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)
US 36 W
FairOver: MID FK SALT RVR
S 7 T 57 N R 13 W, Macon, MO
Built 1971 Load: 27.0 t ADT: 5,783
NEST AVE
FairOver: TRIB OF TEN MILE C
S 16 T 58 N R 13 W, Macon, MO
Built 1994 Load: 27.0 t ADT: 25
RT Y E
FairOver: HOOVER CR
S 19 T 56 N R 13 W, Macon, MO
Built 1947 Load: 27.0 t ADT: 461
DOLPHIN AVE
FairOver: UNNAMED STR
S 32 T 59 N R 16 W, Macon, MO
Built 1991 Load: 27.9 t ADT: 15
FIREFLY ST
FairOver: STINKING CR
S 12 T 56 N R 16 W, Macon, MO
Built 1987 Load: 27.9 t ADT: 10
RT HH S
FairOver: HUCKBY CR
S 11 T 59 N R 16 W, Macon, MO
Built 1960 Load: 27.9 t ADT: 49
MO 149 S
FairOver: STR
S 31 T 59 N R 16 W, Macon, MO
Built 1932 Load: 27.9 t ADT: 279
MUSTANG ST
FairOver: BEAR CR
S 30 T 60 N R 13 W, Macon, MO
Built 1991 Load: 28.8 t ADT: 25
JET RD
FairOver: E FK CHARITON RVR
S 19 T 57 N R 14 W, Macon, MO
Built 1994 Load: 28.8 t ADT: 40
LARIAT AVE
FairOver: BRUSH CR
S 12 T 57 N R 14 W, Macon, MO
Built 1991 Load: 28.8 t ADT: 75
NICOLLET RD
FairOver: UNNAMED STR
S 10 T 58 N R 13 W, Macon, MO
Built 1989 Load: 29.7 t ADT: 15
ORBIT RD
FairOver: TEN MILE CR
S 23 T 58 N R 13 W, Macon, MO
Built 2004 Load: 29.7 t ADT: 25
MO 3 S
FairOver: BNSF RR
S 7 T 57 N R 15 W, Macon, MO
Built 1936 Load: 29.7 t ADT: 298
MO 149 S
FairOver: PAINTER CR
S 18 T 58 N R 16 W, Macon, MO
Built 1932 Load: 29.7 t ADT: 279
GREYHOUND ST
FairOver: SINKING CR
S 36 T 57 N R 16 W, Macon, MO
Built 1988 Load: 31.5 t ADT: 35
KOALA AVE
FairOver: UNNAMED STR
S 16 T 59 N R 14 W, Macon, MO
Built 2004 Load: 31.5 t ADT: 25
LANTERN ST
FairOver: BEAR CR
S 1 T 60 N R 14 W, Macon, MO
Built 1992 Load: 32.4 t ADT: 20
WENTZ ST
FairOver: BNSF RR
S 21 T 57 N R 14 W, Macon, MO
Built 1991 Load: 32.4 t ADT: 250
HORNET ST
FairOver: MID FK CHARITON RV
S 28 T 59 N R 15 W, Macon, MO
Built 1994 Load: 32.4 t ADT: 20
ECHO AVE (321)
FairOver: WARD BR
S 15 T 58 N R 16 W, Macon, MO
Built 1998 Load: 32.4 t ADT: 40
APOLLO ST
FairOver: MUSSEL CR
S 29 T 59 N R 17 W, Macon, MO
Built 1987 Load: 32.4 t ADT: 20
OWATANNA ST
FairOver: MID FK SALT RVR
S 25 T 56 N R 13 W, Macon, MO
Built 1991 Load: 32.4 t ADT: 35
ONYX AVE
FairOver: MID FK SALT RVR
S 26 T 56 N R 13 W, Macon, MO
Built 1987 Load: 32.4 t ADT: 100
MO 3 S
FairOver: STINKING CR
S 2 T 56 N R 16 W, Macon, MO
Built 1972 Load: 32.4 t ADT: 484
NEPTUNE RD
FairOver: UNNAMED STR
S 16 T 60 N R 13 W, Macon, MO
Built 2000 Load: 32.4 t ADT: 10
FLAGPOLE AVE
FairOver: UNNAMED STR
S 12 T 60 N R 16 W, Macon, MO
Built 1991 Load: 33.3 t ADT: 25
HAWK AVE
FairOver: UNNAMED BR
S 34 T 57 N R 15 W, Macon, MO
Built 1995 Load: 33.3 t ADT: 35
VINE ST
FairOver: WINN BR
S 16 T 57 N R 13 W, Macon, MO
Built 1994 Load: 33.3 t ADT: 20
DELTA ST.
FairOver: WALNUT CR
S 20 T 60 N R 16 W, Macon, MO
Built 2002 Load: 33.3 t ADT: 40
CO HICKORY ST TO O
FairOver: US 36
S 13 T 57 N R 15 W, Macon, MO
Built 1994 Load: 33.3 t ADT: 110
RT F S
FairOver: ARCH BR
S 30 T 59 N R 16 W, Macon, MO
Built 1960 Load: 33.3 t ADT: 81
KETTLE ST
FairOver: UNNAMED STR
S 3 T 58 N R 14 W, Macon, MO
Built 1989 Load: 34.2 t ADT: 15
LACQUER AVE
FairOver: UNNAMED CR
S 23 T 57 N R 14 W, Macon, MO
Built 1989 Load: 34.2 t ADT: 35
LAKE ST
FairOver: UNNAMED STR
S 3 T 57 N R 14 W, Macon, MO
Built 1995 Load: 34.2 t ADT: 35
ARMADA ST
FairOver: BRUSH CR
S 21 T 57 N R 17 W, Macon, MO
Built 2004 Load: 34.2 t ADT: 40
DOLPHIN AVE
FairOver: UNNAMED BR
S 8 T 58 N R 16 W, Macon, MO
Built 1991 Load: 35.1 t ADT: 25
GRISTMILL ST
FairOver: SWEEZER CR
S 17 T 58 N R 15 W, Macon, MO
Built 1989 Load: 35.1 t ADT: 35
OTTER AVE
FairOver: TRIB MID FK SALT R
S 13 T 56 N R 13 W, Macon, MO
Built 2001 Load: 35.1 t ADT: 5
EMERALD ST
FairOver: CHARITON RVR
S 28 T 59 N R 16 W, Macon, MO
Built 2012 Load: 35.1 t ADT: 50
BRONCO ST
FairOver: LITTLE BRUSH CR
S 22 T 58 N R 17 W, Macon, MO
Built 2014 Load: 35.1 t ADT: 10
BADGER ST
FairOver: LIT BUSH CR
S 3 T 57 N R 17 W, Macon, MO
Built 1997 Load: 36.0 t ADT: 40
DAIRY AVE
FairOver: BR OF WALNUT CR
S 29 T 60 N R 16 W, Macon, MO
Built 1989 Load: 36.9 t ADT: 15
MARINER ST
FairOver: MID FK SALT RVR
S 15 T 59 N R 14 W, Macon, MO
Built 1999 Load: 36.9 t ADT: 25
OXFORD ST
FairOver: UNNAMED BR
S 36 T 57 N R 13 W, Macon, MO
Built 1991 Load: 37.8 t ADT: 35
MO 156 E
FairOver: E FK CHARITON RVR
S 11 T 60 N R 15 W, Macon, MO
Built 2016 Load: 38.7 t ADT: 602
US 36 E
FairOver: WINN CR
S 9 T 57 N R 13 W, Macon, MO
Built 1925 Load: 38.7 t ADT: 11,380
RUBEY ST
FairOver: BNSF RR OAK ST
S 10 T 57 N R 14 W, Macon, MO
Built 1984 Load: 40.5 t ADT: 250
US 36 W
FairOver: MID FK CHARITON RV
S 8 T 57 N R 15 W, Macon, MO
Built 1956 Load: 40.5 t ADT: 5,248
DIAMOND AVE.
FairOver: UNNAMED STR
S 30 T 59 N R 16 W, Macon, MO
Built 1987 Load: 41.4 t ADT: 15
FOUNTAIN ST
FairOver: TRIB OF CHARITON R
S 36 T 60 N R 16 W, Macon, MO
Built 1990 Load: 42.3 t ADT: 35
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.