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Built during 1970s

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11th Street Viaduct (Minnehaha County, South Dakota)
Built 1971; rehabilitated 1986
Steel stringer bridge over 3rd Ave, Big Sioux R & RR on 11th Street in Sioux Falls
Open to traffic

155th Street Bridge (Cedar County, Iowa)
Built 1976
Pony truss bridge over Yankee Run on 155th Street
Removed

1st Street Bridge (Le Sueur County, Minnesota)
Built 1978
Stringer bridge over Cannon River on 1st Street in Waterville
Open to traffic

245th Street Bridge (Fayette County, Iowa)
Built 1973
Pony truss bridge over an unnamed creek on 245th Street (245th St)
Open to traffic

36th Street Bridge (Kanawha County, West Virginia)
Built 1975
Deck plate girder bridge over Kanawha River on 36th Street SE (CR 60/62)
Open to traffic

7th Street Footbridge (Hancock County, Iowa)
Relocated here and narrowed 1976
Warren pony truss bridge over Winnebago River on 7th Street Footpath
Open to pedestrians only

Ackerman Ditch CR 342 Bridge (Butler County, Missouri)
Built 1976
Wooden bridge over Ackerman Ditch on CR 342
Open to one-lane traffic

Adolph Whitaker Road Bridge (Holmes County, Florida)
Built 1971; rehabilitated 2000
Bailey Truss bridge over Wrights Creek on Adolph Whitaker Road
Open to traffic

Albert Lea Lake Interstate Bridge (Freeborn County, Minnesota)
Built 1970
Stringer bridge over Albert Lea Lake on I 35
Open to traffic

Alder Point Road Bridge (Humboldt County, California)
Built 1972
Steel stringer bridge over Eel River and NWP RR tracks on Alderpoint Road
Open to traffic

Allegany Bridge (1973) (Cattaraugus County, New York)
Stringer bridge over ALLEGHENY RIVER on FIVE MILE RD
Open to traffic

Allen's Bridge (Greene County, Tennessee)
Covered Bridge destroyed by flood 1901, Iron Truss Bridge demolished 1976
Concrete deck girder bridge over Nolichucky (Nolachucky) River
Open to traffic

Alley Spring Branch Bridge (Shannon County, Missouri)
Built 1975; rehabilitated 1983
Steel stringer bridge over Alley Spring Branch on Service Road
Intact but closed to all traffic

Amite River LA 22 Bridge (Livingston Parish, Louisiana)
Built 1974
Swing bridge over Amite River on LA 22 at Clio
Open to traffic

Antioch Bridge (1978) (Contra Costa County, California)
The current bridge was completed and opened to traffic in 1978. It measures 1.8 miles (2.9 km). It replaced the original structure that was built in 1926 by Aven Hanford and Oscar Klatt, who went on to build the original span of the Carquinez Bridge.
Concrete deck girder bridge over San Joaquin River on CA-160
Open to traffic

Arbogast Road Bridge (1972) (Branch County, Michigan)
Built 1972; closed 2009; replaced 2016
Lost Bridge over St. Joseph River on Arbogast Road
Replaced by a new bridge

Archie Stevenot Memorial Bridge (Calaveras County, California)
Built 1976
Concrete segemental box girder bridge over Stanislaus River (New Melones Reservoir) on Golden Chain Highway (CA 49)
Open to traffic

Atchafalaya Basin Bridge (St. Martin Parish, Louisiana)
Built 1971
Pair of 16+ mile bridges over the Atchafalaya Basin on I-10
Open to traffic

Atchafalaya River LA 1 Bridge (Avoyelles Parish, Louisiana)
Built 1971
Cantilevered Warren through truss bridge over Atchafalaya River on LA 1 at Simmesport in Simmesport
Open to traffic

Atchafalaya River US 190 Bridge (St. Landry Parish, Louisiana)
Built 1973 (WB) and 1988 (EB)
Pair of through truss bridges over Atchafalaya River on US 190 at Krotz Springs
Open to traffic

ATSF - Limit Street Overpass (Leavenworth County, Kansas)
Concrete box beam bridge over Limit Street on AT&SF RR
Bridge removed and not replaced

Auburn-Foresthill Bridge (Placer County, California)
Built 1972
Deck truss bridge over North Fork American River on Auburn-Foresthill Road in North Auburn
Open to traffic

Babbs Covered Bridge 19-03-01 #2 (Cumberland County, Maine)
Built 1976
Queenpost through truss bridge over Presumpscot River on Hurricane Road
Open to all traffic

Bachmayer Park--Ellis Park Bridge (Lenawee County, Michigan)
Built 1977-1978; rehabilitated and handicap-accessible ramps added 2018
Timber arch bridge over River Raisin on Pedestrian path
Open to pedestrians only

Bailey Road -Genesee River Bridge ( Replacement) (Wyoming County, New York)
Stringer bridge over GENESEE RIVER on WHISKEY BRIDGE
Open to traffic

Barge Basin PA 28 Bridge (Allegheny County, Pennsylvania)
Built 1971; rehabilitated 2004
Girder bridge over Barge Basin on PA 28
Open to traffic

BART/MUNI - Market Street Subway (San Francisco County, California)
Originally built 1973 for Bay Area Rapid Transit, San Francisco Municipal Railway connection added in 1980
Tunnel on Bay Area Rapid Transit & San Francisco Municipal Railway
Open to traffic

Barton Bridge (Clackamas County, Oregon)
Built 1970 using main span from Eagle Creek Bridge BH 45564
Steel tied arch bridge over Clackamas River on Bakers Ferry Road
Open to traffic

Bay Road Bridge (Pope County, Illinois)
Built or relocated here in 1977; replaced 2007
Lost pony truss bridge over Bay Creek on Bay Road (TR 137), 2.5 mi. west of Homberg
Replaced by a new bridge

Bayou Boeuf/Kraemer Bridge (Lafourche Parish, Louisiana)
Built 1976
Vertical lift bridge over Bayou Boeuf on LA 307
Open to traffic

Bayou Bonfouca LA 433 Bridge (St. Tammany Parish, Louisiana)
Built 1976
Swing bridge plate girder over Bayou Bonfouca on LA 433
Open to traffic

Bayou Dulac LA 57 Bridge (Terrebonne Parish, Louisiana)
Built 1971
Swing bridge over Bayou Dulac on LA 57 in Dulac
Open to traffic

Bayou Lafourche Bridge (Assumption Parish, Louisiana)
Built 1977
Stringer bridge over Bayou Lafourche on LA 70 Spur
Open to traffic

Bayou Lafourche Bridge (Assumption Parish, Louisiana)
Built 1976
Slab bridge over Bayou Lafourche @ Munson on La0402
Open to traffic

Bayou Teche LA 322 Bridge (St. Mary Parish, Louisiana)
Built 1971
Swing bridge over Bayou Teche on LA 322 in Franklin
Open to traffic

Bayview Bridge (Door County, Wisconsin)
Built 1978
Bascule bridge over Sturgeon Bay on WI 42/WI 57 in Sturgeon Bay
Open to traffic

Bear Creek Bridge (Searcy County, Arkansas)
Built 1971
Wooden bridge over Bear Creek on CR 278
Open to one-lane traffic

Beaver Creek Pedestrian Bridge (Lincoln County, Oregon)
Built 1970
Beam bridge over Beaver Creek on Pedestrian Trail
Open to pedestrians only

Benton MacKaye Trail Toccoa River Bridge (Fannin County, Georgia)
Built 1977
Wire suspension bridge over Toccoa River on Benton MacKaye Train
Open to pedestrians

Betsy Ross Bridge (Philadelphia County, Pennsylvania)
Built 1973
Truss bridge on NJ 90 over Delaware River, Richmond Street, River Road, Hedley Street
Open to traffic

Bicentennial Bridge (Berrien County, Michigan)
Built 1976; repaired 2002
Deck girder bridge over Benton Harbor on Main Street (Business Loop I-94)
Open to traffic

Big Creek Ditch AR 349 Bridge (Craighead County, Arkansas)
Built 1971; replaced 2006
Lost pony truss bridge over Big Creek Ditch on AR 349
Replaced by new bridge

Big Horn River Bridge (Highway - near Manderson) (Big Horn County, Wyoming)
Built 1978
Steel stringer bridge over Big Horn River on US 16
Open to traffic

Big Mac Bridge (Hamilton County, Ohio)
Constructed started 1971; opened to limited traffic 1977; dedicated 1981; entire I-471 project completed 1985
Pair of tied-arch bridges over the Ohio River on I-471 in Cincinnati
Open to eight total lanes of traffic

Big Muddy River Bridge (Jackson County, Illinois)
Built 1980
Bridge over Big Muddy River on Reed Station Road
Open to traffic

Big Shoal Creek Bridge (Logan County, Arkansas)
Built 1970
Beam bridge over Big Shoal Creek on CR 125
Open to traffic

Big Spanish Channel Bridge (Monroe County, Florida)
Built 1972
Stringer bridge over Big Spanish Channel on Sr-5 (Us-1) Nb
Open to traffic

Big Spring Bridge (Carter County, Missouri)
Built 1977; demolished 2019
Lost wooden bridge over Spring Branch on Pea Vine Road beyond the end of MO 103 at Big Spring
Replaced by a new bridge

Big Walker Mountain Tunnel (Bland County, Virginia)
Built 1972
Tunnel under Big Walker Mountain on I-77
Open to traffic

Biloxi Back Bay Bridge (Harrison County, Mississippi)
Built 1973
Bridge over Biloxi Back Bay on I-110
Open to traffic

Birmingham Bridge (Allegheny County, Pennsylvania)
Built 1976
Steel through arch bridge over Monongahela River in Pittsburgh
Open to traffic

Black Bayou Bridge (Calcasieu Parish, Louisiana)
Built 1979
Pontoon Swing bridge over the Intracoastal Waterway on LA 384
Open to traffic

Black River Bridge (Georgetown County, South Carolina)
Built 1974
Stringer bridge over Black River on Sc 51
Open to traffic

Blue Heron Bridge (Palm Beach County, Florida)
Built 1976
Stringer bridge over Intracoastal Waterway on Sr A1a
Open to traffic

BNSF - 7th Street Bridge (Burleigh County, North Dakota)
Built 1979
Steel stringer bridge over 7th Street (ND-1804) on BNSF Railway
Open to traffic

BNSF - Flathead Tunnel (Lincoln County, Montana)
Built 1970
Tunnel on BNSF Kootenai River Subdivision
Open to traffic

BNSF - Hartson Avenue Overpass (Spokane County, Washington)
Built 1972 during line relocations due to the Burlington Northern merger in 1970. Replaced a previous bridge.
Steel stringer bridge over Hartson Avenue on BNSF Columbia River Subdivision
Open to traffic

BNSF - Indian Canyon Bridge (Spokane County, Washington)
Built 1971-72 as part of railroad line relocations in Spokane before EXPO '74 resulting from Burlington Northern merger in 1970. Replaced a large fill, which was then removed.
Beam bridge over Indian Creek on BNSF Columbia River Subdivision
Open to traffic

BNSF - Kickapoo Creek Bridge #8 (Peoria County, Illinois)
Built 1976, South Approach Built 1921
Pony/through plate girder bridge over Kickapoo Creek on BNSF Railway
Open to traffic

BNSF - Latah Creek Viaduct (Spokane County, Washington)
Built 1972 during line relocations due to the Burlington Northern merger in 1970. Built to tie 3 rail lines together: The Great Northern line to Seattle, the Northern Pacific line to Sandpoint, and the SP&S line to Pasco.
Deck girder bridge over Latah Creek, I90 on BNSF
Open to traffic

BNSF - Sand Creek Bridge (Bonner County, Idaho)
Built 1972 during line relocations due to the Burlington Northern merger in 1970. Built to tie Great Northern line on west side of Sand Creek to Northern Pacific line on east side of Sand Creek.
Deck plate girder bridge over Sand Creek, US 2, & US 95 on BNSF Kootenai Subdivision
Open to traffic

BNSF - Snake River Bridge (Franklin County, Washington)
Built 1971
Vertical lift bridge over Snake River on Burlington Northern - Santa Fe Railroad
Open to traffic

BNSF - Spokane River Bridge (Spokane County, Washington)
Built 1972 during line relocations due to the Burlington Northern merger in 1970. Built to tie former Great Northern line to former Northern Pacific line across the Spokane River.
Deck plate girder bridge over Spokane River on BNSF Chewelah Subdivision
Open to traffic

BNSF - Tunnel 1.5 (Skamania County, Washington)
Built 1977
Tunnel on BNSF
Open to traffic

BNSF - US 59 Overpass (Shelby County, Iowa)
Built 1970
Steel stringer bridge over US 59 on BNSF
Open to traffic

BO - West Fork Fourteenmile Creek and Concord Road Bridge (Scott County, Indiana)
Built for the Marble Hill Nuclear Plant in 1977 abandoned in 1984 when the Plant was scrapped
Abandoned concrete stringer bridge over West Fork Fourteenmile Creek and Concord Road on Abandoned Marble Hill Line
Derelict/abandoned

Boca Ciega Bay Bridge (1971) (Pinellas County, Florida)
Built 1971; Replaced 2008-2010
Pair of bascule bridges over Johns Pass Boca Ciega Bay on FL 699 (Gulf Blvd.) in Madeira Beach
Replaced by a new bridge

Boone Pond Ditch Bridge (Stoddard County, Missouri)
Built 1971; replaced 2007
Lost wooden deck bridge over Boone Pond Ditch on CR 250
Replaced by new bridge

Boyer River Bridge (Crawford County, Iowa)
Built 1971
Pony truss bridge over Boyer River on Deloit Blvd/G Avenue
Open to traffic

Boyer River Bridge (Crawford County, Iowa)
Built 1971
Warren Pony truss bridge over Boyer River on 400th Street
Open to traffic

Branch Des Moines River Bridge (Van Buren County, Iowa)
Built 1971
Pony truss bridge over a branch of Des Moines River on 270th Street
Open to traffic

Branch East Nishnabotna River Bridge (Audubon County, Iowa)
Built 1972
Pony truss bridge over a branch of East Nishnabotna River on Lark Avenue
Open to traffic

Branch Fabius Creek Bridge (Davis County, Iowa)
Built 1974
Pony truss bridge over a branch of Fabius Creek on 289th Tr
Open to traffic

Branch White River Bridge (Owen County, Indiana)
Built ca. 1970
Arch bridge over a branch of White River on CR 175 West
Open to traffic

Brandon Road Bridge (Will County, Illinois)
Built 1972
Steel stringer bridge over Des Plaines River on Brandon Road
Open to traffic

Bread Springs Wash Bridge (McKinley County, New Mexico)
Built 1976
Pony truss bridge over Bread Springs Wash on CR 2
Open to traffic

Breton Creek Bridge (Washington County, Missouri)
Built 1972
Bridge over Breton Creek on Lead Street in Potosi
Open to traffic

Breton Creek Bridge (Washington County, Missouri)
Built 1975
Bridge over Breton Creek on Mine Street
Open to traffic

Brickell Key Bridge (Miami-Dade County, Florida)
Built 1973
Stringer bridge over Brickell Bay on Se 8th Street
Open to traffic

Bridge over Incline (Hamilton County, Tennessee)
Built 1970
Beam bridge over Lookout Mountain Incline Railway on Lookout Mountain Scenic Hwy. / Tenn. 148
Open to traffic

Brisco Bridge (Center Way Arch Replacement) (Steuben County, New York)
Stringer bridge over CHEMUNG RIVER on RTE 414
Open to traffic

Brookdale Avenue Bridge (Columbiana County, Ohio)
Built 1973 by the Ohio Bridge Corp., rehabilitated 2011
Modern pony truss bridge over Penn Central Railroad on Hunston Road (CR 443) in East Palestine
Open to traffic

Bruckner Boulevard - Westchester Creek Bridge (Bronx County, New York)
Built 1971
Bridge over Westchester Creek on Bruckner Boulevard
Open to traffic

Brushy Creek Bridge (Guthrie County, Iowa)
Built 1976
Through truss bridge over Brushy Creek on Kopeck Avenue
Open to traffic

BSNF - Rulo 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

Buck Creek Bridge (Audubon County, Iowa)
Built or relocated 1975
Pony truss bridge over Buck Creek on 330th Street
Open to traffic

Bunker Hill Road Bridge (Lincoln County, Missouri)
Bridge over Mill Creek on Bunker Hill Road
Open to traffic

Buquet Bridge (Terrebonne Parish, Louisiana)
Built 1976
Vertical lift bridge over Grand Caillou Bayou on Falgout Canal Road
Open to traffic

Burns Park Covered Bridge 04-60-A (Pulaski County, Arkansas)
Replica covered bridge over East Fork White Oak Bayou in Burns Park, North Little Rock
Open to one lane of traffic

Butler Creek Bridge (Goodhue County, Minnesota)
Built 1979
Timber beam bridge over Butler Creek on County 14
Open to traffic

C&O Canal Bridge (Washington County, Maryland)
Built 1973; rehabilitated 1984
Steel stringer bridge over C&O Canal on Fort Frederick Acc
Open to traffic

C.B. Robinson Memorial Bridge (Hamilton County, Tennessee)
Built 1976
Girder bridge over Tennessee River on Tennessee State Route 319
Open to traffic

Cable Creek Road Bridge (Umatilla County, Oregon)
Built 1975
Kingpost pony truss bridge over Camas Creek on Cable Creek Road
Open to traffic

Campus Drive Bridge (Racine County, Wisconsin)
Built 1970
Concrete arch bridge over Wind Point Creek on Campus Drive in Wind Point
Open to traffic

Canacadea Street-Canacadea Creek Bridge (Allegany County, New York)
Built 1973
Steel stringer bridge with open grate deck over Canacadea Creek on Canacadea Street
Open to traffic

Caņada Del Refugio Bridge (Santa Barbara County, California)
Built 1974
Culvert bridge over Caņada Del Refugio on Refugio Beach Road
Open to traffic

Cane Creek CR 408 Bridge (Butler County, Missouri)
Built 1972
Wooden deck bridge over Cane Creek on CR 408 just north of CR 410
Open to one-lane traffic

Cape County Road 274 Bridge (Cape Girardeau County, Missouri)
Built 1978, replaced 2007
Two-span stringer bridge with wooden deck over a drainage ditch on CR 274 at the Cape-Stoddard county line
Replaced by a new bridge

Captain William Moore Bridge (Skagway, Alaska)
Built 1976
Cable-stayed bridge over Captain William Moore Creek on Klondike Highway in Skagway
Open to traffic

Carlin Highway Tunnel (Elko County, Nevada)
Tunnel on IH-80
Open