Total bridges
178
Public highway bridges in Allen County
County profile · official public datasets
Allen County, LA
178 public highway bridges tracked in the FHWA National Bridge Inventory: 15.2% rated Good, 72.5% Fair, 12.4% Poor.
- 178
- Public bridges
- 15.2%
- Good condition
- 12.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Allen County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 39th
- of 64 on Poor share
- 12.4%
- Poor-condition share
- 178
- public highway bridges
- 1983
- 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.
Allen County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Allen County ranks #39 of 64 Louisiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12.4%). Allen County, Louisiana contains 178 public highway bridges. Roughly 15.2% are rated “Good,” 72.5% “Fair,” and 12.4% “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
15.2%
27 of 178 rated 7-9
Fair condition
72.5%
129 of 178 rated 5-6
Poor condition
12.4%
22 of 178 rated 4 or below
In-state Poor-share rank
#39 of 64
Among Louisiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 178 NBI-tracked bridges by lowest applicable component rating.
Good 15.2% (27)
Fair 72.5% (129)
Poor 12.4% (22)
Allen County's Poor-condition bridges carry 16,229 vehicle crossings a day
That is 4.1% of the county's reported daily bridge traffic on 12.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 738 crossings a day against 1,829 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 178 of 178 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
33.1% of Allen County's bridges have passed the 50-year mark
59 of the 178 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 15.2% 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 24.2% of the county's Poor-condition bridge traffic
US0190 over WEST CALCASIEU RIVER REL, built 1980, carries 3,923 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 22-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 16,229 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Allen County's bridges were built
178 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 11
1930–1939
11 bridges
- 1950s
1950–1959
16 bridges
- 1960s
1960–1969
19 bridges
- 1970s
1970–1979
21 bridges
- 1980s
1980–1989
24 bridges
- 1990s
1990–1999
30 bridges
- 2000s
2000–2009
37 bridges
- 2010s
2010–2019
17 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 2000s, when 37 of the county's bridges still in the inventory were built, which is 20.8% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year (1983) matches the Louisiana average (1982).
How Allen County compares with Louisiana's closest counties by inventory size
The 5 Louisiana counties nearest Allen County in number of bridges, with their condition splits. Its 12.4% Poor share is the 3rd-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1980 is in line with the group.
Showing the 5 closest of 63 Louisiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| LaSalle County | 195 | 60% | 34.4% | 5.6% | 1983 |
| Webster County | 194 | 21.6% | 53.1% | 25.3% | 1975 |
| Bienville County | 190 | 20% | 51.6% | 28.4% | 1979 |
| Allen County (this page) | 178 | 15.2% | 72.5% | 12.4% | 1983 |
| Lincoln County | 171 | 22.8% | 63.7% | 13.5% | 1982 |
| Jackson County | 163 | 28.2% | 64.4% | 7.4% | 1982 |
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 Allen 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 Allen County, both outside Louisiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside LA (178 bridges here).
- Webster County, MS · 178 bridges
- Clark County, MO · 178 bridges
- Monroe County, MO · 178 bridges
- Ontario County, NY · 178 bridges
Similar average build year
Nearest mean year-built outside LA (1983 here).
- Dallas County, TX · avg 1983 · 3,230 bridges
- Bexar County, TX · avg 1983 · 2,342 bridges
- Sedgwick County, KS · avg 1983 · 1,333 bridges
- Will County, IL · avg 1983 · 649 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (129)
MUSSEL WHITE RD
FairOver: CHINQUAPIN CREEK
5.4 MI NE OF LA 26, Allen, LA
Built 1982 Load: 8.7 t ADT: 110
ARKADELPHIA RD
FairOver: SIX MILE CREEK RELIEF
3.9 MI WEST OF LA 377, Allen, LA
Built 1975 Load: 10.9 t ADT: 260
REEDS BRIDGE RD
FairOver: CALCASIEU RIVER RELIEF
1.6 MI WEST OF US 165, Allen, LA
Built 1979 Load: 12.0 t ADT: 132
US0165
FairOver: KINDER CANAL
1.5 MI. N OF INT US 190, Allen, LA
Built 1932 Load: 14.6 t ADT: 11,886
OLD PUMP RD
FairOver: CALCASIEU RIVER
1.4 MI NORTH OF US 190, Allen, LA
Built 1960 Load: 14.7 t ADT: 581
US0165
FairOver: DRAIN
3.2 MI. N OF INT LA1153, Allen, LA
Built 1931 Load: 15.9 t ADT: 11,113
NURSERY RD
FairOver: CANEY CREEK
0.5 MI N of Ward Line Rd, Allen, LA
Built 1970 Load: 16.3 t ADT: 859
US0165
FairOver: DRAIN
10.0 MI. N. OF LA 26, Allen, LA
Built 1931 Load: 17.8 t ADT: 11,886
LA0010
FairOver: MILL CREEK
0.6 MI. W OF INT LA3206, Allen, LA
Built 1968 Load: 18.1 t ADT: 2,773
LA0112
FairOver: DRAIN
1.1 MI NORTH OF LA 10, Allen, LA
Built 1960 Load: 18.1 t ADT: 1,330
NIELSON RD
FairOver: KINDER DITCH
1.2 MI EAST OF US 165, Allen, LA
Built 1999 Load: 18.5 t ADT: 561
BEL FIRE TOWER RD
FairOver: CLEAR CREEK
1.0 MI N OF US 190, Allen, LA
Built 1992 Load: 18.5 t ADT: 420
DUPLECHAIN RD
FairOver: MULBERRY CREEK
0.4 MI E OF C-CASTOR RD., Allen, LA
Built 1997 Load: 18.5 t ADT: 105
MUSSEL WHITE RD
FairOver: OBERLIN DITCH
0.2 MI N of LA026, Allen, LA
Built 1999 Load: 18.5 t ADT: 106
PALESTINE RD
FairOver: TEN MILE CREEK
4.90MI EAST OF LA 377, Allen, LA
Built 1985 Load: 18.5 t ADT: 190
BILL WINN RD
FairOver: WEST FORK CANEY CREEK
0.9 MI W OF LA372, Allen, LA
Built 1999 Load: 18.5 t ADT: 100
SOAPSTONE RD
FairOver: CANEY BRANCH
1.6 MI N of LA 112, Allen, LA
Built 1999 Load: 18.5 t ADT: 306
US0190
FairOver: CREEK
7.3 MI. E OF INT LA 113, Allen, LA
Built 1954 Load: 19.1 t ADT: 3,923
LA0026
FairOver: BAYOU BLUE RELIEF
3.5 MI S OF LA 104, Allen, LA
Built 1957 Load: 19.1 t ADT: 2,027
LA0026
FairOver: BAYOU BLUE
4.0 MI. N OF US190, Allen, LA
Built 1957 Load: 19.1 t ADT: 1,088
PALESTINE RD
FairOver: CREEK
2.6 MI EAST OF LA 377, Allen, LA
Built 1970 Load: 19.1 t ADT: 609
US0190
FairOver: SLOUGH
7.49 MI. E OF INT LA 113, Allen, LA
Built 1954 Load: 20.0 t ADT: 3,923
US0190
FairOver: SLOUGH
7.78 MI. E OF INT LA 113, Allen, LA
Built 1954 Load: 20.0 t ADT: 3,923
TURNER RD
FairOver: CREEK
2.7 MI N of LA 26, Allen, LA
Built 1970 Load: 20.0 t ADT: 356
TURNER RD
FairOver: CREEK
5.2 MI NORTH OF LA 26, Allen, LA
Built 1970 Load: 20.0 t ADT: 314
LIVE OAK ST
FairOver: MILL CREEK
0.3 MI SOUTTH OF LA 1156, Allen, LA
Built 2007 Load: 21.1 t ADT: 1,300
US0165
FairOver: DRAIN
5.0 MI. N. OF LA 26, Allen, LA
Built 1931 Load: 21.4 t ADT: 11,886
CC BEL RD
FairOver: BLUE BAYOU
1.7 MI. W. OF POWELL RD, Allen, LA
Built 2001 Load: 21.7 t ADT: 1,148
LA0383
FairOver: KINDER DITCH
4.7 MI W OF US 165, Allen, LA
Built 1959 Load: 21.8 t ADT: 2,193
SONNIER RD
FairOver: CREEK
0.7 MI S OF PAUL FRANK RD, Allen, LA
Built 2010 Load: 22.0 t ADT: 50
US0190
FairOver: CREEK
5.8 MI. E OF INT LA 113, Allen, LA
Built 1931 Load: 22.0 t ADT: 3,263
US0165
FairOver: BAYOU
2.2 MI S of LA 26, Allen, LA
Built 1962 Load: 22.0 t ADT: 8,809
LA0372
FairOver: W FORK CANEY CR
5.2 MI S OF LA 10, Allen, LA
Built 1971 Load: 22.4 t ADT: 651
US0190
FairOver: BAYOU SERPENT
2.86 MI. E OF INT US165, Allen, LA
Built 1932 Load: 23.0 t ADT: 6,929
LA0113
FairOver: MUD CREEK
0.5 MI. N. OF US 190, Allen, LA
Built 1959 Load: 23.6 t ADT: 1,312
LA0113
FairOver: MUD CREEK
4.1 MI. N. OF US 190, Allen, LA
Built 1959 Load: 23.6 t ADT: 1,312
LA0112
FairOver: SIX MI CR RELIEF
0.2 MI. E. Of LA 377, Allen, LA
Built 1962 Load: 23.6 t ADT: 1,138
LA0112
FairOver: SIX MILE CREEK
0.3 MI E OF LA 377, Allen, LA
Built 1962 Load: 23.6 t ADT: 1,138
LA0112
FairOver: TEN MILE CREEK
1.1 MI. E OF LA377, Allen, LA
Built 1960 Load: 23.6 t ADT: 1,138
OLD PUMP RD
FairOver: CALCASIEU RIVER RELIEF
0.8 MI. W. OF CHAPPEL RD, Allen, LA
Built 2009 Load: 23.7 t ADT: 581
S RIVER RD
FairOver: CURTIS CREEK
2.2 MI WEST OF US165, Allen, LA
Built 1982 Load: 23.7 t ADT: 60
RIVER RD
FairOver: NORTH CREEK #2
0.7 MI NORTH OF LA 10, Allen, LA
Built 2003 Load: 23.7 t ADT: 140
POWELL RD
FairOver: BLUE BAYOU
0.9 MI. S. OF CC BELL RD, Allen, LA
Built 2001 Load: 24.0 t ADT: 446
PERKINS LN
FairOver: CLEAR CREEK
0.3 MI W OF B. F. TOWER, Allen, LA
Built 2004 Load: 24.9 t ADT: 40
PALESTINE RD
FairOver: SIX MILE CREEK RELIEF
1.8 MI E OF LA 377, Allen, LA
Built 2003 Load: 24.9 t ADT: 609
US0165
FairOver: DRAINAGE DITCH
0.5 MI. N. OF LA 26, Allen, LA
Built 2000 Load: 25.3 t ADT: 11,886
LA1156
FairOver: MAB BRANCH
0.9 MI. S OF LA3206, Allen, LA
Built 1979 Load: 25.3 t ADT: 550
BUCK BOWLES RD
FairOver: SONNIER BAYOU
1.1 MI WEST OF LA 26, Allen, LA
Built 2001 Load: 25.3 t ADT: 150
PALESTINE RD
FairOver: SIX MILE CREEK
1.9 MI E OF LA 377, Allen, LA
Built 2003 Load: 25.3 t ADT: 609
PIERSON RD
FairOver: CREEK
0.1 M W OF K. CEM. RD, Allen, LA
Built 1973 Load: 25.4 t ADT: 130
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.