Sanderson Ave over Augusta Drain
Oakland County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sanderson Ave over Augusta Drain in Oakland County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1969, making it 56 years old at the 2025 inventory.
- It carries about 500 vehicles a day (traffic count year 2024).
- Its listed owner is a city or municipal highway agency.
- It is one of 263 of the 513 inventoried bridges in Oakland County rated fair (51.3%); 35 (6.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (substructure 7 to 6).
- Its most recent inspection on record is dated July 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 → (42.64128, -83.30171)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete single box beam |
| Length | about 27 ft |
| Location | 0.15 Mi SW of Cass Ave |
| NBI structure number | 000000000008261 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| 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 Oakland County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-696 over I-75 & 4 Ramps | 1971 | 209,200 | Poor |
| I-696 over N Service Rd | 1971 | 209,200 | Fair |
| I-696 over N-s Service Road | 1982 | 192,100 | Fair |
| I-96 EB over 9 Mile Rd | 1971 | 182,700 | Fair |
| I-96 WB over 9 Mi Rd | 1972 | 182,700 | Fair |
| I-696 over Drake Rd | 1960 | 180,375 | Good |
All bridges nearby: Oakland County, MI bridge conditions · every bridge in Oakland County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.