Total bridges
178
Public highway bridges in Monroe County
County profile · official public datasets
Monroe County, MO
178 public highway bridges tracked in the FHWA National Bridge Inventory: 29.8% rated Good, 55.6% Fair, 14.6% Poor.
- 178
- Public bridges
- 29.8%
- Good condition
- 14.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Monroe 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.
- 92nd
- of 115 on Poor share
- 14.6%
- Poor-condition share
- 178
- public highway bridges
- 1974
- 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.
Monroe County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Monroe County ranks #92 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 14.6%). Monroe County, Missouri contains 178 public highway bridges. Roughly 29.8% are rated “Good,” 55.6% “Fair,” and 14.6% “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
29.8%
53 of 178 rated 7-9
Fair condition
55.6%
99 of 178 rated 5-6
Poor condition
14.6%
26 of 178 rated 4 or below
In-state Poor-share rank
#92 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 178 NBI-tracked bridges by lowest applicable component rating.
Good 29.8% (53)
Fair 55.6% (99)
Poor 14.6% (26)
Monroe County's Poor-condition bridges carry 5,217 vehicle crossings a day
That is 10.4% of the county's reported daily bridge traffic on 14.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 201 crossings a day against 217 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 178 of 178 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
40.4% of Monroe County's bridges have passed the 50-year mark
72 of the 178 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 29.8% 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 43.7% of the county's Poor-condition bridge traffic
MO 15 S over MID FK SALT RVR, built 1985, carries 2,279 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 26-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 5,217 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Monroe County's bridges were built
178 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s
1910–1919
12 bridges
- 1920s
1920–1929
11 bridges
- 1930s
1930–1939
18 bridges
- 1940s 2
1940–1949
2 bridges
- 1950s 8
1950–1959
8 bridges
- 1960s
1960–1969
18 bridges
- 1970s
1970–1979
16 bridges
- 1980s
1980–1989
19 bridges
- 1990s
1990–1999
27 bridges
- 2000s
2000–2009
26 bridges
- 2010s
2010–2019
16 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 1990s, when 27 of the county's bridges still in the inventory were built, which is 15.2% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1974, 5 years older than the Missouri average of 1979.
How Monroe County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Monroe County in number of bridges, with their condition splits. Its 14.6% Poor share is the 4th-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1977 is in line with the group.
Showing the 5 closest of 114 Missouri counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Livingston County | 185 | 34.1% | 50.3% | 15.7% | 1978 |
| Polk County | 185 | 31.9% | 47.6% | 20.5% | 1966 |
| Ray County | 185 | 36.2% | 51.4% | 12.4% | 1977 |
| Scott County | 182 | 39.6% | 53.8% | 6.6% | 1978 |
| Clark County | 178 | 38.2% | 53.9% | 7.9% | 1986 |
| Monroe County (this page) | 178 | 29.8% | 55.6% | 14.6% | 1974 |
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 Monroe 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 Monroe County, both outside Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (178 bridges here).
- Allen County, LA · 178 bridges
- Webster County, MS · 178 bridges
- Ontario County, NY · 178 bridges
- Moore County, NC · 178 bridges
Similar average build year
Nearest mean year-built outside MO (1974 here).
- Knox County, TN · avg 1974 · 588 bridges
- Summit County, OH · avg 1974 · 563 bridges
- Onondaga County, NY · avg 1974 · 472 bridges
- Orange County, NY · avg 1974 · 472 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (99)
COUNTY RD 326
FairOver: BRANCH
S 16 T 55 N R 9 W, Monroe, MO
Built 1940 Load: 3.6 t ADT: 15
COUNTY RD 1039
FairOver: MILLIGAN CR
S 5 T 53 N R 12 W, Monroe, MO
Built 1976 Load: 5.4 t ADT: 50
COUNTY RD 239
FairOver: OTTER CR
S 19 T 55 N R 10 W, Monroe, MO
Built 1930 Load: 7.2 t ADT: 50
COUNTY RD 1023
FairOver: MILLIGAN CR
S 17 T 53 N R 12 W, Monroe, MO
Built 1979 Load: 8.1 t ADT: 50
COUNTY RD 1119
FairOver: MUD CR
S 30 T 55 N R 12 W, Monroe, MO
Built 1979 Load: 9.9 t ADT: 20
COUNTY RD 1159
FairOver: MUD CR
S 21 T 55 N R 12 W, Monroe, MO
Built 1925 Load: 9.9 t ADT: 15
COUNTY RD 141
FairOver: MID FK OF SALT RVR
S 29 T 55 N R 11 W, Monroe, MO
Built 1920 Load: 9.9 t ADT: 20
COUNTY RD 130
FairOver: CREEK
S 33 T 55 N R 11 W, Monroe, MO
Built 1935 Load: 9.9 t ADT: 20
COUNTY RD 182
FairOver: BRANCH
S 32 T 56 N R 11 W, Monroe, MO
Built 1988 Load: 9.9 t ADT: 20
COUNTY RD 139
FairOver: OTTER CR
S 31 T 56 N R 11 W, Monroe, MO
Built 1920 Load: 9.9 t ADT: 35
COUNTY RD 1175
FairOver: BRANCH
S 3 T 55 N R 12 W, Monroe, MO
Built 1935 Load: 10.8 t ADT: 15
RT E S
FairOver: IVY BR
S 21 T 54 N R 8 W, Monroe, MO
Built 1950 Load: 11.7 t ADT: 109
COUNTY RD 217
FairOver: OTTER CR
S 14 T 55 N R 11 W, Monroe, MO
Built 1988 Load: 12.6 t ADT: 75
COUNTY RD 759
FairOver: LONG BR
S 28 T 53 N R 9 W, Monroe, MO
Built 1920 Load: 13.5 t ADT: 35
COUNTY RD 233
FairOver: CROOKED CR
S 30 T 56 N R 10 W, Monroe, MO
Built 1923 Load: 13.5 t ADT: 50
COUNTY RD 119
FairOver: BRANCH
S 30 T 56 N R 11 W, Monroe, MO
Built 1940 Load: 13.5 t ADT: 25
COUNTY RD 819
FairOver: BEE CR
S 7 T 53 N R 10 W, Monroe, MO
Built 1988 Load: 14.4 t ADT: 75
RT AA E
FairOver: ELK FK SALT RVR
S 29 T 54 N R 11 W, Monroe, MO
Built 1965 Load: 14.4 t ADT: 146
COUNTY RD 840
FairOver: BRANCH
S 5 T 53 N R 10 W, Monroe, MO
Built 1930 Load: 16.2 t ADT: 15
COUNTY RD 141
FairOver: BR MID FK SALT RVR
S 29 T 55 N R 11 W, Monroe, MO
Built 1958 Load: 16.2 t ADT: 20
COUNTY RD 343
FairOver: BRANCH
S 27 T 56 N R 9 W, Monroe, MO
Built 1987 Load: 16.2 t ADT: 15
COUNTY RD 239
FairOver: BRANCH
S 17 T 56 N R 10 W, Monroe, MO
Built 1987 Load: 16.2 t ADT: 20
COUNTY RD 670
FairOver: BURBRIDGE CR
S 25 T 54 N R 8 W, Monroe, MO
Built 1995 Load: 17.1 t ADT: 35
COUNTY RD 621
FairOver: BRUSH CR
S 31 T 54 N R 8 W, Monroe, MO
Built 1981 Load: 17.1 t ADT: 35
COUNTY RD 311
FairOver: CROOKED CR
S 2 T 55 N R 10 W, Monroe, MO
Built 1988 Load: 17.1 t ADT: 50
COUNTY RD 130
FairOver: BRANCH
S 29 T 55 N R 11 W, Monroe, MO
Built 2006 Load: 17.1 t ADT: 25
RT C S
FairOver: ELK FK SALT RVR
S 25 T 54 N R 11 W, Monroe, MO
Built 1968 Load: 18.0 t ADT: 129
RT A S
FairOver: MID FK SALT RVR
S 27 T 55 N R 11 W, Monroe, MO
Built 1964 Load: 20.7 t ADT: 304
COUNTY RD 317
FairOver: BRUSH CR
S 24 T 56 N R 10 W, Monroe, MO
Built 1987 Load: 21.6 t ADT: 35
COUNTY RD 857
FairOver: BRANCH
S 17 T 54 N R 10 W, Monroe, MO
Built 2014 Load: 21.6 t ADT: 50
RT Y S
FairOver: BR REESE FK
S 28 T 53 N R 12 W, Monroe, MO
Built 1958 Load: 21.6 t ADT: 185
COUNTY RD 1137
FairOver: FLAT CR
S 3 T 54 N R 12 W, Monroe, MO
Built 1986 Load: 22.5 t ADT: 35
COUNTY RD 323
FairOver: BRUSH CR
S 19 T 56 N R 9 W, Monroe, MO
Built 1952 Load: 22.5 t ADT: 20
MO 107 S
FairOver: N FK SALT RVR
S 33 T 55 N R 8 W, Monroe, MO
Built 1977 Load: 22.5 t ADT: 372
MO 15 S
FairOver: CROOKED CR
S 32 T 56 N R 10 W, Monroe, MO
Built 1985 Load: 22.5 t ADT: 849
US 24 E
FairOver: OTTER CR
S 22 T 55 N R 9 W, Monroe, MO
Built 1977 Load: 23.4 t ADT: 1,911
MO 151 S
FairOver: SMALL CR
S 11 T 53 N R 12 W, Monroe, MO
Built 1933 Load: 23.4 t ADT: 463
RT A S
FairOver: LIT OTTER CR
S 15 T 55 N R 11 W, Monroe, MO
Built 1933 Load: 23.4 t ADT: 203
RT M E
FairOver: BEE BR
S 18 T 53 N R 11 W, Monroe, MO
Built 1938 Load: 23.4 t ADT: 170
COUNTY RD 1073
FairOver: ELK FK SALT RVR
S 27 T 54 N R 12 W, Monroe, MO
Built 1994 Load: 25.2 t ADT: 30
MO 154 E
FairOver: ELK FK SALT RVR
S 22 T 54 N R 9 W, Monroe, MO
Built 1976 Load: 25.2 t ADT: 1,839
MO 154 E
FairOver: S FK SALT RVR
S 17 T 54 N R 8 W, Monroe, MO
Built 1976 Load: 25.2 t ADT: 1,286
MO 107 S
FairOver: S FK SALT RVR
S 9 T 54 N R 8 W, Monroe, MO
Built 1977 Load: 25.2 t ADT: 373
RT E S
FairOver: BEAR BR
S 10 T 53 N R 8 W, Monroe, MO
Built 1950 Load: 25.2 t ADT: 109
RT E S
FairOver: VAUGHN HOLLOW BR
S 34 T 54 N R 8 W, Monroe, MO
Built 1950 Load: 27.0 t ADT: 109
COUNTY RD 835
FairOver: BEE CR
S 5 T 53 N R 10 W, Monroe, MO
Built 1999 Load: 27.9 t ADT: 20
MO 154 E
FairOver: IVY BR
S 15 T 54 N R 8 W, Monroe, MO
Built 1930 Load: 27.9 t ADT: 1,016
US 24 E
FairOver: N FK SALT RVR
S 14 T 55 N R 9 W, Monroe, MO
Built 1977 Load: 29.7 t ADT: 1,911
MO 154 E
FairOver: IVY BR
S 15 T 54 N R 8 W, Monroe, MO
Built 1930 Load: 29.7 t ADT: 1,016
RT EE S
FairOver: INDIAN CR
S 28 T 56 N R 8 W, Monroe, MO
Built 1962 Load: 29.7 t ADT: 224
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.