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Built during 1970s

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10th Street Bridge (St. Clair County, Illinois)
Built 1972; Demolished 2012
Steel stringer bridge over I-64 on 10th Street (IL 203)
Demolished

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
Open to traffic

175th Street Bridge (Taylor County, Iowa)
Built 1978
Pony truss bridge over West Branch 1 Hundred and 2 River on 175th Street (175th St)
Open to traffic

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

35th Street Bridge (Kanawha County, West Virginia)
Built 1976
Deck plate girder bridge over Kanawha River on 35th Street SE (CR 60/63)
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

4th Street Ramp (Bowie County, Texas)
Built 1975
Ramp from Texas Viaduct NB to W 4th St
Open to one-lane traffic above and below

9th St Bridge (St. Clair County, Illinois)
Built 1972; Demolished 2012
Steel stringer bridge over I-64 on 9th St/ Fau 9214
Demolished

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

Alameda Street Bridge (Santa Fe County, New Mexico)
Built 1979
Concrete arch bridge over Santa Fe River on Alameda Street in Santa Fe
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 ( replacement) (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
Open to traffic

AM - Fort Smith Bridge (Sebastian County, Arkansas)
Originally built by the St. Louis-San Francisco Railroad, now used by the Arkansas & Missouri Railroad
Vertical-lift through truss bridge over the Arkansas River on the Arkansas & Missouri Railroad between Fort Smith and Van Buren in Van Buren
Open for traffic

Ames Road Bridge (Linn County, Missouri)
Built ca. 1970; replaced 2006
Lost pony truss bridge over Parsons Creek on Ames Road
Replaced by new bridge

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 (Sacramento 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 State Route 160
Open to traffic

Arkansas Union Bridge (Washington County, Arkansas)
Built 1971
Concrete tee beam bridge over Over SH 873 (Garland Ave) in Fayetteville
Open to pedestrians above, bus traffic below

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 Bridge (St. Martin Parish, Louisiana)
Built 1972
Girder bridge over Atchafalaya River 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 and 1988
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

Atsfrr & Sand Creek Bridge (Harvey County, Kansas)
Built 1975; demolished 2012-13
Lost Steel stringer bridge over Atsfrr & Sand Creek on Us 50 Hwy
No longer exists

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

B&O Abandoned Marble Hill Line (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

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

Back Creek Bridge (Monroe County, West Virginia)
Built 1977
Metal arch bridge over Back Creek on CR 23/5
Open to traffic

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

Bailwick Road Bridge (Fairfield County, Connecticut)
Built 1970
Concrete arch bridge over Byram River on Bailwick Road in Greenwich
Open to traffic

Bakers Creek Bridge (Pope County, Arkansas)
Built 1970
Lost Pony truss bridge over Bakers Creek on AR-7
Replaced by a new bridge

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

BART - Berkeley Hills Tunnel (Alameda County, California)
Bore completed in 1967, Open for revenue in 1973 they run just north of the Caldecott tunnels
Tunnel under Berkeley Hills on BART (Bay Area Rapid Transport)
Open to traffic

BART/SF 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
Steel tied arch bridge over Clackamas River on Bakers Ferry Road
Open to traffic

Baughmans Creek Bridge (Cass County, Iowa)
Built 1979
Pony truss bridge over Baughmans Creek on 560th Street
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 Blue Pontoon Bridge (Lafourche Parish, Louisiana)
Built 1972
Swing bridge over Intracoastal Waterway (Bayou Blue) on LA 316
Open to traffic

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 over Bayou Bonfouca on LA 433
Open to traffic

Bayou Desiard Bridge (Ouachita Parish, Louisiana)
Built 1976
Concrete stringer bridge over Bayou DeSiard on Sterlington Rd (US 165 NB)
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 Bridge (Comanche County, Oklahoma)
Built 1974
Pony truss bridge over Beaver Creek on IRR E1640
Open to traffic

Beaver Creek US 50 Bridge (Clinton County, Illinois)
Built in 1973 in a failed expansion of US 50
Abandoned concrete rigid frame bridge over Beaver Creek on Unused Portion of US 50
Derelict/abandoned

Beloit Bridge (Lyon County, Iowa)
Built 1971 replacing a one-span pin-connected Pennsylvania through truss bridge built in 1897
Steel stringer bridge over Big Sioux River on Bridge Street (IA)/ 283rd Street (SD)
Open to traffic

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

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 Creek Overflow Bridge (Henry County, Missouri)
Built 1978
Steel stringer bridge over Big Creek Overflow on Mo 7 S
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 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, replacing an earlier wooden bridge
Wooden bridge over Spring Branch on MO 103 at Big Spring Park
Open to traffic

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

Bjarne Ness Memorial Suspension Footbridge (Ransom County, North Dakota)
Built 1971
Wire suspension footbridge over Sheyenne River on pedestrian pathway
Open to pedestrians only

Blackrock Run Bridge (Baltimore County, Maryland)
Built 1974
Pony truss bridge over Blackrock Run on Western Run Road
Open to traffic

Blind River Bridge (St. James Parish, Louisiana)
Built 1977
Slab bridge over Blind River on US-61 NB
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 - Redmond Way Overpass (Abandoned) (King County, Washington)
Built 1972
Pony/through plate girder bridge over Redmond Way/WA 908 on Future rail trail
Open to pedestrians only

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 - 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 Route D Bridge (Greene County, Missouri)
Built 1974: rehabilitated 2010
Steel stringer bridge over BNSF RR on Route D
Open to traffic

Boca Ciega Bay Bridge (Old) (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

Bogue Chitto River Bridge (Washington Parish, Louisiana)
Built 1970
Steel stringer bridge over Bogue Chitto River on LA-437
Open to traffic

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

Boynton Inlet Bridge (Palm Beach County, Florida)
Built 1975
Steel stringer bridge over Boynton Inlet on Sr A1a
Open to traffic

Branch Beaver Creek Bridge (St. Croix County, Wisconsin)
Built 1975
Steel arch bridge over Branch Beaver Creek on 100th Avenue
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 Laughery Creek Bridge (Ripley County, Indiana)
Built 1974
Arch bridge over a branch of Laughery Creek on CR 350 North
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

Broadway Bridge (Replacement) (Branch County, Michigan)
Bridge
Open to traffic