Rock Falls Bridge (Cerro Gordo County, Iowa)
Built 1929 by C.A. Holvik of Mason City, Iowa
Open-spandrel arch bridge over Shell Rock River on Spring Street in Rock Falls
Open to traffic

Rock River Bridge (Rock County, Minnesota)
Built 2000
Bridge over Rock River on Twp 81
Open to traffic

Rock River Bridge (Rock County, Minnesota)
Built 1916
Through truss bridge over Rock River on a local road southeast of Hardwick
Open to one-lane traffic

Rock River Suspension Bridge (Lyon County, Iowa)
Wire suspension bridge over Rock River on private road in Rock Rapids
Open to traffic

Rock River TR 73 Bridge (Rock County, Minnesota)
Built 1918
Pony truss bridge over Rock River on Township Road 73
Open to one-lane traffic

Rock Valley US 18 Bridge (Sioux County, Iowa)
Built 2002
Stringer bridge over Rock River on US 18
Open to traffic

Rock, Nobles, and Western Railroad Bridge and Dam (Rock County, Minnesota)
Bridge over Rock River at City Park in Luverne, 0.3 miles south of Main Street Bridge on Rock, Nobles, and Western Railroad
Open to traffic

Rockford Bridge (Floyd County, Iowa)
Built 1922; rehabilitated 1977
Two-span open-spandrel arch bridge over Shell Rock River on E. Main Avenue in Rockford
Open to traffic

Rocky Creek Bridge (Lincoln County, Oregon)
Built 1927; rehabilitated 2001
Concrete arch bridge over Rocky Creek on US 101 Frontage Road
Open to traffic

Rocky Point Bridge (Jackson County, Oregon)
Built 1919
Concrete arch bridge over Rogue River on OR 99
Open to traffic

Roebling Suspension Bridge (Hamilton County, Ohio)
Built 1866 by John A. Roebling. Rehabilitated 1955.
Suspension bridge over the Ohio River between Cincinnati and Covington
Open to two-lane traffic

Rolling Fork KY 289 Bridge (Marion County, Kentucky)
Built 1923; rehabilitated 1972
Through truss bridge over Rolling Fork on KY 289
Open to traffic

Rolling Stone Covered Bridge (Putnam County, Indiana)
Built 1915 by J.A. Britton
Covered bridge over Big Walnut Creek on CR 800 North
Open to traffic

Rome Bridge (Douglas County, Missouri)
Built 1913
Two-span through truss bridge over Beaver Creek on CR 76-436 at Rome, beyond the end of Route A
Open to traffic with a 16 ton weight limit

Roosevelt Island Bridge (New York County, New York)
Built 1955
Vertical lift bridge over East River at Roosevelt Island in New York
Open to traffic

Root River MN 250 Bridge (Fillmore County, Minnesota)
Originally built 1931 in Rochester; relocated here in 1960 to replace a similar bridge that had collapsed
Through truss bridge over Root River on MN 250 north of Lanesboro
Open to traffic

Root Road Covered Bridge (Ashtabula County, Ohio)
Built 1868; rehabilitated 1983
Two-span covered bridge over West Branch Ashtabula River on Root Road
Open to traffic

Rose Creek Bridge (Republic County, Kansas)
Bedstead pony truss bridge over Rose Creek, 2.7 mi. north and 1.0 mi. west of Munden
Open to traffic

Rose Creek Bridge (Republic County, Kansas)
Built 1925
Pony truss bridge over Rose Creek, 2.0 mi. north and 4.7 mi. west of Munden
Open to traffic

Rose Creek Bridge (Republic County, Kansas)
Bedstead pony truss bridge over Rose Creek, 0.5 mi. north and 6.0 mi. west of Munden
Open to traffic

Rosehill Covered Bridge (Lancaster County, Pennsylvania)
Built 1849
Covered bridge over Cocalico Creek on Log Cabin Road
Open to traffic

Roseville Covered Bridge (Parke County, Indiana)
Built 1910 by J.L. Van Fossen; rehabilitated 1977
Two-span covered bridge over Big Raccoon Creek on CR S325W
Open to traffic

Roseville Street Bridge (Logan County, Arkansas)
Built ca. 1935
Pony truss bridge over an unnamed creek on N. Roseville Street in Paris
Open to traffic with a 3 ton weight limit

Ross Island Bridge (Multnomah County, Oregon)
Built 1926
Steel arch bridge over Willamette River on US 26 in Portland
Open to traffic

Rossville Railroad Bridge (Shawnee County, Kansas)
Through truss bridge over Cross Creek on the Union Pacific Railroad at Rossville
Open to traffic

Roubidoux Bridge (Pulaski County, Missouri)
Built 1923; rehabilitated 1939
Five-span concrete arch bridge over Roubidoux Creek on MO 17 in Waynesville
Open to two-lane traffic

Rouggly-Kiepe Road Bridge (Jefferson County, Missouri)
Concrete bridge over Saline Creek on Rouggly-Kiepe Road
Open to one-lane traffic

Round Grove Creek Bridge (Jackson County, Missouri)
Built 1913
Concrete arch bridge over Round Grove Creek on Raytown Road near the Truman Sports Complex in Kansas City
Open to two-lane traffic

Round Spring Bridge (Shannon County, Missouri)
Built 1930
Single open-spandrel arch over Spring Valley Creek on MO 19
Open to traffic on a paved road with no posted weight limits

Roundtree Road Bridge (Greene County, Missouri)
Built by the Canton Bridge Co.
Pony truss bridge over Wilson Creek on Roundtree Road (FM 119/FM 168) in Springfield
Open to one-lane traffic

Roundup Bridge (Musselshell County, Montana)
Built 1893-94 by the Hewett Bridge Co.; relocated in 1911
Wooden through truss bridge over Musselshell River on CR 118
Open to traffic

Route O Bridge (Mississippi County, Missouri)
Built 1936
Stringer bridge over a drainage ditch on Route O
Open to one-lane traffic

Royal Gorge Bridge (Fremont County, Colorado)
Built 1929 for the Royal Gorge Bridge and Amusement Co.
Suspension bridge over the Arkansas River (Royal Gorge) west of Caņon City
Open to vehicular and pedestrian traffic

Ruby Street Bridge (Will County, Illinois)
Built 1935; rehabilitated 1972
Bascule bridge over Des Plaines River on IL 53 (Old US 66) in Joliet
Open to four-lane traffic

Rulo Bridge (Richardson County, Nebraska)
Built 1938
Through truss bridge over Missouri River on US 159 at Rulo
Open to traffic

Rulo Railroad Bridge (Richardson County, Nebraska)
Built 1887; truss sections replaced with new trusses in 1977 but retaining original piers
Warren through truss bridge over Missouri River on BNSF Railroad in Rulo
Open to traffic

Rum River Bridge at CSAH 16 (Mille Lacs County, Minnesota)
Built 1973
Timber stringer bridge over Rum River on Csah 16
Open to traffic

Running Water Trestle (Madison County, Tennessee)
Massive steel plate girder trestle over Running Water Creek and I-24 on the CSX Railroad, west of Chattanooga
Open to traffic

Rupert Covered Bridge (Columbia County, Pennsylvania)
Built 1847; rehabilitated 2000
Covered bridge over Fishing Creek on TR 409 in Bloomsburg
Open to traffic

Rush Creek Covered Bridge (Parke County, Indiana)
Built 1904 by W.M. Hendricks; rehabilitated 1977
Covered bridge over West Fork Rush Creek on CR W900N
Open to traffic

Russell Street Bridge (Minnehaha County, South Dakota)
Built 1955; rehabilitated 1978
Steel stringer bridge over Big Sioux Rv on Russell St (SD Hwy. 38) south of Maple Rd. Bridge in Sioux Falls
Open to traffic

Rye Hill Road Bridge (Sebastian County, Arkansas)
Built 1941 by the Works Progress Administration
Concrete slab bridge over Prairie Creek on Rye Hill Road (CR 90)
Open to traffic

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

S. First Street Bridge (Milwaukee County, Wisconsin)
Built 1957
Bascule bridge over Kinnickinnic River on S. 1st Street in Milwaukee
Open to traffic

Sabula Bridge (Iron County, Missouri)
Built 1922; rehabilitated 1945
Two-span open-spandrel arch bridge over Big Creek on MO 49 north of Sabula
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

Sacramento River Bridge (Shasta County, California)
Built 1941; rehabilitated 1967
Deck truss bridge over Sacramento River on I-5 in Lakehead-Lakeshore
Open to traffic

Sacramento River Bridge (Siskiyou County, California)
Built 1955; rehabilitated 1983
Concrete arch bridge over Sacramento River on I-5 in Dunsmuir
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

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

Salida F Street Bridge (Chaffee County, Colorado)
Built 1907-08 by the Pueblo Bridge Co.
Two-span concrete arch bridge over Arkansas River on F Street in Salida
Open to two-lane traffic on a dead-end city street

Saline Creek MO 17 Bridge (Miller County, Missouri)
Built 1925
Through truss bridge over Saline Creek on MO 17, northeast of Tuscumbia
Open to two-lane traffic

Saline Creek MO 72 Bridge (Madison County, Missouri)
Built 1923; rehabilitated 1975
Pony truss bridge over Saline Creek on MO 72 east of Fredericktown
Open to traffic

Saline Creek Railroad Bridge (Ste. Genevieve County, Missouri)
Through truss railroad bridge over Saline Creek parallel to US 61 north of St. Mary
Still in use

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

Saline River Tributary Bridge (Russell County, Kansas)
Small two span stone arch bridge over Saline River Tributary
Open to traffic

Saline River US 183 Bridge (Ellis County, Kansas)
Built 1933; rehabilitated 1963
Seven-span open-spandrel arch bridge over Saline River on US 183, 13.85 mi. north of I-70
Open to traffic

Salladasburg Bridge (Lycoming County, Pennsylvania)
Built 1941; rehabilitated 1993
Through truss bridge over Larrys Creek on PA 287 in Salladasburg
Open to two-lane 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 IN 130 Bridge (Porter County, Indiana)
Built 1932
Concrete arch bridge over Salt Creek on IN 130
Open to traffic

Salt Creek US 30 Bridge (Porter County, Indiana)
Built 1938
Concrete arch bridge over Salt Creek on US 30
Open to traffic

Salt Creek US 40 Bridge (Howard County, Missouri)
Built 1941
Deck plate girder bridge over Salt Creek and the Katy Trail on US 40
Open to 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

Salt Fork Railroad Bridge (Saline County, Missouri)
Built 1903 by the American Bridge Co.
Deck plate girder bridge over Salt Fork and CR 225 on the Union Pacific Railroad
Open to traffic

Salt River KY 55 Bridge (Spencer County, Kentucky)
Built 1932
Through truss bridge over Salt River on KY 55 in Taylorsville
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

Samson of the Cimarron (Seward County, Kansas)
Built in 1939 by the Rock Island Railroad: replacing several earlier bridges
Deck truss bridge over Cimarron River on Rock Island Railroad
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 Fernando Road Bridge over Pacoima Wash (Los Angeles County, California)
Built 1925; rehabilitated 1940
Concrete arch bridge over Pacoima Wash on San Fernando Road in Los Angeles
Open to traffic

San Fernando Road Bridge over the Arroyo Seco (Los Angeles County, California)
Built 1913
Concrete arch bridge over Arroyo Seco Channel on San Fernando Road in Los Angeles
Open to traffic

San Fernando Road over the Verdugo Wash (Los Angeles County, California)
1936
Pony truss bridge over Verdugo Wash on San Fernando Road in Glendale, Los Angeles County, California
Open to traffic

San Gabriel Blvd over Rubio Wash (Los Angeles County, California)
Built 1914; rehabilitated 1925
Bridge over Rubio Wash on San Gabriel Blvd in San Gabriel
Open to traffic

San Gabriel Canyon Road over the San Gabriel River (Los Angeles County, California)
Built 1933
Deck truss bridge over San Gabriel River on CA 39 in Azusa
Open to traffic

San Gabriel River Parkway over the San Gabriel River (Los Angeles County, California)
Built 1954
Concrete tee beam bridge over San Gabriel River on San Gabriel Riv Pk in Pico Rivera
Open to traffic

San Pascual Ave Over the Arroyo Seco (Los Angeles County, California)
Built 1939
Bridge over Arroyo Seco Channel on San Pascual Ave Br in Los Angeles
Open to traffic

San Pedro Terminal Island Bridge (Los Angeles County, California)
Built 1963; rehabilitated 1990
Suspension bridge over San Pedro Terminal Island on CA 47 in Los Angeles
Open to traffic

San Rafael Avenue over the Arroyo Seco (Los Angeles County, California)
Built 1922
Concrete arch bridge over Arroyo Seco Channel on San Rafael Avenue in Pasadena
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

Sand Creek US 31 Bridge (Jackson County, Indiana)
Built 1936; rehabilitated 1995
Through truss bridge over Sand Creek on US 31
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 Creek MO 79 Bridge (Lincoln County, Missouri)
Built 1938
Through truss bridge over Sandy Creek on MO 79 near Foley
Open to traffic

Sangamon River Bridge (Sangamon County, Illinois)
Built ca. 1950
Two-span through truss bridge over Sangamon River on TR 171, 2.0 mi. east of Clear Lake
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

Santiam Railroad Bridge (Marion County, Oregon)
Built 1906
Pratt through truss bridge over Santiam River on Union Pacific Railroad in Jefferson
Open to traffic

Sappington Branch Bridge (Moniteau County, Missouri)
Built 1925
Tee beam bridge over Sappington Branch on Old US 50, west of California
Open to traffic

Sauk Creek Bridge (Ozaukee County, Wisconsin)
Built 1915; rehabilitated 1928
Concrete arch bridge over Sauk Creek on Grand Avenue (WI 32) in Port Washington
Open to traffic

Saville Covered Bridge (Perry County, Pennsylvania)
Built 1903
Covered bridge over Buffalo Creek on PA 4001
Open to 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

Scottsboro Bridge (Jackson County, Alabama)
Built 1930
Cantilevered through truss bridge over Tennessee River on AL 35 at Scottsboro
Open to traffic

Seaford Bridge (Sussex County, Delaware)
Built 1925 by the Chicago Bascule Bridge Co.
Bascule bridge over Nanticoke River on Front Street in Seaford
Open to traffic