Bridge conditions in Jefferson County, Missouri
410 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
10 of the 410 bridges the federal inventory lists in Jefferson County are rated poor; the rest split 143 good and 257 fair.
- 10 of the 410 bridges in Jefferson County, Missouri, are rated in poor condition (2.4%) in the 2025 National Bridge Inventory, as of .
- 143 bridges (34.9%) are rated good and 257 (62.7%) fair.
- The median Jefferson County bridge was built in 1993.
- The busiest poor-rated bridge is US 61 S over Brauhn CR (built 1923), carrying about 5,707 vehicles a day.
Good 34.9% · Fair 62.7% · Poor 2.4% of 410 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 |
|---|---|---|---|
| US 61 S over Brauhn CR | 1923 | 5,707 | Poor |
| US 61 S over Br of Brauhn CR | 1900 | 5,707 | Poor |
| US 61 S over Gibson CR | 1935 | 5,707 | Poor |
| US 61 S over Joachim CR | 1933 | 4,488 | Poor |
| Eime Rd over Trib of Big Rvr | 1900 | 305 | Poor |
| De Witt St over Tanyard Br | 1900 | 300 | Poor |
| Regina Rd over Trib of Belew CR | 1995 | 300 | Poor |
| Commerce Dr over Black CR | 1986 | 300 | Poor |
| Harness Rd over Plattin CR | 1906 | 242 | Poor |
| Harmony Hills Dr over Pomme CR | 1964 | 100 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 55 S over Tom CR | 1965 | 104,603 | Fair |
| Is 55 S over UP RR Desoto Sub | 2024 | 80,923 | Good |
| Is 55 S over Cst Herky-horine Rd | 2025 | 80,923 | Good |
| Is 55 S over Br Sandy CR | 1964 | 80,923 | Fair |
| Is 55 S over Cst Fifth St BNSF RR | 2011 | 70,419 | Good |
| Is 55 S over Cst Central Ave | 2024 | 70,419 | Good |
| Is 55 S over Cst Third St | 2024 | 70,419 | Good |
| Is 55 N over Rock CR | 2001 | 62,884 | Good |
| Is 55 N over Meramec Rvr | 1964 | 55,375 | Fair |
| Is 55 S over Rock CR | 2001 | 53,723 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Missouri: Missouri 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.