Longest Bridges in Louisiana

The longest bridge in Louisiana spans 127269.0 feet. The table below ranks the state's bridges by total structure length — from major river crossings and causeway spans to long highway overpasses.

How this ranking works

Length comes from the NBI structure length field and is shown in feet. It is best read as a scale and maintenance-complexity signal, not by itself as a safety signal.

Bridge	County	Length	Condition	Year Built
Cswy Bridge N. B. over Lake Pontchartrain	St. Tammany	127269.0 ft	Fair	1965
Causeway SB over Lake Pontchartrain	St. Tammany	127200.1 ft	Fair	1956
I0055 over I-10 & US 51 & Swamp	St. John the Baptist	76713.9 ft	Good	1975
I0055 over US 51 & Swamp	St. John the Baptist	75831.0 ft	Fair	1975
I0010 over Bonnet Carre Spillway	St. Charles	50814.0 ft	Fair	1972
I0010 over Bonnet Carre Spillway	St. Charles	50772.0 ft	Fair	1972
I0055 over Elevated Rdwy	Tangipahoa	42125.0 ft	Fair	1979
I0055 over Manchac Int/service RD	Tangipahoa	42125.0 ft	Good	1979
I0010 over La975 E Floodway La3000	Iberville	41996.1 ft	Fair	1972
I0010 over East Floodway	Iberville	41996.1 ft	Fair	1972
Us0090 over Drain Canals La.20 Rr	Terrebonne	29544.0 ft	Fair	1995
Us0090 over Drainage Canals La.20 Rr	Terrebonne	29544.0 ft	Fair	1995
I0010 over Lake Ponchartrain	Orleans	29202.1 ft	Good	2011
I0010 over Lake Ponchartrain	Orleans	29188.0 ft	Fair	2011
La3235 over Wetlands	Lafourche	29040.0 ft	Fair	2012
Us0090-b over Harvey Canal/sts/rr	Jefferson	29032.2 ft	Fair	1987
Us0090-b over Harvey Canal/sts/rr	Jefferson	29030.8 ft	Fair	1987
I0310 over US 61/rr/swamp/la 626	St. Charles	25754.9 ft	Fair	1992
I0310 over US 61/rr/swamp/la 626	St. Charles	25671.9 ft	Fair	1992
Us0011 over Lake Pontchartrain	Orleans	24921.9 ft	Poor	1938
I0010 over W Atchafalaya Floodway	St. Martin	23440.0 ft	Fair	1971
I0010 over W Atchafalaya Floodway	St. Martin	23440.0 ft	Fair	1971
I0010 over E Atchafalaya Floodway	St. Martin	21585.0 ft	Fair	1972
I0010 over E Atchafalaya Floodway	St. Martin	21585.0 ft	Fair	1972
I0010 over City Streets	Orleans	19772.0 ft	Fair	1969
Us0190 over Morganza Fldwy	Pointe Coupee	18777.9 ft	Fair	1945
I0010 over Reserve Relief Canal	St. John the Baptist	18731.0 ft	Fair	1974
I0010 over Reserve Relief Canal	St. John the Baptist	18731.0 ft	Good	1974
I0010 over City Streets	Orleans	18246.1 ft	Fair	1969
Us0090 over La 182/la70/loc/drainage	St. Mary	14161.1 ft	Fair	1977
La0006 over Toledo Bend Res.	Sabine	13195.9 ft	Fair	1967
Us0090 over Alligator Bayou	Assumption	12079.1 ft	Fair	1998
Us0090 over B.caroline & B.alligator	Assumption	12074.1 ft	Fair	1998
I0010 over US 51 & Swamps	St. John the Baptist	11753.0 ft	Fair	1972
I0010 over US 51 & Swamps	St. John the Baptist	11715.9 ft	Good	1972
I0110 over City Streets	East Baton Rouge	11548.9 ft	Fair	1970
I0110 over City Streets	East Baton Rouge	11536.1 ft	Fair	1969
I0610 over City Streets	Orleans	11342.8 ft	Fair	1975
I0020 over Mississippi River	Madison	11051.8 ft	Fair	1973
I0049 over Hwys Strts Rr Bayou	Rapides	10503.9 ft	Fair	1994
I0049 over Hwys Strts Rr Bayou	Rapides	10487.9 ft	Fair	1995
I0220 over Cross Lake Kcs Csr La 17	Caddo	10230.0 ft	Fair	1988
La0001 over Bayou Lafourche	Lafourche	10215.9 ft	Good	2009
I0020 over City St/icg Rr/ouachita	Ouachita	9154.9 ft	Fair	1965
I0020 over City St/icg Rr/ouachita	Ouachita	9154.9 ft	Fair	1965
La0070 over Mississippi River	St. James	9102.0 ft	Fair	1963
I0210 over Prien Lake	Calcasieu	8500.0 ft	Fair	1964
Us0090 over Bayou Ramos	St. Mary	8369.1 ft	Poor	1994
Us0090 over Bayou Ramos	St. Mary	8349.1 ft	Poor	1994
La0154 over Lake Bistineau	Bossier	7839.9 ft	Fair	2003
Us0090 over Deadwood RD Tiger Bayou	Terrebonne	7703.1 ft	Fair	1994
Us0090 over Deadwood RD Tiger Bayou	Terrebonne	7632.9 ft	Good	1994
I0610 over City Streets	Orleans	7446.9 ft	Good	1975
La0010 over Mississippi River	West Feliciana	6779.9 ft	Good	2011
I0010 over Inner Harbor /city Sts	Orleans	6714.9 ft	Fair	1966
La0047 over I C Waterway(gulf Outlet	Orleans	6622.0 ft	Fair	1967
I0010 over Calcasieu River Rr Sts	Calcasieu	6617.1 ft	Poor	1952
Us0090-b over City Streets	Orleans	6201.1 ft	Fair	1995
I0110 over La 408; Badley St; Park	East Baton Rouge	6085.0 ft	Fair	1982
I0110 over La 408; Badley St; Park	East Baton Rouge	6085.0 ft	Good	1982
Us0061 over Bonnet Carre Spillway	St. Charles	6005.9 ft	Fair	1984
Us0061 over Bonnet Carre	St. Charles	6005.9 ft	Fair	1935
I0310 over Ramps/rr/canal/us 61	St. Charles	6000.0 ft	Fair	1992
Us0190 over Mississippi River	East Baton Rouge	5878.9 ft	Poor	1939
Us0171 over Calcasieu River	Calcasieu	5702.1 ft	Fair	1969
Us0090-b over City Sts.us.90bn/b Rmps	Orleans	5596.1 ft	Good	1996
I0310 over Ramps/us 61	St. Charles	5575.1 ft	Fair	1992
La0319 over Intracoastal Canal	St. Mary	5513.1 ft	Fair	2005
Us0090 over Bayou Boeuf	Assumption	5414.0 ft	Fair	1998
La3052 over La 20 Sp Rr Drain Cana	Terrebonne	5252.0 ft	Fair	1994
Us0090 over La 18 And 541	Jefferson	5162.1 ft	Good	2013
Us0090 over La 18 And 541	Jefferson	5162.1 ft	Good	2013
I0310 over Icg.rr Ramp E F &h La4	St. Charles	5145.0 ft	Fair	1983
Us0090 over Rigolets Pass	Orleans	5094.2 ft	Good	2008
La0407 over (new)algiers Cutoff Cana	Orleans	5082.0 ft	Fair	1985
Us0090-b over City Streets	Orleans	5038.1 ft	Fair	1957
I0010 over I-10 Serv Rds B. Sab R	Calcasieu	5006.9 ft	Fair	2002
I0010 over Sabine River	Calcasieu	5006.9 ft	Fair	2002
I0010 over East Pearl River	St. Tammany	4986.9 ft	Fair	1966
Us0090-b over R/r City Sts	Orleans	4897.0 ft	Fair	1960
I0310 over I-10/I-310/SWAMP	St. Charles	4815.0 ft	Good	1992
I0310 over I-10	St. Charles	4753.0 ft	Good	1992
I0510 over City Streets	Orleans	4751.0 ft	Fair	1992
La0009 over Black Lake	Natchitoches	4724.1 ft	Good	2010
Us0090 over La 48 And La 611-1	Jefferson	4706.0 ft	Good	2013
I0010 over City Streets	Orleans	4678.1 ft	Fair	1960
Us0090 over La 48 And 611-1	Jefferson	4666.0 ft	Good	2013
La3134 over La45;la303;icww	Jefferson	4624.0 ft	Fair	1976
La0002 over Ouachita Sterlington	Ouachita	4560.0 ft	Fair	2009
I0010 over Mississippi River	East Baton Rouge	4549.9 ft	Fair	1968
I0010 over Airline HWY US 61	Orleans	4520.0 ft	Fair	1977
Us0090-b over R/r City Sts	Orleans	4481.0 ft	Fair	1960
I0010 over City Streets /rr	Orleans	4436.0 ft	Fair	1960
I0510 over City Streets	Orleans	4323.2 ft	Fair	1992
La0027 over Intracoastal Waterway	Cameron	4244.1 ft	Fair	1976
Us0090-b over La.428 And City Streets	Orleans	4238.8 ft	Fair	1995
Us0065 over Mississippi River	Concordia	4205.1 ft	Fair	1940
Us0065 over Mississippi River	Concordia	4202.1 ft	Fair	1989
La3087 over Intracoastal Ww	Terrebonne	4196.9 ft	Fair	1980
Us0071 over La 1 Fr. Road Up Rr	Rapides	4152.9 ft	Good	1996
Us0071 over La 1 Frontage Rd. Up R	Rapides	4152.9 ft	Fair	1994
La0001 over Morganza Spillway	Pointe Coupee	4125.0 ft	Fair	1954
I0310 over Ramps/rr/canal/us 61	St. Charles	4098.1 ft	Fair	1992
I0049 over I-49 US 167 Ramps Cit	Rapides	4067.9 ft	Fair	1994
La0023 over Doullut Canal	Plaquemines	4055.1 ft	Fair	1975
Us0090-b over City Streets	Orleans	3998.0 ft	Good	1994
I0049 over City Sts/kcs Rr	Caddo	3985.9 ft	Fair	1991
I0049 over City Sts/kcs Rr	Caddo	3985.9 ft	Fair	1991
Us0190 over Atchafalaya Floodway	St. Landry	3983.9 ft	Fair	1961
Us0190 over Atchafalaya Fldwy	St. Landry	3983.9 ft	Poor	1961
La0001 over Atchafalaya River	Avoyelles	3957.0 ft	Fair	1971
La0001 over Marsh	Lafourche	3957.0 ft	Good	2009
La0010 over Railroad	Pointe Coupee	3874.0 ft	Fair	2010
I0110 over US 61b & La 73	East Baton Rouge	3836.0 ft	Fair	1963
La0001 over Caminada Bay	Jefferson	3806.1 ft	Good	2012
La0082 over Intracoastal Waterway	Vermilion	3794.9 ft	Fair	1976
La0107 over Red River	Avoyelles	3779.9 ft	Good	2000
La0082 over Sabine Lake	Cameron	3774.9 ft	Fair	2010
La0182 over Atchaf.r/berwick Bay	St. Mary	3746.1 ft	Poor	1933
La0317 over Icww @ Bayou Sale	St. Mary	3725.1 ft	Fair	1982
Us0090 over City Sts I10 Ramps Us9	Orleans	3667.0 ft	Fair	1994
I0010 over I-10	Jefferson	3664.0 ft	Good	2012
La0182 over Bayou Beouf	Assumption	3654.9 ft	Poor	1958
La0022 over Tickfaw River	Livingston	3654.9 ft	Good	2000
I0110 over US 61b & La73	East Baton Rouge	3643.0 ft	Fair	1963
La0014 over Mermentau River	Vermilion	3616.1 ft	Fair	1976
La0308 over La657-icww-str@larose	Lafourche	3589.9 ft	Good	1975
I0020 over Ramp I-20	Caddo	3561.0 ft	Fair	1985
I0310 over Ramps/us 61	St. Charles	3543.0 ft	Fair	1992
La0015 over Old River Overbank C.s.	Concordia	3505.9 ft	Poor	1959
Us0090 over City Streets	Orleans	3455.1 ft	Fair	1956
Us0090 over City Streets	Orleans	3455.1 ft	Fair	1960
I0049 over US 79 & 80 I-20 & Kcs R	Caddo	3437.0 ft	Good	1993
I0049 over Us79-80 I20 & Rrs	Caddo	3437.0 ft	Good	1993
Us0190 over Atchafalaya R @ Kspngs	St. Landry	3435.0 ft	Fair	1988
Us0190 over Atchafalaya R @ Kspngs	St. Landry	3402.9 ft	Fair	1973
La 23 over Intercoastal Waterway	Plaquemines	3401.9 ft	Good	2024
Us0090 over La308 B.lafourche La1	Lafourche	3331.0 ft	Good	1976
I0220 over Red River/la 3049/538	Bossier	3301.8 ft	Fair	1977
I0049 over I-220	Caddo	3299.9 ft	Good	2018
I0310 over La 3127 & I-310	St. Charles	3299.9 ft	Fair	1986
La0008 over Ouachita River	Catahoula	3274.9 ft	Fair	2017
Us0090 over Ind Cl/france Rd/n.o. Rr	Orleans	3270.0 ft	Fair	1989
La0024 over Intracoastal Waterway	Terrebonne	3270.0 ft	Good	1996
Us0090 over Franklin Canal	St. Mary	3264.1 ft	Fair	1979
La0001 over Marsh	Lafourche	3232.9 ft	Good	2009
Us0090 over La1 B.lafourche La 308	Lafourche	3231.0 ft	Good	1976
La0024 over Intracoastal Waterway	Terrebonne	3230.0 ft	Good	1996
La0010 over Pearl River	Washington	3222.1 ft	Good	1998
I0110 over La 67-plank RD	East Baton Rouge	3204.1 ft	Fair	1968
Us0084 over Black River	Concordia	3203.1 ft	Fair	2009
Us0090 over Franklin Canal	St. Mary	3196.9 ft	Fair	1979
La0010 over Mississippi River	West Feliciana	3185.0 ft	Good	2011
I0310 over Ground	St. Charles	3180.1 ft	Good	1992
I0020 over I-20 Ramp W-s Mkt St.	Caddo	3175.9 ft	Fair	1985
Us0090-b over La 428/us 90b/ramps/sts	Orleans	3164.0 ft	Good	1989
I0110 over La 67-plank RD	East Baton Rouge	3115.2 ft	Fair	1968
La0002 over Red River-millers Bluff	Bossier	3100.1 ft	Poor	1955
I0049 over I-220	Caddo	3069.9 ft	Good	2018
I0010 over La 427-acadian Tw/kcs Rr	East Baton Rouge	3067.9 ft	Fair	1964
I0010 over La 427-acadian Tw/kcs Rr	East Baton Rouge	3067.9 ft	Fair	1964
La0008 over Red River La 1 Up Rr	Grant	3066.9 ft	Fair	1984
I0055 over Pass Manchac	Tangipahoa	3051.8 ft	Fair	1977
I0055 over Pass Manchac	Tangipahoa	3051.8 ft	Fair	1977
I0010 over Atchafalaya River	St. Martin	3040.0 ft	Fair	1972
Us0090-b over Mississippi River	Orleans	3019.0 ft	Fair	1957
Us0090-b over Mississippi River	Orleans	3019.0 ft	Poor	1985
Us0071 over Red River Fort Buhlow	Rapides	3015.1 ft	Good	2015
Old US 51 over Pass Manchac	Tangipahoa	3012.1 ft	Poor	1957
La3213 over Mississippi River	St. James	3009.8 ft	Fair	1989
Us0071 over Red River Fort Buhlow	Rapides	3004.9 ft	Good	2016
Us0080 over Red River @ Texas St.	Bossier	2982.0 ft	Fair	1934
I-10 over Loyola DR	Jefferson	2979.0 ft	Good	2023
I0010 over La 49; Intgs	Jefferson	2960.0 ft	Fair	2001
Us0090 over Charenton Canal/frontage	St. Mary	2923.9 ft	Fair	1978
Us0090 over Charenton Canal	St. Mary	2923.9 ft	Fair	1978
I0510 over Rr/us 90(chef Hwy)	Orleans	2918.0 ft	Good	1992
La0027 over Icww - Ellenders	Calcasieu	2903.9 ft	Fair	1977
Us0190 over Amite River	Livingston	2899.9 ft	Good	2009
Us0190 over Amite River	Livingston	2899.9 ft	Good	2010
I0010 over Veterans BLVD Off Ramp	Jefferson	2893.0 ft	Good	2011
I0010 over Ramp To Moisant Airport	Jefferson	2867.1 ft	Fair	1979
La0511 over Red R. C.fant PKWY Ar Te	Bossier	2823.2 ft	Poor	1968
I0310 over Mississippi River	St. Charles	2745.1 ft	Fair	1983
La3032 over Red River Fant&teague Pk	Caddo	2733.9 ft	Fair	2008
Us0090 over Little B Black/la 311/sp	Terrebonne	2721.1 ft	Fair	1987
Us0090 over Little B Black/la 311/sp	Terrebonne	2721.1 ft	Good	1987
I0010 over Whiskey Bay Channel	Iberville	2707.0 ft	Fair	1972
La3032 over Red River Fant/parkway	Caddo	2691.9 ft	Fair	1972
I0010 over Washington Street	East Baton Rouge	2690.9 ft	Fair	1963
Us0084 over Red River	Red River	2682.1 ft	Fair	1990
I0010 over La 30 & City Streets	East Baton Rouge	2681.1 ft	Fair	1967
Lapalco BLVD over Harvey Canal	Jefferson	2660.1 ft	Fair	1972
I0059 over West Pearl River	St. Tammany	2645.0 ft	Fair	1997
I0059 over West Pearl River	St. Tammany	2645.0 ft	Fair	1996
I0010 over Vet Mem HWY	Jefferson	2620.1 ft	Poor	1967
I0510 over Rr/us 90(chef Hwy)	Orleans	2618.1 ft	Good	1992
I0012 over Amite River	Livingston	2615.2 ft	Good	2012
I0012 over Amite River	Livingston	2615.2 ft	Good	2011
Us0090 over Sp. Rr. & City Strs.	Orleans	2615.2 ft	Fair	1988