Total bridges
246
Public highway bridges in Buchanan County
County profile · official public datasets
Buchanan County, MO
246 public highway bridges tracked in the FHWA National Bridge Inventory: 34.1% rated Good, 58.1% Fair, 7.7% Poor.
- 246
- Public bridges
- 34.1%
- Good condition
- 7.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Buchanan County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 42%
- lowest Poor share in state
- 7.7%
- Poor-condition share
- 246
- public highway bridges
- 1981
- 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.
Buchanan County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Buchanan County ranks #48 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.7%). Buchanan County, Missouri contains 246 public highway bridges. Roughly 34.1% are rated “Good,” 58.1% “Fair,” and 7.7% “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
34.1%
84 of 246 rated 7-9
Fair condition
58.1%
143 of 246 rated 5-6
Poor condition
7.7%
19 of 246 rated 4 or below
In-state Poor-share rank
#48 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 246 NBI-tracked bridges by lowest applicable component rating.
Good 34.1% (84)
Fair 58.1% (143)
Poor 7.7% (19)
Buchanan County's Poor-condition bridges carry 64,751 vehicle crossings a day
That is 6.7% of the county's reported daily bridge traffic on 7.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 3,408 crossings a day against 1,931 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 246 of 246 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
31.7% of Buchanan County's bridges have passed the 50-year mark
78 of the 246 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 34.1% 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 26.5% of the county's Poor-condition bridge traffic
US 36 E over IS 229 CST 6TH ST IS, built 1951, carries 17,137 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 19-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 64,751 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Buchanan County's bridges were built
246 bridges with a recorded construction year, grouped by decade
- 1900s 3
1900–1909
3 bridges
- 1910s 3
1910–1919
3 bridges
- 1920s 6
1920–1929
6 bridges
- 1930s 4
1930–1939
4 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s
1950–1959
24 bridges
- 1960s
1960–1969
26 bridges
- 1970s
1970–1979
42 bridges
- 1980s
1980–1989
35 bridges
- 1990s
1990–1999
47 bridges
- 2000s
2000–2009
19 bridges
- 2010s
2010–2019
21 bridges
- 2020s 11
2020–2029
11 bridges
What this shows Construction peaked in the 1990s, when 47 of the county's bridges still in the inventory were built, which is 19.1% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1981) matches the Missouri average (1979).
How Buchanan County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Buchanan County in number of bridges, with their condition splits. Its 7.7% Poor share is the 2nd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1983 is in line with the group.
Showing the 5 closest of 114 Missouri counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Gentry County | 246 | 52% | 33.3% | 14.6% | 1992 |
| Buchanan County (this page) | 246 | 34.1% | 58.1% | 7.7% | 1981 |
| Pettis County | 243 | 43.6% | 45.3% | 11.1% | 1975 |
| St. Louis city County | 240 | 31.3% | 58.8% | 10% | 1982 |
| Lafayette County | 238 | 31.9% | 65.5% | 2.5% | 1980 |
| DeKalb County | 237 | 35% | 56.5% | 8.4% | 1985 |
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 Buchanan 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 Buchanan County, both outside Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (246 bridges here).
- Cullman County, AL · 246 bridges
- Piatt County, IL · 246 bridges
- Jackson County, IA · 246 bridges
- Jackson County, KS · 246 bridges
Similar average build year
Nearest mean year-built outside MO (1981 here).
- Franklin County, OH · avg 1981 · 922 bridges
- Greenville County, SC · avg 1981 · 635 bridges
- Montgomery County, OH · avg 1981 · 632 bridges
- McLean County, IL · avg 1981 · 624 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (246)
IS 229 N
FairOver: CST 22ND ST
S 28 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 32.4 t ADT: 4,497
SE SAXTON RD
FairOver: OLD CHNL PLATTE RV
S 27 T 57 N R 34 W, Buchanan, MO
Built 1989 Load: 32.4 t ADT: 150
SE SAXTON RD
FairOver: OLD CHNL PLATTE RV
S 34 T 57 N R 34 W, Buchanan, MO
Built 1989 Load: 32.4 t ADT: 150
SE KEMMER RD
FairOver: THIRD FK PLATTE RV
S 25 T 57 N R 34 W, Buchanan, MO
Built 1989 Load: 32.4 t ADT: 25
HURLINGEN RD
FairOver: BR OF PLATTE RVR
S 4 T 57 N R 34 W, Buchanan, MO
Built 1992 Load: 32.4 t ADT: 40
S.E. 123TH
FairOver: THIRD FK PLATTE RV
S 7 T 57 N R 33 W, Buchanan, MO
Built 1990 Load: 32.4 t ADT: 15
SW LEWIS SCHOOL RD
FairOver: BR OF COVERDALE DT
S 33 T 56 N R 36 W, Buchanan, MO
Built 1989 Load: 32.4 t ADT: 25
SE BENNER LAKE
FairOver: PLUMMER CR
S 28 T 55 N R 34 W, Buchanan, MO
Built 1994 Load: 32.4 t ADT: 20
ROCK CREEK SE
FairOver: ROCK CR
S 32 T 56 N R 34 W, Buchanan, MO
Built 1990 Load: 32.4 t ADT: 15
SE 115TH RD
FairOver: MALDEN CR
S 13 T 55 N R 34 W, Buchanan, MO
Built 1991 Load: 32.4 t ADT: 20
LOVERS LN
FairOver: NORTHWEST PKWY
S 33 T 58 N R 35 W, Buchanan, MO
Built 1929 Load: 32.4 t ADT: 4,500
10TH ST
FairOver: MAPLE LEAF PKWY
S 5 T 57 N R 35 W, Buchanan, MO
Built 1989 Load: 32.4 t ADT: 1,500
6TH ST-US 59
FairOver: BNSF RR
S 20 T 57 N R 35 W, Buchanan, MO
Built 1983 Load: 32.4 t ADT: 23,450
SE RIVERSIDE TERR
FairOver: SMALL CR
S 30 T 57 N R 34 W, Buchanan, MO
Built 1997 Load: 32.4 t ADT: 100
MO 371 S
FairOver: BEE CR
S 10 T 55 N R 35 W, Buchanan, MO
Built 1983 Load: 32.4 t ADT: 1,178
SE HILLYARD RD
FairOver: RILEY BR
S 2 T 56 N R 34 W, Buchanan, MO
Built 2017 Load: 32.4 t ADT: 20
MO 6 E
FairOver: 3RD FK PLATTE RVR
S 8 T 57 N R 33 W, Buchanan, MO
Built 1987 Load: 32.4 t ADT: 1,003
22ND ST N
FairOver: US 36
S 21 T 57 N R 35 W, Buchanan, MO
Built 1961 Load: 32.4 t ADT: 8,401
RT U E
FairOver: CONTRARY CR
S 4 T 56 N R 36 W, Buchanan, MO
Built 1967 Load: 33.3 t ADT: 2,036
IS 229 S
FairOver: US 59
S 8 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 33.3 t ADT: 4,060
RP MO759N TO IS229
FairOver: CST MONTEREY ST BNSF RR
S 17 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 33.3 t ADT: 3,123
US 36 W
FairOver: MO 759 BNSF RR
S 20 T 57 N R 35 W, Buchanan, MO
Built 1985 Load: 33.3 t ADT: 8,499
RP IS229N TO MO759
FairOver: MO 759
S 17 T 57 N R 35 W, Buchanan, MO
Built 1983 Load: 33.3 t ADT: 3,490
US 36 E
FairOver: CST SOUTHWEST PKWY
S 22 T 57 N R 35 W, Buchanan, MO
Built 1961 Load: 33.3 t ADT: 11,343
US 36 W
FairOver: CST SOUTHWEST PKWY
S 22 T 57 N R 35 W, Buchanan, MO
Built 1961 Load: 33.3 t ADT: 11,952
US 169 S
FairOver: IS 29
S 26 T 58 N R 35 W, Buchanan, MO
Built 1962 Load: 33.3 t ADT: 6,230
IS 229 S
FairOver: CST HICKORY ST
S 20 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 34.2 t ADT: 9,862
IS 229 N
FairOver: CST HICKORY ST
S 20 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 34.2 t ADT: 9,086
US 59 N
FairOver: CST 6TH ST
S 17 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 34.2 t ADT: 5,210
RP IS229S TO US36W
FairOver: FILL
S 17 T 57 N R 35 W, Buchanan, MO
Built 1983 Load: 34.2 t ADT: 2,220
AGENCY RD S
FairOver: US 36
S 21 T 57 N R 35 W, Buchanan, MO
Built 1961 Load: 34.2 t ADT: 1,518
IS 29 S
FairOver: BEE CR
S 14 T 55 N R 35 W, Buchanan, MO
Built 1958 Load: 34.2 t ADT: 18,234
IS 29 N
FairOver: BEE CR
S 14 T 55 N R 35 W, Buchanan, MO
Built 1958 Load: 34.2 t ADT: 18,824
MO 6 E
FairOver: IS 29
S 2 T 57 N R 35 W, Buchanan, MO
Built 1958 Load: 35.1 t ADT: 15,423
RP IS229N TO MO759
FairOver: RP TO US 36
S 20 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 35.1 t ADT: 3,959
RP IS229S TO IS29N
FairOver: IS 29
S 35 T 57 N R 35 W, Buchanan, MO
Built 1965 Load: 35.1 t ADT: 3,759
SW BLUFF RD
FairOver: BR OF OLD MUDDY LK
S 28 T 56 N R 36 W, Buchanan, MO
Built 1994 Load: 35.1 t ADT: 25
MO 6 E
FairOver: PLATTE RVR
S 4 T 57 N R 34 W, Buchanan, MO
Built 1986 Load: 35.1 t ADT: 2,540
US 36 E
FairOver: MISSOURI RVR
S 19 T 57 N R 35 W, Buchanan, MO
Built 1983 Load: 35.1 t ADT: 7,009
US 36 W
FairOver: MISSOURI RVR
S 19 T 57 N R 35 W, Buchanan, MO
Built 1983 Load: 35.1 t ADT: 8,227
MO 116 E
FairOver: LIT BEE CR
S 24 T 55 N R 35 W, Buchanan, MO
Built 2012 Load: 35.1 t ADT: 899
RT M S
FairOver: SUGAR CR
S 25 T 55 N R 37 W, Buchanan, MO
Built 2012 Load: 35.1 t ADT: 68
IS 229 S
FairOver: CST HIGHLAND AVE
S 8 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 36.0 t ADT: 2,105
IS 229 N
FairOver: CST HIGHLAND AVE
S 8 T 57 N R 35 W, Buchanan, MO
Built 1979 Load: 36.0 t ADT: 4,469
MO 752 E
FairOver: MO 371
S 33 T 57 N R 35 W, Buchanan, MO
Built 1977 Load: 36.0 t ADT: 11,356
MO 6 E
FairOver: E OVRFL OF THIRD F
S 8 T 57 N R 33 W, Buchanan, MO
Built 1987 Load: 36.0 t ADT: 1,003
US 169 S
FairOver: PLATTE RVR
S 10 T 56 N R 34 W, Buchanan, MO
Built 1988 Load: 36.0 t ADT: 5,953
RT H E
FairOver: JENKINS BR
S 4 T 55 N R 33 W, Buchanan, MO
Built 1948 Load: 36.0 t ADT: 421
RP IS229S TO IS29N
FairOver: IS 229
S 35 T 57 N R 35 W, Buchanan, MO
Built 1965 Load: 36.9 t ADT: 3,759
IS 229 N
FairOver: CST AJAX RD WHITEHEAD C
S 34 T 57 N R 35 W, Buchanan, MO
Built 1965 Load: 37.8 t ADT: 10,814
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.