Bridge conditions in St. Clair County, Illinois
485 inventoried bridges · 45 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
45 of the 485 bridges the federal inventory lists in St. Clair County are rated poor; the rest split 235 good and 205 fair.
- 45 of the 485 bridges in St. Clair County, Illinois, are rated in poor condition (9.3%) in the 2025 National Bridge Inventory, as of .
- 235 bridges (48.5%) are rated good and 205 (42.3%) fair.
- The median St. Clair County bridge was built in 1979.
- The busiest poor-rated bridge is I-55/64; US 40 Psc over Trra (built 1966), carrying about 113,200 vehicles a day.
Good 48.5% · Fair 42.3% · Poor 9.3% of 485 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 |
|---|---|---|---|
| I-55/64; US 40 Psc over Trra | 1966 | 113,200 | Poor |
| I-55/70;/64 over Csxrr Nsrr Trrarr | 1959 | 66,500 | Poor |
| Fai 255 over Ill 15 | 1981 | 44,300 | Poor |
| I-255 over Nsrr | 1980 | 41,500 | Poor |
| Fai 255 over Ill 163 | 1980 | 41,500 | Poor |
| I-55/70 & US 40 EB over Drainage Canal | 1960 | 33,250 | Poor |
| Fai 255 over Stolle Rd Fau 9208 | 1979 | 31,400 | Poor |
| I-64 EB over Nsrr | 1971 | 15,500 | Poor |
| I-64 WB over Nsrr | 1971 | 15,500 | Poor |
| Il 111 over A&srr | 1973 | 13,900 | Poor |
| Ill 203 NB over Cahokia Canal | 1960 | 13,500 | Poor |
| Ill 203 SB over Cahokia Canal | 1960 | 13,500 | Poor |
| Ill 157 over Little Canteen Creek | 1929 | 10,900 | Poor |
| I-55/64 WB Cd R-li over UPRR | 1969 | 10,000 | Poor |
| Ill 159 over Douglas Creek | 1954 | 9,400 | Poor |
| Fau 9168 over Richland Creek | 1966 | 8,950 | Poor |
| 203SB Rmp to 55/70 over Drng to Cahokia Cnl | 1960 | 7,900 | Poor |
| US 50 over Ch 50/SUMERFIELD Rd | 1984 | 7,600 | Poor |
| Ill 177 over Silver Cr Overflow W | 1961 | 7,000 | Poor |
| Ill 177 over Silver Cr Overflow E | 1961 | 7,000 | Poor |
| Ill 157 over Goose Lake Canal | 1932 | 6,000 | Poor |
| 74TH St/ Fau 9253 over So RR 5 W Belleville | 1955 | 5,450 | Poor |
| Ill 15 & 4 over Kaskaskia River | 1946 | 3,600 | Poor |
| Il 111 over Csxrr (UPRR Kcsrr) | 1935 | 2,750 | Poor |
| Waterloo Rd/ Fas 8 over Gerhardt Creek | 1961 | 1,850 | Poor |
| Concordia Ch Rd/ch over Prairie Du Pont CR | 1958 | 800 | Poor |
| Forest BLVD(FAU915 over Schoenberger CR. | 1949 | 775 | Poor |
| Mud Creek Tr 308 over Mud Creek | 1969 | 750 | Poor |
| Werner Rd/ Fau 925 over Southern RR | 1960 | 525 | Poor |
| Ch 50 over Rayhill Slough | 1954 | 475 | Poor |
| Robinson Sch Rd/ch over Richland Creek | 1993 | 400 | Poor |
| Wagner Rd/ Tr 40 over Sparrow CR | 1971 | 400 | Poor |
| Reider Tr 222 over Engel Creek | 1981 | 400 | Poor |
| Press Rd/ Tr 197 over Richland Creek | 1922 | 375 | Poor |
| Five Forkse.rd/ch over Silver CR | 1987 | 350 | Poor |
| Plum Hill Tr 180 over Loop Creek | 1980 | 350 | Poor |
| Ch 68 over Mud Creek | 1962 | 250 | Poor |
| Otten Rd/ Tr 107 over Hickman Creek | 1978 | 250 | Poor |
| Haury Road over Ogles Creek | 1995 | 200 | Poor |
| Winter Rd Ch 49 over Doza Creek South | 1901 | 175 | Poor |
| Tr 298A over Rayhill Slough | 1956 | 175 | Poor |
| Emerald Mnd Rd/ch over Little Silver Creek | 1960 | 125 | Poor |
| N 89TH St over Creek | 1965 | 75 | Poor |
| Freeburg Twp.tr 20 over Drum Hill Br | 1966 | 75 | Poor |
| Black Quarter Tr 1 over Silver CR | 1961 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Psb I-55 64;US 40 over Mississippi River | 1963 | 113,200 | Fair |
| I-55/64; US 40 Psc over Trra | 1966 | 113,200 | Poor |
| I-55/64; US 40 EB over 4TH ST in E ST LOU | 1965 | 105,300 | Fair |
| EB 55/MLK Eb&wb Ap over 3RD ST EXIT to EStL | 1961 | 105,300 | Good |
| I-55/70;/64 over Csxrr Nsrr Trrarr | 1959 | 66,500 | Poor |
| I-55/64EB mainlne" over UPRR IL 3 ramp UPRR UPRR | 1995 | 56,600 | Fair |
| I-55/64; US 40 WB over Broadway & Metrolink | 1965 | 52,650 | Fair |
| I-55/64; US 40 EB over Broadway & Metrolink | 1965 | 52,650 | Fair |
| I-55/64; US 40 EB over Missouri Avenue | 1965 | 52,650 | Fair |
| I-55/64; US 40 EB over Ramps To/from Mlk Dr | 1961 | 52,650 | 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.