Total bridges
163
Public highway bridges in Montgomery County
County profile · official public datasets
Montgomery County, MO
163 public highway bridges tracked in the FHWA National Bridge Inventory: 28.8% rated Good, 65% Fair, 6.1% Poor.
- 163
- Public bridges
- 28.8%
- Good condition
- 6.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Montgomery County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 26%
- lowest Poor share in state
- 6.1%
- Poor-condition share
- 163
- public highway bridges
- 1979
- 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.
Montgomery County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Montgomery County ranks #30 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.1%). Montgomery County, Missouri contains 163 public highway bridges. Roughly 28.8% are rated “Good,” 65% “Fair,” and 6.1% “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.
Good condition
28.8%
47 of 163 rated 7-9
Fair condition
65%
106 of 163 rated 5-6
Poor condition
6.1%
10 of 163 rated 4 or below
In-state Poor-share rank
#30 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 163 NBI-tracked bridges by lowest applicable component rating.
Good 28.8% (47)
Fair 65% (106)
Poor 6.1% (10)
Montgomery County's Poor-condition bridges carry 2,465 vehicle crossings a day
That is 2.1% of the county's reported daily bridge traffic on 6.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 247 crossings a day against 1,508 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 163 of 163 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
40.5% of Montgomery County's bridges have passed the 50-year mark
66 of the 163 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 28.8% 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 37.5% of the county's Poor-condition bridge traffic
MO 161 S over ELKHORN CR, built 1932, carries 924 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 2,465 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Montgomery County's bridges were built
163 bridges with a recorded construction year, grouped by decade
- 1900s 2
1900–1909
2 bridges
- 1910s 3
1910–1919
3 bridges
- 1930s 12
1930–1939
12 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s
1950–1959
13 bridges
- 1960s
1960–1969
25 bridges
- 1970s 10
1970–1979
10 bridges
- 1980s
1980–1989
24 bridges
- 1990s
1990–1999
32 bridges
- 2000s
2000–2009
20 bridges
- 2010s 12
2010–2019
12 bridges
- 2020s 5
2020–2029
5 bridges
What this shows Construction peaked in the 1990s, when 32 of the county's bridges still in the inventory were built, which is 19.6% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1979) matches the Missouri average (1979).
How Montgomery County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Montgomery County in number of bridges, with their condition splits. Its 6.1% Poor share is the 3rd-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1974 is 5 years newer.
Showing the 5 closest of 114 Missouri counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| St. Francois County | 165 | 38.2% | 51.5% | 10.3% | 1968 |
| Randolph County | 163 | 60.1% | 36.8% | 3.1% | 1984 |
| Montgomery County (this page) | 163 | 28.8% | 65% | 6.1% | 1979 |
| Andrew County | 162 | 38.9% | 46.3% | 14.8% | 1984 |
| Texas County | 162 | 26.5% | 66% | 7.4% | 1963 |
| Dade County | 161 | 36.6% | 58.4% | 5% | 1972 |
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 Montgomery 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 Montgomery County, both outside Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (163 bridges here).
- Mercer County, IL · 163 bridges
- Jennings County, IN · 163 bridges
- Wayne County, IA · 163 bridges
- Jackson County, LA · 163 bridges
Similar average build year
Nearest mean year-built outside MO (1979 here).
- Pima County, AZ · avg 1979 · 1,150 bridges
- Jefferson County, KY · avg 1979 · 662 bridges
- Spartanburg County, SC · avg 1979 · 638 bridges
- McPherson County, KS · avg 1979 · 586 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (163)
MEADOWLARK RD
GoodOver: BRUSH CR
S 8 T 49 N R 4 W, Montgomery, MO
Built 2006 Load: 52.2 t ADT: 200
RT N S
GoodOver: IS 70
S 30 T 48 N R 6 W, Montgomery, MO
Built 2020 Load: 56.7 t ADT: 184
MO 19 S
GoodOver: IS 70
S 27 T 48 N R 5 W, Montgomery, MO
Built 2023 Load: 56.7 t ADT: 8,677
PROHIBITION RD
PoorOver: WOLF CR
S 5 T 49 N R 4 W, Montgomery, MO
Built 1912 Load: 7.2 t ADT: 15
MO 161 S
PoorOver: ELKHORN CR
S 2 T 49 N R 5 W, Montgomery, MO
Built 1932 Load: 8.1 t ADT: 924
KETTLE RD
PoorOver: WOLF CR
S 7 T 49 N R 4 W, Montgomery, MO
Built 1910 Load: 11.7 t ADT: 20
BETHEL CHURCH RD
PoorOver: LIT LOUTRE CR
S 20 T 49 N R 6 W, Montgomery, MO
Built 1965 Load: 11.7 t ADT: 100
L BEAR CREEK RD
PoorOver: LIT BEAR CR
S 35 T 47 N R 5 W, Montgomery, MO
Built 1970 Load: 12.6 t ADT: 50
RT ZZ S
PoorOver: LOUTRE CR
S 5 T 49 N R 6 W, Montgomery, MO
Built 1966 Load: 13.5 t ADT: 80
RT K E
PoorOver: LOUTRE RVR
S 33 T 47 N R 5 W, Montgomery, MO
Built 1960 Load: 17.1 t ADT: 488
RT K E
PoorOver: DRY FORK CR
S 29 T 47 N R 5 W, Montgomery, MO
Built 1954 Load: 18.0 t ADT: 488
FREEMONT RD
PoorOver: CROOKED CR
S 12 T 50 N R 5 W, Montgomery, MO
Built 1968 Load: 18.9 t ADT: 150
FREEMONT RD
PoorOver: COON CR
S 12 T 50 N R 5 W, Montgomery, MO
Built 1949 Load: 26.1 t ADT: 150
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.