WB M-59(off Rmp) over Adams Rd on Ramp
Oakland County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- WB M-59(off Rmp) over Adams Rd on Ramp in Oakland 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 2004, making it 21 years old at the 2025 inventory.
- It carries about 8,600 vehicles a day (traffic count year 2004).
- Its listed owner is the state highway agency.
- It is one of 215 of the 513 inventoried bridges in Oakland County rated good (41.9%); 35 (6.8%) 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 October 2023, on a 24-month routine inspection cycle.
- 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 → (42.64631, -83.19596)
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 | Prestressed concrete multiple box beam |
| Length | about 88 ft |
| Location | Rochester Hills |
| NBI structure number | 000000000013106 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
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.