Napier Avenue over St Joseph River
Berrien County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Napier Avenue over St Joseph River in Berrien County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1966, making it 59 years old at the 2025 inventory.
- It carries about 17,334 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 181 of the 270 inventoried bridges in Berrien County rated fair (67.0%); 17 (6.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2024, on a 20-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (42.08849, -86.47432)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 600 ft |
| Location | E City Limit St Joseph |
| NBI structure number | 000000000000975 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 20 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Berrien County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-94 over Blue Creek | 1960 | 56,570 | Fair |
| I-94 over Nokmes Creek | 2020 | 45,139 | Good |
| I-94 WB over Sawyer Road | 1961 | 43,361 | Fair |
| I-94 EB over St Joseph River | 1960 | 34,063 | Fair |
| I-94 WB over St Joseph River | 1960 | 34,063 | Fair |
| I-94 over Mill Creek | 1959 | 30,064 | Fair |
All bridges nearby: Berrien County, MI bridge conditions · every bridge in Berrien County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.