29TH Street over Portage River
Kalamazoo County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 29TH Street over Portage River in Kalamazoo County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1962, making it 63 years old at the 2025 inventory.
- It carries about 784 vehicles a day (traffic count year 2019).
- Its listed owner is the county highway agency.
- It is one of 76 of the 152 inventoried bridges in Kalamazoo County rated fair (50.0%); 11 (7.2%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2024, on a 24-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 → (42.1274, -85.48051)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 49 ft |
| Location | 1 Mi S of Indian Lake |
| NBI structure number | 000000000004625 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 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 Kalamazoo County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-94 over Norfolk Southern | 2022 | 67,300 | Good |
| I-94 over Portage Road | 2022 | 67,300 | Good |
| US-131 (mot) over Amtrak & Kl Ave | 2024 | 48,600 | Good |
| I-94 EB & Cd Ramp over US-131 NB | 2008 | 39,044 | Good |
| I-94 WB over US-131 NB | 2007 | 39,044 | Good |
| I-94 Bl (stadium) over US-131 | 2015 | 36,361 | Fair |
All bridges nearby: Kalamazoo County, MI bridge conditions · every bridge in Kalamazoo County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.