Total bridges
121
Public highway bridges in Union County
County profile · official public datasets
Union County, LA
121 public highway bridges tracked in the FHWA National Bridge Inventory: 21.5% rated Good, 66.9% Fair, 11.6% Poor.
- 121
- Public bridges
- 21.5%
- Good condition
- 11.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Union 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.
- 37th
- of 64 on Poor share
- 11.6%
- Poor-condition share
- 121
- 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.
Union County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Union County ranks #37 of 64 Louisiana counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.6%). Union County, Louisiana contains 121 public highway bridges. Roughly 21.5% are rated “Good,” 66.9% “Fair,” and 11.6% “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
21.5%
26 of 121 rated 7-9
Fair condition
66.9%
81 of 121 rated 5-6
Poor condition
11.6%
14 of 121 rated 4 or below
In-state Poor-share rank
#37 of 64
Among Louisiana counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 121 NBI-tracked bridges by lowest applicable component rating.
Good 21.5% (26)
Fair 66.9% (81)
Poor 11.6% (14)
Union County's Poor-condition bridges carry 16,163 vehicle crossings a day
That is 7.4% of the county's reported daily bridge traffic on 11.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,155 crossings a day against 866 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 120 of 121 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
42.1% of Union County's bridges have passed the 50-year mark
51 of the 121 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 21.5% 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 38.6% of the county's Poor-condition bridge traffic
LA0002 over CREEK, built 1931, carries 6,236 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 14-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 16,163 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Union County's bridges were built
121 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 8
1930–1939
8 bridges
- 1950s
1950–1959
25 bridges
- 1960s 8
1960–1969
8 bridges
- 1970s
1970–1979
16 bridges
- 1980s
1980–1989
18 bridges
- 1990s
1990–1999
19 bridges
- 2000s
2000–2009
13 bridges
- 2010s
2010–2019
11 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1950s, when 25 of the county's bridges still in the inventory were built, which is 20.7% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1977, 5 years older than the Louisiana average of 1982.
How Union County compares with Louisiana's closest counties by inventory size
The 5 Louisiana counties nearest Union County in number of bridges, with their condition splits. Its 11.6% Poor share is the 5th-lowest of these 6. Its average build year of 1977 against a peer-group mean of 1981 is in line with the group.
Showing the 5 closest of 63 Louisiana counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Franklin County | 131 | 64.9% | 32.1% | 3.1% | 1989 |
| Lafourche County | 130 | 39.2% | 44.6% | 16.2% | 1981 |
| Caldwell County | 124 | 57.3% | 34.7% | 8.1% | 1982 |
| St. Mary County | 124 | 31.5% | 62.1% | 6.5% | 1975 |
| Union County (this page) | 121 | 21.5% | 66.9% | 11.6% | 1977 |
| St. Martin County | 116 | 37.9% | 53.4% | 8.6% | 1980 |
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 Union 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 Union County, both outside Louisiana so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside LA (121 bridges here).
- Sutter County, CA · 121 bridges
- Gadsden County, FL · 121 bridges
- Emanuel County, GA · 121 bridges
- Montcalm County, MI · 121 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 (121)
CECIL CREEK ROAD
GoodOver: CECIL CREEK
SEC 6 T22N R3E, Union, LA
Built 2005 Load: 40.8 t ADT: 3
S. GAS LINE RD.
GoodOver: CUT-OFF CREEK
2 MI S OF MAINT FACILITY, Union, LA
Built 2005 Load: 40.8 t ADT: 3
S. GAS LINE RD.
GoodOver: CECIL CREEK (BIG LAKE)
SEC 31 T22N R3E, Union, LA
Built 2005 Load: 40.8 t ADT: 10
LA0015
GoodOver: TEN MILE CREEK
3.0 MI WEST OF LA 558, Union, LA
Built 1981 Load: 40.8 t ADT: 651
LA0143
GoodOver: HAILE CREEK
0.22 MI N of HAILE LOOP, Union, LA
Built 2001 Load: 42.6 t ADT: 2,254
Cypress Creek Rd
GoodOver: Boatwright Creek
1.7 Mi S. of LA 15, Union, LA
Built 2020 Load: 44.1 t ADT: 25
US0167
GoodOver: CORNEY BAYOU
2.25 MI. SOUTH OF LA 15, Union, LA
Built 2012 Load: 47.0 t ADT: 422
LA0151
PoorOver: CREEK
0.1 MI WEST OF LA 33, Union, LA
Built 1961 Load: 0.0 t ADT: 527
LINVILLE FIRE TWR
PoorOver: BAYOU DE LOUTRE
2.8 MI. NE INT. 470, Union, LA
Built 1975 Load: 0.0 t ADT: 290
ROCKY BRANCH RD
PoorOver: BAYOU DARBONNE
1.1 MI. W. INT. 489, Union, LA
Built 1974 Load: 10.0 t ADT: 117
LA0151
PoorOver: STOWE CR REL BR
.1 MI EAST OF LA 33, Union, LA
Built 1961 Load: 14.9 t ADT: 527
LA0002
PoorOver: CREEK
6.2 MI EAST OF LA 33, Union, LA
Built 1931 Load: 17.8 t ADT: 6,236
LA0550
PoorOver: CREEK
4.12 MI NORTH OF LA 15, Union, LA
Built 1936 Load: 18.1 t ADT: 464
LA0550
PoorOver: LION CREEK
8.9 MI NORTH OF LA 15, Union, LA
Built 1950 Load: 18.1 t ADT: 464
LA0151
PoorOver: STOWE CREEK
.14 MI EAST OF LA 33, Union, LA
Built 1961 Load: 27.2 t ADT: 527
LA0015
PoorOver: CREEK
.8 MI NORTH OF LA 549, Union, LA
Built 1953 Load: 32.4 t ADT: 5,557
LINVILLE FIRE TWR
PoorOver: ROCK CREEK
6.7 MI. ENE INT. 470, Union, LA
Built 1982 Load: 32.4 t ADT: 457
LA0550
PoorOver: VILLAGE CREEK
4.1 MI NORTH OF LA 2, Union, LA
Built 1982 Load: 33.4 t ADT: 464
PRICE RD
PoorOver: LEE CREEK
.5 MI S. INT. 195, Union, LA
Built 1994 Load: 61.6 t ADT: 32
WHITE OAK LANDING
PoorOver: EDMONDS CREEK
.03 MI. N. INT. 088, Union, LA
Built 1984 Load: 74.5 t ADT: 135
PILGRIM REST CH RD
PoorOver: STEEP BANK CREEK
1.7 MI. NW INT. 209, Union, LA
Built 1983 Load: 74.5 t ADT: 366
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.