County profile · official public datasets

Mississippi County, MO

99 public highway bridges tracked in the FHWA National Bridge Inventory: 26.3% rated Good, 62.6% Fair, 11.1% Poor.

99
Public bridges
26.3%
Good condition
11.1%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Mississippi 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.

81st
of 115 on Poor share
11.1%
Poor-condition share
99
public highway bridges
1969
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.

Mississippi County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mississippi County ranks #81 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 11.1%). Mississippi County, Missouri contains 99 public highway bridges. Roughly 26.3% are rated “Good,” 62.6% “Fair,” and 11.1% “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.

Total bridges

99

Public highway bridges in Mississippi County

Good condition

26.3%

26 of 99 rated 7-9

Fair condition

62.6%

62 of 99 rated 5-6

Poor condition

11.1%

11 of 99 rated 4 or below

In-state Poor-share rank

#81 of 115

Among Missouri counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 99 NBI-tracked bridges by lowest applicable component rating.

Good
26.3% (26)
Fair
62.6% (62)
Poor
11.1% (11)

Mississippi County's Poor-condition bridges carry 9,727 vehicle crossings a day

That is 6.9% of the county's reported daily bridge traffic on 11.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 884 crossings a day against 328 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 99 of 99 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

61.6% of Mississippi County's bridges have passed the 50-year mark

61 of the 99 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 26.3% 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 57.4% of the county's Poor-condition bridge traffic

US 62 E over IS 57, built 1972, carries 5,588 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 11-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 9,727 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Mississippi County's bridges were built

99 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1930s, when 13 of the county's bridges still in the inventory were built, which is 13.1% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year is 1969, 10 years older than the Missouri average of 1979.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Mississippi County compares with Missouri's closest counties by inventory size

The 5 Missouri counties nearest Mississippi County in number of bridges, with their condition splits. Its 11.1% Poor share is the 4th-lowest of these 6. Its average build year of 1969 against a peer-group mean of 1969 is in line with the group.

Showing the 5 closest of 114 Missouri counties eligible for comparison.

Bridge inventory size and condition shares for Mississippi County and the 5 Missouri counties closest to it in inventory size
County Bridges Poor
Morgan County 105 10.5%
Pulaski County 104 10.6%
Ste. Genevieve County 104 10.6%
Osage County 100 18%
Mississippi County (this page) 99 11.1%
Moniteau County 93 12.9%

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 Mississippi 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 Mississippi County, both outside Missouri so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MO (99 bridges here).

Similar average build year

Nearest mean year-built outside MO (1969 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 99 Good 26 Fair 62 Poor 11

Good-condition bridges (26)

US 62 E

Good

Over: MAPLE SWITCH SLU

S 2 T 26 N R 15 E, Mississippi, MO

Built 1921 Load: 14.4 t ADT: 2,173

COUNTY RD 332

Good

Over: DRAIN DTCH NO 14

S 17 T 25 N R 16 E, Mississippi, MO

Built 1940 Load: 22.5 t ADT: 35

COUNTY RD 328

Good

Over: SPLWY DRAIN DTCH

S 2 T 25 N R 16 E, Mississippi, MO

Built 1948 Load: 26.1 t ADT: 15

MO 102 E

Good

Over: DRAIN DTCH #14

S 28 T 24 N R 16 E, Mississippi, MO

Built 2017 Load: 27.9 t ADT: 737

RT UU S

Good

Over: IS 57

S 9 T 26 N R 16 E, Mississippi, MO

Built 1959 Load: 28.8 t ADT: 632

COUNTY RD 334

Good

Over: SPLWY DRAIN DTCH

S 21 T 25 N R 16 E, Mississippi, MO

Built 1948 Load: 31.5 t ADT: 15

COUNTY RD 203

Good

Over: BIG LAKE BAYOU

S 5 T 27 N R 17 E, Mississippi, MO

Built 1989 Load: 32.4 t ADT: 35

COUNTY RD 324

Good

Over: DRAIN DTCH NO 14

S 20 T 26 N R 16 E, Mississippi, MO

Built 2002 Load: 32.4 t ADT: 35

COUNTY RD 325

Good

Over: DRAIN DTCH

S 26 T 26 N R 16 E, Mississippi, MO

Built 2023 Load: 32.4 t ADT: 35

COUNTY RD 319

Good

Over: DRAIN DTCH NO 29

S 15 T 25 N R 17 E, Mississippi, MO

Built 2023 Load: 32.4 t ADT: 10

COUNTY RD 414

Good

Over: DRAIN DTCH

S 7 T 25 N R 16 E, Mississippi, MO

Built 2024 Load: 32.4 t ADT: 35

COUNTY RD 515

Good

Over: TEN MILE POND

S 3 T 24 N R 16 E, Mississippi, MO

Built 1998 Load: 34.2 t ADT: 100

COUNTY RD 522

Good

Over: WOLF HOLE LATERAL

S 32 T 25 N R 16 E, Mississippi, MO

Built 2008 Load: 34.2 t ADT: 100

COUNTY RD 301

Good

Over: BREWERS LK

S 5 T 26 N R 18 E, Mississippi, MO

Built 1996 Load: 36.0 t ADT: 35

RT J S

Good

Over: DREDGE DTCH #23

S 1 T 26 N R 16 E, Mississippi, MO

Built 2010 Load: 36.0 t ADT: 128

COUNTY RD 326

Good

Over: DRAIN DTCH NO 14

S 29 T 26 N R 16 E, Mississippi, MO

Built 2020 Load: 36.0 t ADT: 35

RT C E

Good

Over: LATERAL #4

S 4 T 25 N R 15 E, Mississippi, MO

Built 2017 Load: 36.9 t ADT: 624

RT OO E

Good

Over: DRAIN DTCH #29

S 13 T 24 N R 15 E, Mississippi, MO

Built 2010 Load: 39.6 t ADT: 168

RT AA E

Good

Over: DRAIN DITCH #29

S 26 T 24 N R 17 E, Mississippi, MO

Built 2010 Load: 39.6 t ADT: 368

RT CC S

Good

Over: ASH SLU DTCH

S 1 T 25 N R 14 E, Mississippi, MO

Built 2010 Load: 39.6 t ADT: 440

RT D E

Good

Over: DRAIN DTCH #31

S 5 T 25 N R 17 E, Mississippi, MO

Built 1958 Load: 41.4 t ADT: 262

RT B S

Good

Over: IS 57

S 17 T 26 N R 15 E, Mississippi, MO

Built 1959 Load: 45.9 t ADT: 1,423

MO 77 S

Good

Over: SUB LATERAL OF LAT

S 3 T 24 N R 17 E, Mississippi, MO

Built 1984 Load: 48.6 t ADT: 347

COUNTY RD 312

Good

Over: DRAIN DTCH NO 29

S 34 T 26 N R 17 E, Mississippi, MO

Built 2013 Load: 63.0 t ADT: 10

RT JJ S

Good

Over: GOV DIVERSION DTCH

S 25 T 26 N R 16 E, Mississippi, MO

Built 2010 Load: 81.0 t ADT: 118

RT C E

Good

Over: DRAIN DTCH #14

S 6 T 25 N R 16 E, Mississippi, MO

Built 2015 Load: 82.8 t ADT: 624

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
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.