Bridge conditions in Macoupin County, Illinois
240 inventoried bridges · 40 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 240 Macoupin County bridges in the federal inventory, 40 carry a poor rating. That 16.7% share is roughly 2x the national average.
- 40 of the 240 bridges in Macoupin County, Illinois, are rated in poor condition (16.7%) in the 2025 National Bridge Inventory, as of .
- 89 bridges (37.1%) are rated good and 111 (46.2%) fair.
- The median Macoupin County bridge was built in 1977.
- The busiest poor-rated bridge is Il 111 over Piasa Creek (built 1929), carrying about 4,200 vehicles a day.
Good 37.1% · Fair 46.2% · Poor 16.7% of 240 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 111 over Piasa Creek | 1929 | 4,200 | Poor |
| Fas 736 over Girder Br | 1919 | 2,650 | Poor |
| Fas 0736 over Wood River | 1932 | 1,900 | Poor |
| Bunkr Hil Stuntn R over Paddock Creek | 1980 | 1,250 | Poor |
| Fas 732 over Otter Lake | 1968 | 950 | Poor |
| Staunton Bunkr Hil over Br. Sherrycreek | 1970 | 900 | Poor |
| Tr 395 over Fai 55 | 1973 | 650 | Poor |
| 9 Mi. Lane over Sugar Creek | 1932 | 650 | Poor |
| Ch 36 over E.fk. Otter Ck. | 1959 | 450 | Poor |
| Ch 29 over Cahaoka Creek | 1975 | 350 | Poor |
| Fas 1728 over Lake | 2000 | 350 | Poor |
| Fas 1737 over Joes Crk | 1967 | 200 | Poor |
| Tr 488 over Brush Crk | 1955 | 200 | Poor |
| Township Road 451 over Girder CR | 1900 | 200 | Poor |
| Ch 11 over Massa Creek | 1940 | 150 | Poor |
| Tr 205 over Creek | 1965 | 150 | Poor |
| Tr 429 over E Fk Wood R | 1969 | 125 | Poor |
| Old Il 4 over Hurricane Creek | 1921 | 100 | Poor |
| Tr 33 over Brush Crk. | 1954 | 100 | Poor |
| Tr 166 over Coop Br | 1917 | 100 | Poor |
| Tr 98 over Solomon CR | 1977 | 100 | Poor |
| Tr 402 over Sugar CR | 1900 | 100 | Poor |
| Tr 189 over Anderson Branch | 1900 | 100 | Poor |
| Ch 34 over Solomon Crk. | 1900 | 50 | Poor |
| Tr 173 over Joe Creek | 1916 | 50 | Poor |
| Tr 130 over Lick Crk | 1960 | 50 | Poor |
| Tr 170 over Macoupin Crk | 1900 | 50 | Poor |
| Tr 307 over Coop Branch | 1968 | 50 | Poor |
| Tr 359 over Cahokia Creek | 1900 | 50 | Poor |
| Tr 359 over Cahokia Creek | 1900 | 50 | Poor |
| Township Road 151 over Creek | 1981 | 50 | Poor |
| Tr 352 over Creek | 1991 | 50 | Poor |
| Tr 285 over Honey Crk. | 1900 | 35 | Poor |
| Tr 498 over Creek | 1900 | 35 | Poor |
| Old Il 4 over Honey Creek | 1920 | 20 | Poor |
| Tr 13 over Sugar Creek | 1900 | 20 | Poor |
| Tr 253/CROSSCREEK over Shaw Pt Br | 1900 | 20 | Poor |
| Tr 496 over Horse Crk. | 1916 | 20 | Poor |
| Tr 424 over Honey Creek | 1994 | 20 | Poor |
| Tr 464 over Cahokia CR | 2002 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 55 SB over Tr 439 | 1973 | 15,200 | Fair |
| Fai 55 NB over Tr 439 | 1973 | 15,200 | Fair |
| Ill 108 over Drainage Ditch | 1933 | 6,950 | Fair |
| Ill 4 over East Fork Creek | 1957 | 4,800 | Fair |
| Il 111 over Little Piasa Creek | 1929 | 4,550 | Fair |
| Il 111 over S Br Little Piasa CR | 1929 | 4,550 | Fair |
| Il 4 over Macoupin Creek | 1960 | 4,450 | Fair |
| Il 4 over Macoupin CR Trib | 1960 | 4,450 | Fair |
| Il 111 over Piasa Creek | 1929 | 4,200 | Poor |
| Il 111 over Piasa CR Branch | 1930 | 4,200 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Illinois: Illinois bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.