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Built during 1970s

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Conard Road Bridge (Lassen County, California)
Built 1976; rehabilitated 1997
Deck truss bridge over Susan River on Conard Road (FR 30N06)
Open to traffic

Concord Street Bailey Bridge (Scott County, Iowa)
Built 1978; Replaced 1990
Lost Bailey pony truss bridge over Black Hawk Creek on Concord Street
Replaced by a new bridge

Confederate Avenue Bridge (Warren County, Mississippi)
Built 1970
Beam bridge over Jackson Road And Stream on Confederate Avenue
Open to traffic

Constantine Street-Saint Joseph River Bridge (Replacement) (St. Joseph County, Michigan)
Built 1972
Slab bridge over St Joseph River on Constantine Street
Open to traffic

Cooksey Fork Bridge (Lawrence County, Kentucky)
Built ca. 1970
Lost pony truss bridge over Cooksey Fork on Shady Grove Road
Bridge has been replaced.

Cornelius Charlton Memorial Bridge (Mercer County, West Virginia)
Built 1979
Deck truss bridge over Bluestone River on I-77 (NB)
Open to traffic

Cotta Road Bridge (San Joaquin County, California)
Built 1974, reconstructed 1991
Timber stringer bridge over Upland Canal on Cotta Road
Open to traffic

Cottonwood River Bridge (Replacement) (Chase County, Kansas)
Built 1977
Steel stringer bridge over Cottonwood River on X-10.2 Minor Col
Open to traffic

County 20-Bad River Bridge (Replacement) (Haakon County, South Dakota)
Built 1970
Steel stringer bridge over Bad Rv on Ch 20
Open to traffic

County Line Road-Kishwaukee Overflow Bridge (Replacement) (McHenry County, Illinois)
Built 1978
Beam bridge over Kishwaukee Overflow on County Line Road
Open to traffic

County Road 70-A-Big Creek Bridge(west to east 6) (Steuben County, New York)
Built 1973; rehabilitated 2001
Beam bridge over Big Creek on CR 70A
Open to traffic

County U at Two Springs-Knapp Creek Bridge(Replacement) (Richland County, Wisconsin)
Built 1970
Slab bridge over Knapp Creek on Cth U
Open to traffic

Cow Castle Creek Boxcar Bridge (Orangeburg County, South Carolina)
Built 1975
Bridge over Cow Castle Creek on County Road
Doesn't show in NBI so may have been replaced

Cowee Creek Bridge (Juneau Borough, Alaska)
Built 1971
Stringer bridge over Cowee Creek on Glacier Highway
Open to traffic

Cox Bridge (Jackson County, Minnesota)
Built 1979. Previous bridge was a 6-panel Pratt through truss bridge with A-frame portal bracings and 45 heel strut bracings. Built in 1900
Steel stringer bridge over Des Moines River on Twp 131
Open to traffic

CP - NY787 Overpass (Albany County, New York)
Built 1971
Abandoned pony/through plate girder bridge over NY 787 on Canadian Pacific Railroad
Abandoned

CR 009 Bridge (Fergus County, Montana)
Built 1979; rehabilitated 2012
Steel stringer bridge over Wolf Creek 091 on CR 009
Open to traffic

CR 13 Bridge (McKinley County, New Mexico)
Built 1976
Pony truss bridge over an unnamed Waterway on CR 13 in Twin Lakes
Open to traffic

CR 130 - Scioto River Bridge (Hardin County, Ohio)
Built 1979
Modern pony truss bridge over Scioto River on CR 130
Open to traffic

CR 23 Bridge (McKinley County, New Mexico)
Built 1975
Pony truss bridge over Unnamed Waterway on CR 23
Open to traffic

CR 4 Bridge No. 1 (McKinley County, New Mexico)
Built 1977
Pony truss bridge over Big House Canyon on CR 4
Open to traffic

CR 4 Bridge No. 3 (McKinley County, New Mexico)
Built 1975
Pony truss bridge over an unnamed waterway on CR 4
Open to traffic

CR 792 Bridge (Stoddard County, Missouri)
Built or relocated here 1972; replaced 1998
Lost pony truss bridge over a drainage ditch on CR 792
Replaced by new bridge

CR71 Bridge (Tishomingo County, Mississippi)
Built 1970
Lost Timber stringer bridge over Redmont Railroad on Cr71
Demolished c. 2013 and replaced with grade crossing

Crab Hollow-Black Creek Bridge (Old) (Allegany County, New York)
Bridge
Replaced by a new bridge

Crawford Creek Bridge (Allegany County, New York)
Built 1970; rehabilitated 1992
Steel stringer bridge over Crawford Creek on Crawford Creek Road
Open to traffic

Crescent Beach Bridge (St. Johns County, Florida)
Built 1975
Bascule bridge over Matanzas River/ICW on FL 206
Open to traffic

Crescent Road Bridge (Belmont County, Ohio)
Built 1973
Pony truss bridge over Wheeling Creek on Crescent Road (CR 5)
Open to traffic

Crooked Creek Bridge (Cass County, Iowa)
Built 1977
Pony truss bridge over Crooked Creek on Crooked Creek Road
Open to traffic

Crooked Creek Bridge 1 (Lincoln County, Missouri)
Bridge over Crooked Creek on US 61 S
Open to traffic

Crooked River Bridge (Ray County, Missouri)
Built 1970; Replaced 2021
Lost Steel stringer bridge over Crooked River on Route J
Replaced by a new bridge

Cross Keys Road - Schuykill River (Replacement) (Berks County, Pennsylvania)
Stringer bridge over SCHUYLKILL RIVER on SR 4030 (LR 06043)
Open to traffic

CSAH 14 Bridge (Isanti County, Minnesota)
Built 1975; replacing a through truss bridge off alignment
Steel stringer bridge over Rum River on CSAH 14
Open to traffic

CSX - Charlton Street Overpass (Jefferson County, Kentucky)
Built 1974
Pony/through plate girder bridge over Charlton Street on Csx Railroad (formerly L&N railroad)
Open to traffic

CSX - Chattahoochee River Bridge (Houston County, Alabama)
Built 1974 to replace upstream swing bridge
Polygonal Warren through truss bridge over Chattahoochee River on CSX Railroad
Open to traffic

CSX - Cooper River Bridge (Berkeley County, South Carolina)
Built 1978
Warren through truss bridge over Cooper River on CSX RR
Open to traffic

CSX - Hilton Drawbridge (New Hanover County, North Carolina)
Built 1971
Warren through truss bridge over Northeast Cape Fear River on CSX Railroad
Open to traffic

CSX - Little River Bridge (Laurens County, South Carolina)
Built 1975
Deck plate girder bridge over Gordon Street & Little River on Railroad (CSX)
Open to traffic

CSX - Scott-Troy Road Overpass (St. Clair County, Illinois)
Built 1976, replacing an earlier railroad overpass.
Pony/through plate girder bridge over Scott-Troy Road on B&O Rr
Open to traffic

CSX - St. John Street Overpass (Spartanburg County, South Carolina)
Built 1973
Pony/through plate girder bridge over US 29 on Railroad (CSX)
Open to traffic

Curtis Creek Bridge (Baltimore, Maryland)
Built 1978; rehabilitated 2003
Bascule bridge over Curtis Creek on I-695 Inner Lanes in Baltimore
Open to traffic

Curtis Creek Bridge (Baltimore, Maryland)
Built 1974; rehabilitated 2003
Bascule bridge over Curtis Creek on IS 695 Outer Lanes in Baltimore
Open to traffic

Daniel Webster Hoan Memorial Bridge (Milwaukee County, Wisconsin)
Built 1974, Approach Span Failure Repaired 2001
Pair of steel through arch bridges over Milwaukee River on I-794 in Milwaukee
Open to traffic

Davids Creek Bridge (Audubon County, Iowa)
Built ca. 1970
Pony truss bridge over Davids Creek on Nighthawk Avenue
Open to traffic

DCAX - Zug Island Swing Bridge (Wayne County, Michigan)
Built 1976
Warren through truss bridge over River Rouge on Delray Connecting Railroad
Open to traffic, but rarely used.

Deal Island Road-Manokin River Bridge (Replacement) (Somerset County, Maryland)
Bridge
Open to traffic

Deer Creek Bridge (Henry County, Missouri)
Built 1978: Rehabilitated 2010
Steel stringer bridge over Deer Creek on Mo 7
Open to traffic

Deer Creek Bridge (Frontier County, Nebraska)
Built 1972
Pony truss bridge over Deer Creek on Coll 7290
Open to traffic

Deere Creek Arch Culvert (Scott County, Iowa)
Built 1977
Concrete arch bridge on East 53rd Street over Deere Creek
Open to traffic

Deering Road-Smith Creek Bridge (North Slope Borough, Alaska)
Built 1979
Steel stringer bridge over Smith Creek on Irr:Deering Road
Open to traffic

Dempsey Bridge (Cottonwood County, Minnesota)
Built 1979 replacing a pin connected Pratt through truss bridge with Howe Lattice portal bracings and 45 heel bracing built in 1908
Steel stringer bridge over Des Moines River on CR 14
Open to traffic

Dent Bridge (Clearwater County, Idaho)
Built 1971
Suspension bridge over North Fork Clearwater River on STC 4783
Open to traffic

Des Arc White River Bridge (Prairie County, Arkansas)
Built 1970
Steel through arch bridge over White River on State Highway 38
Open to traffic

Desmond Lake Road Bridge (Poinsett County, Arkansas)
Built 1974; rehabilitated 1990
Steel stringer bridge over Left Hand Chute of Little River on Desmond Lake Road
Open to traffic

Dewey M. Johnson Bridge (Jackson County, Florida)
Built 1978
Twin-span haunched deck plate girder bridge over Apalachicola River on Interstate 10
Open to traffic

Dibble Creek Bridge (Fayette County, Iowa)
Built 1971
Pony truss bridge over Dibble Creek on 306th Street
Open to traffic

Dibble Hill Road Bridge (Litchfield County, Connecticut)
Built 1970
Metal culvert over Mill Brook on Dibble Hill Road in Cornwall
Open to traffic

Disney Fort Wilderness Railroad - South Osceola Creek Bridge (Orange County, Florida)
Built 1973; Removed sometime after 1999
Lost Timber stringer bridge over South Osceola Creek on Fort Wilderness Railroad
Removed

Ditch No. 23 Bridge (Poinsett County, Arkansas)
Built 1972
Girder bridge over Ditch No. 23 on Sh 373
Temporarily closed due to hole in the deck

Division Street-St Joseph River Bridge (Replacement) (Elkhart County, Indiana)
Built 1970; rehabilitated 2005
Stringer bridge over St Joseph River on Division Street
Open to traffic

Donald Wilkinson Memorial Bridge (Essex County, Massachusetts)
Built 1973
Bascule bridge over Plum Island River on Plum Island Turnpike in Newbury
Open to traffic

Donora Monessen Bridge (Washington County, Pennsylvania)
Built 1972, rehabilitated 2009
Deck truss bridge over Monongahela River on PA 1077
Open to traffic

Double Trouble Road Bridge (Ocean County, New Jersey)
Built 1975
Timber stringer bridge over Cedar Creek on Double Trouble Road
Open to traffic

Doullut Canal Bridge (Plaquemines Parish, Louisiana)
Built 1975
Steel stringer bridge over Doullut Canal on La0023
Open to traffic

Drainage ditch #18 bridge (Humboldt County, Iowa)
Built 1970
Bridge over drainage ditch #18 on 130th Street (Humboldt CR C20)
Open to traffic

Drainage Ditch Bridge (Phillips County, Arkansas)
Built 1975
Timber stringer bridge over Drainage Ditch on Sh 316
Open to traffic

Dry Brook Road Over Dry Brook Scio NY (Allegany County, New York)
Stringer bridge over DRY BROOK on DRY BROOK ROAD
Open to traffic

Drywood Creek Bridge (Vernon County, Missouri)
Built 1970; rehabilitated 1984
Girder bridge over Drywood Creek on CR 695 (Yater Road)
Open to traffic

Duplantis Bridge (Terrebonne Parish, Louisiana)
Built 1973
Vertical lift bridge over Petit Caillou Bayou on Klondyke Road
Open to traffic

Durnam Road Bridge (Gallatin County, Montana)
Built 1970
Pony truss bridge over Gallatin River on Durnam Road
Open to traffic

E 1st Ave Bridge (Navarro County, Texas)
Built 1975
Timber stringer bridge over E 1st Ave on BNSF RR
Open to traffic

E Jefferson Street Bridge (Pedestrian) (Onondaga County, New York)
Built 1970
Pony truss bridge over E Jefferson Street on Foot Bridge
Unknown status

E.J. "Lionel" Grizzaffi Bridge (St. Mary Parish, Louisiana)
Built 1975, Opened April 12, 1977
Through truss bridge over Atchafalaya River on US 90 between Berwick and Morgan City
Open to traffic

E.L. Patton Yukon River Bridge (Yukon-Koyukuk Census Area, Alaska)
Built 1975
Bridge over Yukon River on Dalton Highway
Open to traffic

East 102 River Bridge (Taylor County, Iowa)
Built 1971; rehabilitated 1990
Through truss bridge over East 102 River on 235th Street
Open to traffic

East Biscayne Bay Bridge (Miami-Dade County, Florida)
Built 1973
Pair of bascule bridges over East Biscayne Bay on FL 934 in Miami Beach
Open to traffic

East Branch Rock Creek Bridge (Somerset County, Maryland)
Built 1976
Wooden bridge over East Branch of Rock Creek on MD 363
Open to traffic

East Cherry Street Bridge (Lincoln County, Missouri)
Bridge over US Hwy 61 on East Cherry Street
Open to traffic

East Fork East Nodaway River Bridge (Adams County, Iowa)
Built 1974
Pony truss bridge over East Fork East Nodaway River on Xavier Avenue
Open to traffic

East Nishnabotna River Bridge (Audubon County, Iowa)
Built 1971
Pony truss bridge over E Nishnabotna River on 110th Street
Open to traffic

East Nishnabotna River Bridge (130th Street) (Audubon County, Iowa)
Built or relocated 1971
Pony truss bridge over East Nishnabotna River on 130th Street
Open to traffic

East Nishnabotna River Bridge (140th Street) (Audubon County, Iowa)
Built or relocated 1971
Pony truss bridge over East Nishnabotna River on 140th Street
Open to traffic

East Nishnabotna River Tributary Bridge (Audubon County, Iowa)
Built 1971
Timber stringer bridge over East Nishnabotna River on 140th Street
Open to traffic

East Nodaway River Bridge (Adams County, Iowa)
Built or relocated here 1976
Pony truss bridge over East Nodaway River on Tulip Avenue
Open to traffic

East Nodaway River Bridge (Adams County, Iowa)
Built or relocated here 1977
Pony truss bridge over East Nodaway River on 190th Street
Open to traffic

East Portage Avenue Bridge (Chippewa County, Michigan)
Built 1970; rehabilitated 1988
Steel through arch bridge over Power Canal on East Portage Ave. in Sault Ste. Marie
Open to traffic

East River Bridge (Taylor County, Iowa)
Built 1977
Pony truss bridge over East River on 160th Street
Open to traffic

East River Mountain Tunnel (Bland County, Virginia)
Built 1974
Tunnel under East River Mountain on I-77
Open to traffic

East Valley Road Over East Valley Creek At Fischer RD (Allegany County, New York)
Slab bridge over EAST VALLEY CREEK on EAST VALLEY ROAD
Open to traffic

Ed Hendler Bridge (Benton County, Washington)
Built 1978
Cable-stayed bridge over Columbia River on WA 397 in Kennewick
Open to traffic

Eight Mile Creek Bridge (Butler County, Kansas)
Built 1974
Pony truss bridge over Eight Mile Creek, 1.8 mi. west and 2.0 mi. south of Douglass
Open to traffic

Eisenhower Tunnel (Summit County, Colorado)
Constructed started March 15, 1968; tunnel opened March 8, 1973
Tunnel on I-70 Westbound at Loveland Pass
Open to traffic

Electric Bridge (Shelby County, Indiana)
Built 1974
Concrete stringer bridge over Little Blue River on Short Blue Road
Open to traffic

Elkhorn Creek Bridge (Audubon County, Iowa)
Built 1973
Pony truss bridge over Elkhorn Creek on 280th Street
Don't know

Ellender Bridge (Calcasieu Parish, Louisiana)
Built 1977
Vertical lift bridge over the Intracoastal Waterway on LA 27
Open to traffic

Elwha River Bridge (Clallam County, Washington)
Built 1972
Concrete arch bridge over Elwha River on WA 112
Open to traffic

Empire State Plaza Arches (Albany County, New York)
Complex was built 1965-1976, offical opening 1973
Closed-spandrel arch bridge over S Mall Arterial/Lancaster St on Empire State Plaza/ The Egg/ Ice Rink
Open to traffic

Endom Bridge (Ouachita Parish, Louisiana)
Built 1978; Repalced 2003
Swing bridge over Ouachita River on LA 3280 in Monroe
Replaced by a new bridge

Erie Avenue -Canacadea Creek Bridge (Allegany County, New York)
Stringer bridge over CANACADEA CREEK on ERIE AVENUE
Open to traffic

Estherwood Bridge (Acadia Parish, Louisiana)
Built 1975
Pontoon bridge over Bayou Plaquemine Brule on LA 91 at Estherwood
Open to traffic