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Infrastructure Grade
Infrastructure Report Card
8.8% of bridges in poor condition
Total Bridges
24,647
Poor Condition
2,163(8.8%)
Avg Bridge Age
46 yrs
Trend
Stable
| Metric | Missouri | National Avg | Trend |
|---|---|---|---|
| % Poor Condition | 8.8% | 6.7% | Stable |
| vs. National Average | +2.1 pts | -- | -- |
| Average Bridge Age | 46 yrs | 48 yrs | -- |
| Good or Better | 12,532(50.8%) | -- | -- |
Grade Scale
Percentage of bridges in poor condition over time. The dashed line shows the national average for comparison.
Total Bridges
24,647
Poor Condition
2,163(8.8%)
Average Age
46 yrs
Daily Crossings
92.8M
Good or Better
12,532(50.8%)
These bridges have at least one major component rated "5" (Fair) — one step above the poor threshold. Sorted by daily traffic to highlight highest-impact structures at risk.
| Bridge | Location | Deck | Super | Sub | Daily Traffic |
|---|---|---|---|---|---|
| IS 270 E | St. Louis County | 6 | 5 | 5 | 162,180 |
| IS 70 E | St. Louis County | 6 | 5 | 6 | 159,362 |
| IS 35 S | Jackson County | 7 | 5 | 7 | 147,773 |
| IS 70 E | St. Louis County | 5 | 5 | 5 | 140,710 |
| IS 55 S | St. Louis city | 5 | 5 | 5 | 120,209 |
| IS 70 E | St. Charles County | 6 | 5 | 5 | 108,528 |
| IS 29 S | Clay County | 6 | 5 | 5 | 108,151 |
| IS 270 E | St. Louis County | 5 | 5 | 6 | 105,806 |
| IS 70 E | St. Louis city | 5 | 5 | 7 | 100,176 |
| IS 170 E | St. Louis County | 6 | 6 | 5 | 97,246 |
| IS 70 E | St. Louis city | 7 | 5 | 7 | 95,308 |
| IS 470 E | Jackson County | 5 | 5 | 6 | 95,218 |
| IS 170 E | St. Louis County | 6 | 6 | 5 | 95,057 |
| IS 470 E | Jackson County | 5 | 5 | 6 | 94,922 |
| IS 170 E | St. Louis County | 5 | 6 | 5 | 91,663 |
The 10 bridges in poorest condition, ranked by lowest sufficiency rating.
over SHOAL CR
over BNSF RR
over MID FK OF SALT RVR
over LAMINE RVR
over DEER CR
over DRYWOOD CR
over LIT WELDON RVR
over TRIB OF BIG CR
over MITCHEL CR
over MNA RR
States with similar infrastructure profiles, ranked by percentage of bridges in poor condition.
Grading: Grades are based on the percentage of bridges classified as "poor condition." A bridge is in poor condition when at least one major component (deck, superstructure, or substructure) is rated 4 or below on the NBI 0-9 scale.
Data Source: Federal Highway Administration (FHWA) National Bridge Inventory (NBI). Data is updated annually. BridgeStats is not affiliated with or endorsed by the FHWA.
Watchlist Criteria: Bridges with any component rated "5" (Fair) are one step from the poor threshold of 4 and are flagged for monitoring. These bridges are not yet in poor condition but may deteriorate without maintenance.