I-75 NB over Birch Run Creek
Saginaw County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-75 NB over Birch Run Creek in Saginaw 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 1961 and reconstructed in 1999, making it 64 years old at the 2025 inventory.
- It carries about 25,771 vehicles a day (traffic count year 2007).
- Its listed owner is the state highway agency.
- It is one of 165 of the 315 inventoried bridges in Saginaw County rated fair (52.4%); 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 August 2023, 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 → (43.27443, -83.79991)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 44 ft |
| Location | 4.1 Mi NW of Genesee Col |
| NBI structure number | 000000000009183 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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 NB over Cass River | 1961 | 56,192 | Good |
| 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 |
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.