Total bridges
291
Public highway bridges in Macon County
County profile · official public datasets
Macon County, MO
291 public highway bridges tracked in the FHWA National Bridge Inventory: 42.6% rated Good, 49.8% Fair, 7.6% Poor.
- 291
- Public bridges
- 42.6%
- Good condition
- 7.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Macon County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 40%
- lowest Poor share in state
- 7.6%
- Poor-condition share
- 291
- public highway bridges
- 1986
- 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.
Macon County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Macon County ranks #46 of 115 Missouri counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.6%). Macon County, Missouri contains 291 public highway bridges. Roughly 42.6% are rated “Good,” 49.8% “Fair,” and 7.6% “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
42.6%
124 of 291 rated 7-9
Fair condition
49.8%
145 of 291 rated 5-6
Poor condition
7.6%
22 of 291 rated 4 or below
In-state Poor-share rank
#46 of 115
Among Missouri counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 291 NBI-tracked bridges by lowest applicable component rating.
Good 42.6% (124)
Fair 49.8% (145)
Poor 7.6% (22)
Macon County's Poor-condition bridges carry 15,083 vehicle crossings a day
That is 6.9% of the county's reported daily bridge traffic on 7.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 686 crossings a day against 650 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 291 of 291 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
24.7% of Macon County's bridges have passed the 50-year mark
72 of the 291 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 42.6% 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 83.4% of the county's Poor-condition bridge traffic
US 63 S over US 36, built 1971, carries 12,582 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 22-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 15,083 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Macon County's bridges were built
291 bridges with a recorded construction year, grouped by decade
- 1920s 10
1920–1929
10 bridges
- 1930s 15
1930–1939
15 bridges
- 1940s 9
1940–1949
9 bridges
- 1950s 16
1950–1959
16 bridges
- 1960s 16
1960–1969
16 bridges
- 1970s 8
1970–1979
8 bridges
- 1980s
1980–1989
44 bridges
- 1990s
1990–1999
79 bridges
- 2000s
2000–2009
62 bridges
- 2010s 28
2010–2019
28 bridges
- 2020s 4
2020–2029
4 bridges
What this shows Construction peaked in the 1990s, when 79 of the county's bridges still in the inventory were built, which is 27.1% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1986, 7 years newer than the Missouri average of 1979.
How Macon County compares with Missouri's closest counties by inventory size
The 5 Missouri counties nearest Macon County in number of bridges, with their condition splits. Its 7.6% Poor share is the 5th-lowest of these 6. Its average build year of 1986 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 |
|---|---|---|---|---|---|
| Adair County | 301 | 60.8% | 32.6% | 6.6% | 1992 |
| Newton County | 300 | 39% | 54.3% | 6.7% | 1978 |
| Macon County (this page) | 291 | 42.6% | 49.8% | 7.6% | 1986 |
| Chariton County | 288 | 53.5% | 35.1% | 11.5% | 1976 |
| Platte County | 285 | 38.9% | 55.1% | 6% | 1985 |
| New Madrid County | 282 | 53.2% | 44.7% | 2.1% | 1986 |
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 Macon 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 Macon County, both outside Missouri so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MO (291 bridges here).
- Scott County, IA · 291 bridges
- Pickens County, SC · 291 bridges
- Canyon County, ID · 292 bridges
- Hancock County, IL · 292 bridges
Similar average build year
Nearest mean year-built outside MO (1986 here).
- El Paso County, TX · avg 1986 · 783 bridges
- Caddo County, LA · avg 1986 · 682 bridges
- Weld County, CO · avg 1986 · 614 bridges
- Polk County, IA · avg 1986 · 545 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (145)
DECOY ST
FairOver: UNNAMED CR
S 30 T 57 N R 16 W, Macon, MO
Built 1991 Load: 42.3 t ADT: 35
RT T E
FairOver: E FK CHARITON RVR
S 24 T 56 N R 15 W, Macon, MO
Built 1998 Load: 43.2 t ADT: 480
US 36 W
FairOver: CHARITON RVR
S 9 T 51 N R 16 W, Macon, MO
Built 2003 Load: 43.2 t ADT: 5,802
BISON ST
FairOver: LIT BRUSH CR
S 10 T 58 N R 17 W, Macon, MO
Built 2011 Load: 43.2 t ADT: 35
US 36 E
FairOver: HICKORY BR
S 9 T 57 N R 17 W, Macon, MO
Built 1951 Load: 43.2 t ADT: 8,962
US 36 E
FairOver: SAND BR
S 11 T 57 N R 16 W, Macon, MO
Built 1956 Load: 43.2 t ADT: 3,829
ALPHA ST
FairOver: MUSSEL FK
S 30 T 60 N R 17 W, Macon, MO
Built 1999 Load: 44.1 t ADT: 5
DOMINO ST
FairOver: WALNUT CR
S 29 T 60 N R 16 W, Macon, MO
Built 1999 Load: 44.1 t ADT: 20
US 63 S
FairOver: BNSF RR
S 21 T 57 N R 14 W, Macon, MO
Built 1985 Load: 44.1 t ADT: 11,335
MAHOGANY ST
FairOver: UNNAMED CR
S 7 T 56 N R 13 W, Macon, MO
Built 1992 Load: 45.9 t ADT: 20
US 36 W
FairOver: MUSSEL FORK CR
S 7 T 57 N R 17 W, Macon, MO
Built 2004 Load: 45.9 t ADT: 3,232
RT T E
FairOver: MID FK CHARITON RV
S 30 T 56 N R 15 W, Macon, MO
Built 1961 Load: 45.9 t ADT: 362
VINE ST
FairOver: UNNAMED BR
S 24 T 57 N R 14 W, Macon, MO
Built 1995 Load: 46.8 t ADT: 100
ALPINE AVE
FairOver: TRIB TO MUSSEL FK
S 27 T 59 N R 17 W, Macon, MO
Built 2000 Load: 48.6 t ADT: 10
LYNX AVE
FairOver: UNNAMED STR
S 27 T 58 N R 14 W, Macon, MO
Built 1991 Load: 48.6 t ADT: 35
INKWELL ST
FairOver: LICK BR
S 26 T 59 N R 15 W, Macon, MO
Built 2000 Load: 48.6 t ADT: 25
US 36 W
FairOver: PUZZLE CR
S 12 T 57 N R 17 W, Macon, MO
Built 1924 Load: 49.5 t ADT: 9,101
OMEGA ST
FairOver: UNNAMED BR
S 24 T 56 N R 13 W, Macon, MO
Built 1987 Load: 50.4 t ADT: 35
IRIS ST
FairOver: UNNAMED STR
S 22 T 60 N R 15 W, Macon, MO
Built 2003 Load: 51.3 t ADT: 20
MO 156 E
FairOver: LONG BR
S 7 T 60 N R 14 W, Macon, MO
Built 1987 Load: 51.3 t ADT: 602
MAHOGANY ST
FairOver: UNNAMED BR
S 7 T 56 N R 13 W, Macon, MO
Built 1992 Load: 52.2 t ADT: 20
US 36 E
FairOver: E FK CHARITON RVR
S 18 T 57 N R 14 W, Macon, MO
Built 1984 Load: 52.2 t ADT: 11,107
RT C S
FairOver: SULPHUR CR
S 15 T 57 N R 15 W, Macon, MO
Built 1964 Load: 52.2 t ADT: 891
LANDMARK ST
FairOver: UNNAMED STR
S 11 T 59 N R 14 W, Macon, MO
Built 1991 Load: 54.0 t ADT: 35
MARSHALL RD
FairOver: E FK CHARITON RVR
S 30 T 58 N R 17 W, Macon, MO
Built 1997 Load: 54.0 t ADT: 35
FORBES RD
FairOver: TRIB CHARITON RVR
S 24 T 59 N R 16 W, Macon, MO
Built 2001 Load: 54.0 t ADT: 5
NIGHTINGALE RD
FairOver: BEAR CR
S 15 T 59 N R 13 W, Macon, MO
Built 1991 Load: 54.9 t ADT: 20
HICKORY ST
FairOver: MID FK CHARITON RV
S 8 T 57 N R 15 W, Macon, MO
Built 1997 Load: 54.9 t ADT: 90
AMBER PLACE
FairOver: UNNAMED CREEK
S 30 T 59 N R 17 W, Macon, MO
Built 2007 Load: 54.9 t ADT: 5
US 36 E
FairOver: DUCK CR
S 17 T 57 N R 14 W, Macon, MO
Built 1924 Load: 54.9 t ADT: 10,225
COPPER ST.
FairOver: TRIB TO WALNUT CR
S 2 T 60 N R 17 W, Macon, MO
Built 2007 Load: 55.8 t ADT: 15
LANDMARK ST
FairOver: TRIB TO BEAR CR
S 7 T 59 N R 13 W, Macon, MO
Built 1998 Load: 61.2 t ADT: 30
US 36 E
FairOver: STINKING CR
S 7 T 57 N R 15 W, Macon, MO
Built 1956 Load: 61.2 t ADT: 9,069
KENNEDY ST
FairOver: MID FK SALT RVR
S 2 T 58 N R 14 W, Macon, MO
Built 1998 Load: 64.8 t ADT: 20
BIG HORN ST
FairOver: BR OF LIT BRUSH CR
S 11 T 59 N R 17 W, Macon, MO
Built 2005 Load: 64.8 t ADT: 15
MARINER ST
FairOver: MID FK SALT RVR
S 23 T 59 N R 14 W, Macon, MO
Built 1999 Load: 66.6 t ADT: 25
OLYMPIC AVE
FairOver: TEN MILE CR
S 24 T 58 N R 13 W, Macon, MO
Built 1989 Load: 66.6 t ADT: 25
KELLOGG AVE
FairOver: BR MID FK SALT RVR
S 34 T 58 N R 14 W, Macon, MO
Built 1997 Load: 72.0 t ADT: 40
HERON ST
FairOver: UNNAMED BR
S 9 T 56 N R 15 W, Macon, MO
Built 1989 Load: 74.7 t ADT: 15
AURORA ST
FairOver: UNNAMED BR
S 20 T 59 N R 17 W, Macon, MO
Built 1989 Load: 78.3 t ADT: 25
JAGUAR ST
FairOver: E FK CHARITON RVR
S 29 T 57 N R 14 W, Macon, MO
Built 1960 Load: 81.0 t ADT: 35
MENDOTA ST
FairOver: BILLY BR
S 31 T 59 N R 13 W, Macon, MO
Built 1997 Load: 81.9 t ADT: 20
FLEETWOOD ST
FairOver: STINKING CR
S 1 T 56 N R 16 W, Macon, MO
Built 1993 Load: 85.5 t ADT: 25
COYOTE RD
FairOver: UNNAMED STR
S 24 T 57 N R 17 W, Macon, MO
Built 1998 Load: 99.9 t ADT: 10
US 36 E
FairOver: BRUSH CR
S 12 T 57 N R 14 W, Macon, MO
Built 2007 Load: 99.9 t ADT: 3,797
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.