Total bridges
142
Public highway bridges in Miller County
County profile · official public datasets
Miller County, MO
142 public highway bridges tracked in the FHWA National Bridge Inventory: 40.1% rated Good, 49.3% Fair, 10.6% Poor.
- 142
- Public bridges
- 40.1%
- Good condition
- 10.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Miller 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.
- 74th
- of 115 on Poor share
- 10.6%
- Poor-condition share
- 142
- public highway bridges
- 1971
- 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.
Miller County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Miller County ranks #74 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 10.6%). Miller County, Missouri contains 142 public highway bridges. Roughly 40.1% are rated “Good,” 49.3% “Fair,” and 10.6% “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
40.1%
57 of 142 rated 7-9
Fair condition
49.3%
70 of 142 rated 5-6
Poor condition
10.6%
15 of 142 rated 4 or below
In-state Poor-share rank
#74 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 142 NBI-tracked bridges by lowest applicable component rating.
Good 40.1% (57)
Fair 49.3% (70)
Poor 10.6% (15)
Miller County's Poor-condition bridges carry 3,687 vehicle crossings a day
That is 1.4% of the county's reported daily bridge traffic on 10.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 246 crossings a day against 1,849 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 142 of 142 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
54.9% of Miller County's bridges have passed the 50-year mark
78 of the 142 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 40.1% 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 57.3% of the county's Poor-condition bridge traffic
MO 42 E over SPRING BR, built 1964, carries 2,112 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 15-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 3,687 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Miller County's bridges were built
142 bridges with a recorded construction year, grouped by decade
- 1900s 4
1900–1909
4 bridges
- 1910s 3
1910–1919
3 bridges
- 1920s 6
1920–1929
6 bridges
- 1930s
1930–1939
32 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 8
1950–1959
8 bridges
- 1960s
1960–1969
13 bridges
- 1970s
1970–1979
13 bridges
- 1980s 1
1980–1989
1 bridges
- 1990s 10
1990–1999
10 bridges
- 2000s
2000–2009
20 bridges
- 2010s
2010–2019
24 bridges
- 2020s 7
2020–2029
7 bridges
What this shows Construction peaked in the 1930s, when 32 of the county's bridges still in the inventory were built, which is 22.5% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year is 1971, 8 years older than the Missouri average of 1979.
How Miller County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Miller County in number of bridges, with their condition splits. Its 10.6% Poor share is the 3rd-lowest of these 6. Its average build year of 1971 against a peer-group mean of 1974 is in line with the group.
Showing the 5 closest of 114 Missouri counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| McDonald County | 145 | 25.5% | 63.4% | 11% | 1976 |
| Gasconade County | 143 | 32.2% | 62.9% | 4.9% | 1972 |
| Miller County (this page) | 142 | 40.1% | 49.3% | 10.6% | 1971 |
| St. Clair County | 139 | 25.2% | 55.4% | 19.4% | 1972 |
| Ralls County | 138 | 31.9% | 60.9% | 7.2% | 1976 |
| Mercer County | 137 | 44.5% | 36.5% | 19% | 1976 |
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 Miller 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 Miller County, both outside Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (142 bridges here).
- Monroe County, AL · 142 bridges
- Henderson County, IL · 142 bridges
- Graham County, KS · 142 bridges
- Kenton County, KY · 142 bridges
Similar average build year
Nearest mean year-built outside MO (1971 here).
- Wayne County, MI · avg 1971 · 1,026 bridges
- Baltimore County, MD · avg 1971 · 783 bridges
- Washington County, PA · avg 1971 · 655 bridges
- Linn County, OR · avg 1971 · 566 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (70)
HOEKER RD
FairOver: TAVERN CR
S 7 T 41 N R 12 W, Miller, MO
Built 1997 Load: 35.1 t ADT: 100
MO 42 E
FairOver: TAVERN CR
S 20 T 39 N R 12 W, Miller, MO
Built 1993 Load: 36.0 t ADT: 3,074
MO 42 E
FairOver: WIEMER CR
S 2 T 39 N R 12 W, Miller, MO
Built 1990 Load: 36.9 t ADT: 1,308
US 54 E
FairOver: WRIGHTS CR
S 4 T 40 N R 15 W, Miller, MO
Built 1972 Load: 37.8 t ADT: 10,718
RT M E
FairOver: BURRIS BR
S 1 T 41 N R 15 W, Miller, MO
Built 1959 Load: 38.7 t ADT: 662
TAVERN CREEK RD
FairOver: TAVERN CR
S 35 T 39 N R 12 W, Miller, MO
Built 2011 Load: 43.2 t ADT: 25
MO 17 S
FairOver: RABBIT HEAD CR
S 25 T 39 N R 13 W, Miller, MO
Built 1932 Load: 43.2 t ADT: 2,050
US 54 E
FairOver: BRUSH CR
S 29 T 42 N R 14 W, Miller, MO
Built 1932 Load: 45.0 t ADT: 6,180
US 54 E
FairOver: OSAGE RVR
S 29 T 40 N R 15 W, Miller, MO
Built 2003 Load: 45.9 t ADT: 11,964
MO 42 E
FairOver: JOES BR
S 29 T 39 N R 14 W, Miller, MO
Built 1964 Load: 48.6 t ADT: 3,026
US 54 E
FairOver: DRY BR
S 8 T 40 N R 15 W, Miller, MO
Built 1973 Load: 51.3 t ADT: 21,120
MO 17 S
FairOver: HANSFORD BR
S 7 T 38 N R 12 W, Miller, MO
Built 1932 Load: 51.3 t ADT: 1,881
RT JJ E
FairOver: DOG CR
S 4 T 39 N R 14 W, Miller, MO
Built 1961 Load: 51.3 t ADT: 167
US 54 E
FairOver: SALINE CR
S 10 T 41 N R 15 W, Miller, MO
Built 1973 Load: 52.2 t ADT: 13,446
RT V E
FairOver: LIT GRAVOIS CR
S 8 T 40 N R 15 W, Miller, MO
Built 2001 Load: 58.5 t ADT: 337
BU 54 E
FairOver: BLYTHES CR
S 27 T 42 N R 15 W, Miller, MO
Built 1922 Load: 63.0 t ADT: 4,724
US 54 W
FairOver: BRUSH CR
S 29 T 42 N R 14 W, Miller, MO
Built 1975 Load: 80.1 t ADT: 6,277
MT CARMEL RD
FairOver: WRIGHTS CR
S 33 T 41 N R 15 W, Miller, MO
Built 1999 Load: 99.9 t ADT: 100
BLUESPRING RD
FairOver: BLUE SPRINGS CR
S 1 T 40 N R 16 W, Miller, MO
Built 1995 Load: 99.9 t ADT: 45
RT Z S
FairOver: BLUE SPRING CR
S 35 T 41 N R 16 W, Miller, MO
Built 1960 Load: 99.9 t ADT: 186
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.