Total bridges
120
Public highway bridges in Perry County
County profile · official public datasets
Perry County, MO
120 public highway bridges tracked in the FHWA National Bridge Inventory: 27.5% rated Good, 55% Fair, 17.5% Poor.
- 120
- Public bridges
- 27.5%
- Good condition
- 17.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Perry 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.
- 102nd
- of 115 on Poor share
- 17.5%
- Poor-condition share
- 120
- public highway bridges
- 1965
- 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.
Perry County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Perry County ranks #102 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 17.5%). Perry County, Missouri contains 120 public highway bridges. Roughly 27.5% are rated “Good,” 55% “Fair,” and 17.5% “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
27.5%
33 of 120 rated 7-9
Fair condition
55%
66 of 120 rated 5-6
Poor condition
17.5%
21 of 120 rated 4 or below
In-state Poor-share rank
#102 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 120 NBI-tracked bridges by lowest applicable component rating.
Good 27.5% (33)
Fair 55% (66)
Poor 17.5% (21)
Perry County's Poor-condition bridges carry 35,321 vehicle crossings a day
That is 25.8% of the county's reported daily bridge traffic on 17.5% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 1,682 crossings a day against 1,431 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 120 of 120 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
70% of Perry County's bridges have passed the 50-year mark
84 of the 120 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 27.5% 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 38% of the county's Poor-condition bridge traffic
MO 51 S over IS 55, built 1970, carries 13,435 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 21-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 35,321 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Perry County's bridges were built
120 bridges with a recorded construction year, grouped by decade
- 1900s 3
1900–1909
3 bridges
- 1910s 2
1910–1919
2 bridges
- 1920s 4
1920–1929
4 bridges
- 1930s
1930–1939
16 bridges
- 1940s
1940–1949
13 bridges
- 1950s
1950–1959
18 bridges
- 1960s
1960–1969
11 bridges
- 1970s
1970–1979
18 bridges
- 1980s 5
1980–1989
5 bridges
- 1990s
1990–1999
9 bridges
- 2000s
2000–2009
8 bridges
- 2010s 7
2010–2019
7 bridges
- 2020s 6
2020–2029
6 bridges
What this shows Construction peaked in the 1950s, when 18 of the county's bridges still in the inventory were built, which is 15% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1965, 14 years older than the Missouri average of 1979.
How Perry County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Perry County in number of bridges, with their condition splits. Its 17.5% Poor share is the 5th-lowest of these 6. Its average build year of 1965 against a peer-group mean of 1975 is 10 years older.
Showing the 5 closest of 114 Missouri counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Christian County | 121 | 41.3% | 51.2% | 7.4% | 1978 |
| Schuyler County | 120 | 65.8% | 30.8% | 3.3% | 1989 |
| Perry County (this page) | 120 | 27.5% | 55% | 17.5% | 1965 |
| Laclede County | 119 | 31.1% | 58.8% | 10.1% | 1971 |
| Crawford County | 118 | 28.8% | 63.6% | 7.6% | 1970 |
| Madison County | 118 | 33.1% | 47.5% | 19.5% | 1965 |
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 Perry 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 Perry County, both outside Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (120 bridges here).
- Matanuska-Susitna County, AK · 120 bridges
- Indian River County, FL · 120 bridges
- Sanders County, MT · 120 bridges
- Chaves County, NM · 120 bridges
Similar average build year
Nearest mean year-built outside MO (1965 here).
- Windsor County, VT · avg 1965 · 483 bridges
- Bedford County, PA · avg 1965 · 417 bridges
- Crawford County, PA · avg 1965 · 399 bridges
- Harper County, KS · avg 1965 · 372 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (120)
COUNTY RD 422
PoorOver: BR OF INDIAN CR
S 1243 T 34 N R 12 E, Perry, MO
Built 1940 Load: 6.3 t ADT: 35
RT O E
PoorOver: APPLE CR
S 29 T 34 N R 11 E, Perry, MO
Built 1958 Load: 9.0 t ADT: 382
RT E S
PoorOver: BOIS BRULE CR
S 66 T 36 N R 12 E, Perry, MO
Built 1958 Load: 9.0 t ADT: 17
RT T E
PoorOver: SALINE CR
S 36 T 35 N R 9 E, Perry, MO
Built 1933 Load: 9.0 t ADT: 1,248
COUNTY RD 418
PoorOver: BRAZEAU CR
S 13 T 34 N R 12 E, Perry, MO
Built 1933 Load: 11.7 t ADT: 35
RT NN E
PoorOver: SALINE CR
S 3015 T 36 N R 10 E, Perry, MO
Built 1956 Load: 11.7 t ADT: 364
COUNTY RD 854
PoorOver: TRIB OF S SALINE C
S 35 T 35 N R 9 E, Perry, MO
Built 1905 Load: 12.6 t ADT: 45
COUNTY RD 210
PoorOver: STERILE BR
S 2079 T 36 N R 11 E, Perry, MO
Built 1940 Load: 14.4 t ADT: 35
RT K S
PoorOver: APPLE CR
S 24 T 34 N R 10 E, Perry, MO
Built 1960 Load: 14.4 t ADT: 990
COUNTY RD 422
PoorOver: INDIAN CR
S 26 T 34 N R 12 E, Perry, MO
Built 1937 Load: 16.2 t ADT: 35
RT F E
PoorOver: IS 55
S 27 T 34 N R 11 E, Perry, MO
Built 1970 Load: 16.2 t ADT: 288
RT C S
PoorOver: CINQUEHMS CR
S 1846 T 36 N R 12 E, Perry, MO
Built 1961 Load: 16.2 t ADT: 197
RT B S
PoorOver: IS 55
S 20 T 34 N R 11 E, Perry, MO
Built 1970 Load: 17.1 t ADT: 1,148
RT NN E
PoorOver: IS 55
S 20 T 36 N R 10 E, Perry, MO
Built 1970 Load: 18.0 t ADT: 364
COUNTY RD 540
PoorOver: CREEK
S 33 T 34 N R 11 E, Perry, MO
Built 1940 Load: 22.5 t ADT: 35
MO 51 S
PoorOver: IS 55
S 843 T 35 N R 10 E, Perry, MO
Built 1970 Load: 24.3 t ADT: 13,435
RT T E
PoorOver: IS 55
S 840 T 35 N R 10 E, Perry, MO
Built 1970 Load: 25.2 t ADT: 4,680
MO 51 S
PoorOver: MISSISSIPPI RVR UP RR
S 1007 T 37 N R 11 E, Perry, MO
Built 1942 Load: 25.2 t ADT: 5,959
COUNTY RD 458
PoorOver: CREEK
S 1 T 33 N R 13 E, Perry, MO
Built 1935 Load: 32.4 t ADT: 35
MO 51 S
PoorOver: HORSE ISLAND CHUTE
S 1007 T 37 N R 11 E, Perry, MO
Built 1942 Load: 36.9 t ADT: 5,959
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.