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Louisiana bridge conditions

12,684 inventoried bridges · 1,423 rated poor · county by county

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

1,423 of Louisiana's 12,684 inventoried bridges are rated in poor condition (11.2%) in the 2025 National Bridge Inventory, as of August 20, 2026.
4,802 bridges (37.9%) are rated good and 6,459 (50.9%) fair.
The national poor rate is about 6.7%; Louisiana is above it (see all states ranked).
The busiest poor-rated bridge in the state is Us0090-b over Mississippi River in Orleans Parish, carrying about 154,311 vehicles a day.

The worst bridge in Louisiana?

By the measure that matters most - the most traffic on a poor rating - it is Us0090-b over Mississippi River in Orleans Parish, built 1985, carrying about 154,311 vehicles a day. That is a repair-priority flag, not a collapse warning: what a poor rating does and does not mean. See the worst bridge in every state.

Good 37.9% · Fair 50.9% · Poor 11.2% of 12,684 bridges

Bridge conditions by county

Sorted by the number of poor-rated bridges. Click any county for its full bridge list.

County	Bridges	Rated poor	Poor %
East Baton Rouge Parish	549	103	18.8%
Tangipahoa Parish	477	59	12.4%
Bienville Parish	190	53	27.9%
Webster Parish	194	48	24.7%
Natchitoches Parish	320	46	14.4%
Caddo Parish	683	45	6.6%
Jefferson Davis Parish	242	45	18.6%
Ouachita Parish	331	42	12.7%
Orleans Parish	381	41	10.8%
Bossier Parish	269	41	15.2%
Calcasieu Parish	462	39	8.4%
Winn Parish	220	38	17.3%
Rapides Parish	524	34	6.5%
Claiborne Parish	148	33	22.3%
East Feliciana Parish	131	31	23.7%
Grant Parish	209	30	14.4%
Washington Parish	285	29	10.2%
St. Landry Parish	316	28	8.9%
Vernon Parish	337	28	8.3%
Avoyelles Parish	150	26	17.3%
Vermilion Parish	260	26	10.0%
Ascension Parish	216	26	12.0%
Lafayette Parish	319	25	7.8%
Acadia Parish	280	23	8.2%
Beauregard Parish	221	23	10.4%
Terrebonne Parish	214	22	10.3%
Lincoln Parish	171	22	12.9%
Allen Parish	178	22	12.4%
Sabine Parish	195	22	11.3%
Lafourche Parish	130	20	15.4%
Richland Parish	204	20	9.8%
Morehouse Parish	136	19	14.0%
Livingston Parish	251	19	7.6%
West Feliciana Parish	108	18	16.7%
St. Tammany Parish	361	18	5.0%
Jefferson Parish	381	16	4.2%
Red River Parish	61	16	26.2%
Iberia Parish	142	15	10.6%
De Soto Parish	201	15	7.5%
Cameron Parish	58	14	24.1%
Union Parish	121	13	10.7%
Jackson Parish	163	13	8.0%
Caldwell Parish	124	12	9.7%
LaSalle Parish	195	12	6.2%
St. Helena Parish	139	12	8.6%
Pointe Coupee Parish	51	11	21.6%
St. Martin Parish	117	10	8.5%
Evangeline Parish	155	10	6.5%
Iberville Parish	80	10	12.5%
West Baton Rouge Parish	72	10	13.9%
St. Mary Parish	124	9	7.3%
East Carroll Parish	55	9	16.4%
Assumption Parish	68	9	13.2%
Plaquemines Parish	35	7	20.0%
Madison Parish	104	7	6.7%
West Carroll Parish	88	6	6.8%
Concordia Parish	42	6	14.3%
Franklin Parish	130	5	3.8%
Catahoula Parish	69	4	5.8%
St. Bernard Parish	47	3	6.4%
Tensas Parish	52	2	3.8%
St. Charles Parish	82	1	1.2%
St. James Parish	26	1	3.8%
St. John the Baptist Parish	40	1	2.5%

The 25 busiest poor-rated bridges in Louisiana

Bridge	County	Built	Vehicles/day	Condition
Us0090-b over Mississippi River	Orleans Parish, LA	1985	154,311	Poor
I0010 over Service Rd & Upt R/R	Orleans Parish, LA	1960	154,311	Poor
I0010 over Vet Mem Hwy	Jefferson Parish, LA	1967	137,542	Poor
I0020 over M.p. RR	Caddo Parish, LA	1965	98,318	Poor
I0020 over M.p. RR	Caddo Parish, LA	1965	98,318	Poor
I0020 over Lk Shore Dr&kesrr	Caddo Parish, LA	1965	98,318	Poor
I0020 over Lk Shore Dr&kcsrr	Caddo Parish, LA	1965	98,318	Poor
I0020 over Marshall St/la 1/RRS.	Caddo Parish, LA	1965	98,318	Poor
I0020 over on Ramp to I-20 Wbl	Caddo Parish, LA	1980	87,567	Poor
I0020 over I-20 Ramp W-n I-20 Mkt S	Caddo Parish, LA	1985	87,567	Poor
I0020 over Marshall St&la&kci-20	Caddo Parish, LA	1965	87,567	Poor
I0010 over Sabine Relief	Calcasieu Parish, LA	1954	86,969	Poor
I0010 over Calcasieu River RR Sts	Calcasieu Parish, LA	1952	86,600	Poor
I0020 over St. Louis & SW RR	Caddo Parish, LA	1965	84,672	Poor
I0010 over La 385	Calcasieu Parish, LA	1961	73,488	Poor
I0020 over Stl&sw-kcs Rr/westerfiel	Bossier Parish, LA	1966	69,892	Poor
I0010 over I0049/US0167	Lafayette Parish, LA	1968	56,748	Poor
LA3046 over R/R City Streets La 611	Jefferson Parish, LA	1957	55,994	Poor
I0020 over Creek	Lincoln Parish, LA	1963	50,895	Poor
I0010 over I-610 & I-10	Orleans Parish, LA	1963	49,634	Poor
LA0039 over Inner Harbor Nav Canal	Orleans Parish, LA	1957	47,739	Poor
LA0039 over RR Canal	St. Bernard Parish, LA	1991	47,739	Poor
Palmetto St OnRamp over Kcs RR	Orleans Parish, LA	1960	47,738	Poor
I0020 over Stl&sw-kcs Rr/westerfiel	Bossier Parish, LA	1966	45,300	Poor
US0190 over Creek	East Baton Rouge Parish, LA	1960	44,391	Poor

Frequently asked questions

How many bridges in Louisiana are in poor condition?

1,423 of Louisiana's 12,684 inventoried highway bridges are rated in poor condition (11.2%) in the 2025 National Bridge Inventory. 'Poor' is FHWA's classification for a bridge whose deck, superstructure, or substructure is rated 4 or lower on the 0-9 scale; it was formerly called 'structurally deficient'.

Are the poor-rated bridges in Louisiana safe to drive on?

A poor rating flags advanced deterioration that needs repair or close monitoring; it does not by itself mean a bridge is unsafe. Bridges judged unsafe are closed or restricted to lighter loads by the owner. Inspections continue on all open bridges, generally at least every 24 months under the National Bridge Inspection Standards.

Source: FHWA National Bridge Inventory, 2025 vintage, reported by the Louisiana DOT.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.