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.
Good-condition bridges (194)
I0055
GoodOver: PONCHATOULA CR.
I0055, Tangipahoa, LA
Built 1960 Load: 36.3 t ADT: 39,850
I0055
GoodOver: PONCHATOULA CR.
I0055, Tangipahoa, LA
Built 1960 Load: 36.3 t ADT: 21,736
S RANGE Rd
GoodOver: I-12
I0010, Tangipahoa, LA
Built 1975 Load: 36.3 t ADT: 5,920
Bennett Rd
GoodOver: NATALBANY CREEK
1.7 MILES SOUTHEAST OF LA, Tangipahoa, LA
Built 2010 Load: 36.9 t ADT: 320
Z. McDaniel Rd
GoodOver: REEDY BRANCH
5.0 MILES NORTHEAST OF JC, Tangipahoa, LA
Built 2010 Load: 36.9 t ADT: 300
Sisters Rd
GoodOver: Selsers Creek
1.5 Mi N. of LA 22, Tangipahoa, LA
Built 2022 Load: 36.9 t ADT: 3,345
LA1057
GoodOver: DRAIN
LA. 1057, Tangipahoa, LA
Built 1965 Load: 36.9 t ADT: 1,695
N. Hayes Rd
GoodOver: IRVING BRANCH
2.4 MI N OF JCT 38 & 1054, Tangipahoa, LA
Built 2006 Load: 36.9 t ADT: 83
LA0040
GoodOver: DRAIN
LA 40 LOG MILE 01.05, Tangipahoa, LA
Built 1982 Load: 37.2 t ADT: 4,748
LA0040
GoodOver: DAVIS BRANCH
0.7 M SE OF LA 1054, Tangipahoa, LA
Built 1981 Load: 37.2 t ADT: 4,748
E. Little Italy Rd
GoodOver: CREEK
0.1 Mi E of S Range Rd, Tangipahoa, LA
Built 2010 Load: 37.3 t ADT: 1,700
J. W. Davis Dr
GoodOver: CREEK
2.2 MILES SOUTHEAST OF US, Tangipahoa, LA
Built 2012 Load: 37.3 t ADT: 3,070
N. Cooper Rd
GoodOver: COOPER CREEK
4 MILES SOUTHEAST OF JCT, Tangipahoa, LA
Built 2009 Load: 37.3 t ADT: 961
Byers Ln
GoodOver: BEDICO CREEK
0.8 MI N/E OF LA 22, Tangipahoa, LA
Built 1999 Load: 37.9 t ADT: 388
I0055
GoodOver: OFF RAMP US 51 MANCHAC
9.9 M S OF LA 22, Tangipahoa, LA
Built 1979 Load: 38.1 t ADT: 8,115
I0012
GoodOver: NATALBANY RIVER
I0012, Tangipahoa, LA
Built 1970 Load: 38.1 t ADT: 21,300
LA1054
GoodOver: TANGIPAHOA RIVER RELIEF
1.23 MILES EAST OF JCT US, Tangipahoa, LA
Built 2008 Load: 38.2 t ADT: 1,235
LA1054
GoodOver: TANGIPAHOA RIVER RELIEF
1.58 MILES EAST OF JCT US, Tangipahoa, LA
Built 2008 Load: 38.2 t ADT: 1,235
LA1054
GoodOver: TANGIPAHOA RIVER RELIEF
1.64 MILES EAST OF JCT US, Tangipahoa, LA
Built 2008 Load: 38.2 t ADT: 1,235
LA1054
GoodOver: TANGIPAHOA RIVER RELIEF
1.69 MILES EAST OF JCT US, Tangipahoa, LA
Built 2008 Load: 38.2 t ADT: 1,235
E. Church St
GoodOver: PONCHATOULA CREEK
0.45 MILES EAST OF LA 106, Tangipahoa, LA
Built 2008 Load: 38.6 t ADT: 1,278
Weinberger Rd
GoodOver: BIG BRANCH
1.90 M S of LA 22, Tangipahoa, LA
Built 1984 Load: 38.9 t ADT: 549
LA0038
GoodOver: SLOUGH
0.65 MI. EAST OF US 51, Tangipahoa, LA
Built 1974 Load: 39.0 t ADT: 3,120
LA0038
GoodOver: TANG. R. W.RELIEF
LA0038, Tangipahoa, LA
Built 1975 Load: 39.0 t ADT: 3,120
LA0038
GoodOver: TANGIPAHOA RIVER E RELIE
LA0038, Tangipahoa, LA
Built 1975 Load: 39.0 t ADT: 3,120
LA1053
GoodOver: HAW BRANCH
4.7 MI N-W US 51 INTER., Tangipahoa, LA
Built 1996 Load: 39.0 t ADT: 595
LA1053
GoodOver: LINE CREEK
5.3 MI NW US 51 INTER., Tangipahoa, LA
Built 1996 Load: 39.0 t ADT: 595
Weinberger Rd
GoodOver: Big Branch
1.90 Mi. S. of La 22, Tangipahoa, LA
Built 2018 Load: 39.2 t ADT: 459
Durbin Rd
GoodOver: Moran Branch
.06 mi south of la 504, Tangipahoa, LA
Built 2018 Load: 39.5 t ADT: 575
Wadesboro Rd
GoodOver: CREEK
3.5 MI SW OF SR 22 EXIT, Tangipahoa, LA
Built 1999 Load: 39.5 t ADT: 585
Doc Hyde Rd
GoodOver: WASHLEY CREEK
3MI NE/LA445 BOBBYHYDE RD, Tangipahoa, LA
Built 1985 Load: 39.5 t ADT: 550
Chappepeela Rd
GoodOver: CHAPPEPEELA RELIEF BRIDG
4.0M NW OF JCT 190 & 445, Tangipahoa, LA
Built 1992 Load: 39.5 t ADT: 1,145
Richardson Rd
GoodOver: MORGAN BRANCH
1.3 MI N/E JCT 1063 & 442, Tangipahoa, LA
Built 2000 Load: 39.5 t ADT: 117
Jules Waller Rd
GoodOver: JENNY BRANCH
JULES WALLER ROAD, Tangipahoa, LA
Built 1999 Load: 39.5 t ADT: 196
LA0038
GoodOver: TERRYS CREEK
LA0038, Tangipahoa, LA
Built 1974 Load: 39.9 t ADT: 3,120
LA3234
GoodOver: PONCHATOULA CREEK
1.1 MI EAST US 51 INTER., Tangipahoa, LA
Built 1995 Load: 39.9 t ADT: 18,303
N. Oak St
GoodOver: CREEK
1.7 MI SO LA 1064 ON NOAK, Tangipahoa, LA
Built 1996 Load: 40.2 t ADT: 3,757
Quick Blvd.
GoodOver: CREEK
1.0 MI N/W JCT I55&3234, Tangipahoa, LA
Built 2007 Load: 40.5 t ADT: 174
I0012
GoodOver: TANGIPAHOA RELIEF
I0012, Tangipahoa, LA
Built 1975 Load: 40.8 t ADT: 53,386
I0012
GoodOver: TANGIPAHOA RELIEF
I0012, Tangipahoa, LA
Built 1975 Load: 40.8 t ADT: 17,665
I0012
GoodOver: TANGIPAHOA RIVER RELIEF
I0012, Tangipahoa, LA
Built 1975 Load: 40.8 t ADT: 17,665
LA0443
GoodOver: TANGIPAHOA RIVER RELIEF
1.2 mi NE of LA 1064, Tangipahoa, LA
Built 1986 Load: 40.8 t ADT: 6,478
LA3234
GoodOver: YELLOW WATER CREEK
1.35 MI EAST I-55 INTER, Tangipahoa, LA
Built 1995 Load: 40.8 t ADT: 18,303
LA0010
GoodOver: LA 10 OVER I-55
LA 0010, Tangipahoa, LA
Built 1967 Load: 41.7 t ADT: 899
LA0442
GoodOver: LA 442 OVER I-55
LA0442, Tangipahoa, LA
Built 1970 Load: 41.7 t ADT: 5,026
I0055
GoodOver: I-55 OVER LA 1048
I0055, Tangipahoa, LA
Built 1967 Load: 41.7 t ADT: 21,762
I0055
GoodOver: PARISH ROAD
I0055, Tangipahoa, LA
Built 1966 Load: 41.7 t ADT: 17,665
Wardline Rd
GoodOver: NATALBANY RIVER RELIEF
4MI N/W OR RT 190 EXIT, Tangipahoa, LA
Built 1998 Load: 42.1 t ADT: 1,259
Esterbrook Rd
GoodOver: SELSERS CREEK
4 MI. S.E. LA 3158 EXIT, Tangipahoa, LA
Built 1986 Load: 42.4 t ADT: 1,899
Yokum Rd
GoodOver: PONCHATOULA CREEK
2.6 MI N.E. OF JCT. 51&22, Tangipahoa, LA
Built 1986 Load: 42.4 t ADT: 1,008
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.