Total bridges
201
Public highway bridges in Marion County
County profile · official public datasets
Marion County, MS
201 public highway bridges tracked in the FHWA National Bridge Inventory: 72.1% rated Good, 22.9% Fair, 5% Poor.
- 201
- Public bridges
- 72.1%
- Good condition
- 5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Marion County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 43rd
- of 82 on Poor share
- 5%
- Poor-condition share
- 201
- public highway bridges
- 1987
- 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.
Marion County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Marion County ranks #43 of 82 Mississippi counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5%). Marion County, Mississippi contains 201 public highway bridges. Roughly 72.1% are rated “Good,” 22.9% “Fair,” and 5% “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
72.1%
145 of 201 rated 7-9
Fair condition
22.9%
46 of 201 rated 5-6
Poor condition
5%
10 of 201 rated 4 or below
In-state Poor-share rank
#43 of 82
Among Mississippi counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 201 NBI-tracked bridges by lowest applicable component rating.
Good 72.1% (145)
Fair 22.9% (46)
Poor 5% (10)
Marion County's Poor-condition bridges carry 8,040 vehicle crossings a day
That is 2.5% of the county's reported daily bridge traffic on 5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 804 crossings a day against 1,792 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 201 of 201 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
25.9% of Marion County's bridges have passed the 50-year mark
52 of the 201 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 72.1% 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 80.8% of the county's Poor-condition bridge traffic
N MAIN ST/OLD 13 N over DRY CREEK, built 1960, carries 6,500 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 10-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 8,040 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Marion County's bridges were built
201 bridges with a recorded construction year, grouped by decade
- 1930s 2
1930–1939
2 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s 15
1950–1959
15 bridges
- 1960s 17
1960–1969
17 bridges
- 1970s 22
1970–1979
22 bridges
- 1980s
1980–1989
58 bridges
- 1990s
1990–1999
25 bridges
- 2000s 23
2000–2009
23 bridges
- 2010s 19
2010–2019
19 bridges
- 2020s 15
2020–2029
15 bridges
What this shows Construction peaked in the 1980s, when 58 of the county's bridges still in the inventory were built, which is 28.9% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1987) matches the Mississippi average (1986).
How Marion County compares with Mississippi's closest counties by inventory size
The 5 Mississippi counties nearest Marion County in number of bridges, with their condition splits. Its 5% Poor share is the 5th-lowest of these 6. Its average build year of 1987 against a peer-group mean of 1987 is in line with the group.
Showing the 5 closest of 81 Mississippi counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Union County | 202 | 53.5% | 45% | 1.5% | 1990 |
| Noxubee County | 201 | 50.2% | 45.8% | 4% | 1985 |
| Marion County (this page) | 201 | 72.1% | 22.9% | 5% | 1987 |
| Simpson County | 200 | 63.5% | 30% | 6.5% | 1984 |
| Leake County | 199 | 80.9% | 18.1% | 1% | 1986 |
| Neshoba County | 199 | 58.8% | 37.7% | 3.5% | 1989 |
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 Marion 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 Marion County, both outside Mississippi so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MS (201 bridges here).
- Williamson County, IL · 201 bridges
- Hancock County, IN · 201 bridges
- Pocahontas County, IA · 201 bridges
- McCracken County, KY · 201 bridges
Similar average build year
Nearest mean year-built outside MS (1987 here).
- St. Louis County, MO · avg 1987 · 912 bridges
- Ellis County, TX · avg 1987 · 691 bridges
- St. Louis County, MN · avg 1987 · 663 bridges
- Palm Beach County, FL · avg 1987 · 610 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (10)
DEWEY STREET
PoorOver: DRY CREEK
SEC 5 T 3N R18W, Marion, MS
Built 1969 Load: 0.0 t ADT: 300
SPELL DRIVE
PoorOver: CREEK
SEC 10 T 3N R18W, Marion, MS
Built 1988 Load: 0.0 t ADT: 50
ROBERT BAGGETT RD
PoorOver: CREEK
SEC 11 T 3N R18W, Marion, MS
Built 1987 Load: 0.0 t ADT: 100
OLD SEBE WATTS RD
PoorOver: BRANCH
SEC 5 T 4N R17W, Marion, MS
Built 1955 Load: 0.0 t ADT: 60
OLD PLACE ROAD
PoorOver: BRANCH
SEC 20 T 4N R17W, Marion, MS
Built 1984 Load: 0.0 t ADT: 50
FRIENDSHIP CHURCH
PoorOver: BRANCH
SEC 2 T 3N R18W, Marion, MS
Built 1969 Load: 0.0 t ADT: 20
OLD RIVER RD
PoorOver: CYPRESS CREEK
SEC 21 T 5N R19W B, Marion, MS
Built 1982 Load: 15.1 t ADT: 100
COLUMBIA-PURVIS RD
PoorOver: UPPER LITTLE RIVER
SEC 24 T 3N R18W B, Marion, MS
Built 1966 Load: 19.8 t ADT: 810
N MAIN ST/OLD 13 N
PoorOver: DRY CREEK
SEC 5 T 3N R18W, Marion, MS
Built 1960 Load: 21.8 t ADT: 6,500
EBENEZER ROAD
PoorOver: BRANCH
SEC 2 T 5N R18W, Marion, MS
Built 1979 Load: 28.4 t ADT: 50
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.