Total bridges
172
Public highway bridges in Moultrie County
County profile · official public datasets
Moultrie County, IL
172 public highway bridges tracked in the FHWA National Bridge Inventory: 39% rated Good, 51.2% Fair, 9.9% Poor.
- 172
- Public bridges
- 39%
- Good condition
- 9.9%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Moultrie County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- 70th
- of 102 on Poor share
- 9.9%
- Poor-condition share
- 172
- public highway bridges
- 1984
- 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.
Moultrie County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Moultrie County ranks #70 of 102 Illinois counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.9%). Moultrie County, Illinois contains 172 public highway bridges. Roughly 39% are rated “Good,” 51.2% “Fair,” and 9.9% “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
39%
67 of 172 rated 7-9
Fair condition
51.2%
88 of 172 rated 5-6
Poor condition
9.9%
17 of 172 rated 4 or below
In-state Poor-share rank
#70 of 102
Among Illinois counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 172 NBI-tracked bridges by lowest applicable component rating.
Good 39% (67)
Fair 51.2% (88)
Poor 9.9% (17)
Moultrie County's Poor-condition bridges carry 6,025 vehicle crossings a day
That is 4.6% of the county's reported daily bridge traffic on 9.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 354 crossings a day against 651 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 172 of 172 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
29.7% of Moultrie County's bridges have passed the 50-year mark
51 of the 172 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 39% 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 78% of the county's Poor-condition bridge traffic
IL 121 (FAP 320) over WEST OKAW RIVER, built 1966, carries 4,700 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 17-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 6,025 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Moultrie County's bridges were built
172 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 1
1910–1919
1 bridges
- 1920s 1
1920–1929
1 bridges
- 1930s 2
1930–1939
2 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s 15
1950–1959
15 bridges
- 1960s
1960–1969
22 bridges
- 1970s
1970–1979
16 bridges
- 1980s
1980–1989
39 bridges
- 1990s
1990–1999
38 bridges
- 2000s
2000–2009
17 bridges
- 2010s
2010–2019
16 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1980s, when 39 of the county's bridges still in the inventory were built, which is 22.7% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1984, 5 years newer than the Illinois average of 1979.
How Moultrie County compares with Illinois's closest counties by inventory size
The 5 Illinois counties nearest Moultrie County in number of bridges, with their condition splits. Its 9.9% Poor share is the 4th-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1982 is in line with the group.
Showing the 5 closest of 101 Illinois counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Jasper County | 181 | 70.7% | 24.3% | 5% | 1982 |
| Carroll County | 179 | 37.4% | 52% | 10.6% | 1979 |
| Moultrie County (this page) | 172 | 39% | 51.2% | 9.9% | 1984 |
| Cumberland County | 169 | 54.4% | 39.1% | 6.5% | 1979 |
| Clay County | 166 | 49.4% | 37.3% | 13.3% | 1982 |
| Hamilton County | 165 | 80% | 17.6% | 2.4% | 1989 |
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 Moultrie 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 Moultrie County, both outside Illinois so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside IL (172 bridges here).
- Colbert County, AL · 172 bridges
- Marshall County, AL · 172 bridges
- Newton County, IN · 172 bridges
- Pike County, IN · 172 bridges
Similar average build year
Nearest mean year-built outside IL (1984 here).
- Hennepin County, MN · avg 1984 · 936 bridges
- Duval County, FL · avg 1984 · 831 bridges
- El Paso County, CO · avg 1984 · 686 bridges
- Bell County, TX · avg 1984 · 660 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (17)
TR 107
PoorOver: WILBORN CREEK
4.3 MI SW BETHANY, Moultrie, IL
Built 1956 Load: 4.5 t ADT: 25
TR 71
PoorOver: MARROWBONE CREEK
1.9 MI NW BETHANY, Moultrie, IL
Built 1966 Load: 8.7 t ADT: 100
TR 17A (CR 2300N)
PoorOver: Jonathan Creek
1280E CR 2300N, Moultrie, IL
Built 1992 Load: 12.6 t ADT: 35
IL 121 (FAP 320)
PoorOver: WEST OKAW RIVER
SE OF BETHANY, Moultrie, IL
Built 1966 Load: 18.8 t ADT: 4,700
CH 14
PoorOver: MARROW BONE CREEK
1 MI W OF BETHANY, Moultrie, IL
Built 1962 Load: 19.4 t ADT: 150
TR 39 (CR 2000N)
PoorOver: W Okaw River Trib
1150E CR 2000N, Moultrie, IL
Built 1995 Load: 19.4 t ADT: 20
TR 35 (CR 2050N)
PoorOver: Jonathan Branch
1190E CR 2050N, Moultrie, IL
Built 1992 Load: 19.4 t ADT: 20
TR 142
PoorOver: WHITLEY CREEK
2.5 MI E OF BRUCE, Moultrie, IL
Built 1917 Load: 19.4 t ADT: 100
TR 38
PoorOver: STRINGTOWN BRANCH
3.5 MI W LOVINGTON, Moultrie, IL
Built 1930 Load: 20.7 t ADT: 50
TR 3 (CR 2500N)
PoorOver: Stringtown Branch
560E CR 2500N, Moultrie, IL
Built 1993 Load: 21.1 t ADT: 50
TR 93A
PoorOver: TWO MILE BRANCH
2 MI N SULLIVAN, Moultrie, IL
Built 1965 Load: 26.2 t ADT: 25
TR 19 A
PoorOver: W OKAW RIVER
1.7 MI W LOVINGTON, Moultrie, IL
Built 1977 Load: 27.9 t ADT: 100
TR 142 A
PoorOver: LYNN CREEK
4 MI NW OF GAUS, Moultrie, IL
Built 1956 Load: 28.2 t ADT: 100
TR 5
PoorOver: DRAINAGE DITCH
3.5 MI W OF ARTHUR, Moultrie, IL
Built 1989 Load: 28.5 t ADT: 50
TR 37
PoorOver: W FORK OKAW RIVER
3.5 MI N OF BETHANY, Moultrie, IL
Built 1985 Load: 30.5 t ADT: 350
TR 5
PoorOver: CREEK
2.5 MI NE LOVINGTON, Moultrie, IL
Built 1984 Load: 32.4 t ADT: 50
TR 140
PoorOver: JONATHAN CREEK
1.2 MI N WILLIAMSBUR, Moultrie, IL
Built 1983 Load: 37.9 t ADT: 100
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.