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Built during 1970s

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Salt Creek Bridge (Seminole County, Oklahoma)
Built ca. 1970
Pony truss bridge over Salt Creek on N3530
Open to traffic

Salt Creek Road Bridge (Del Norte County, California)
Built 1975
Pony truss bridge over Salt Creek on Salt Creek Road in Klamath
Open to traffic

Samoa Bridge (Humboldt County, California)
Built 1971
Steel stringer bridge over Humboldt Bay on CA255
Open to traffic

San Francisco Street Bridge (Santa Fe County, New Mexico)
Built 1974
Concrete rigid frame bridge over Arroyo De Las Mascaras on San Francisco Street in Santa Fe
Open to traffic

Sand Arroyo Bridge (Baca County, Colorado)
Built 1970
Concrete tee beam bridge over Sand Arroyo on CR 44
Open to traffic

Sand Creek Bridge (Ringgold County, Iowa)
Built 1972
Pony truss bridge over Sand Creek on a local road
Open to traffic

Sandy Creek Bridge (Jefferson County, New York)
Built 1978
Pony truss bridge over Sandy Creek on So Skinner Road
Open to traffic

Sandy Creek Bridge #1 (Lincoln County, Missouri)
Bridge over Sandy Creek on Route Z
Open to traffic

Sandy Creek Bridge #2 (Lincoln County, Missouri)
Built 1970
Steel stringer bridge over Sandy Creek on Route Z
Open to traffic

Sanes Creek Road Bridge (Franklin County, Indiana)
Washed away in fooding March 20, 2020. Two cars were washed away with 6 lives lost.
Lost Bridge over Sanes Creek on Sanes Creek Road
Destroyed by flooding

Sarasota Bay Bridge (Sarasota County, Florida)
Built 1972
Bascule bridge over Sarasota Bay on FL 758 (Siesta Drive) in Siesta Key
Open to traffic

Satartia Bridge - Replacement (Yazoo County, Mississippi)
Built 1976
Vertical lift bridge over Yazoo River on Satartia Road
Open to traffic

Sawtooth Creek Bridge (Ravalli County, Montana)
Built 1972
Concrete arch bridge over Sawtooth Creek on MT 531
Open to traffic

Schlegel Road-Swamp Creek Bridge (Berks County, Pennsylvania)
Built 1970
Beam bridge over Swamp Creek on Schlegel Road
Open to traffic

Schlenker Road Bridge (Union County, Illinois)
Built 1977
Steel stringer bridge over Bradshaw Creek on Schlenker Road (TR 99)
Open to traffic

Scotts Ford Bridge (Crawford County, Missouri)
Built 1977
Low-water bridge over Meramec River on Thurman Lake Road
Open to traffic

Scrambling Creek Bridge (Clinton County, Iowa)
Built 1974
Arch bridge over Scrambling Creek on 110th Street
Open to traffic

Seboyeta Creek Bridge (Cibola County, New Mexico)
Built 1975; replaced 2010
Lost deck truss bridge over Seboyeta Creek on CR 1
Replaced by a new bridge

Second Clark Lane Bridge (Union County, Illinois)
Built 1977
Wooden deck bridge over a branch of Dutch Creek on Clark Lane (TR 72)
Open to one-lane traffic with a 7 ton weight limit

Second Street Black River Bridge ( Replacement) (Van Buren County, Michigan)
Beam bridge over BLACK RIVER on SECOND STREET
Open to traffic

Second Street Bridge (Rice County, Minnesota)
Built 1973
Steel stringer bridge over Cannon River on MN Hwy. 19
Open to traffic

Seven Mile Creek Bridge (Cass County, Iowa)
Built 1976
Pony truss bridge over Seven Mile Creek on Upland Road
Open to traffic

Seven Mile Creek Bridge (Cass County, Iowa)
Built 1978
Pony truss bridge over Seven Mile Creek on Wichita Road
Open to traffic

Seven Mile Creek Bridge (Cass County, Iowa)
Built 1979
Pony truss bridge over Seven Mile Creek on 680th Street
Open to traffic

Shade-Lohman Bridge (Peoria County, Illinois)
Built 1975
Pair of cantilevered through truss bridges over the Illinois River on I-474 south of Peoria in Bartonville
Open to four lanes of traffic

Shaw Bridge (Poinsett County, Arkansas)
Built 1976
Steel stringer bridge over Left Hand Chute of Little River on Shaw Bridge Lane
Closed to all traffic

Shaw Creek Bridge (Gage County, Nebraska)
Built or relocated here in 1971
Pony truss bridge over Shaw Creek on S. 82nd Road (FAS 3265)
Open to traffic

Sheboygan River Bridge (Sheboygan County, Wisconsin)
Built 1973
Stringer bridge over Sheboygan River on Lrd Pennsylvania A
Open to traffic

Shellpot Creek Bridge (New Castle County, Delaware)
built in 1978
Pony truss bridge over Shellpot Creek on Hay Road
scheduled for demolition

Sherar's Bridge (1979) (Wasco County, Oregon)
Built 1979
Bridge over Deschutes River on OR206
Open to traffic

Shoal Creek US 50 Bridge (Clinton County, Illinois)
Built in 1973 in a failed expansion of US 50
Abandoned steel stringer bridge over Shoal Creek on Unused Portion of US 50
Derelict/abandoned

Shoshone River Bridge (Big Horn County, Wyoming)
Built 1977; rehabilitated 2011
Steel stringer bridge over Shoshone River on Road 5
Open to traffic

Shreveport-Barksdale Bridge (Caddo Parish, Louisiana)
Built 1972; rehabilitated 2002
Girder bridge over Red River; Clyde Fant Parkway on LA 3032
Open to traffic

Sidney Sherman Bridge (Harris County, Texas)
Built 1973
Steel stringer bridge over Houston Ship Channel on Ih 610
Open to traffic

Silver Bridge (Coconino County, Arizona)
Built to carry water pipeline
Wire suspension bridge over Colorado River on pedestrian / pack trail


Silver Creek Bridge (Madison County, Illinois)
Bridge over Silver Creek on Lebanon Road (County 32)
Open to traffic

Silver Creek Bridge (Marion County, Oregon)
Built 1974
Stringer bridge over Silver Creek on Main Street
Open to traffic

Sixth Street Bridge (Minnehaha County, South Dakota)
Built 1975
Bridge over Big Sioux Rv on Sixth Street E of Phillips Ave. in Sioux Falls
Open to traffic

Skidaway Narrows Bridge (Chatham County, Georgia)
Built in 1971; replaced 2013
Pony/through plate girder bridge over Skidaway Narrows on US 80
Replaced by a new bridge

Skyway-Lake Avenue Bridge (Monroe County, New York)
Built 1974
Pony truss bridge over Lake Avenue on Walkway Bldg-Bldg
Open to authorized vehicles only

Slader Creek Bridge - Rt13c (Replacement) (Allegany County, New York)
Bridge
Open to traffic

Slattum - Hewett Suspension Footbridge (Ransom County, North Dakota)
Built 1974
Wire suspension bridge over Sheyenne River on pedestrian pathway
Open to pedestrians only

Smith Branch FLW 28 Bridge (Pulaski County, Missouri)
Built 1971
Pony truss bridge over Smith Branch on FLW Road 28 in Fort Leonard Wood
Open to military traffic

Soldier River Bridge (Monona County, Iowa)
Built 1974; rehabilitated 1993; replaced 2009
Lost pony truss bridge over Soldier River on 225th Street
Replaced by a new bridge

SOUDERTON PIKE- PLEASANT SPRINGS CREEK.Bridge (Replacement) (Bucks County, Pennsylvania)
Bridge
Open to traffic

South Branch Papillion Creek Bridge (Sarpy County, Nebraska)
Built 1970
Through truss bridge over South Branch Papillion Creek on 168th Street, 3 mi. east and 3.2 mi. north of Gretna
Open to traffic

South Branch Rock Creek Bridge (Somerset County, Maryland)
Built 1977
Wooden bridge over South Branch Rock Creek on MD 363
Open to traffic

South Carolina Highway 9 Catawba River Bridge (WB) (Lancaster County, South Carolina)
Built 1975
Steel stringer bridge over Catawba River on SC 9 (WB)
Open to traffic

South Fork Clanton Creek Bridge (Madison County, Iowa)
Built 1978
Warren Pony truss bridge over South Fork Clanton Creek on Limestone Avenue
Open to traffic

South Fork Molalla River Bridge (Clackamas County, Oregon)
Built 1974
Stringer bridge over South Fork Molalla River on BLM Road #06-3E-06
Open to traffic

South Fork Salt River Bridge (Monroe County, Missouri)
Built 1977
Steel stringer bridge over South Fork Salt River on Mo 107
Open to traffic

South Hampton Road Bridge (Daviess County, Kentucky)
Concrete stringer bridge over Burnett Fork on South Hampton Road
Open to traffic

South Lafourche Bridge (Lafourche Parish, Louisiana)
Built 1972
Vertical lift bridge over Bayou Lafourche on LA 308S in Galliano
Open to traffic

South Otter Creek Bridge (Lucas County, Iowa)
Built ca. 1970
Pony truss bridge over South Otter Creek on 120th Avenue
No longer exists

South Willow Creek Bridge (Monona County, Iowa)
Built 1973
Pony truss bridge over South Willow Creek on Teak Avenue
Open to traffic

Southern Railroad -AL 133 Bridge (Colbert County, Alabama)
Built 1972
Steel stringer bridge over Al. # 133 on Southern Railroad
Open to traffic

Southern Railway Bridge (York County, South Carolina)
Built 1973, replaced previous bridge at this location
Bridge over Norfolk Southern Railway, Dave Lyle Blvd. on Norfolk Southern Railway
Open to traffic

Spanish River Boulevard Bridge (Palm Beach County, Florida)
Built 1971
Pair of bascule bridges over Intracoastal Waterway on Spanish River Blvd. in Boca Raton
Open to traffic

Spencer Creek Covered Bridge 25-92-A (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

Spunky Creek Bridge (Rogers County, Oklahoma)
Built 1976
Stringer bridge over Spunky Creek on E0580 (Pine St.)
Open to traffic

SR 222-Penn Ave NSRR Bridge (Berks County, Pennsylvania)
Built 1977
Steel stringer bridge over Sr 3422,Sr 8028,Norfksou on Sr 222
Open to traffic

Sr 563 (Sikes Blvd) Bridge (Polk County, Florida)
Built 1975
Steel stringer bridge over Sr 563 (Sikes Blvd) on CSX Railroad


St Bernadine Street-Angelica Creek Bridge (Old) (Berks County, Pennsylvania)
Built 1975
Concrete tee beam bridge over Angelica Creek on Bernadine Street
Replaced by a new bridge

State Highway KK Overpass (Lincoln County, Missouri)
Built 1976
Bridge over US Hwy 61 on State Hwy KK
Open to traffic

Stewart Point Rd Hillside bridge (Sonoma County, California)
Built 1970, replaced 2010
Timber stringer bridge over Hillside on Stewart Point Road
Replaced, new structure is open to traffic

Stoddard County Road 772 Bridge No. 1 (Stoddard County, Missouri)
Built 1970
Wooden deck bridge over Ditch No. 4 on CR 772
Open to traffic

Stoddard County Road 772 Bridge No. 2 (Stoddard County, Missouri)
Built 1973
Wooden deck bridge over a drainage ditch on CR 772
Open to traffic

Stoddard County Road 792 Bridge (Stoddard County, Missouri)
Built 1972; replaced 1998
Lost pony truss bridge over a drainage ditch on CR 792
Open to traffic

Stratford Avenue Bridge (1975) (Fairfield County, Connecticut)
Built 1975
Vertical lift bridge over Pequonnock River on CT 130 in Bridgeport
Open to traffic

Stroh Road-Tonawanda Creek Bridge (Genesee County, New York)
Built 1976
Lost Steel stringer bridge over Tonawanda Creek on CR 1
Replaced by a new bridge

Sugar Creek Bridge (Henry County, Iowa)
Built 1976
Pony truss bridge over Sugar Creek on Clayton Avenue
Open to traffic

Sugar Creek Bridge (Caddo County, Oklahoma)
Built 1971
Pony truss bridge over Sugar Creek on IRR 0816C
Open to traffic

Sugar Creek US 50 Bridge (Clinton County, Illinois)
Built in 1973 in a failed expansion of US 50
Abandoned steel stringer bridge over Sugar Creek on Unused Portion of US 50
Derelict/abandoned

Sulphur Creek Bridge (Lincoln County, Missouri)
Bridge over Sulphur Creek on Hwy Z
Open to traffic

Sulphur River Bridge (Red River County, Texas)
Built 1973
Stringer bridge over Sulphur River on Sh 37
Open to traffic

Summer Creek Bridge (Van Buren County, Iowa)
Built 1971
Pony truss bridge over Summer Creek on Timber Road
Open to traffic

Summer Crossing Bridge (Sonoma County, California)
Built 1977, seasonal, removed in winter.
Steel stringer bridge over Russian River on Vacation Beach Road
Open to traffic

Summit St S Bridge (Jackson County, Missouri)
Built 1979; Refurbished 2015
Girder bridge over I-670 on Summit St S
Open to traffic

Susan Foster Myers Bridge (Allegany County, New York)
Built 1973
Steel stringer bridge over Rte 275 on Rte I86
Open to traffic

SW 46th Road Bridge (Buchanan County, Missouri)
Built ca. 1970
Pony truss bridge over Sugar Creek on SW 46th Road
Open to traffic

Swamp Creek Road-Swamp Creek Bridge (Berks County, Pennsylvania)
Built 1976
Beam bridge over Swamp Creek on T-666 Swamp Ck Road
Open to traffic

Swift River Bypass Bridge (Carroll County, New Hampshire)
Built 1975 as bypass around Swift River Covered Bridge
Steel stringer bridge over Swift River on West Side Road/Washington Street
Open to traffic

Talley Bend Bridge (St. Clair County, Missouri)
Steel stringer bridge over Lake Truman on State Hwy C
Open to traffic

Tarkio River Bridge (Page County, Iowa)
Built 1974
Through truss bridge over Tarkio River on 300th Street
Replaced by a new bridge

Tarkio River CR 394 Bridge (Atchison County, Missouri)
Built 1975
Pony truss bridge over Tarkio River on CR 394
Open to traffic

Tarrytown Lighthouse Footbridge (Westchester County, New York)
Built 1975
Modern bowstring pony truss bridge over Hudson River on Tarrytown Light-Kingsland Point Path
Open to pedestrians only

Tchoutacabouffa River Bridge (Harrison County, Mississippi)
Built 1973
Open grate deck girder swing bridge over Tchoutacabouffa River on Cedar Lake Road
Open to traffic

Teche Bayou Bridge (St. Mary Parish, Louisiana)
Built 1972
Swing bridge over Teche Bayou on Sorrell Bridge App Road
Open to traffic

Tensas River Bridge (Catahoula Parish, Louisiana)
Built 1971
Vertical lift bridge over Tensas River on US 425 & LA 15 (Northbound) at Clayton
Open to traffic

TGRR - Studio Backlot Overpass (N) (St. Louis County, Missouri)
Built 1971
Concrete rigid frame bridge over Pedestrian Path on Tommy G. Robertson Railroad/Six Flags Railroad
Open to traffic

TGRR - Studio Backlot Overpass (S) (St. Louis County, Missouri)
Built 1971
Concrete rigid frame bridge over Pedestrian Path on Tommy G. Robertson Railroad/Six Flags Railroad
Open to traffic

Thatcher Road-Tohickon Creek Bridge (Replacement) (Bucks County, Pennsylvania)
Built 1973
Steel stringer bridge over Tohickon Creek on Thatcher Road
Open to traffic

The Crossroads Bridge (Merrimack County, New Hampshire)
Twin span bridge built 1976; SB bridge rehabiliated 2011; NB bridge rehabilitated 2013
Steel stringer bridge over Merrimack River & Railroad on Interstate 93 (Alan B. Shepard Highway)
Open to traffic

The Suspension Bridge (Trinity County, California)
Built 1974 by the Wills Brothers and rehabilitated c. 2015
Wire suspension bridge over Hayfork Creek on Trail off of Pattison Peak Road
Open to pedestrians only

Theresa Bridge (Replacement) (Dodge County, Wisconsin)
Built 1971
Bridge
Open to traffic

Thornhill Cemetery Road Bridge (Lincoln County, Missouri)
Bridge over Little Sugar Creek on Thornhill Cemetery Road
Open to traffic

Tick Creek Bridge (Alcorn County, Mississippi)
Built 1970
Steel stringer bridge over Tick Creek on 400
Open to traffic

Tolt River Bridge (King County, Washington)
Built 1977
Through truss bridge over Tolt River on WA 203 in Carnation
Open to traffic

Tonquin Bridge (Grays Harbor County, Washington)
Built 1970
Timber stringer bridge over Lake Minard on Tonquin Avenue
Closed to all traffic

Tony Creek Bridge (Comanche County, Oklahoma)
Built 1977
Pony truss bridge over Tony Creek on Tony Creek Rd. (N2620 Rd.)
Open to traffic