Saline River US 79 Bridge (Cleveland County, Arkansas)
Replaced 1956
Lost through truss bridge over Saline River on AR 3 (later US 79) south of Rison
Replaced by a new bridge

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

Sampson Creek CR 349 Bridge (Daviess County, Missouri)
Built 1946
Pony truss bridge over Sampson Creek on CR 349
Open to traffic

Sampson Creek Old US 136 Bridge (Harrison County, Missouri)
Built 1922; made obsolete in 1939 by new bridge on US 136
Pony truss bridge over Sampson Creek on Lincoln Street (Old US 136) in New Hampton
Open to traffic

Sand Creek IN 3 Bridge (Jennings County, Indiana)
Built 1935; rehabilitated 1982
Through truss bridge over Sand Creek on IN 3
Open to traffic

Sandy Creek MO 79 Bridge (Lincoln County, Missouri)
Built 1938
Through truss bridge over Sandy Creek on MO 79 near Foley
Open to traffic

Santa Fe Avenue Bridge (Pueblo County, Colorado)
Built 1924 by the Pueblo Bridge Co.
Through truss bridge over the Arkansas River on eastbound US 50 (Santa Fe Avenue) in Pueblo
Open to two lanes of traffic

Saxton Ford Bridge (Buchanan County, Missouri)
Built 1925 by the Witham Construction Co.; replaced 1989
Lost through truss bridge over Platte River on Saxton-Easton Road
Replaced by a modern bridge

Schilpp Road Bridge (Lee County, Illinois)
Built 1915; relocated August 2006
Relocated pony truss bridge formerly over Five Mile Branch on Schilpp Road
Awaiting reconstruction at a site near Franklin Grove

Second Creek Road Bridge (Clay County, Missouri)
Built or relocated here ca. 1970
Pony truss bridge over Second Creek on Second Creek Road at Smithville
Open to two-lane traffic

Sevenmile Bridge (Mineral County, Colorado)
Built 1935; relocated 1981
Deck truss bridge over the Rio Grande at the entrance to Marshall Park Campground, just off CO 149
Open to traffic

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

Sixth Street Bridge (Greene County, Arkansas)
Built 1934; rehabilitated 1995; removed sometime after 1997
Lost pony truss bridge over Eight Mile Creek on North Sixth Street in Paragould
No longer exists

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

Slate Creek Bridge (Summit County, Colorado)
Built 1924
Pony truss bridge over Blue River on Slate Creek Road (CR 1450)
Open to 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

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 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 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 Holston River CSX Railroad Bridge (Sullivan County, Tennessee)
Built in 1907 as part of first segment of the South & Western RR, later the Carolina, Clinchfield & Ohio, later the Clinchfield, now the CSX Railroad
Howe Truss railroad bridge over the South Fork Holston River on the CSX (formerly Clinchfield) Railroad
Open to rail 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 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

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

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

Spring Creek 1900N Bridge (Iroquois County, Illinois)
Built 1916
Through truss bridge over Spring Creek on 1900N Road
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 Route O Bridge (Jasper County, Missouri)
Built 1935
Through truss bridge over Spring River on Route O
Open to two-lane traffic

St. Charles River US 50 Bridge (Pueblo County, Colorado)
Built 1942; parallel eastbound bridge built 1971
Through truss bridge over St. Charles River on westbound US 50 in Pueblo
Open to two-lane westbound traffic

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

Streit Road Bridge (McHenry County, Illinois)
Pony truss bridge over North Branch Kishwaukee Creek on Streit Road
Open to two-lane traffic

Stringtown Bridge (Cole County, Missouri)
Built 1930; made obsolete by new bridge in 1974
Through truss bridge over North Moreau Creek on Hemstreet Road west of Jefferson City
Open to two-lane traffic

Stueber Road Bridge (Crawford County, Missouri)
Built 1917
Pony truss bridge over a branch of Little Bourbeuse River on Stueber Road
Open to traffic

Sugar Creek 350 West Bridge (Boone County, Indiana)
Built ca. 1910
Through truss bridge over Sugar Creek on CR 350 West (Creek Road) just east of I-65
Open to one-lane traffic

Sugar Creek Bridge (Pike County, Missouri)
Pony truss bridge over Sugar Creek on CR 115
Open to one-lane with a 7 ton weight traffic

Sulphur Springs Railroad Bridge (Hillsborough County, Florida)
Through truss bridge over Hillsborough River on the former Seaboard Air Line Railway (now CSX)
Open to traffic

Sumner Road Bridge (Chariton County, Missouri)
Built 1925
Through truss bridge over Locust Creek on Sumner Road
Open to traffic

Sumnerville Station Bridge (Ottawa County, Kansas)
Built ca. 1930
Pony truss bridge over Solomon River on Quaker Road
Open to traffic

Sunshine Drive Bridge (Jefferson County, Missouri)
Built 1934; replaced 2004
Lost through truss over Joachim Creek on Sunshine Drive (Old Route A) in Festus
Removed to make room for new concrete bridge

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

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

Taylor Bridge (Marion County, Missouri)
Built 1929, replacing an earlier bridge
Through truss bridge over North Fabius River on CR 313 (Old US 24/61)
Open to traffic with a weight limit

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 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

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 (Goodhue County, Minnesota)
Built 1910 by A.Y. Bayne & Co. of Minneapolis and Louis P. Wolff, engineer
Through truss bridge over Cannon River on Third Street in Cannon Falls
Open to one-lane traffic

Thompson Creek Bridge (East Feliciana Parish, Louisiana)
Built 1925
Through truss bridge over Thompson Creek on a local road, west of Norwood
Open to one-lane traffic, but in very poor condition

Timpas Bridge (Otero County, Colorado)
Built 1924, rehabilitated in 1966
Through truss bridge over Timpas Creek on CR N, just off US 350
Open to one-lane 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

Turkey Creek Bridge (Cedar County, Missouri)
Built ca. 1940; rehabilitated 1984
Pony truss bridge over Turkey Creek on CR 752 (Powerline Road)
Open to one-lane traffic

Turkey Creek Katy Bridge (Callaway County, Missouri)
Built 1926 by the American Bridge Co.
Through truss bridge over Turkey Creek on the Katy Trail (former MKT Railroad) north of Jefferson City in Jefferson City
Open to pedestrians and bicyclists only

Turkey Creek Old US 65 Bridge (Pettis County, Missouri)
Built 1925
Pony truss bridge over Turkey Creek on Claycomb Road (Old US 65) north of Sedalia
Open to traffic

Turner Station Bridge (Greene County, Missouri)
Built ca. 1925
Through truss bridge over James River on FM 148 (Old Route D) east of Springfield
Only to pedestrians only, but could still handle two-lane vehicular traffic

Two Mile Creek Bridge (Polk County, Arkansas)
Built 1920
Through truss bridge over Two Mile Creek on CR 37 (Old US 71)
Open to one-lane traffic

Tyronza River AR 297 Bridge (Mississippi County, Arkansas)
Built 1968; replaced 2006
Lost pony truss bridge over Tyronza River on AR 297 just north of Dyess in Dyess
Replaced by a new bridge

Vanduser Bridge (Stoddard County, Missouri)
Built 1950
Through truss bridge over Spoil Bank on Route DD, west of Vanduser
Open to two-lane traffic

Vulcan MO 49 Bridge (Iron County, Missouri)
Built 1924
Pony truss on MO 49 over Vulcan Creek at the intersection with Route BB at Vulcan
Open to two-lane traffic

Waggle Creek Bridge (Clark County, Arkansas)
Built ca. 1930; rehabilitated 1990
Pony truss bridge over Waggle Creek on Hasley Road (CR 17)
Open to traffic

West Fork Cache River AR 230 Bridge (Lawrence County, Arkansas)
Built 1967
Pony truss bridge over West Fork Cache River on AR 230
Open to traffic

West Fork of Twelvepole Creek Bridge (Wayne County, West Virginia)
Built 1922
Through truss bridge over West Fork of Twelvepole Creek on Old Twelvepole Road (CR 52/49)
Open to traffic

White River MO 76 Bridge (Taney County, Missouri)
Built ca. 1953
Five-span through truss bridge over White River (Bull Shoals Lake) on MO 76 near Forsyth
Open to two-lane traffic

Whitewater Bridge (Cape Girardeau County, Missouri)
Built 1954, replacing an older bridge built ca. 1880 located a short distance to the north
Pony truss bridge over Whitewater River on Route A, just west of Whitewater
Open to two-lane traffic

Whitewater River MO 34 Bridge (Cape Girardeau County, Missouri)
Built 1932
Pony truss bridge over Whitewater River east of Burfordville
Open to two-lane traffic on a major state highway

Wilsey Road Bridge (Posey County, Indiana)
Built 1918
Through truss bridge over Black River on Wilsey Road
Open to traffic

Winnebago River Bridge (Floyd County, Iowa)
Built 1925; rehabilitated 1957
Through truss bridge over Winnebago River on 200th Street (CR B43) northwest of Rockford
Open to traffic

Wittenberg Railroad Bridge (Perry County, Missouri)
This railroad line was completed in 1904, although I don't know if this particular bridge is that old or not
Through truss bridge over Brazeau Creek at Wittenberg on the Burlington Northern Santa Fe railroad
Still in use

Wolf Bayou Bridge (Pulaski County, Arkansas)
Built 1924
Lost pony truss bridge over Wolf Bayou on CR 85 (Old AR 30) in Scott
Replaced by a new bridge

Woodside Road Bridge (Sevier County, Arkansas)
Built 1912; replaced 2003
Lost pony truss bridge over Saline River on Woodside Road (Sevier CR 23)
Replaced by new train car chassis bridge

Xenia Bridge (Carroll County, Indiana)
Built 1931 as a State Highway bridge and relocated in 1945
Through truss bridge over Wildcat Creek on Prince William Road
Currently undergoing repairs through mid-April 2006

Zalma Bridge (Bollinger County, Missouri)
Built 1929-30, replacing a 1900 span that was then moved to Gipsy
Through truss bridge over Castor River on MO 51 at Zalma
Open to one-lane traffic on a paved road

Zion Bridge (Madison County, Missouri)
Built 1922
Pony truss bridge over Twelvemile Creek at Zion on CR 417 (Old US 67)
Open to traffic