Bridge (Anderson County, Kansas)
Built 1934
Concrete pony arch bridge over South Fork Pottawatomie Creek, 0.5 mi. south and 3.7 mi. east of Garnett
Open to 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 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

Sparks Ferry Bridge (Jackson County, Indiana)
Built ca. 1890; closed to traffic 2006
Two-span through truss bridge over East Fork White River on Sparks Ferry Road
Open to pedestrians only

Spavinaw Creek Bedstead Bridge (Benton County, Arkansas)
Built 1909 by the Illinois Steel Bridge Co. of Jacksonville, Illinois. Replaced 1990
Lost bedstead pony truss bridge over Spavinaw Creek on CR 29 (Orchard Road) between Gravette and Decatur
Replaced by a new bridge

Spencer's Crossing Bridge (Anderson County, Kansas)
Built 1885 by the Wrought Iron Bridge Co.; replaced 2005
Through truss bridge over Pottawatomie Creek, 0.6 mi. west and 0.1 mi. north of Greeley
Preserved

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

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

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

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 Creek Road Bridge (Ellis County, Texas)
Built 1890
Through truss bridge over Grove Creek on Spring Creek Road in Waxahachie
Preserved awaiting full restoration

Spring Hill Road Bridge (Christian County, Missouri)
Built 1914 by the Canton Bridge Co.; demolished 2006
Lost through truss bridge over Finley Creek on Spring Hill Road northeast of Sparta
No longer exists

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