I-75 NB over Cass River
Saginaw County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-75 NB over Cass River in Saginaw County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1961 and reconstructed in 2008, making it 64 years old at the 2025 inventory.
- It carries about 56,192 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 92 of the 315 inventoried bridges in Saginaw County rated good (29.2%); 58 (18.4%) 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 April 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (43.3409, -83.86358)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 279 ft |
| Location | 10.0 Mi NW of Genesee Co |
| NBI structure number | 000000000009185 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Saginaw County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 US-10 over CSX RR | 1961 | 47,480 | Fair |
| I-75 US-10 over CSX RR | 1958 | 46,000 | Fair |
| I-75 SB over CSX RR | 1958 | 38,000 | Fair |
| I-75 NB over CSX RR | 2021 | 32,900 | Good |
| I-75 SB over CSX RR | 2021 | 32,900 | Fair |
| I-75 NB over CSX RR | 1958 | 29,274 | Fair |
All bridges nearby: Saginaw County, MI bridge conditions · every bridge in Saginaw County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.