I-94 Conn SB Grati over 13 Mile Rd
Macomb County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-94 Conn SB Grati over 13 Mile Rd in Macomb 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 1964 and reconstructed in 2003, making it 61 years old at the 2025 inventory.
- It carries about 17,021 vehicles a day (traffic count year 2007).
- Its listed owner is the state highway agency.
- It is one of 179 of the 417 inventoried bridges in Macomb County rated good (42.9%); 30 (7.2%) 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 June 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 → (42.52476, -82.91645)
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 | Steel stringer or multi-beam girder |
| Length | about 133 ft |
| Location | In Roseville (13 Mi Rd) |
| NBI structure number | 000000000006072 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 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 Macomb County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U Turn @ Augustine over I-696 | 1972 | 147,000 | Fair |
| I-94 over 13 Mile Rd | 1965 | 101,088 | Fair |
| I-94 over Little Mack Ave | 2002 | 101,088 | Good |
| I-94 over Masonic Blvd | 1965 | 99,698 | Fair |
| I-94 over 14 Mile Rd | 1964 | 99,698 | Fair |
| I-94 over Quinn Rd | 2002 | 99,698 | Fair |
All bridges nearby: Macomb County, MI bridge conditions · every bridge in Macomb County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.