Total bridges
477
Public highway bridges in Tangipahoa County
County profile · official public datasets
Tangipahoa County, LA
477 public highway bridges tracked in the FHWA National Bridge Inventory: 40.7% rated Good, 45.9% Fair, 13.4% Poor.
- 477
- Public bridges
- 40.7%
- Good condition
- 13.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Tangipahoa County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 43rd
- of 64 on Poor share
- 13.4%
- Poor-condition share
- 477
- public highway bridges
- 1977
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Tangipahoa County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Tangipahoa County ranks #43 of 64 Louisiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 13.4%). Tangipahoa County, Louisiana contains 477 public highway bridges. Roughly 40.7% are rated “Good,” 45.9% “Fair,” and 13.4% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.
Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.
Source: FHWA National Bridge Inventory. See methodology for full definitions.
Good condition
40.7%
194 of 477 rated 7-9
Fair condition
45.9%
219 of 477 rated 5-6
Poor condition
13.4%
64 of 477 rated 4 or below
In-state Poor-share rank
#43 of 64
Among Louisiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 477 NBI-tracked bridges by lowest applicable component rating.
Good 40.7% (194)
Fair 45.9% (219)
Poor 13.4% (64)
Tangipahoa County's Poor-condition bridges carry 103,867 vehicle crossings a day
That is 3% of the county's reported daily bridge traffic on 13.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,623 crossings a day against 7,438 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 477 of 477 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
49.7% of Tangipahoa County's bridges have passed the 50-year mark
237 of the 477 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 40.7% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 15.6% of the county's Poor-condition bridge traffic
US0051 over YELLOW WATER RIVER, built 1953, carries 16,234 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 64-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 103,867 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Tangipahoa County's bridges were built
477 bridges with a recorded construction year, grouped by decade
- 1930s 17
1930–1939
17 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s
1950–1959
71 bridges
- 1960s
1960–1969
98 bridges
- 1970s
1970–1979
124 bridges
- 1980s 26
1980–1989
26 bridges
- 1990s
1990–1999
61 bridges
- 2000s 37
2000–2009
37 bridges
- 2010s 35
2010–2019
35 bridges
- 2020s 7
2020–2029
7 bridges
What this shows Construction peaked in the 1970s, when 124 of the county's bridges still in the inventory were built, which is 26% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1977, 5 years older than the Louisiana average of 1982.
How Tangipahoa County compares with Louisiana's closest counties by inventory size
The 5 Louisiana counties nearest Tangipahoa County in number of bridges, with their condition splits. Its 13.4% Poor share is the 5th-lowest of these 6. Its average build year of 1977 against a peer-group mean of 1982 is 5 years older.
Showing the 5 closest of 63 Louisiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| East Baton Rouge County | 548 | 41.8% | 38.5% | 19.7% | 1980 |
| Rapides County | 523 | 53.3% | 39.6% | 7.1% | 1987 |
| Tangipahoa County (this page) | 477 | 40.7% | 45.9% | 13.4% | 1977 |
| Calcasieu County | 463 | 19% | 73% | 8% | 1983 |
| Orleans County | 382 | 43.7% | 46.3% | 9.9% | 1976 |
| Jefferson County | 379 | 58.6% | 36.9% | 4.5% | 1984 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Tangipahoa County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Tangipahoa County, both outside Louisiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside LA (477 bridges here).
- Kiowa County, OK · 477 bridges
- Johnson County, MO · 476 bridges
- Grant County, OK · 476 bridges
- Providence County, RI · 476 bridges
Similar average build year
Nearest mean year-built outside LA (1977 here).
- San Diego County, CA · avg 1977 · 1,632 bridges
- King County, WA · avg 1977 · 1,238 bridges
- Riverside County, CA · avg 1977 · 1,117 bridges
- Shelby County, TN · avg 1977 · 1,077 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (477)
LA0022
FairOver: DRAIN
3.7 M E OF US 51, Tangipahoa, LA
Built 1938 Load: 25.4 t ADT: 12,900
LA0038
FairOver: LITTLE SILVER CR
4.3 M E OF LA 1061, Tangipahoa, LA
Built 1961 Load: 25.4 t ADT: 1,648
LA0442
FairOver: NATALBANY RIVER
LA0442, Tangipahoa, LA
Built 1963 Load: 25.4 t ADT: 5,026
US0190
FairOver: YELLOW WATER RIVER
US0190, Tangipahoa, LA
Built 1969 Load: 25.6 t ADT: 14,856
Firetower Rd
FairOver: CEDAR CREEK
2.30 M S of US 190, Tangipahoa, LA
Built 2001 Load: 25.9 t ADT: 1,160
LA0022
FairOver: DRAIN
0.2 M E OF LA 445, Tangipahoa, LA
Built 1938 Load: 26.3 t ADT: 6,775
LA1050
FairOver: BEAVER CREEK
0.65 MILES NORTH OF LA 44, Tangipahoa, LA
Built 1960 Load: 26.3 t ADT: 1,583
US0190
FairOver: DRAIN
0.9 M W OF I-55, Tangipahoa, LA
Built 1932 Load: 26.9 t ADT: 14,856
LA0022
FairOver: SELSERS CREEK
1.9 M E OF E JCT. US 51B, Tangipahoa, LA
Built 1938 Load: 27.2 t ADT: 12,900
LA0022
FairOver: DRAIN
1.4 M W OF LA 445, Tangipahoa, LA
Built 1939 Load: 27.2 t ADT: 6,435
LA0022
FairOver: DRAIN
1.3 M W OF LA 445, Tangipahoa, LA
Built 1939 Load: 27.2 t ADT: 6,435
LA0440
FairOver: BIG CREEK
LA0440, Tangipahoa, LA
Built 1960 Load: 27.2 t ADT: 752
Firetower Rd
FairOver: MILE BRANCH
3.3 MI N/E JCT. 445 & 22, Tangipahoa, LA
Built 1999 Load: 27.2 t ADT: 1,844
Harvey Lavigne Rd
FairOver: SIMS CREEK
2.8 MI N OF JCT LA495 &22, Tangipahoa, LA
Built 2001 Load: 27.2 t ADT: 992
I0055
FairOver: BEAVER CREEK
I0055, Tangipahoa, LA
Built 1966 Load: 28.8 t ADT: 17,665
LA1057
FairOver: BIG CREEK
LA1057, Tangipahoa, LA
Built 1967 Load: 29.0 t ADT: 1,539
I0055
FairOver: TERRYS CREEK
2 Miles North of LA 38, Tangipahoa, LA
Built 1966 Load: 30.1 t ADT: 21,762
I0055
FairOver: TERRYS CREEK
2.5 Mi S. of State Line, Tangipahoa, LA
Built 1966 Load: 30.1 t ADT: 17,665
I0012
FairOver: I-12 OVER I-55
I0012, Tangipahoa, LA
Built 1970 Load: 30.8 t ADT: 58,377
I0012
FairOver: I-12 OVER I-55
I0012, Tangipahoa, LA
Built 1970 Load: 30.8 t ADT: 21,736
SONTHEIMER Rd
FairOver: I-12
I0012, Tangipahoa, LA
Built 1975 Load: 30.8 t ADT: 4,830
I0055
FairOver: LITTLE NAT RIVER
I0055, Tangipahoa, LA
Built 1968 Load: 31.1 t ADT: 23,562
TOBIN Rd
FairOver: I-55
TOBIN ROAD OVER I-55, Tangipahoa, LA
Built 1970 Load: 31.8 t ADT: 3,660
LA1053
FairOver: LA 1053 OVER I-55
LA1053, Tangipahoa, LA
Built 1966 Load: 31.8 t ADT: 595
I0055
FairOver: COOLS CREEK
I0055, Tangipahoa, LA
Built 1966 Load: 32.1 t ADT: 21,762
I0055
FairOver: COOLS CREEK
I0055, Tangipahoa, LA
Built 1966 Load: 32.1 t ADT: 17,665
US0051
FairOver: DRAIN
2.50 MILES NORTH OF LA 44, Tangipahoa, LA
Built 2014 Load: 32.4 t ADT: 2,266
US0190
FairOver: DRAIN
3.6 M W OF I-55, Tangipahoa, LA
Built 1932 Load: 32.4 t ADT: 8,928
US0190
FairOver: DRAIN
0.3 M W OF LA 3158, Tangipahoa, LA
Built 1932 Load: 32.4 t ADT: 14,613
US0051
FairOver: CHUBBY CREEK
0.1 M S OF LA 1054, Tangipahoa, LA
Built 1956 Load: 32.4 t ADT: 2,403
LA0016
FairOver: CREEK
1.9 M W OF LA 445, Tangipahoa, LA
Built 1972 Load: 32.4 t ADT: 4,454
I0055
FairOver: DRAIN
3.8 M N OF LA 38, Tangipahoa, LA
Built 1966 Load: 32.4 t ADT: 21,762
I0012
FairOver: DRAIN
1.0 M E OF LA 1249, Tangipahoa, LA
Built 1970 Load: 32.4 t ADT: 45,151
I0012
FairOver: DRAINAGE
1.4 M E OF I-55, Tangipahoa, LA
Built 1970 Load: 32.4 t ADT: 58,377
I0012
FairOver: BEDICO CR.RELIEF
I0012, Tangipahoa, LA
Built 1974 Load: 32.4 t ADT: 53,386
C.M. Fagan Rd
FairOver: ARNOLDS CREEK
002 MI N US 51&I-12 FAGON, Tangipahoa, LA
Built 2003 Load: 32.4 t ADT: 13,316
I0012
FairOver: ICRR
I0012, Tangipahoa, LA
Built 1975 Load: 32.7 t ADT: 21,736
S. Coburn Rd
FairOver: SELSERS CREEK
0.4 MI. S OF LA. 1067, Tangipahoa, LA
Built 1996 Load: 32.7 t ADT: 94
Woodstone Dr
FairOver: YELLOW WATER CREEK
0.15M E OF US51/WOODSTONE, Tangipahoa, LA
Built 1992 Load: 32.7 t ADT: 418
Chappepeela Rd
FairOver: CHAPPEPEELA CREEK
0.2 MI. W OF LA 445, Tangipahoa, LA
Built 1990 Load: 32.7 t ADT: 1,145
Old Genessee Rd
FairOver: YELLOW WATER CREEK
2.4M SE OF EXIT 442, Tangipahoa, LA
Built 1993 Load: 32.7 t ADT: 557
Neal Rd
FairOver: LITTLE CHAPEPEELA CREEK
1.7 mi. w of la. 445, Tangipahoa, LA
Built 1992 Load: 32.7 t ADT: 878
E. Bell Rd
FairOver: PEAKS CREEK
2.8 MI SW OF JCT 16 & 445, Tangipahoa, LA
Built 1995 Load: 32.7 t ADT: 201
W. Olive St
FairOver: CREEK
.45MI SW US 51 W OLIVE, Tangipahoa, LA
Built 1979 Load: 32.7 t ADT: 1,520
LA0010
FairOver: TANGIPAHOA RIVER
0.7 Miles East of US 51, Tangipahoa, LA
Built 1966 Load: 34.5 t ADT: 3,768
I0012
FairOver: US 51 BUS.
I0012, Tangipahoa, LA
Built 1975 Load: 34.5 t ADT: 21,736
I0012
FairOver: ICG RAILROAD
I0010, Tangipahoa, LA
Built 1975 Load: 34.5 t ADT: 58,377
Gueldner Ln
FairOver: CREEK
5.0M SE OF LA 22 EXIT, Tangipahoa, LA
Built 1993 Load: 35.3 t ADT: 6
LA0022
FairOver: LA 22 OVER I-55
LA0022, Tangipahoa, LA
Built 1960 Load: 35.4 t ADT: 18,757
Briar Patch Cemt
FairOver: COOPER CREEK
2.2 MI NE OF JCT 40 &1062, Tangipahoa, LA
Built 2006 Load: 36.0 t ADT: 639
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.